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| author | Kan Liang <kan.liang@intel.com> | 2015-08-11 10:30:49 (GMT) |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-12 16:20:28 (GMT) |
| commit | 9e207ddfa20781e56465ce9a537f0a377c9d34fb (patch) | |
| tree | 8eea5617ff1c5e997a591ef8733aae16e1668aee /tools/perf/util/hist.c | |
| parent | f9db0d0f1b2cf030083c83d3ed3a4bbae6bdc8b7 (diff) | |
| download | linux-9e207ddfa20781e56465ce9a537f0a377c9d34fb.tar.xz | |
perf report: Show call graph from reference events
Introduce --show-ref-call-graph for perf report to print reference
callgraph for no callgraph event.
Here is an example.
perf report --show-ref-call-graph --stdio
# To display the perf.data header info, please use
--header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 5 of event 'cpu/cpu-cycles,call-graph=fp/'
# Event count (approx.): 144985
#
# Children Self Command Shared Object Symbol
# ........ ........ ....... ................ ........................................
#
72.30% 0.00% sleep [kernel.vmlinux] [k] entry_SYSCALL_64_fastpath
|
---entry_SYSCALL_64_fastpath
|
|--22.62%-- __GI___libc_nanosleep
--77.38%-- [...]
......
# Samples: 6 of event 'cpu/instructions,call-graph=no/', show reference callgraph
# Event count (approx.): 172780
#
# Children Self Command Shared Object Symbol
# ........ ........ ....... ................ ........................................
#
73.16% 0.00% sleep [kernel.vmlinux] [k] entry_SYSCALL_64_fastpath
|
---entry_SYSCALL_64_fastpath
|
|--31.44%-- __GI___libc_nanosleep
--68.56%-- [...]
Signed-off-by: Kan Liang <kan.liang@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1439289050-40510-3-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/hist.c')
| -rw-r--r-- | tools/perf/util/hist.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 1cd785b..08b6cd9 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -1141,7 +1141,12 @@ void hists__output_resort(struct hists *hists, struct ui_progress *prog) struct hist_entry *n; u64 min_callchain_hits; struct perf_evsel *evsel = hists_to_evsel(hists); - bool use_callchain = evsel ? (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) : symbol_conf.use_callchain; + bool use_callchain; + + if (evsel && !symbol_conf.show_ref_callgraph) + use_callchain = evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN; + else + use_callchain = symbol_conf.use_callchain; min_callchain_hits = hists->stats.total_period * (callchain_param.min_percent / 100); |