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perf tools: Add mem access sampling core support 

This patch adds the sorting and histogram support
functions to enable profiling of memory accesses.

The following sorting orders are added:
 - symbol_daddr: data address symbol (or raw address)
 - dso_daddr: data address shared object
 - locked: access uses locked transaction
 - tlb : TLB access
 - mem : memory level of the access (L1, L2, L3, RAM, ...)
 - snoop: access snoop mode

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-12-git-send-email-eranian@google.com
[ committer note: changed to cope with fc5871ed, the move of methods to
  machine.[ch], and the rename of dsrc to data_src, to match the change
  made in the PERF_SAMPLE_DSRC in a previous patch. ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stephane Eranian 2013-01-24 16:10:35 +01:00 committed by Arnaldo Carvalho de Melo
parent 05484298cb
commit 98a3b32c99
10 changed files with 525 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
tools/perf/util/event.h
View File

@ -91,6 +91,7 @@ struct perf_sample {
u64 weight;
u32 cpu;
u32 raw_size;
u64 data_src;
void *raw_data;
struct ip_callchain *callchain;
struct branch_stack *branch_stack;
@ -98,6 +99,13 @@ struct perf_sample {
struct stack_dump user_stack;
};
#define PERF_MEM_DATA_SRC_NONE \
(PERF_MEM_S(OP, NA) |\
PERF_MEM_S(LVL, NA) |\
PERF_MEM_S(SNOOP, NA) |\
PERF_MEM_S(LOCK, NA) |\
PERF_MEM_S(TLB, NA))
struct build_id_event {
struct perf_event_header header;
pid_t pid;

6
tools/perf/util/evsel.c
View File

@ -1177,6 +1177,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
array++;
}
data->data_src = PERF_MEM_DATA_SRC_NONE;
if (type & PERF_SAMPLE_DATA_SRC) {
data->data_src = *array;
array++;
}
return 0;
}

86
tools/perf/util/hist.c
View File

@ -67,12 +67,16 @@ static void hists__set_unres_dso_col_len(struct hists *hists, int dso)
void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
{
const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
int symlen;
u16 len;
if (h->ms.sym)
hists__new_col_len(hists, HISTC_SYMBOL, h->ms.sym->namelen + 4);
else
else {
symlen = unresolved_col_width + 4 + 2;
hists__new_col_len(hists, HISTC_SYMBOL, symlen);
hists__set_unres_dso_col_len(hists, HISTC_DSO);
}
len = thread__comm_len(h->thread);
if (hists__new_col_len(hists, HISTC_COMM, len))
@ -87,7 +91,6 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
hists__new_col_len(hists, HISTC_PARENT, h->parent->namelen);
if (h->branch_info) {
int symlen;
/*
* +4 accounts for '[x] ' priv level info
* +2 account of 0x prefix on raw addresses
@ -116,6 +119,42 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
hists__set_unres_dso_col_len(hists, HISTC_DSO_TO);
}
}
if (h->mem_info) {
/*
* +4 accounts for '[x] ' priv level info
* +2 account of 0x prefix on raw addresses
*/
if (h->mem_info->daddr.sym) {
symlen = (int)h->mem_info->daddr.sym->namelen + 4
+ unresolved_col_width + 2;
hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
symlen);
} else {
symlen = unresolved_col_width + 4 + 2;
hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
symlen);
}
if (h->mem_info->daddr.map) {
symlen = dso__name_len(h->mem_info->daddr.map->dso);
hists__new_col_len(hists, HISTC_MEM_DADDR_DSO,
symlen);
} else {
symlen = unresolved_col_width + 4 + 2;
hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
}
} else {
symlen = unresolved_col_width + 4 + 2;
hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL, symlen);
hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
}
hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
hists__new_col_len(hists, HISTC_MEM_TLB, 22);
hists__new_col_len(hists, HISTC_MEM_SNOOP, 12);
hists__new_col_len(hists, HISTC_MEM_LVL, 21 + 3);
hists__new_col_len(hists, HISTC_LOCAL_WEIGHT, 12);
hists__new_col_len(hists, HISTC_GLOBAL_WEIGHT, 12);
}
void hists__output_recalc_col_len(struct hists *hists, int max_rows)
@ -158,6 +197,7 @@ static void hist_entry__add_cpumode_period(struct hist_entry *he,
static void he_stat__add_period(struct he_stat *he_stat, u64 period,
u64 weight)
{
he_stat->period += period;
he_stat->weight += weight;
he_stat->nr_events += 1;
@ -243,7 +283,7 @@ void hists__decay_entries_threaded(struct hists *hists,
static struct hist_entry *hist_entry__new(struct hist_entry *template)
{
size_t callchain_size = symbol_conf.use_callchain ? sizeof(struct callchain_root) : 0;
struct hist_entry *he = malloc(sizeof(*he) + callchain_size);
struct hist_entry *he = zalloc(sizeof(*he) + callchain_size);
if (he != NULL) {
*he = *template;
@ -258,6 +298,13 @@ static struct hist_entry *hist_entry__new(struct hist_entry *template)
he->branch_info->to.map->referenced = true;
}
if (he->mem_info) {
if (he->mem_info->iaddr.map)
he->mem_info->iaddr.map->referenced = true;
if (he->mem_info->daddr.map)
he->mem_info->daddr.map->referenced = true;
}
if (symbol_conf.use_callchain)
callchain_init(he->callchain);
@ -346,6 +393,36 @@ static struct hist_entry *add_hist_entry(struct hists *hists,
return he;
}
struct hist_entry *__hists__add_mem_entry(struct hists *self,
struct addr_location *al,
struct symbol *sym_parent,
struct mem_info *mi,
u64 period,
u64 weight)
{
struct hist_entry entry = {
.thread = al->thread,
.ms = {
.map = al->map,
.sym = al->sym,
},
.stat = {
.period = period,
.weight = weight,
.nr_events = 1,
},
.cpu = al->cpu,
.ip = al->addr,
.level = al->level,
.parent = sym_parent,
.filtered = symbol__parent_filter(sym_parent),
.hists = self,
.mem_info = mi,
.branch_info = NULL,
};
return add_hist_entry(self, &entry, al, period, weight);
}
struct hist_entry *__hists__add_branch_entry(struct hists *self,
struct addr_location *al,
struct symbol *sym_parent,
@ -371,6 +448,7 @@ struct hist_entry *__hists__add_branch_entry(struct hists *self,
.filtered = symbol__parent_filter(sym_parent),
.branch_info = bi,
.hists = self,
.mem_info = NULL,
};
return add_hist_entry(self, &entry, al, period, weight);
@ -398,6 +476,8 @@ struct hist_entry *__hists__add_entry(struct hists *self,
.parent = sym_parent,
.filtered = symbol__parent_filter(sym_parent),
.hists = self,
.branch_info = NULL,
.mem_info = NULL,
};
return add_hist_entry(self, &entry, al, period, weight);

