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perf script: Enable printing of interrupted machine state 

This patch adds the output of the interrupted machine state (iregs) to
perf script. It presents them  as NAME:VALUE so this is easy to parse
during post processing.

To capture the interrupted machine state:
   $ perf record -I ....

to display iregs, use the -F option:

   $ perf script -F ip,iregs
   40afc2   AX:0x6c5770    BX:0x1e    CX:0x5f4d80a    DX:0x101010101010101    SI:0x1

Signed-off-by: Stephane Eranian <eranian@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1441039273-16260-2-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stephane Eranian 2015-08-31 18:41:10 +02:00 committed by Arnaldo Carvalho de Melo
parent d988d5ee64
commit fc36f9485a
2 changed files with 31 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/Documentation/perf-script.txt
View File

@ -116,7 +116,7 @@ OPTIONS
--fields::
Comma separated list of fields to print. Options are:
comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
srcline, period, flags.
srcline, period, iregs, flags.
Field list can be prepended with the type, trace, sw or hw,
to indicate to which event type the field list applies.
e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace

31
tools/perf/builtin-script.c
View File

@ -6,6 +6,7 @@
#include "util/exec_cmd.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "util/perf_regs.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/symbol.h"
@ -46,6 +47,7 @@ enum perf_output_field {
PERF_OUTPUT_SYMOFFSET = 1U << 11,
PERF_OUTPUT_SRCLINE = 1U << 12,
PERF_OUTPUT_PERIOD = 1U << 13,
PERF_OUTPUT_IREGS = 1U << 14,
};
struct output_option {
@ -66,6 +68,7 @@ struct output_option {
{.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
{.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
{.str = "period", .field = PERF_OUTPUT_PERIOD},
{.str = "iregs", .field = PERF_OUTPUT_IREGS},
};
/* default set to maintain compatibility with current format */
@ -255,6 +258,11 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
PERF_OUTPUT_PERIOD))
return -EINVAL;
if (PRINT_FIELD(IREGS) &&
perf_evsel__check_stype(evsel, PERF_SAMPLE_REGS_INTR, "IREGS",
PERF_OUTPUT_IREGS))
return -EINVAL;
return 0;
}
@ -352,6 +360,24 @@ static int perf_session__check_output_opt(struct perf_session *session)
return 0;
}
static void print_sample_iregs(union perf_event *event __maybe_unused,
struct perf_sample *sample,
struct thread *thread __maybe_unused,
struct perf_event_attr *attr)
{
struct regs_dump *regs = &sample->intr_regs;
uint64_t mask = attr->sample_regs_intr;
unsigned i = 0, r;
if (!regs)
return;
for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
u64 val = regs->regs[i++];
printf("%5s:0x%"PRIx64" ", perf_reg_name(r), val);
}
}
static void print_sample_start(struct perf_sample *sample,
struct thread *thread,
struct perf_evsel *evsel)
@ -525,6 +551,9 @@ static void process_event(union perf_event *event, struct perf_sample *sample,
PERF_MAX_STACK_DEPTH);
}
if (PRINT_FIELD(IREGS))
print_sample_iregs(event, sample, thread, attr);
printf("\n");
}
@ -1643,7 +1672,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"comma separated output fields prepend with 'type:'. "
"Valid types: hw,sw,trace,raw. "
"Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
"addr,symoff,period,flags", parse_output_fields),
"addr,symoff,period,iregs,flags", parse_output_fields),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",