From 520a2ebc2f0bd46b65feb7ca73a9ed65ea1a36bd Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 24 Apr 2015 22:29:45 +0300 Subject: [PATCH] perf report: Add Instruction Tracing support Add support for decoding an AUX area assuming it contains instruction tracing data. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1429903807-20559-4-git-send-email-adrian.hunter@intel.com [ Do not use -Z as an alternative to --itrace ] [ Fixed initialization of itrace_synth_opts struct fields on older gcc versions ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-report.txt | 27 ++++++++++++++++++++++++ tools/perf/builtin-report.c | 11 ++++++++++ 2 files changed, 38 insertions(+) diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 896672badba3..b66f6b41b179 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -327,6 +327,33 @@ OPTIONS include::callchain-overhead-calculation.txt[] +--itrace:: + Options for decoding instruction tracing data. The options are: + + i synthesize instructions events + b synthesize branches events + c synthesize branches events (calls only) + r synthesize branches events (returns only) + e synthesize error events + d create a debug log + g synthesize a call chain for instructions events + + The default is all events i.e. the same as --itrace=ibe + + In addition, the period (default 100000) for instructions events + can be specified in units of: + + i instructions + t ticks + ms milliseconds + us microseconds + ns nanoseconds (default) + + Also the call chain size (default 16, max. 1024) for instructions + events can be specified. + + To disable decoding entirely, use --no-itrace. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-annotate[1] diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 476cdf7afcca..18cb0ff39b4e 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -36,6 +36,8 @@ #include "util/data.h" #include "arch/common.h" +#include "util/auxtrace.h" + #include #include @@ -585,6 +587,7 @@ parse_percent_limit(const struct option *opt, const char *str, int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused) { struct perf_session *session; + struct itrace_synth_opts itrace_synth_opts = { .set = 0, }; struct stat st; bool has_br_stack = false; int branch_mode = -1; @@ -607,6 +610,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused) .attr = perf_event__process_attr, .tracing_data = perf_event__process_tracing_data, .build_id = perf_event__process_build_id, + .id_index = perf_event__process_id_index, + .auxtrace_info = perf_event__process_auxtrace_info, + .auxtrace = perf_event__process_auxtrace, .ordered_events = true, .ordering_requires_timestamps = true, }, @@ -717,6 +723,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused) "Don't show entries under that percent", parse_percent_limit), OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", "how to display percentage of filtered entries", parse_filter_percentage), + OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts", + "Instruction Tracing options", + itrace_parse_synth_opts), OPT_END() }; struct perf_data_file file = { @@ -761,6 +770,8 @@ repeat: report.queue_size); } + session->itrace_synth_opts = &itrace_synth_opts; + report.session = session; has_br_stack = perf_header__has_feat(&session->header, -- 2.20.1