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perf tools: Dump callchain context marker names

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These are hard to interpret in the raw output because they are printed
as hex but are defined in perf_event.h as decimal. Make it much easier
to read the raw callchains by just printing their names.

For example:

  $ perf report -D

  1798195372321 0x4638 [0xb0]: PERF_RECORD_SAMPLE(IP, 0x4002): 44922/44922: 0x7c8046dd3400 period: 120218 addr: 0
  ... FP chain: nr:12
  .....  0: fffffffffffffe00 (PERF_CONTEXT_USER)
  .....  1: 00007c8046dd3400
  .....  2: 00007c8046db86d3

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
[ Add PERF_CONTEXT_USER_DEFERRED too, as per Namhyung's review comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2026-01-02 12:15:43 +00:00 committed by Arnaldo Carvalho de Melo
parent a66f6242fb
commit 6e052cfe47
1 changed files with 25 additions and 2 deletions
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27
tools/perf/util/session.c
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@ -841,6 +841,28 @@ static void callchain__lbr_callstack_printf(struct perf_sample *sample)
}
}
static const char *callchain_context_str(u64 ip)
{
switch (ip) {
case PERF_CONTEXT_HV:
return " (PERF_CONTEXT_HV)";
case PERF_CONTEXT_KERNEL:
return " (PERF_CONTEXT_KERNEL)";
case PERF_CONTEXT_USER:
return " (PERF_CONTEXT_USER)";
case PERF_CONTEXT_GUEST:
return " (PERF_CONTEXT_GUEST)";
case PERF_CONTEXT_GUEST_KERNEL:
return " (PERF_CONTEXT_GUEST_KERNEL)";
case PERF_CONTEXT_GUEST_USER:
return " (PERF_CONTEXT_GUEST_USER)";
case PERF_CONTEXT_USER_DEFERRED:
return " (PERF_CONTEXT_USER_DEFERRED)";
default:
return "";
}
}
static void callchain__printf(struct evsel *evsel,
struct perf_sample *sample)
{
@ -853,8 +875,9 @@ static void callchain__printf(struct evsel *evsel,
printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
for (i = 0; i < callchain->nr; i++)
printf("..... %2d: %016" PRIx64 "\n",
i, callchain->ips[i]);
printf("..... %2d: %016" PRIx64 "%s\n",
i, callchain->ips[i],
callchain_context_str(callchain->ips[i]));
if (sample->deferred_callchain)
printf("...... (deferred)\n");