13
tools/perf/util/hist.h
View File

@ -51,6 +51,12 @@ enum hist_column {
HISTC_SRCLINE,
HISTC_LOCAL_WEIGHT,
HISTC_GLOBAL_WEIGHT,
HISTC_MEM_DADDR_SYMBOL,
HISTC_MEM_DADDR_DSO,
HISTC_MEM_LOCKED,
HISTC_MEM_TLB,
HISTC_MEM_LVL,
HISTC_MEM_SNOOP,
HISTC_NR_COLS, /* Last entry */
};
@ -90,6 +96,13 @@ struct hist_entry *__hists__add_branch_entry(struct hists *self,
u64 period,
u64 weight);
struct hist_entry *__hists__add_mem_entry(struct hists *self,
struct addr_location *al,
struct symbol *sym_parent,
struct mem_info *mi,
u64 period,
u64 weight);
void hists__output_resort(struct hists *self);
void hists__output_resort_threaded(struct hists *hists);
void hists__collapse_resort(struct hists *self);

32
tools/perf/util/machine.c
View File

@ -1097,6 +1097,38 @@ static void ip__resolve_ams(struct machine *machine, struct thread *thread,
ams->map = al.map;
}
static void ip__resolve_data(struct machine *machine, struct thread *thread,
u8 m, struct addr_map_symbol *ams, u64 addr)
{
struct addr_location al;
memset(&al, 0, sizeof(al));
thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, &al,
NULL);
ams->addr = addr;
ams->al_addr = al.addr;
ams->sym = al.sym;
ams->map = al.map;
}
struct mem_info *machine__resolve_mem(struct machine *machine,
struct thread *thr,
struct perf_sample *sample,
u8 cpumode)
{
struct mem_info *mi = zalloc(sizeof(*mi));
if (!mi)
return NULL;
ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip);
ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr);
mi->data_src.val = sample->data_src;
return mi;
}
struct branch_info *machine__resolve_bstack(struct machine *machine,
struct thread *thr,
struct branch_stack *bs)

