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Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (35 commits)
  perf: Fix unexported generic perf_arch_fetch_caller_regs
  perf record: Don't try to find buildids in a zero sized file
  perf: export perf_trace_regs and perf_arch_fetch_caller_regs
  perf, x86: Fix hw_perf_enable() event assignment
  perf, ppc: Fix compile error due to new cpu notifiers
  perf: Make the install relative to DESTDIR if specified
  kprobes: Calculate the index correctly when freeing the out-of-line execution slot
  perf tools: Fix sparse CPU numbering related bugs
  perf_event: Fix oops triggered by cpu offline/online
  perf: Drop the obsolete profile naming for trace events
  perf: Take a hot regs snapshot for trace events
  perf: Introduce new perf_fetch_caller_regs() for hot regs snapshot
  perf/x86-64: Use frame pointer to walk on irq and process stacks
  lockdep: Move lock events under lockdep recursion protection
  perf report: Print the map table just after samples for which no map was found
  perf report: Add multiple event support
  perf session: Change perf_session post processing functions to take histogram tree
  perf session: Add storage for seperating event types in report
  perf session: Change add_hist_entry to take the tree root instead of session
  perf record: Add ID and to recorded event data when recording multiple events
  ...
This commit is contained in:
Linus Torvalds 2010-03-18 16:52:46 -07:00
parent c6b9e73f2f dcd5c1662d
commit f82c37e7bb
39 changed files with 741 additions and 398 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/powerpc/kernel/perf_event.c
View File

@ -1287,7 +1287,7 @@ static void perf_event_interrupt(struct pt_regs *regs)
irq_exit();
}
void hw_perf_event_setup(int cpu)
static void power_pmu_setup(int cpu)
{
struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
@ -1297,6 +1297,23 @@ void hw_perf_event_setup(int cpu)
cpuhw->mmcr[0] = MMCR0_FC;
}
static int __cpuinit
power_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
{
unsigned int cpu = (long)hcpu;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
power_pmu_setup(cpu);
break;
default:
break;
}
return NOTIFY_OK;
}
int register_power_pmu(struct power_pmu *pmu)
{
if (ppmu)
@ -1314,5 +1331,7 @@ int register_power_pmu(struct power_pmu *pmu)
freeze_events_kernel = MMCR0_FCHV;
#endif /* CONFIG_PPC64 */
perf_cpu_notifier(power_pmu_notifier);
return 0;
}

20
arch/sh/kernel/perf_event.c
View File

@ -275,13 +275,30 @@ const struct pmu *hw_perf_event_init(struct perf_event *event)
return &pmu;
}
void hw_perf_event_setup(int cpu)
static void sh_pmu_setup(int cpu)
{
struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
memset(cpuhw, 0, sizeof(struct cpu_hw_events));
}
static int __cpuinit
sh_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
{
unsigned int cpu = (long)hcpu;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
sh_pmu_setup(cpu);
break;
default:
break;
}
return NOTIFY_OK;
}
void hw_perf_enable(void)
{
if (!sh_pmu_initialized())
@ -308,5 +325,6 @@ int register_sh_pmu(struct sh_pmu *pmu)
WARN_ON(pmu->num_events > MAX_HWEVENTS);
perf_cpu_notifier(sh_pmu_notifier);
return 0;
}

183
arch/x86/kernel/cpu/perf_event.c
View File

@ -133,8 +133,8 @@ struct x86_pmu {
int (*handle_irq)(struct pt_regs *);
void (*disable_all)(void);
void (*enable_all)(void);
void (*enable)(struct hw_perf_event *, int);
void (*disable)(struct hw_perf_event *, int);
void (*enable)(struct perf_event *);
void (*disable)(struct perf_event *);
unsigned eventsel;
unsigned perfctr;
u64 (*event_map)(int);
@ -157,6 +157,11 @@ struct x86_pmu {
void (*put_event_constraints)(struct cpu_hw_events *cpuc,
struct perf_event *event);
struct event_constraint *event_constraints;
void (*cpu_prepare)(int cpu);
void (*cpu_starting)(int cpu);
void (*cpu_dying)(int cpu);
void (*cpu_dead)(int cpu);
};
static struct x86_pmu x86_pmu __read_mostly;
@ -165,8 +170,7 @@ static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = {
.enabled = 1,
};
static int x86_perf_event_set_period(struct perf_event *event,
struct hw_perf_event *hwc, int idx);
static int x86_perf_event_set_period(struct perf_event *event);
/*
* Generalized hw caching related hw_event table, filled
@ -189,11 +193,12 @@ static u64 __read_mostly hw_cache_event_ids
* Returns the delta events processed.
*/
static u64
x86_perf_event_update(struct perf_event *event,
struct hw_perf_event *hwc, int idx)
x86_perf_event_update(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int shift = 64 - x86_pmu.event_bits;
u64 prev_raw_count, new_raw_count;
int idx = hwc->idx;
s64 delta;
if (idx == X86_PMC_IDX_FIXED_BTS)
@ -293,7 +298,7 @@ static inline bool bts_available(void)
return x86_pmu.enable_bts != NULL;
}
static inline void init_debug_store_on_cpu(int cpu)
static void init_debug_store_on_cpu(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
@ -305,7 +310,7 @@ static inline void init_debug_store_on_cpu(int cpu)
(u32)((u64)(unsigned long)ds >> 32));
}
static inline void fini_debug_store_on_cpu(int cpu)
static void fini_debug_store_on_cpu(int cpu)
{
if (!per_cpu(cpu_hw_events, cpu).ds)
return;
@ -638,7 +643,7 @@ static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
if (test_bit(hwc->idx, used_mask))
break;
set_bit(hwc->idx, used_mask);
__set_bit(hwc->idx, used_mask);
if (assign)
assign[i] = hwc->idx;
}
@ -687,7 +692,7 @@ static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
if (j == X86_PMC_IDX_MAX)
break;
set_bit(j, used_mask);
__set_bit(j, used_mask);
if (assign)
assign[i] = j;
@ -780,6 +785,7 @@ static inline int match_prev_assignment(struct hw_perf_event *hwc,
hwc->last_tag == cpuc->tags[i];
}
static int x86_pmu_start(struct perf_event *event);
static void x86_pmu_stop(struct perf_event *event);
void hw_perf_enable(void)
@ -796,6 +802,7 @@ void hw_perf_enable(void)
return;
if (cpuc->n_added) {
int n_running = cpuc->n_events - cpuc->n_added;
/*
* apply assignment obtained either from
* hw_perf_group_sched_in() or x86_pmu_enable()
@ -803,8 +810,7 @@ void hw_perf_enable(void)
* step1: save events moving to new counters
* step2: reprogram moved events into new counters
*/
for (i = 0; i < cpuc->n_events; i++) {
for (i = 0; i < n_running; i++) {
event = cpuc->event_list[i];
hwc = &event->hw;
@ -819,29 +825,18 @@ void hw_perf_enable(void)
continue;
x86_pmu_stop(event);
hwc->idx = -1;
}
for (i = 0; i < cpuc->n_events; i++) {
event = cpuc->event_list[i];
hwc = &event->hw;
if (hwc->idx == -1) {
if (!match_prev_assignment(hwc, cpuc, i))
x86_assign_hw_event(event, cpuc, i);
x86_perf_event_set_period(event, hwc, hwc->idx);
}
/*
* need to mark as active because x86_pmu_disable()
* clear active_mask and events[] yet it preserves
* idx
*/
set_bit(hwc->idx, cpuc->active_mask);
cpuc->events[hwc->idx] = event;
else if (i < n_running)
continue;
x86_pmu.enable(hwc, hwc->idx);
perf_event_update_userpage(event);
x86_pmu_start(event);
}
cpuc->n_added = 0;
perf_events_lapic_init();
@ -853,15 +848,16 @@ void hw_perf_enable(void)
x86_pmu.enable_all();
}
static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc, int idx)
static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc)
{
(void)checking_wrmsrl(hwc->config_base + idx,
(void)checking_wrmsrl(hwc->config_base + hwc->idx,
hwc->config | ARCH_PERFMON_EVENTSEL_ENABLE);
}
static inline void x86_pmu_disable_event(struct hw_perf_event *hwc, int idx)
static inline void x86_pmu_disable_event(struct perf_event *event)
{
(void)checking_wrmsrl(hwc->config_base + idx, hwc->config);
struct hw_perf_event *hwc = &event->hw;
(void)checking_wrmsrl(hwc->config_base + hwc->idx, hwc->config);
}
static DEFINE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left);
@ -871,12 +867,12 @@ static DEFINE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left);
* To be called with the event disabled in hw:
*/
static int
x86_perf_event_set_period(struct perf_event *event,
struct hw_perf_event *hwc, int idx)
x86_perf_event_set_period(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
s64 left = atomic64_read(&hwc->period_left);
s64 period = hwc->sample_period;
int err, ret = 0;
int err, ret = 0, idx = hwc->idx;
if (idx == X86_PMC_IDX_FIXED_BTS)
return 0;
@ -922,11 +918,11 @@ x86_perf_event_set_period(struct perf_event *event,
return ret;
}
static void x86_pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void x86_pmu_enable_event(struct perf_event *event)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
if (cpuc->enabled)
__x86_pmu_enable_event(hwc, idx);
__x86_pmu_enable_event(&event->hw);
}
/*
@ -962,34 +958,32 @@ static int x86_pmu_enable(struct perf_event *event)
memcpy(cpuc->assign, assign, n*sizeof(int));
cpuc->n_events = n;
cpuc->n_added = n - n0;
cpuc->n_added += n - n0;
return 0;
}
static int x86_pmu_start(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
int idx = event->hw.idx;
if (hwc->idx == -1)
if (idx == -1)
return -EAGAIN;
x86_perf_event_set_period(event, hwc, hwc->idx);
x86_pmu.enable(hwc, hwc->idx);
x86_perf_event_set_period(event);
cpuc->events[idx] = event;
__set_bit(idx, cpuc->active_mask);
x86_pmu.enable(event);
perf_event_update_userpage(event);
return 0;
}
static void x86_pmu_unthrottle(struct perf_event *event)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
if (WARN_ON_ONCE(hwc->idx >= X86_PMC_IDX_MAX ||
cpuc->events[hwc->idx] != event))
return;
x86_pmu.enable(hwc, hwc->idx);
int ret = x86_pmu_start(event);
WARN_ON_ONCE(ret);
}
void perf_event_print_debug(void)
@ -1049,18 +1043,16 @@ static void x86_pmu_stop(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
/*
* Must be done before we disable, otherwise the nmi handler
* could reenable again:
*/
clear_bit(idx, cpuc->active_mask);
x86_pmu.disable(hwc, idx);
if (!__test_and_clear_bit(idx, cpuc->active_mask))
return;
x86_pmu.disable(event);
/*
* Drain the remaining delta count out of a event
* that we are disabling:
*/
x86_perf_event_update(event, hwc, idx);
x86_perf_event_update(event);
cpuc->events[idx] = NULL;
}
@ -1108,7 +1100,7 @@ static int x86_pmu_handle_irq(struct pt_regs *regs)
event = cpuc->events[idx];
hwc = &event->hw;
val = x86_perf_event_update(event, hwc, idx);
val = x86_perf_event_update(event);
if (val & (1ULL << (x86_pmu.event_bits - 1)))
continue;
@ -1118,11 +1110,11 @@ static int x86_pmu_handle_irq(struct pt_regs *regs)
handled = 1;
data.period = event->hw.last_period;
if (!x86_perf_event_set_period(event, hwc, idx))
if (!x86_perf_event_set_period(event))
continue;
if (perf_event_overflow(event, 1, &data, regs))
x86_pmu.disable(hwc, idx);
x86_pmu_stop(event);
}
if (handled)
@ -1309,7 +1301,7 @@ int hw_perf_group_sched_in(struct perf_event *leader,
memcpy(cpuc->assign, assign, n0*sizeof(int));
cpuc->n_events = n0;
cpuc->n_added = n1;
cpuc->n_added += n1;
ctx->nr_active += n1;
/*
@ -1337,6 +1329,39 @@ int hw_perf_group_sched_in(struct perf_event *leader,
#include "perf_event_p6.c"
#include "perf_event_intel.c"
static int __cpuinit
x86_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
{
unsigned int cpu = (long)hcpu;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
if (x86_pmu.cpu_prepare)
x86_pmu.cpu_prepare(cpu);
break;
case CPU_STARTING:
if (x86_pmu.cpu_starting)
x86_pmu.cpu_starting(cpu);
break;
case CPU_DYING:
if (x86_pmu.cpu_dying)
x86_pmu.cpu_dying(cpu);
break;
case CPU_DEAD:
if (x86_pmu.cpu_dead)
x86_pmu.cpu_dead(cpu);
break;
default:
break;
}
return NOTIFY_OK;
}
static void __init pmu_check_apic(void)
{
if (cpu_has_apic)
@ -1415,11 +1440,13 @@ void __init init_hw_perf_events(void)
pr_info("... max period: %016Lx\n", x86_pmu.max_period);
pr_info("... fixed-purpose events: %d\n", x86_pmu.num_events_fixed);
pr_info("... event mask: %016Lx\n", perf_event_mask);
perf_cpu_notifier(x86_pmu_notifier);
}
static inline void x86_pmu_read(struct perf_event *event)
{
x86_perf_event_update(event, &event->hw, event->hw.idx);
x86_perf_event_update(event);
}
static const struct pmu pmu = {
@ -1675,28 +1702,16 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
return entry;
}
void hw_perf_event_setup_online(int cpu)
#ifdef CONFIG_EVENT_TRACING
void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
{
init_debug_store_on_cpu(cpu);
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_AMD:
amd_pmu_cpu_online(cpu);
break;
default:
return;
}
}
void hw_perf_event_setup_offline(int cpu)
{
init_debug_store_on_cpu(cpu);
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_AMD:
amd_pmu_cpu_offline(cpu);
break;
default:
return;
}
regs->ip = ip;
/*
* perf_arch_fetch_caller_regs adds another call, we need to increment
* the skip level
*/
regs->bp = rewind_frame_pointer(skip + 1);
regs->cs = __KERNEL_CS;
local_save_flags(regs->flags);
}
#endif

