From d457c96392bb418bd998f3ccf93e0e4c958fcd0f Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Tue, 11 Aug 2015 06:30:47 -0400 Subject: perf callchain: Per-event type selection support This patchkit adds the ability to set callgraph mode (fp, dwarf, lbr) per event. This in term can reduce sampling overhead and the size of the perf.data. Here is an example. perf record -e 'cpu/cpu-cycles,period=1000,call-graph=fp,time=1/,cpu/instructions,call-graph=lbr/' sleep 1 perf evlist -v cpu/cpu-cycles,period=1000,call-graph=fp,time=1/: type: 4, size: 112, config: 0x3c, { sample_period, sample_freq }: 1000, sample_type: IP|TID|TIME|CALLCHAIN|PERIOD|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 cpu/instructions,call-graph=lbr/: type: 4, size: 112, config: 0xc0, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|PERIOD|BRANCH_STACK|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, freq: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 Signed-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/1439289050-40510-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evsel.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tools/perf/util/evsel.h') diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index fdf2674ab339..93ac6b128149 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -41,6 +41,8 @@ enum { PERF_EVSEL__CONFIG_TERM_PERIOD, PERF_EVSEL__CONFIG_TERM_FREQ, PERF_EVSEL__CONFIG_TERM_TIME, + PERF_EVSEL__CONFIG_TERM_CALLGRAPH, + PERF_EVSEL__CONFIG_TERM_STACK_USER, PERF_EVSEL__CONFIG_TERM_MAX, }; @@ -51,6 +53,8 @@ struct perf_evsel_config_term { u64 period; u64 freq; bool time; + char *callgraph; + u64 stack_user; } val; }; -- cgit v1.2.3-55-g7522