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

@ -76,6 +76,9 @@ void machine__delete(struct machine *machine);
struct branch_info *machine__resolve_bstack(struct machine *machine,
struct thread *thread,
struct branch_stack *bs);
struct mem_info *machine__resolve_mem(struct machine *machine,
struct thread *thread,
struct perf_sample *sample, u8 cpumode);
int machine__resolve_callchain(struct machine *machine,
struct perf_evsel *evsel,
struct thread *thread,

3
tools/perf/util/session.c
View File

@ -801,6 +801,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
if (sample_type & PERF_SAMPLE_WEIGHT)
printf("... weight: %" PRIu64 "\n", sample->weight);
if (sample_type & PERF_SAMPLE_DATA_SRC)
printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
}
static struct machine *

369
tools/perf/util/sort.c
View File

@ -198,11 +198,19 @@ static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
}
ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", level);
if (sym)
ret += repsep_snprintf(bf + ret, size - ret, "%-*s",
width - ret,
sym->name);
else {
if (sym && map) {
if (map->type == MAP__VARIABLE) {
ret += repsep_snprintf(bf + ret, size - ret, "%s", sym->name);
ret += repsep_snprintf(bf + ret, size - ret, "+0x%llx",
ip - sym->start);
ret += repsep_snprintf(bf + ret, size - ret, "%-*s",
width - ret, "");
} else {
ret += repsep_snprintf(bf + ret, size - ret, "%-*s",
width - ret,
sym->name);
}
} else {
size_t len = BITS_PER_LONG / 4;
ret += repsep_snprintf(bf + ret, size - ret, "%-#.*llx",
len, ip);
@ -457,6 +465,304 @@ static int hist_entry__mispredict_snprintf(struct hist_entry *self, char *bf,
return repsep_snprintf(bf, size, "%-*s", width, out);
}
/* --sort daddr_sym */
static int64_t
sort__daddr_cmp(struct hist_entry *left, struct hist_entry *right)
{
uint64_t l = 0, r = 0;
if (left->mem_info)
l = left->mem_info->daddr.addr;
if (right->mem_info)
r = right->mem_info->daddr.addr;
return (int64_t)(r - l);
}
static int hist_entry__daddr_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
uint64_t addr = 0;
struct map *map = NULL;
struct symbol *sym = NULL;
if (self->mem_info) {
addr = self->mem_info->daddr.addr;
map = self->mem_info->daddr.map;
sym = self->mem_info->daddr.sym;
}
return _hist_entry__sym_snprintf(map, sym, addr, self->level, bf, size,
width);
}
static int64_t
sort__dso_daddr_cmp(struct hist_entry *left, struct hist_entry *right)
{
struct map *map_l = NULL;
struct map *map_r = NULL;
if (left->mem_info)
map_l = left->mem_info->daddr.map;
if (right->mem_info)
map_r = right->mem_info->daddr.map;
return _sort__dso_cmp(map_l, map_r);
}
static int hist_entry__dso_daddr_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
struct map *map = NULL;
if (self->mem_info)
map = self->mem_info->daddr.map;
return _hist_entry__dso_snprintf(map, bf, size, width);
}
static int64_t
sort__locked_cmp(struct hist_entry *left, struct hist_entry *right)
{
union perf_mem_data_src data_src_l;
union perf_mem_data_src data_src_r;
if (left->mem_info)
data_src_l = left->mem_info->data_src;
else
data_src_l.mem_lock = PERF_MEM_LOCK_NA;
if (right->mem_info)
data_src_r = right->mem_info->data_src;
else
data_src_r.mem_lock = PERF_MEM_LOCK_NA;
return (int64_t)(data_src_r.mem_lock - data_src_l.mem_lock);
}
static int hist_entry__locked_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
const char *out;
u64 mask = PERF_MEM_LOCK_NA;
if (self->mem_info)
mask = self->mem_info->data_src.mem_lock;
if (mask & PERF_MEM_LOCK_NA)
out = "N/A";
else if (mask & PERF_MEM_LOCK_LOCKED)
out = "Yes";