62
arch/x86/kernel/cpu/perf_event_amd.c
View File

@ -271,28 +271,6 @@ amd_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
return &emptyconstraint;
}
static __initconst struct x86_pmu amd_pmu = {
.name = "AMD",
.handle_irq = x86_pmu_handle_irq,
.disable_all = x86_pmu_disable_all,
.enable_all = x86_pmu_enable_all,
.enable = x86_pmu_enable_event,
.disable = x86_pmu_disable_event,
.eventsel = MSR_K7_EVNTSEL0,
.perfctr = MSR_K7_PERFCTR0,
.event_map = amd_pmu_event_map,
.raw_event = amd_pmu_raw_event,
.max_events = ARRAY_SIZE(amd_perfmon_event_map),
.num_events = 4,
.event_bits = 48,
.event_mask = (1ULL << 48) - 1,
.apic = 1,
/* use highest bit to detect overflow */
.max_period = (1ULL << 47) - 1,
.get_event_constraints = amd_get_event_constraints,
.put_event_constraints = amd_put_event_constraints
};
static struct amd_nb *amd_alloc_nb(int cpu, int nb_id)
{
struct amd_nb *nb;
@ -309,7 +287,7 @@ static struct amd_nb *amd_alloc_nb(int cpu, int nb_id)
* initialize all possible NB constraints
*/
for (i = 0; i < x86_pmu.num_events; i++) {
set_bit(i, nb->event_constraints[i].idxmsk);
__set_bit(i, nb->event_constraints[i].idxmsk);
nb->event_constraints[i].weight = 1;
}
return nb;
@ -378,6 +356,31 @@ static void amd_pmu_cpu_offline(int cpu)
raw_spin_unlock(&amd_nb_lock);
}
static __initconst struct x86_pmu amd_pmu = {
.name = "AMD",
.handle_irq = x86_pmu_handle_irq,
.disable_all = x86_pmu_disable_all,
.enable_all = x86_pmu_enable_all,
.enable = x86_pmu_enable_event,
.disable = x86_pmu_disable_event,
.eventsel = MSR_K7_EVNTSEL0,
.perfctr = MSR_K7_PERFCTR0,
.event_map = amd_pmu_event_map,
.raw_event = amd_pmu_raw_event,
.max_events = ARRAY_SIZE(amd_perfmon_event_map),
.num_events = 4,
.event_bits = 48,
.event_mask = (1ULL << 48) - 1,
.apic = 1,
/* use highest bit to detect overflow */
.max_period = (1ULL << 47) - 1,
.get_event_constraints = amd_get_event_constraints,
.put_event_constraints = amd_put_event_constraints,
.cpu_prepare = amd_pmu_cpu_online,
.cpu_dead = amd_pmu_cpu_offline,
};
static __init int amd_pmu_init(void)
{
/* Performance-monitoring supported from K7 and later: */
@ -390,11 +393,6 @@ static __init int amd_pmu_init(void)
memcpy(hw_cache_event_ids, amd_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
/*
* explicitly initialize the boot cpu, other cpus will get
* the cpu hotplug callbacks from smp_init()
*/
amd_pmu_cpu_online(smp_processor_id());
return 0;
}
@ -405,12 +403,4 @@ static int amd_pmu_init(void)
return 0;
}
static void amd_pmu_cpu_online(int cpu)
{
}
static void amd_pmu_cpu_offline(int cpu)
{
}
#endif

57
arch/x86/kernel/cpu/perf_event_intel.c
View File

@ -548,9 +548,9 @@ static inline void intel_pmu_ack_status(u64 ack)
}
static inline void
intel_pmu_disable_fixed(struct hw_perf_event *hwc, int __idx)
intel_pmu_disable_fixed(struct hw_perf_event *hwc)
{
int idx = __idx - X86_PMC_IDX_FIXED;
int idx = hwc->idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, mask;
mask = 0xfULL << (idx * 4);
@ -621,26 +621,28 @@ static void intel_pmu_drain_bts_buffer(void)
}
static inline void
intel_pmu_disable_event(struct hw_perf_event *hwc, int idx)
intel_pmu_disable_event(struct perf_event *event)
{
if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) {
struct hw_perf_event *hwc = &event->hw;
if (unlikely(hwc->idx == X86_PMC_IDX_FIXED_BTS)) {
intel_pmu_disable_bts();
intel_pmu_drain_bts_buffer();
return;
}
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
intel_pmu_disable_fixed(hwc, idx);
intel_pmu_disable_fixed(hwc);
return;
}
x86_pmu_disable_event(hwc, idx);
x86_pmu_disable_event(event);
}
static inline void
intel_pmu_enable_fixed(struct hw_perf_event *hwc, int __idx)
intel_pmu_enable_fixed(struct hw_perf_event *hwc)
{
int idx = __idx - X86_PMC_IDX_FIXED;
int idx = hwc->idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, bits, mask;
int err;
@ -670,9 +672,11 @@ intel_pmu_enable_fixed(struct hw_perf_event *hwc, int __idx)
err = checking_wrmsrl(hwc->config_base, ctrl_val);
}
static void intel_pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void intel_pmu_enable_event(struct perf_event *event)
{
if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) {
struct hw_perf_event *hwc = &event->hw;
if (unlikely(hwc->idx == X86_PMC_IDX_FIXED_BTS)) {
if (!__get_cpu_var(cpu_hw_events).enabled)
return;
@ -681,11 +685,11 @@ static void intel_pmu_enable_event(struct hw_perf_event *hwc, int idx)
}
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
intel_pmu_enable_fixed(hwc, idx);
intel_pmu_enable_fixed(hwc);
return;
}
__x86_pmu_enable_event(hwc, idx);
__x86_pmu_enable_event(hwc);
}
/*
@ -694,14 +698,8 @@ static void intel_pmu_enable_event(struct hw_perf_event *hwc, int idx)
*/
static int intel_pmu_save_and_restart(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
int ret;
x86_perf_event_update(event, hwc, idx);
ret = x86_perf_event_set_period(event, hwc, idx);
return ret;
x86_perf_event_update(event);
return x86_perf_event_set_period(event);
}
static void intel_pmu_reset(void)
@ -745,11 +743,11 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
cpuc = &__get_cpu_var(cpu_hw_events);
perf_disable();
intel_pmu_disable_all();
intel_pmu_drain_bts_buffer();
status = intel_pmu_get_status();
if (!status) {
perf_enable();
intel_pmu_enable_all();
return 0;
}
@ -759,8 +757,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
WARN_ONCE(1, "perfevents: irq loop stuck!\n");
perf_event_print_debug();
intel_pmu_reset();
perf_enable();
return 1;
goto done;
}
inc_irq_stat(apic_perf_irqs);
@ -768,7 +765,6 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
struct perf_event *event = cpuc->events[bit];
clear_bit(bit, (unsigned long *) &status);
if (!test_bit(bit, cpuc->active_mask))
continue;
@ -778,7 +774,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
data.period = event->hw.last_period;
if (perf_event_overflow(event, 1, &data, regs))
intel_pmu_disable_event(&event->hw, bit);
x86_pmu_stop(event);
}
intel_pmu_ack_status(ack);
@ -790,8 +786,8 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
if (status)
goto again;
perf_enable();
done:
intel_pmu_enable_all();
return 1;
}
@ -870,7 +866,10 @@ static __initconst struct x86_pmu intel_pmu = {
.max_period = (1ULL << 31) - 1,
.enable_bts = intel_pmu_enable_bts,
.disable_bts = intel_pmu_disable_bts,
.get_event_constraints = intel_get_event_constraints
.get_event_constraints = intel_get_event_constraints,
.cpu_starting = init_debug_store_on_cpu,
.cpu_dying = fini_debug_store_on_cpu,
};
static __init int intel_pmu_init(void)

