perf report: Add Instruction Tracing support
Add support for decoding an AUX area assuming it contains instruction tracing data. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> 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 <acme@redhat.com>
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@ -327,6 +327,33 @@ OPTIONS
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include::callchain-overhead-calculation.txt[]
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--itrace::
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Options for decoding instruction tracing data. The options are:
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i synthesize instructions events
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b synthesize branches events
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c synthesize branches events (calls only)
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r synthesize branches events (returns only)
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e synthesize error events
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d create a debug log
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g synthesize a call chain for instructions events
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The default is all events i.e. the same as --itrace=ibe
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In addition, the period (default 100000) for instructions events
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can be specified in units of:
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i instructions
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t ticks
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ms milliseconds
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us microseconds
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ns nanoseconds (default)
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Also the call chain size (default 16, max. 1024) for instructions
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events can be specified.
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To disable decoding entirely, use --no-itrace.
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SEE ALSO
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--------
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linkperf:perf-stat[1], linkperf:perf-annotate[1]
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@ -36,6 +36,8 @@
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#include "util/data.h"
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#include "arch/common.h"
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#include "util/auxtrace.h"
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#include <dlfcn.h>
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#include <linux/bitmap.h>
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@ -585,6 +587,7 @@ parse_percent_limit(const struct option *opt, const char *str,
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int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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struct perf_session *session;
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struct itrace_synth_opts itrace_synth_opts = { .set = 0, };
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struct stat st;
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bool has_br_stack = false;
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int branch_mode = -1;
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@ -607,6 +610,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
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.attr = perf_event__process_attr,
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.tracing_data = perf_event__process_tracing_data,
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.build_id = perf_event__process_build_id,
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.id_index = perf_event__process_id_index,
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.auxtrace_info = perf_event__process_auxtrace_info,
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.auxtrace = perf_event__process_auxtrace,
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.ordered_events = true,
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.ordering_requires_timestamps = true,
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},
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@ -717,6 +723,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
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"Don't show entries under that percent", parse_percent_limit),
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OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
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"how to display percentage of filtered entries", parse_filter_percentage),
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OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
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"Instruction Tracing options",
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itrace_parse_synth_opts),
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OPT_END()
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};
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struct perf_data_file file = {
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@ -761,6 +770,8 @@ repeat:
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report.queue_size);
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}
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session->itrace_synth_opts = &itrace_synth_opts;
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report.session = session;
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has_br_stack = perf_header__has_feat(&session->header,
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