else
out = "No";
return repsep_snprintf(bf, size, "%-*s", width, out);
}
static int64_t
sort__tlb_cmp(struct hist_entry *left, struct hist_entry *right)
{
union perf_mem_data_src data_src_l;
union perf_mem_data_src data_src_r;
if (left->mem_info)
data_src_l = left->mem_info->data_src;
else
data_src_l.mem_dtlb = PERF_MEM_TLB_NA;
if (right->mem_info)
data_src_r = right->mem_info->data_src;
else
data_src_r.mem_dtlb = PERF_MEM_TLB_NA;
return (int64_t)(data_src_r.mem_dtlb - data_src_l.mem_dtlb);
}
static const char * const tlb_access[] = {
"N/A",
"HIT",
"MISS",
"L1",
"L2",
"Walker",
"Fault",
};
#define NUM_TLB_ACCESS (sizeof(tlb_access)/sizeof(const char *))
static int hist_entry__tlb_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
char out[64];
size_t sz = sizeof(out) - 1; /* -1 for null termination */
size_t l = 0, i;
u64 m = PERF_MEM_TLB_NA;
u64 hit, miss;
out[0] = '\0';
if (self->mem_info)
m = self->mem_info->data_src.mem_dtlb;
hit = m & PERF_MEM_TLB_HIT;
miss = m & PERF_MEM_TLB_MISS;
/* already taken care of */
m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
for (i = 0; m && i < NUM_TLB_ACCESS; i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
strncat(out, tlb_access[i], sz - l);
l += strlen(tlb_access[i]);
}
if (*out == '\0')
strcpy(out, "N/A");
if (hit)
strncat(out, " hit", sz - l);
if (miss)
strncat(out, " miss", sz - l);
return repsep_snprintf(bf, size, "%-*s", width, out);
}
static int64_t
sort__lvl_cmp(struct hist_entry *left, struct hist_entry *right)
{
union perf_mem_data_src data_src_l;
union perf_mem_data_src data_src_r;
if (left->mem_info)
data_src_l = left->mem_info->data_src;
else
data_src_l.mem_lvl = PERF_MEM_LVL_NA;
if (right->mem_info)
data_src_r = right->mem_info->data_src;
else
data_src_r.mem_lvl = PERF_MEM_LVL_NA;
return (int64_t)(data_src_r.mem_lvl - data_src_l.mem_lvl);
}
static const char * const mem_lvl[] = {
"N/A",
"HIT",
"MISS",
"L1",
"LFB",
"L2",
"L3",
"Local RAM",
"Remote RAM (1 hop)",
"Remote RAM (2 hops)",
"Remote Cache (1 hop)",
"Remote Cache (2 hops)",
"I/O",
"Uncached",
};
#define NUM_MEM_LVL (sizeof(mem_lvl)/sizeof(const char *))
static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
char out[64];
size_t sz = sizeof(out) - 1; /* -1 for null termination */
size_t i, l = 0;
u64 m = PERF_MEM_LVL_NA;
u64 hit, miss;
if (self->mem_info)
m = self->mem_info->data_src.mem_lvl;
out[0] = '\0';
hit = m & PERF_MEM_LVL_HIT;
miss = m & PERF_MEM_LVL_MISS;
/* already taken care of */
m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS);
for (i = 0; m && i < NUM_MEM_LVL; i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
strncat(out, mem_lvl[i], sz - l);
l += strlen(mem_lvl[i]);
}
if (*out == '\0')
strcpy(out, "N/A");
if (hit)
strncat(out, " hit", sz - l);
if (miss)
strncat(out, " miss", sz - l);
return repsep_snprintf(bf, size, "%-*s", width, out);
}
static int64_t
sort__snoop_cmp(struct hist_entry *left, struct hist_entry *right)
{
union perf_mem_data_src data_src_l;
union perf_mem_data_src data_src_r;
if (left->mem_info)
data_src_l = left->mem_info->data_src;
else
data_src_l.mem_snoop = PERF_MEM_SNOOP_NA;
if (right->mem_info)
data_src_r = right->mem_info->data_src;
else
data_src_r.mem_snoop = PERF_MEM_SNOOP_NA;
return (int64_t)(data_src_r.mem_snoop - data_src_l.mem_snoop);
}
static const char * const snoop_access[] = {
"N/A",
"None",
"Miss",
"Hit",
"HitM",
};
#define NUM_SNOOP_ACCESS (sizeof(snoop_access)/sizeof(const char *))
static int hist_entry__snoop_snprintf(struct hist_entry *self, char *bf,