10
arch/x86/kernel/cpu/perf_event_p6.c
View File

@ -77,27 +77,29 @@ static void p6_pmu_enable_all(void)
}
static inline void
p6_pmu_disable_event(struct hw_perf_event *hwc, int idx)
p6_pmu_disable_event(struct perf_event *event)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
u64 val = P6_NOP_EVENT;
if (cpuc->enabled)
val |= ARCH_PERFMON_EVENTSEL_ENABLE;
(void)checking_wrmsrl(hwc->config_base + idx, val);
(void)checking_wrmsrl(hwc->config_base + hwc->idx, val);
}
static void p6_pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void p6_pmu_enable_event(struct perf_event *event)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
u64 val;
val = hwc->config;
if (cpuc->enabled)
val |= ARCH_PERFMON_EVENTSEL_ENABLE;
(void)checking_wrmsrl(hwc->config_base + idx, val);
(void)checking_wrmsrl(hwc->config_base + hwc->idx, val);
}
static __initconst struct x86_pmu p6_pmu = {

15
arch/x86/kernel/dumpstack.h
View File

@ -29,4 +29,19 @@ struct stack_frame {
struct stack_frame *next_frame;
unsigned long return_address;
};
static inline unsigned long rewind_frame_pointer(int n)
{
struct stack_frame *frame;
get_bp(frame);
#ifdef CONFIG_FRAME_POINTER
while (n--)
frame = frame->next_frame;
#endif
return (unsigned long)frame;
}
#endif /* DUMPSTACK_H */

4
arch/x86/kernel/dumpstack_64.c
View File

@ -208,7 +208,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
if (ops->stack(data, "IRQ") < 0)
break;
bp = print_context_stack(tinfo, stack, bp,
bp = ops->walk_stack(tinfo, stack, bp,
ops, data, irq_stack_end, &graph);
/*
* We link to the next stack (which would be
@ -229,7 +229,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
/*
* This handles the process stack:
*/
bp = print_context_stack(tinfo, stack, bp, ops, data, NULL, &graph);
bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph);
put_cpu();
}
EXPORT_SYMBOL(dump_trace);

23
include/linux/ftrace_event.h
View File

@ -131,12 +131,12 @@ struct ftrace_event_call {
void *mod;
void *data;
int profile_count;
int (*profile_enable)(struct ftrace_event_call *);
void (*profile_disable)(struct ftrace_event_call *);
int perf_refcount;
int (*perf_event_enable)(struct ftrace_event_call *);
void (*perf_event_disable)(struct ftrace_event_call *);
};
#define FTRACE_MAX_PROFILE_SIZE 2048
#define PERF_MAX_TRACE_SIZE 2048
#define MAX_FILTER_PRED 32
#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
@ -187,22 +187,25 @@ do { \
#ifdef CONFIG_PERF_EVENTS
struct perf_event;
extern int ftrace_profile_enable(int event_id);
extern void ftrace_profile_disable(int event_id);
DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
extern int perf_trace_enable(int event_id);
extern void perf_trace_disable(int event_id);
extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
char *filter_str);
extern void ftrace_profile_free_filter(struct perf_event *event);
extern void *
ftrace_perf_buf_prepare(int size, unsigned short type, int *rctxp,
perf_trace_buf_prepare(int size, unsigned short type, int *rctxp,
unsigned long *irq_flags);
static inline void
ftrace_perf_buf_submit(void *raw_data, int size, int rctx, u64 addr,
u64 count, unsigned long irq_flags)
perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
u64 count, unsigned long irq_flags, struct pt_regs *regs)
{
struct trace_entry *entry = raw_data;
perf_tp_event(entry->type, addr, count, raw_data, size);
perf_tp_event(entry->type, addr, count, raw_data, size, regs);
perf_swevent_put_recursion_context(rctx);
local_irq_restore(irq_flags);
}

59
include/linux/perf_event.h
View File

@ -452,6 +452,8 @@ enum perf_callchain_context {
#include <linux/fs.h>
#include <linux/pid_namespace.h>
#include <linux/workqueue.h>
#include <linux/ftrace.h>
#include <linux/cpu.h>
#include <asm/atomic.h>
#define PERF_MAX_STACK_DEPTH 255
@ -847,6 +849,44 @@ perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
__perf_sw_event(event_id, nr, nmi, regs, addr);
}
extern void
perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
/*
* Take a snapshot of the regs. Skip ip and frame pointer to
* the nth caller. We only need a few of the regs:
* - ip for PERF_SAMPLE_IP
* - cs for user_mode() tests
* - bp for callchains
* - eflags, for future purposes, just in case
*/
static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
{
unsigned long ip;
memset(regs, 0, sizeof(*regs));
switch (skip) {
case 1 :
ip = CALLER_ADDR0;
break;
case 2 :
ip = CALLER_ADDR1;
break;
case 3 :
ip = CALLER_ADDR2;
break;
case 4:
ip = CALLER_ADDR3;
break;
/* No need to support further for now */
default:
ip = 0;
}
return perf_arch_fetch_caller_regs(regs, ip, skip);
}
extern void __perf_event_mmap(struct vm_area_struct *vma);
static inline void perf_event_mmap(struct vm_area_struct *vma)
@ -880,7 +920,8 @@ static inline bool perf_paranoid_kernel(void)
}
extern void perf_event_init(void);
extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, int entry_size);
extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
int entry_size, struct pt_regs *regs);
extern void perf_bp_event(struct perf_event *event, void *data);
#ifndef perf_misc_flags
@ -936,5 +977,21 @@ static inline void perf_event_disable(struct perf_event *event) { }
#define perf_output_put(handle, x) \
perf_output_copy((handle), &(x), sizeof(x))
/*
* This has to have a higher priority than migration_notifier in sched.c.
*/
#define perf_cpu_notifier(fn) \
do { \
static struct notifier_block fn##_nb __cpuinitdata = \
{ .notifier_call = fn, .priority = 20 }; \
fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
(void *)(unsigned long)smp_processor_id()); \
fn(&fn##_nb, (unsigned long)CPU_STARTING, \
(void *)(unsigned long)smp_processor_id()); \
fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
(void *)(unsigned long)smp_processor_id()); \
register_cpu_notifier(&fn##_nb); \
} while (0)
#endif /* __KERNEL__ */
#endif /* _LINUX_PERF_EVENT_H */

24
include/linux/syscalls.h
View File

@ -105,18 +105,18 @@ struct perf_event_attr;
#ifdef CONFIG_PERF_EVENTS
#define TRACE_SYS_ENTER_PROFILE_INIT(sname) \
.profile_enable = prof_sysenter_enable, \
.profile_disable = prof_sysenter_disable,
#define TRACE_SYS_ENTER_PERF_INIT(sname) \
.perf_event_enable = perf_sysenter_enable, \
.perf_event_disable = perf_sysenter_disable,
#define TRACE_SYS_EXIT_PROFILE_INIT(sname) \
.profile_enable = prof_sysexit_enable, \
.profile_disable = prof_sysexit_disable,
#define TRACE_SYS_EXIT_PERF_INIT(sname) \
.perf_event_enable = perf_sysexit_enable, \
.perf_event_disable = perf_sysexit_disable,
#else
#define TRACE_SYS_ENTER_PROFILE(sname)
#define TRACE_SYS_ENTER_PROFILE_INIT(sname)
#define TRACE_SYS_EXIT_PROFILE(sname)
#define TRACE_SYS_EXIT_PROFILE_INIT(sname)
#define TRACE_SYS_ENTER_PERF(sname)
#define TRACE_SYS_ENTER_PERF_INIT(sname)
#define TRACE_SYS_EXIT_PERF(sname)
#define TRACE_SYS_EXIT_PERF_INIT(sname)
#endif /* CONFIG_PERF_EVENTS */
#ifdef CONFIG_FTRACE_SYSCALLS
@ -153,7 +153,7 @@ struct perf_event_attr;
.regfunc = reg_event_syscall_enter, \
.unregfunc = unreg_event_syscall_enter, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_ENTER_PROFILE_INIT(sname) \
TRACE_SYS_ENTER_PERF_INIT(sname) \
}
#define SYSCALL_TRACE_EXIT_EVENT(sname) \
@ -175,7 +175,7 @@ struct perf_event_attr;
.regfunc = reg_event_syscall_exit, \
.unregfunc = unreg_event_syscall_exit, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_EXIT_PROFILE_INIT(sname) \
TRACE_SYS_EXIT_PERF_INIT(sname) \
}
#define SYSCALL_METADATA(sname, nb) \

44
include/trace/ftrace.h
View File

@ -401,18 +401,18 @@ static inline notrace int ftrace_get_offsets_##call( \
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
\
static void ftrace_profile_##name(proto); \
static void perf_trace_##name(proto); \
\
static notrace int \
ftrace_profile_enable_##name(struct ftrace_event_call *unused) \
perf_trace_enable_##name(struct ftrace_event_call *unused) \
{ \
return register_trace_##name(ftrace_profile_##name); \
return register_trace_##name(perf_trace_##name); \
} \
\
static notrace void \
ftrace_profile_disable_##name(struct ftrace_event_call *unused) \
perf_trace_disable_##name(struct ftrace_event_call *unused) \
{ \
unregister_trace_##name(ftrace_profile_##name); \
unregister_trace_##name(perf_trace_##name); \
}
#undef DEFINE_EVENT_PRINT
@ -507,12 +507,12 @@ ftrace_profile_disable_##name(struct ftrace_event_call *unused) \
#ifdef CONFIG_PERF_EVENTS
#define _TRACE_PROFILE_INIT(call) \
.profile_enable = ftrace_profile_enable_##call, \
.profile_disable = ftrace_profile_disable_##call,
#define _TRACE_PERF_INIT(call) \
.perf_event_enable = perf_trace_enable_##call, \
.perf_event_disable = perf_trace_disable_##call,
#else
#define _TRACE_PROFILE_INIT(call)
#define _TRACE_PERF_INIT(call)
#endif /* CONFIG_PERF_EVENTS */
#undef __entry
@ -638,7 +638,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
.unregfunc = ftrace_raw_unreg_event_##call, \
.print_fmt = print_fmt_##template, \
.define_fields = ftrace_define_fields_##template, \
_TRACE_PROFILE_INIT(call) \
_TRACE_PERF_INIT(call) \
}
#undef DEFINE_EVENT_PRINT
@ -657,18 +657,18 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
.unregfunc = ftrace_raw_unreg_event_##call, \
.print_fmt = print_fmt_##call, \
.define_fields = ftrace_define_fields_##template, \
_TRACE_PROFILE_INIT(call) \
_TRACE_PERF_INIT(call) \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
* Define the insertion callback to profile events
* Define the insertion callback to perf events
*
* The job is very similar to ftrace_raw_event_<call> except that we don't
* insert in the ring buffer but in a perf counter.
*
* static void ftrace_profile_<call>(proto)
* static void ftrace_perf_<call>(proto)
* {
* struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
* struct ftrace_event_call *event_call = &event_<call>;
@ -757,13 +757,14 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static notrace void \
ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \
perf_trace_templ_##call(struct ftrace_event_call *event_call, \
proto) \
{ \
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
struct ftrace_raw_##call *entry; \
u64 __addr = 0, __count = 1; \
unsigned long irq_flags; \
struct pt_regs *__regs; \
int __entry_size; \
int __data_size; \
int rctx; \
@ -773,10 +774,10 @@ ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \
sizeof(u64)); \
__entry_size -= sizeof(u32); \
\
if (WARN_ONCE(__entry_size > FTRACE_MAX_PROFILE_SIZE, \
if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
"profile buffer not large enough")) \
return; \
entry = (struct ftrace_raw_##call *)ftrace_perf_buf_prepare( \
entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
__entry_size, event_call->id, &rctx, &irq_flags); \
if (!entry) \
return; \
@ -784,17 +785,20 @@ ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \
\
{ assign; } \
\
ftrace_perf_buf_submit(entry, __entry_size, rctx, __addr, \
__count, irq_flags); \
__regs = &__get_cpu_var(perf_trace_regs); \
perf_fetch_caller_regs(__regs, 2); \
\
perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
__count, irq_flags, __regs); \
}
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, call, proto, args) \
static notrace void ftrace_profile_##call(proto) \
static notrace void perf_trace_##call(proto) \
{ \
struct ftrace_event_call *event_call = &event_##call; \
\
ftrace_profile_templ_##template(event_call, args); \
perf_trace_templ_##template(event_call, args); \
}
#undef DEFINE_EVENT_PRINT

8
include/trace/syscall.h
View File

@ -47,10 +47,10 @@ enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
#endif
#ifdef CONFIG_PERF_EVENTS
int prof_sysenter_enable(struct ftrace_event_call *call);
void prof_sysenter_disable(struct ftrace_event_call *call);
int prof_sysexit_enable(struct ftrace_event_call *call);
void prof_sysexit_disable(struct ftrace_event_call *call);
int perf_sysenter_enable(struct ftrace_event_call *call);
void perf_sysenter_disable(struct ftrace_event_call *call);
int perf_sysexit_enable(struct ftrace_event_call *call);
void perf_sysexit_disable(struct ftrace_event_call *call);
#endif
#endif /* _TRACE_SYSCALL_H */

3
kernel/kprobes.c
View File

@ -259,7 +259,8 @@ static void __kprobes __free_insn_slot(struct kprobe_insn_cache *c,
struct kprobe_insn_page *kip;
list_for_each_entry(kip, &c->pages, list) {
long idx = ((long)slot - (long)kip->insns) / c->insn_size;
long idx = ((long)slot - (long)kip->insns) /
(c->insn_size * sizeof(kprobe_opcode_t));
if (idx >= 0 && idx < slots_per_page(c)) {
WARN_ON(kip->slot_used[idx] != SLOT_USED);
if (dirty) {

9
kernel/lockdep.c
View File

@ -3211,8 +3211,6 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
{
unsigned long flags;
trace_lock_acquire(lock, subclass, trylock, read, check, nest_lock, ip);
if (unlikely(current->lockdep_recursion))
return;
@ -3220,6 +3218,7 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
check_flags(flags);
current->lockdep_recursion = 1;
trace_lock_acquire(lock, subclass, trylock, read, check, nest_lock, ip);
__lock_acquire(lock, subclass, trylock, read, check,
irqs_disabled_flags(flags), nest_lock, ip, 0);
current->lockdep_recursion = 0;
@ -3232,14 +3231,13 @@ void lock_release(struct lockdep_map *lock, int nested,
{
unsigned long flags;
trace_lock_release(lock, nested, ip);
if (unlikely(current->lockdep_recursion))
return;
raw_local_irq_save(flags);
check_flags(flags);
current->lockdep_recursion = 1;
trace_lock_release(lock, nested, ip);
__lock_release(lock, nested, ip);
current->lockdep_recursion = 0;
raw_local_irq_restore(flags);
@ -3413,8 +3411,6 @@ void lock_contended(struct lockdep_map *lock, unsigned long ip)
{
unsigned long flags;
trace_lock_contended(lock, ip);
if (unlikely(!lock_stat))
return;
@ -3424,6 +3420,7 @@ void lock_contended(struct lockdep_map *lock, unsigned long ip)
raw_local_irq_save(flags);
check_flags(flags);
current->lockdep_recursion = 1;
trace_lock_contended(lock, ip);
__lock_contended(lock, ip);
current->lockdep_recursion = 0;
raw_local_irq_restore(flags);

84
kernel/perf_event.c
View File

@ -81,10 +81,6 @@ extern __weak const struct pmu *hw_perf_event_init(struct perf_event *event)
void __weak hw_perf_disable(void) { barrier(); }
void __weak hw_perf_enable(void) { barrier(); }
void __weak hw_perf_event_setup(int cpu) { barrier(); }
void __weak hw_perf_event_setup_online(int cpu) { barrier(); }
void __weak hw_perf_event_setup_offline(int cpu) { barrier(); }
int __weak
hw_perf_group_sched_in(struct perf_event *group_leader,
struct perf_cpu_context *cpuctx,
@ -97,25 +93,15 @@ void __weak perf_event_print_debug(void) { }
static DEFINE_PER_CPU(int, perf_disable_count);
void __perf_disable(void)
{
__get_cpu_var(perf_disable_count)++;
}
bool __perf_enable(void)
{
return !--__get_cpu_var(perf_disable_count);
}
void perf_disable(void)
{
__perf_disable();
hw_perf_disable();
if (!__get_cpu_var(perf_disable_count)++)
hw_perf_disable();
}
void perf_enable(void)
{
if (__perf_enable())
if (!--__get_cpu_var(perf_disable_count))
hw_perf_enable();
}
@ -1538,12 +1524,15 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
*/
if (interrupts == MAX_INTERRUPTS) {
perf_log_throttle(event, 1);
perf_disable();
event->pmu->unthrottle(event);
perf_enable();
}
if (!event->attr.freq || !event->attr.sample_freq)
continue;
perf_disable();
event->pmu->read(event);
now = atomic64_read(&event->count);
delta = now - hwc->freq_count_stamp;
@ -1551,6 +1540,7 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
if (delta > 0)
perf_adjust_period(event, TICK_NSEC, delta);
perf_enable();
}
raw_spin_unlock(&ctx->lock);
}
@ -1560,9 +1550,6 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
*/
static void rotate_ctx(struct perf_event_context *ctx)
{
if (!ctx->nr_events)
return;
raw_spin_lock(&ctx->lock);
/* Rotate the first entry last of non-pinned groups */
@ -1575,19 +1562,28 @@ void perf_event_task_tick(struct task_struct *curr)
{
struct perf_cpu_context *cpuctx;
struct perf_event_context *ctx;
int rotate = 0;
if (!atomic_read(&nr_events))
return;
cpuctx = &__get_cpu_var(perf_cpu_context);
ctx = curr->perf_event_ctxp;
if (cpuctx->ctx.nr_events &&
cpuctx->ctx.nr_events != cpuctx->ctx.nr_active)
rotate = 1;
perf_disable();
ctx = curr->perf_event_ctxp;
if (ctx && ctx->nr_events && ctx->nr_events != ctx->nr_active)
rotate = 1;
perf_ctx_adjust_freq(&cpuctx->ctx);
if (ctx)
perf_ctx_adjust_freq(ctx);
if (!rotate)
return;
perf_disable();
cpu_ctx_sched_out(cpuctx, EVENT_FLEXIBLE);
if (ctx)
task_ctx_sched_out(ctx, EVENT_FLEXIBLE);
@ -1599,7 +1595,6 @@ void perf_event_task_tick(struct task_struct *curr)
cpu_ctx_sched_in(cpuctx, EVENT_FLEXIBLE);
if (ctx)
task_ctx_sched_in(curr, EVENT_FLEXIBLE);
perf_enable();
}
@ -2791,6 +2786,13 @@ __weak struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
return NULL;
}
#ifdef CONFIG_EVENT_TRACING
__weak
void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
{
}
#endif
/*
* Output
*/
@ -4318,9 +4320,8 @@ static const struct pmu perf_ops_task_clock = {
#ifdef CONFIG_EVENT_TRACING
void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
int entry_size)
int entry_size, struct pt_regs *regs)
{
struct pt_regs *regs = get_irq_regs();
struct perf_sample_data data;
struct perf_raw_record raw = {
.size = entry_size,
@ -4330,12 +4331,9 @@ void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
perf_sample_data_init(&data, addr);
data.raw = &raw;
if (!regs)
regs = task_pt_regs(current);
/* Trace events already protected against recursion */
do_perf_sw_event(PERF_TYPE_TRACEPOINT, event_id, count, 1,
&data, regs);
&data, regs);
}
EXPORT_SYMBOL_GPL(perf_tp_event);
@ -4351,7 +4349,7 @@ static int perf_tp_event_match(struct perf_event *event,
static void tp_perf_event_destroy(struct perf_event *event)
{
ftrace_profile_disable(event->attr.config);
perf_trace_disable(event->attr.config);
}
static const struct pmu *tp_perf_event_init(struct perf_event *event)
@ -4365,7 +4363,7 @@ static const struct pmu *tp_perf_event_init(struct perf_event *event)
!capable(CAP_SYS_ADMIN))
return ERR_PTR(-EPERM);
if (ftrace_profile_enable(event->attr.config))
if (perf_trace_enable(event->attr.config))
return NULL;
event->destroy = tp_perf_event_destroy;
@ -5372,18 +5370,26 @@ int perf_event_init_task(struct task_struct *child)
return ret;
}
static void __init perf_event_init_all_cpus(void)
{
int cpu;
struct perf_cpu_context *cpuctx;
for_each_possible_cpu(cpu) {
cpuctx = &per_cpu(perf_cpu_context, cpu);
__perf_event_init_context(&cpuctx->ctx, NULL);
}
}
static void __cpuinit perf_event_init_cpu(int cpu)
{
struct perf_cpu_context *cpuctx;
cpuctx = &per_cpu(perf_cpu_context, cpu);
__perf_event_init_context(&cpuctx->ctx, NULL);
spin_lock(&perf_resource_lock);
cpuctx->max_pertask = perf_max_events - perf_reserved_percpu;
spin_unlock(&perf_resource_lock);
hw_perf_event_setup(cpu);
}
#ifdef CONFIG_HOTPLUG_CPU
@ -5423,20 +5429,11 @@ perf_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
perf_event_init_cpu(cpu);
break;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
hw_perf_event_setup_online(cpu);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
perf_event_exit_cpu(cpu);
break;
case CPU_DEAD:
hw_perf_event_setup_offline(cpu);
break;
default:
break;
}
@ -5454,6 +5451,7 @@ static struct notifier_block __cpuinitdata perf_cpu_nb = {
void __init perf_event_init(void)
{
perf_event_init_all_cpus();
perf_cpu_notify(&perf_cpu_nb, (unsigned long)CPU_UP_PREPARE,
(void *)(long)smp_processor_id());
perf_cpu_notify(&perf_cpu_nb, (unsigned long)CPU_ONLINE,