size_t size, unsigned int width)
{
char out[64];
size_t sz = sizeof(out) - 1; /* -1 for null termination */
size_t i, l = 0;
u64 m = PERF_MEM_SNOOP_NA;
out[0] = '\0';
if (self->mem_info)
m = self->mem_info->data_src.mem_snoop;
for (i = 0; m && i < NUM_SNOOP_ACCESS; i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
strncat(out, snoop_access[i], sz - l);
l += strlen(snoop_access[i]);
}
if (*out == '\0')
strcpy(out, "N/A");
return repsep_snprintf(bf, size, "%-*s", width, out);
}
struct sort_entry sort_mispredict = {
.se_header = "Branch Mispredicted",
.se_cmp = sort__mispredict_cmp,
@ -507,6 +813,48 @@ struct sort_entry sort_global_weight = {
.se_width_idx = HISTC_GLOBAL_WEIGHT,
};
struct sort_entry sort_mem_daddr_sym = {
.se_header = "Data Symbol",
.se_cmp = sort__daddr_cmp,
.se_snprintf = hist_entry__daddr_snprintf,
.se_width_idx = HISTC_MEM_DADDR_SYMBOL,
};
struct sort_entry sort_mem_daddr_dso = {
.se_header = "Data Object",
.se_cmp = sort__dso_daddr_cmp,
.se_snprintf = hist_entry__dso_daddr_snprintf,
.se_width_idx = HISTC_MEM_DADDR_SYMBOL,
};
struct sort_entry sort_mem_locked = {
.se_header = "Locked",
.se_cmp = sort__locked_cmp,
.se_snprintf = hist_entry__locked_snprintf,
.se_width_idx = HISTC_MEM_LOCKED,
};
struct sort_entry sort_mem_tlb = {
.se_header = "TLB access",
.se_cmp = sort__tlb_cmp,
.se_snprintf = hist_entry__tlb_snprintf,
.se_width_idx = HISTC_MEM_TLB,
};
struct sort_entry sort_mem_lvl = {
.se_header = "Memory access",
.se_cmp = sort__lvl_cmp,
.se_snprintf = hist_entry__lvl_snprintf,
.se_width_idx = HISTC_MEM_LVL,
};
struct sort_entry sort_mem_snoop = {
.se_header = "Snoop",
.se_cmp = sort__snoop_cmp,
.se_snprintf = hist_entry__snoop_snprintf,
.se_width_idx = HISTC_MEM_SNOOP,
};
struct sort_dimension {
const char *name;
struct sort_entry *entry;
@ -525,6 +873,12 @@ static struct sort_dimension common_sort_dimensions[] = {
DIM(SORT_SRCLINE, "srcline", sort_srcline),
DIM(SORT_LOCAL_WEIGHT, "local_weight", sort_local_weight),
DIM(SORT_GLOBAL_WEIGHT, "weight", sort_global_weight),
DIM(SORT_MEM_DADDR_SYMBOL, "symbol_daddr", sort_mem_daddr_sym),
DIM(SORT_MEM_DADDR_DSO, "dso_daddr", sort_mem_daddr_dso),
DIM(SORT_MEM_LOCKED, "locked", sort_mem_locked),
DIM(SORT_MEM_TLB, "tlb", sort_mem_tlb),
DIM(SORT_MEM_LVL, "mem", sort_mem_lvl),
DIM(SORT_MEM_SNOOP, "snoop", sort_mem_snoop),
};
#undef DIM
@ -561,7 +915,10 @@ int sort_dimension__add(const char *tok)
return -EINVAL;
}
sort__has_parent = 1;
} else if (sd->entry == &sort_sym) {
} else if (sd->entry == &sort_sym ||
sd->entry == &sort_sym_from ||
sd->entry == &sort_sym_to ||
sd->entry == &sort_mem_daddr_sym) {
sort__has_sym = 1;
}

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

@ -101,7 +101,8 @@ struct hist_entry {
struct rb_root sorted_chain;
struct branch_info *branch_info;
struct hists *hists;
struct callchain_root callchain[0];
struct mem_info *mem_info;
struct callchain_root callchain[0]; /* must be last member */
};
static inline bool hist_entry__has_pairs(struct hist_entry *he)
@ -133,6 +134,12 @@ enum sort_type {
SORT_SRCLINE,
SORT_LOCAL_WEIGHT,
SORT_GLOBAL_WEIGHT,
SORT_MEM_DADDR_SYMBOL,
SORT_MEM_DADDR_DSO,
SORT_MEM_LOCKED,
SORT_MEM_TLB,
SORT_MEM_LVL,
SORT_MEM_SNOOP,
/* branch stack specific sort keys */
__SORT_BRANCH_STACK,

6
tools/perf/util/symbol.h
View File

@ -156,6 +156,12 @@ struct branch_info {
struct branch_flags flags;
};
struct mem_info {
struct addr_map_symbol iaddr;
struct addr_map_symbol daddr;
union perf_mem_data_src data_src;
};
struct addr_location {
struct thread *thread;
struct map *map;