2
kernel/trace/Makefile
View File

@ -52,7 +52,7 @@ obj-$(CONFIG_EVENT_TRACING) += trace_events.o
obj-$(CONFIG_EVENT_TRACING) += trace_export.o
obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
ifeq ($(CONFIG_PERF_EVENTS),y)
obj-$(CONFIG_EVENT_TRACING) += trace_event_profile.o
obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o
endif
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o

50
kernel/trace/trace_event_profile.c → kernel/trace/trace_event_perf.c
View File

@ -1,32 +1,36 @@
/*
* trace event based perf counter profiling
* trace event based perf event profiling/tracing
*
* Copyright (C) 2009 Red Hat Inc, Peter Zijlstra <pzijlstr@redhat.com>
*
* Copyright (C) 2009-2010 Frederic Weisbecker <fweisbec@gmail.com>
*/
#include <linux/module.h>
#include <linux/kprobes.h>
#include "trace.h"
DEFINE_PER_CPU(struct pt_regs, perf_trace_regs);
EXPORT_PER_CPU_SYMBOL_GPL(perf_trace_regs);
EXPORT_SYMBOL_GPL(perf_arch_fetch_caller_regs);
static char *perf_trace_buf;
static char *perf_trace_buf_nmi;
typedef typeof(char [FTRACE_MAX_PROFILE_SIZE]) perf_trace_t ;
typedef typeof(char [PERF_MAX_TRACE_SIZE]) perf_trace_t ;
/* Count the events in use (per event id, not per instance) */
static int total_profile_count;
static int total_ref_count;
static int ftrace_profile_enable_event(struct ftrace_event_call *event)
static int perf_trace_event_enable(struct ftrace_event_call *event)
{
char *buf;
int ret = -ENOMEM;
if (event->profile_count++ > 0)
if (event->perf_refcount++ > 0)
return 0;
if (!total_profile_count) {
if (!total_ref_count) {
buf = (char *)alloc_percpu(perf_trace_t);
if (!buf)
goto fail_buf;
@ -40,35 +44,35 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
rcu_assign_pointer(perf_trace_buf_nmi, buf);
}
ret = event->profile_enable(event);
ret = event->perf_event_enable(event);
if (!ret) {
total_profile_count++;
total_ref_count++;
return 0;
}
fail_buf_nmi:
if (!total_profile_count) {
if (!total_ref_count) {
free_percpu(perf_trace_buf_nmi);
free_percpu(perf_trace_buf);
perf_trace_buf_nmi = NULL;
perf_trace_buf = NULL;
}
fail_buf:
event->profile_count--;
event->perf_refcount--;
return ret;
}
int ftrace_profile_enable(int event_id)
int perf_trace_enable(int event_id)
{
struct ftrace_event_call *event;
int ret = -EINVAL;
mutex_lock(&event_mutex);
list_for_each_entry(event, &ftrace_events, list) {
if (event->id == event_id && event->profile_enable &&
if (event->id == event_id && event->perf_event_enable &&
try_module_get(event->mod)) {
ret = ftrace_profile_enable_event(event);
ret = perf_trace_event_enable(event);
break;
}
}
@ -77,16 +81,16 @@ int ftrace_profile_enable(int event_id)
return ret;
}
static void ftrace_profile_disable_event(struct ftrace_event_call *event)
static void perf_trace_event_disable(struct ftrace_event_call *event)
{
char *buf, *nmi_buf;
if (--event->profile_count > 0)
if (--event->perf_refcount > 0)
return;
event->profile_disable(event);
event->perf_event_disable(event);
if (!--total_profile_count) {
if (!--total_ref_count) {
buf = perf_trace_buf;
rcu_assign_pointer(perf_trace_buf, NULL);
@ -104,14 +108,14 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
}
}
void ftrace_profile_disable(int event_id)
void perf_trace_disable(int event_id)
{
struct ftrace_event_call *event;
mutex_lock(&event_mutex);
list_for_each_entry(event, &ftrace_events, list) {
if (event->id == event_id) {
ftrace_profile_disable_event(event);
perf_trace_event_disable(event);
module_put(event->mod);
break;
}
@ -119,8 +123,8 @@ void ftrace_profile_disable(int event_id)
mutex_unlock(&event_mutex);
}
__kprobes void *ftrace_perf_buf_prepare(int size, unsigned short type,
int *rctxp, unsigned long *irq_flags)
__kprobes void *perf_trace_buf_prepare(int size, unsigned short type,
int *rctxp, unsigned long *irq_flags)
{
struct trace_entry *entry;
char *trace_buf, *raw_data;
@ -161,4 +165,4 @@ __kprobes void *ftrace_perf_buf_prepare(int size, unsigned short type,
local_irq_restore(*irq_flags);
return NULL;
}
EXPORT_SYMBOL_GPL(ftrace_perf_buf_prepare);
EXPORT_SYMBOL_GPL(perf_trace_buf_prepare);

2
kernel/trace/trace_events.c
View File

@ -938,7 +938,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
trace_create_file("enable", 0644, call->dir, call,
enable);
if (call->id && call->profile_enable)
if (call->id && call->perf_event_enable)
trace_create_file("id", 0444, call->dir, call,
id);

29
kernel/trace/trace_kprobe.c
View File

@ -1214,7 +1214,7 @@ static int set_print_fmt(struct trace_probe *tp)
#ifdef CONFIG_PERF_EVENTS
/* Kprobe profile handler */
static __kprobes void kprobe_profile_func(struct kprobe *kp,
static __kprobes void kprobe_perf_func(struct kprobe *kp,
struct pt_regs *regs)
{
struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
@ -1227,11 +1227,11 @@ static __kprobes void kprobe_profile_func(struct kprobe *kp,
__size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args);
size = ALIGN(__size + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"profile buffer not large enough"))
return;
entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
if (!entry)
return;
@ -1240,11 +1240,11 @@ static __kprobes void kprobe_profile_func(struct kprobe *kp,
for (i = 0; i < tp->nr_args; i++)
entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
ftrace_perf_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags);
perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs);
}
/* Kretprobe profile handler */
static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
@ -1257,11 +1257,11 @@ static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
__size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args);
size = ALIGN(__size + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"profile buffer not large enough"))
return;
entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
if (!entry)
return;
@ -1271,10 +1271,11 @@ static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
for (i = 0; i < tp->nr_args; i++)
entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
ftrace_perf_buf_submit(entry, size, rctx, entry->ret_ip, 1, irq_flags);
perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1,
irq_flags, regs);
}
static int probe_profile_enable(struct ftrace_event_call *call)
static int probe_perf_enable(struct ftrace_event_call *call)
{
struct trace_probe *tp = (struct trace_probe *)call->data;
@ -1286,7 +1287,7 @@ static int probe_profile_enable(struct ftrace_event_call *call)
return enable_kprobe(&tp->rp.kp);
}
static void probe_profile_disable(struct ftrace_event_call *call)
static void probe_perf_disable(struct ftrace_event_call *call)
{
struct trace_probe *tp = (struct trace_probe *)call->data;
@ -1311,7 +1312,7 @@ int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs)
kprobe_trace_func(kp, regs);
#ifdef CONFIG_PERF_EVENTS
if (tp->flags & TP_FLAG_PROFILE)
kprobe_profile_func(kp, regs);
kprobe_perf_func(kp, regs);
#endif
return 0; /* We don't tweek kernel, so just return 0 */
}
@ -1325,7 +1326,7 @@ int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs)
kretprobe_trace_func(ri, regs);
#ifdef CONFIG_PERF_EVENTS
if (tp->flags & TP_FLAG_PROFILE)
kretprobe_profile_func(ri, regs);
kretprobe_perf_func(ri, regs);
#endif
return 0; /* We don't tweek kernel, so just return 0 */
}
@ -1358,8 +1359,8 @@ static int register_probe_event(struct trace_probe *tp)
call->unregfunc = probe_event_disable;
#ifdef CONFIG_PERF_EVENTS
call->profile_enable = probe_profile_enable;
call->profile_disable = probe_profile_disable;
call->perf_event_enable = probe_perf_enable;
call->perf_event_disable = probe_perf_disable;
#endif
call->data = tp;
ret = trace_add_event_call(call);

72
kernel/trace/trace_syscalls.c
View File

@ -428,12 +428,12 @@ core_initcall(init_ftrace_syscalls);
#ifdef CONFIG_PERF_EVENTS
static DECLARE_BITMAP(enabled_prof_enter_syscalls, NR_syscalls);
static DECLARE_BITMAP(enabled_prof_exit_syscalls, NR_syscalls);
static int sys_prof_refcount_enter;
static int sys_prof_refcount_exit;
static DECLARE_BITMAP(enabled_perf_enter_syscalls, NR_syscalls);
static DECLARE_BITMAP(enabled_perf_exit_syscalls, NR_syscalls);
static int sys_perf_refcount_enter;
static int sys_perf_refcount_exit;
static void prof_syscall_enter(struct pt_regs *regs, long id)
static void perf_syscall_enter(struct pt_regs *regs, long id)
{
struct syscall_metadata *sys_data;
struct syscall_trace_enter *rec;
@ -443,7 +443,7 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
int size;
syscall_nr = syscall_get_nr(current, regs);
if (!test_bit(syscall_nr, enabled_prof_enter_syscalls))
if (!test_bit(syscall_nr, enabled_perf_enter_syscalls))
return;
sys_data = syscall_nr_to_meta(syscall_nr);
@ -455,11 +455,11 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
size = ALIGN(size + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
"profile buffer not large enough"))
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"perf buffer not large enough"))
return;
rec = (struct syscall_trace_enter *)ftrace_perf_buf_prepare(size,
rec = (struct syscall_trace_enter *)perf_trace_buf_prepare(size,
sys_data->enter_event->id, &rctx, &flags);
if (!rec)
return;
@ -467,10 +467,10 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
rec->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args,
(unsigned long *)&rec->args);
ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs);
}
int prof_sysenter_enable(struct ftrace_event_call *call)
int perf_sysenter_enable(struct ftrace_event_call *call)
{
int ret = 0;
int num;
@ -478,34 +478,34 @@ int prof_sysenter_enable(struct ftrace_event_call *call)
num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_enter)
ret = register_trace_sys_enter(prof_syscall_enter);
if (!sys_perf_refcount_enter)
ret = register_trace_sys_enter(perf_syscall_enter);
if (ret) {
pr_info("event trace: Could not activate"
"syscall entry trace point");
} else {
set_bit(num, enabled_prof_enter_syscalls);
sys_prof_refcount_enter++;
set_bit(num, enabled_perf_enter_syscalls);
sys_perf_refcount_enter++;
}
mutex_unlock(&syscall_trace_lock);
return ret;
}
void prof_sysenter_disable(struct ftrace_event_call *call)
void perf_sysenter_disable(struct ftrace_event_call *call)
{
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
sys_prof_refcount_enter--;
clear_bit(num, enabled_prof_enter_syscalls);
if (!sys_prof_refcount_enter)
unregister_trace_sys_enter(prof_syscall_enter);
sys_perf_refcount_enter--;
clear_bit(num, enabled_perf_enter_syscalls);
if (!sys_perf_refcount_enter)
unregister_trace_sys_enter(perf_syscall_enter);
mutex_unlock(&syscall_trace_lock);
}
static void prof_syscall_exit(struct pt_regs *regs, long ret)
static void perf_syscall_exit(struct pt_regs *regs, long ret)
{
struct syscall_metadata *sys_data;
struct syscall_trace_exit *rec;
@ -515,7 +515,7 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
int size;
syscall_nr = syscall_get_nr(current, regs);
if (!test_bit(syscall_nr, enabled_prof_exit_syscalls))
if (!test_bit(syscall_nr, enabled_perf_exit_syscalls))
return;
sys_data = syscall_nr_to_meta(syscall_nr);
@ -530,11 +530,11 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
* Impossible, but be paranoid with the future
* How to put this check outside runtime?
*/
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
"exit event has grown above profile buffer size"))
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"exit event has grown above perf buffer size"))
return;
rec = (struct syscall_trace_exit *)ftrace_perf_buf_prepare(size,
rec = (struct syscall_trace_exit *)perf_trace_buf_prepare(size,
sys_data->exit_event->id, &rctx, &flags);
if (!rec)
return;
@ -542,10 +542,10 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
rec->nr = syscall_nr;
rec->ret = syscall_get_return_value(current, regs);
ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs);
}
int prof_sysexit_enable(struct ftrace_event_call *call)
int perf_sysexit_enable(struct ftrace_event_call *call)
{
int ret = 0;
int num;
@ -553,30 +553,30 @@ int prof_sysexit_enable(struct ftrace_event_call *call)
num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_exit)
ret = register_trace_sys_exit(prof_syscall_exit);
if (!sys_perf_refcount_exit)
ret = register_trace_sys_exit(perf_syscall_exit);
if (ret) {
pr_info("event trace: Could not activate"
"syscall exit trace point");
} else {
set_bit(num, enabled_prof_exit_syscalls);
sys_prof_refcount_exit++;
set_bit(num, enabled_perf_exit_syscalls);
sys_perf_refcount_exit++;
}
mutex_unlock(&syscall_trace_lock);
return ret;
}
void prof_sysexit_disable(struct ftrace_event_call *call)
void perf_sysexit_disable(struct ftrace_event_call *call)
{
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
sys_prof_refcount_exit--;
clear_bit(num, enabled_prof_exit_syscalls);
if (!sys_prof_refcount_exit)
unregister_trace_sys_exit(prof_syscall_exit);
sys_perf_refcount_exit--;
clear_bit(num, enabled_perf_exit_syscalls);
if (!sys_perf_refcount_exit)
unregister_trace_sys_exit(perf_syscall_exit);
mutex_unlock(&syscall_trace_lock);
}

4
tools/perf/Documentation/Makefile
View File

@ -24,7 +24,10 @@ DOC_MAN1=$(patsubst %.txt,%.1,$(MAN1_TXT))
DOC_MAN5=$(patsubst %.txt,%.5,$(MAN5_TXT))
DOC_MAN7=$(patsubst %.txt,%.7,$(MAN7_TXT))
# Make the path relative to DESTDIR, not prefix
ifndef DESTDIR
prefix?=$(HOME)
endif
bindir?=$(prefix)/bin
htmldir?=$(prefix)/share/doc/perf-doc
pdfdir?=$(prefix)/share/doc/perf-doc
@ -32,7 +35,6 @@ mandir?=$(prefix)/share/man
man1dir=$(mandir)/man1
man5dir=$(mandir)/man5
man7dir=$(mandir)/man7
# DESTDIR=
ASCIIDOC=asciidoc
ASCIIDOC_EXTRA = --unsafe

6
tools/perf/Makefile
View File

@ -216,7 +216,10 @@ STRIP ?= strip
# runtime figures out where they are based on the path to the executable.
# This can help installing the suite in a relocatable way.
# Make the path relative to DESTDIR, not to prefix
ifndef DESTDIR
prefix = $(HOME)
endif
bindir_relative = bin
bindir = $(prefix)/$(bindir_relative)
mandir = share/man
@ -233,7 +236,6 @@ sysconfdir = $(prefix)/etc
ETC_PERFCONFIG = etc/perfconfig
endif
lib = lib
# DESTDIR=
export prefix bindir sharedir sysconfdir
@ -387,6 +389,7 @@ LIB_H += util/thread.h
LIB_H += util/trace-event.h
LIB_H += util/probe-finder.h
LIB_H += util/probe-event.h
LIB_H += util/cpumap.h
LIB_OBJS += util/abspath.o
LIB_OBJS += util/alias.o
@ -433,6 +436,7 @@ LIB_OBJS += util/sort.o
LIB_OBJS += util/hist.o
LIB_OBJS += util/probe-event.o
LIB_OBJS += util/util.o
LIB_OBJS += util/cpumap.o
BUILTIN_OBJS += builtin-annotate.o

6
tools/perf/builtin-annotate.c
View File

@ -116,7 +116,7 @@ static int perf_session__add_hist_entry(struct perf_session *self,
return 0;
}
he = __perf_session__add_hist_entry(self, al, NULL, count, &hit);
he = __perf_session__add_hist_entry(&self->hists, al, NULL, count, &hit);
if (he == NULL)
return -ENOMEM;
@ -564,8 +564,8 @@ static int __cmd_annotate(void)
if (verbose > 2)
dsos__fprintf(stdout);
perf_session__collapse_resort(session);
perf_session__output_resort(session, session->event_total[0]);
perf_session__collapse_resort(&session->hists);
perf_session__output_resort(&session->hists, session->event_total[0]);
perf_session__find_annotations(session);
out_delete:
perf_session__delete(session);

13
tools/perf/builtin-diff.c
View File

@ -26,7 +26,8 @@ static int perf_session__add_hist_entry(struct perf_session *self,
struct addr_location *al, u64 count)
{
bool hit;
struct hist_entry *he = __perf_session__add_hist_entry(self, al, NULL,
struct hist_entry *he = __perf_session__add_hist_entry(&self->hists,
al, NULL,
count, &hit);
if (he == NULL)
return -ENOMEM;
@ -114,7 +115,7 @@ static void perf_session__resort_hist_entries(struct perf_session *self)
static void perf_session__set_hist_entries_positions(struct perf_session *self)
{
perf_session__output_resort(self, self->events_stats.total);
perf_session__output_resort(&self->hists, self->events_stats.total);
perf_session__resort_hist_entries(self);
}
@ -166,13 +167,15 @@ static int __cmd_diff(void)
goto out_delete;
}
perf_session__output_resort(session[1], session[1]->events_stats.total);
perf_session__output_resort(&session[1]->hists,
session[1]->events_stats.total);
if (show_displacement)
perf_session__set_hist_entries_positions(session[0]);
perf_session__match_hists(session[0], session[1]);
perf_session__fprintf_hists(session[1], session[0],
show_displacement, stdout);
perf_session__fprintf_hists(&session[1]->hists, session[0],
show_displacement, stdout,
session[1]->events_stats.total);
out_delete:
for (i = 0; i < 2; ++i)
perf_session__delete(session[i]);

13
tools/perf/builtin-record.c
View File

@ -22,6 +22,7 @@
#include "util/debug.h"
#include "util/session.h"
#include "util/symbol.h"
#include "util/cpumap.h"
#include <unistd.h>
#include <sched.h>
@ -244,6 +245,9 @@ static void create_counter(int counter, int cpu, pid_t pid)
attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
if (nr_counters > 1)
attr->sample_type |= PERF_SAMPLE_ID;
if (freq) {
attr->sample_type |= PERF_SAMPLE_PERIOD;
attr->freq = 1;
@ -391,6 +395,9 @@ static int process_buildids(void)
{
u64 size = lseek(output, 0, SEEK_CUR);
if (size == 0)
return 0;
session->fd = output;
return __perf_session__process_events(session, post_processing_offset,
size - post_processing_offset,
@ -418,9 +425,6 @@ static int __cmd_record(int argc, const char **argv)
char buf;
page_size = sysconf(_SC_PAGE_SIZE);
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert(nr_cpus >= 0);
atexit(sig_atexit);
signal(SIGCHLD, sig_handler);
@ -544,8 +548,9 @@ static int __cmd_record(int argc, const char **argv)
if ((!system_wide && !inherit) || profile_cpu != -1) {
open_counters(profile_cpu, target_pid);
} else {
nr_cpus = read_cpu_map();
for (i = 0; i < nr_cpus; i++)
open_counters(i, target_pid);
open_counters(cpumap[i], target_pid);
}
if (file_new) {

112
tools/perf/builtin-report.c
View File

@ -45,28 +45,71 @@ static char *pretty_printing_style = default_pretty_printing_style;
static char callchain_default_opt[] = "fractal,0.5";
static struct event_stat_id *get_stats(struct perf_session *self,
u64 event_stream, u32 type, u64 config)
{
struct rb_node **p = &self->stats_by_id.rb_node;
struct rb_node *parent = NULL;
struct event_stat_id *iter, *new;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct event_stat_id, rb_node);
if (iter->config == config)
return iter;
if (config > iter->config)
p = &(*p)->rb_right;
else
p = &(*p)->rb_left;
}
new = malloc(sizeof(struct event_stat_id));
if (new == NULL)
return NULL;
memset(new, 0, sizeof(struct event_stat_id));
new->event_stream = event_stream;
new->config = config;
new->type = type;
rb_link_node(&new->rb_node, parent, p);
rb_insert_color(&new->rb_node, &self->stats_by_id);
return new;
}
static int perf_session__add_hist_entry(struct perf_session *self,
struct addr_location *al,
struct ip_callchain *chain, u64 count)
struct sample_data *data)
{
struct symbol **syms = NULL, *parent = NULL;
bool hit;
struct hist_entry *he;
struct event_stat_id *stats;
struct perf_event_attr *attr;
if ((sort__has_parent || symbol_conf.use_callchain) && chain)
if ((sort__has_parent || symbol_conf.use_callchain) && data->callchain)
syms = perf_session__resolve_callchain(self, al->thread,
chain, &parent);
he = __perf_session__add_hist_entry(self, al, parent, count, &hit);
data->callchain, &parent);
attr = perf_header__find_attr(data->id, &self->header);
if (attr)
stats = get_stats(self, data->id, attr->type, attr->config);
else
stats = get_stats(self, data->id, 0, 0);
if (stats == NULL)
return -ENOMEM;
he = __perf_session__add_hist_entry(&stats->hists, al, parent,
data->period, &hit);
if (he == NULL)
return -ENOMEM;
if (hit)
he->count += count;
he->count += data->period;
if (symbol_conf.use_callchain) {
if (!hit)
callchain_init(&he->callchain);
append_chain(&he->callchain, chain, syms);
append_chain(&he->callchain, data->callchain, syms);
free(syms);
}
@ -86,10 +129,30 @@ static int validate_chain(struct ip_callchain *chain, event_t *event)
return 0;
}
static int add_event_total(struct perf_session *session,
struct sample_data *data,
struct perf_event_attr *attr)
{
struct event_stat_id *stats;
if (attr)
stats = get_stats(session, data->id, attr->type, attr->config);
else
stats = get_stats(session, data->id, 0, 0);
if (!stats)
return -ENOMEM;
stats->stats.total += data->period;
session->events_stats.total += data->period;
return 0;
}
static int process_sample_event(event_t *event, struct perf_session *session)
{
struct sample_data data = { .period = 1, };
struct addr_location al;
struct perf_event_attr *attr;
event__parse_sample(event, session->sample_type, &data);
@ -123,12 +186,18 @@ static int process_sample_event(event_t *event, struct perf_session *session)
if (al.filtered || (hide_unresolved && al.sym == NULL))
return 0;
if (perf_session__add_hist_entry(session, &al, data.callchain, data.period)) {
if (perf_session__add_hist_entry(session, &al, &data)) {
pr_debug("problem incrementing symbol count, skipping event\n");
return -1;
}
session->events_stats.total += data.period;
attr = perf_header__find_attr(data.id, &session->header);
if (add_event_total(session, &data, attr)) {
pr_debug("problem adding event count\n");
return -1;
}
return 0;
}
@ -197,6 +266,7 @@ static int __cmd_report(void)
{
int ret = -EINVAL;
struct perf_session *session;
struct rb_node *next;
session = perf_session__new(input_name, O_RDONLY, force);
if (session == NULL)
@ -224,10 +294,28 @@ static int __cmd_report(void)
if (verbose > 2)
dsos__fprintf(stdout);
perf_session__collapse_resort(session);
perf_session__output_resort(session, session->events_stats.total);
fprintf(stdout, "# Samples: %Ld\n#\n", session->events_stats.total);
perf_session__fprintf_hists(session, NULL, false, stdout);
next = rb_first(&session->stats_by_id);
while (next) {
struct event_stat_id *stats;
stats = rb_entry(next, struct event_stat_id, rb_node);
perf_session__collapse_resort(&stats->hists);
perf_session__output_resort(&stats->hists, stats->stats.total);
if (rb_first(&session->stats_by_id) ==
rb_last(&session->stats_by_id))
fprintf(stdout, "# Samples: %Ld\n#\n",
stats->stats.total);
else
fprintf(stdout, "# Samples: %Ld %s\n#\n",
stats->stats.total,
__event_name(stats->type, stats->config));
perf_session__fprintf_hists(&stats->hists, NULL, false, stdout,
stats->stats.total);
fprintf(stdout, "\n\n");
next = rb_next(&stats->rb_node);
}
if (sort_order == default_sort_order &&
parent_pattern == default_parent_pattern)
fprintf(stdout, "#\n# (For a higher level overview, try: perf report --sort comm,dso)\n#\n");

10
tools/perf/builtin-stat.c
View File

@ -45,6 +45,7 @@
#include "util/event.h"
#include "util/debug.h"
#include "util/header.h"
#include "util/cpumap.h"
#include <sys/prctl.h>
#include <math.h>
@ -151,7 +152,7 @@ static void create_perf_stat_counter(int counter, int pid)
unsigned int cpu;
for (cpu = 0; cpu < nr_cpus; cpu++) {
fd[cpu][counter] = sys_perf_event_open(attr, -1, cpu, -1, 0);
fd[cpu][counter] = sys_perf_event_open(attr, -1, cpumap[cpu], -1, 0);
if (fd[cpu][counter] < 0 && verbose)
fprintf(stderr, ERR_PERF_OPEN, counter,
fd[cpu][counter], strerror(errno));
@ -519,9 +520,10 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
nr_counters = ARRAY_SIZE(default_attrs);
}
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert((int)nr_cpus >= 0);
if (system_wide)
nr_cpus = read_cpu_map();
else
nr_cpus = 1;
/*
* We dont want to block the signals - that would cause

9
tools/perf/builtin-top.c
View File

@ -28,6 +28,7 @@
#include <linux/rbtree.h>
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/cpumap.h"
#include "util/debug.h"
@ -1123,7 +1124,7 @@ static void start_counter(int i, int counter)
cpu = profile_cpu;
if (target_pid == -1 && profile_cpu == -1)
cpu = i;
cpu = cpumap[i];
attr = attrs + counter;
@ -1347,12 +1348,10 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
attrs[counter].sample_period = default_interval;
}
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert(nr_cpus >= 0);
if (target_pid != -1 || profile_cpu != -1)
nr_cpus = 1;
else
nr_cpus = read_cpu_map();
get_term_dimensions(&winsize);
if (print_entries == 0) {

59
tools/perf/util/cpumap.c Normal file
View File

@ -0,0 +1,59 @@
#include "util.h"
#include "../perf.h"
#include "cpumap.h"
#include <assert.h>
#include <stdio.h>
int cpumap[MAX_NR_CPUS];
static int default_cpu_map(void)
{
int nr_cpus, i;
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert((int)nr_cpus >= 0);
for (i = 0; i < nr_cpus; ++i)
cpumap[i] = i;
return nr_cpus;
}
int read_cpu_map(void)
{
FILE *onlnf;
int nr_cpus = 0;
int n, cpu, prev;
char sep;
onlnf = fopen("/sys/devices/system/cpu/online", "r");
if (!onlnf)
return default_cpu_map();
sep = 0;
prev = -1;
for (;;) {
n = fscanf(onlnf, "%u%c", &cpu, &sep);
if (n <= 0)
break;
if (prev >= 0) {
assert(nr_cpus + cpu - prev - 1 < MAX_NR_CPUS);
while (++prev < cpu)
cpumap[nr_cpus++] = prev;
}
assert (nr_cpus < MAX_NR_CPUS);
cpumap[nr_cpus++] = cpu;
if (n == 2 && sep == '-')
prev = cpu;
else
prev = -1;
if (n == 1 || sep == '\n')
break;
}
fclose(onlnf);
if (nr_cpus > 0)
return nr_cpus;
return default_cpu_map();
}

7
tools/perf/util/cpumap.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef __PERF_CPUMAP_H
#define __PERF_CPUMAP_H
extern int read_cpu_map(void);
extern int cpumap[];
#endif /* __PERF_CPUMAP_H */

9
tools/perf/util/event.h
View File

@ -99,6 +99,15 @@ struct events_stats {
u64 lost;
};
struct event_stat_id {
struct rb_node rb_node;
struct rb_root hists;
struct events_stats stats;
u64 config;
u64 event_stream;
u32 type;
};
void event__print_totals(void);
struct perf_session;

50
tools/perf/util/hist.c
View File

@ -12,12 +12,12 @@ struct callchain_param callchain_param = {
* histogram, sorted on item, collects counts
*/
struct hist_entry *__perf_session__add_hist_entry(struct perf_session *self,
struct hist_entry *__perf_session__add_hist_entry(struct rb_root *hists,
struct addr_location *al,
struct symbol *sym_parent,
u64 count, bool *hit)
{
struct rb_node **p = &self->hists.rb_node;
struct rb_node **p = &hists->rb_node;
struct rb_node *parent = NULL;
struct hist_entry *he;
struct hist_entry entry = {
@ -53,7 +53,7 @@ struct hist_entry *__perf_session__add_hist_entry(struct perf_session *self,
return NULL;
*he = entry;
rb_link_node(&he->rb_node, parent, p);
rb_insert_color(&he->rb_node, &self->hists);
rb_insert_color(&he->rb_node, hists);
*hit = false;
return he;
}
@ -130,7 +130,7 @@ static void collapse__insert_entry(struct rb_root *root, struct hist_entry *he)
rb_insert_color(&he->rb_node, root);
}
void perf_session__collapse_resort(struct perf_session *self)
void perf_session__collapse_resort(struct rb_root *hists)
{
struct rb_root tmp;
struct rb_node *next;
@ -140,17 +140,17 @@ void perf_session__collapse_resort(struct perf_session *self)
return;
tmp = RB_ROOT;
next = rb_first(&self->hists);
next = rb_first(hists);
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
rb_erase(&n->rb_node, &self->hists);
rb_erase(&n->rb_node, hists);
collapse__insert_entry(&tmp, n);
}
self->hists = tmp;
*hists = tmp;
}
/*
@ -183,7 +183,7 @@ static void perf_session__insert_output_hist_entry(struct rb_root *root,
rb_insert_color(&he->rb_node, root);
}
void perf_session__output_resort(struct perf_session *self, u64 total_samples)
void perf_session__output_resort(struct rb_root *hists, u64 total_samples)
{
struct rb_root tmp;
struct rb_node *next;
@ -194,18 +194,18 @@ void perf_session__output_resort(struct perf_session *self, u64 total_samples)
total_samples * (callchain_param.min_percent / 100);
tmp = RB_ROOT;
next = rb_first(&self->hists);
next = rb_first(hists);
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
rb_erase(&n->rb_node, &self->hists);
rb_erase(&n->rb_node, hists);
perf_session__insert_output_hist_entry(&tmp, n,
min_callchain_hits);
}
self->hists = tmp;
*hists = tmp;
}
static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
@ -456,10 +456,10 @@ static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
}
static size_t hist_entry__fprintf(struct hist_entry *self,
struct perf_session *session,
struct perf_session *pair_session,
bool show_displacement,
long displacement, FILE *fp)
long displacement, FILE *fp,
u64 session_total)
{
struct sort_entry *se;
u64 count, total;
@ -474,7 +474,7 @@ static size_t hist_entry__fprintf(struct hist_entry *self,
total = pair_session->events_stats.total;
} else {
count = self->count;
total = session->events_stats.total;
total = session_total;
}
if (total)
@ -496,8 +496,8 @@ static size_t hist_entry__fprintf(struct hist_entry *self,
if (total > 0)
old_percent = (count * 100.0) / total;
if (session->events_stats.total > 0)
new_percent = (self->count * 100.0) / session->events_stats.total;
if (session_total > 0)
new_percent = (self->count * 100.0) / session_total;
diff = new_percent - old_percent;
@ -544,16 +544,17 @@ static size_t hist_entry__fprintf(struct hist_entry *self,
left_margin -= thread__comm_len(self->thread);
}
hist_entry_callchain__fprintf(fp, self, session->events_stats.total,
hist_entry_callchain__fprintf(fp, self, session_total,
left_margin);
}
return ret;
}
size_t perf_session__fprintf_hists(struct perf_session *self,
size_t perf_session__fprintf_hists(struct rb_root *hists,
struct perf_session *pair,
bool show_displacement, FILE *fp)
bool show_displacement, FILE *fp,
u64 session_total)
{
struct sort_entry *se;
struct rb_node *nd;
@ -641,7 +642,7 @@ size_t perf_session__fprintf_hists(struct perf_session *self,
fprintf(fp, "\n#\n");
print_entries:
for (nd = rb_first(&self->hists); nd; nd = rb_next(nd)) {
for (nd = rb_first(hists); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
if (show_displacement) {
@ -652,8 +653,13 @@ size_t perf_session__fprintf_hists(struct perf_session *self,
displacement = 0;
++position;
}
ret += hist_entry__fprintf(h, self, pair, show_displacement,
displacement, fp);
ret += hist_entry__fprintf(h, pair, show_displacement,
displacement, fp, session_total);
if (h->map == NULL && verbose > 1) {
__map_groups__fprintf_maps(&h->thread->mg,
MAP__FUNCTION, fp);
fprintf(fp, "%.10s end\n", graph_dotted_line);
}
}
free(rem_sq_bracket);

12
tools/perf/util/hist.h
View File

@ -10,8 +10,9 @@ struct perf_session;
struct hist_entry;
struct addr_location;
struct symbol;
struct rb_root;
struct hist_entry *__perf_session__add_hist_entry(struct perf_session *self,
struct hist_entry *__perf_session__add_hist_entry(struct rb_root *hists,
struct addr_location *al,
struct symbol *parent,
u64 count, bool *hit);
@ -19,9 +20,10 @@ extern int64_t hist_entry__cmp(struct hist_entry *, struct hist_entry *);
extern int64_t hist_entry__collapse(struct hist_entry *, struct hist_entry *);
void hist_entry__free(struct hist_entry *);
void perf_session__output_resort(struct perf_session *self, u64 total_samples);
void perf_session__collapse_resort(struct perf_session *self);
size_t perf_session__fprintf_hists(struct perf_session *self,
void perf_session__output_resort(struct rb_root *hists, u64 total_samples);
void perf_session__collapse_resort(struct rb_root *hists);
size_t perf_session__fprintf_hists(struct rb_root *hists,
struct perf_session *pair,
bool show_displacement, FILE *fp);
bool show_displacement, FILE *fp,
u64 session_total);
#endif /* __PERF_HIST_H */

2
tools/perf/util/probe-finder.c
View File

@ -169,7 +169,7 @@ static const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname)
{
Dwarf_Files *files;
size_t nfiles, i;
const char *src;
const char *src = NULL;
int ret;
if (!fname)

1
tools/perf/util/session.c
View File

@ -70,6 +70,7 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc
memcpy(self->filename, filename, len);
self->threads = RB_ROOT;
self->stats_by_id = RB_ROOT;
self->last_match = NULL;
self->mmap_window = 32;
self->cwd = NULL;

1
tools/perf/util/session.h
View File

@ -20,6 +20,7 @@ struct perf_session {
struct thread *last_match;
struct map *vmlinux_maps[MAP__NR_TYPES];
struct events_stats events_stats;
struct rb_root stats_by_id;
unsigned long event_total[PERF_RECORD_MAX];
unsigned long unknown_events;
struct rb_root hists;

41
tools/perf/util/thread.c
View File

@ -79,8 +79,8 @@ int thread__comm_len(struct thread *self)
return self->comm_len;
}
static size_t __map_groups__fprintf_maps(struct map_groups *self,
enum map_type type, FILE *fp)
size_t __map_groups__fprintf_maps(struct map_groups *self,
enum map_type type, FILE *fp)
{
size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
struct rb_node *nd;
@ -89,7 +89,7 @@ static size_t __map_groups__fprintf_maps(struct map_groups *self,
struct map *pos = rb_entry(nd, struct map, rb_node);
printed += fprintf(fp, "Map:");
printed += map__fprintf(pos, fp);
if (verbose > 1) {
if (verbose > 2) {
printed += dso__fprintf(pos->dso, type, fp);
printed += fprintf(fp, "--\n");
}
@ -183,8 +183,8 @@ struct thread *perf_session__findnew(struct perf_session *self, pid_t pid)
return th;
}
static void map_groups__remove_overlappings(struct map_groups *self,
struct map *map)
static int map_groups__fixup_overlappings(struct map_groups *self,
struct map *map)
{
struct rb_root *root = &self->maps[map->type];
struct rb_node *next = rb_first(root);
@ -209,7 +209,36 @@ static void map_groups__remove_overlappings(struct map_groups *self,
* list.
*/
list_add_tail(&pos->node, &self->removed_maps[map->type]);
/*
* Now check if we need to create new maps for areas not
* overlapped by the new map:
*/
if (map->start > pos->start) {
struct map *before = map__clone(pos);
if (before == NULL)
return -ENOMEM;
before->end = map->start - 1;
map_groups__insert(self, before);
if (verbose >= 2)
map__fprintf(before, stderr);
}
if (map->end < pos->end) {
struct map *after = map__clone(pos);
if (after == NULL)
return -ENOMEM;
after->start = map->end + 1;
map_groups__insert(self, after);
if (verbose >= 2)
map__fprintf(after, stderr);
}
}
return 0;
}
void maps__insert(struct rb_root *maps, struct map *map)
@ -254,7 +283,7 @@ struct map *maps__find(struct rb_root *maps, u64 ip)
void thread__insert_map(struct thread *self, struct map *map)
{
map_groups__remove_overlappings(&self->mg, map);
map_groups__fixup_overlappings(&self->mg, map);
map_groups__insert(&self->mg, map);
}

3
tools/perf/util/thread.h
View File

@ -10,6 +10,9 @@ struct map_groups {
struct list_head removed_maps[MAP__NR_TYPES];
};
size_t __map_groups__fprintf_maps(struct map_groups *self,
enum map_type type, FILE *fp);
struct thread {
struct rb_node rb_node;
struct map_groups mg;