Messages in this thread Patch in this message |  | | From | Adrian Hunter <> | Subject | [PATCH 07/11] perf intel-pt: Use itrace debug log flags to suppress some messages | Date | Thu, 9 Jul 2020 20:36:24 +0300 |
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The "d" option may be followed by a number which has the following effect: 1 Suppress logging of perf events
Suppressing perf events is useful for decreasing the size of the log.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/Documentation/perf-intel-pt.txt | 4 +++- tools/perf/util/intel-pt.c | 19 ++++++++++++------- 2 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index 0fcd8ad897b0..85a2ff804900 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -879,7 +879,9 @@ The values may be combined by bitwise OR'ing them. The "d" option will cause the creation of a file "intel_pt.log" containing all decoded packets and instructions. Note that this option slows down the decoder -and that the resulting file may be very large. +and that the resulting file may be very large. The "d" option may be followed +by a number which has the following effect: + 1 Suppress logging of perf events In addition, the period of the "instructions" event can be specified. e.g. diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index a8e8e8acbcc8..d90375659244 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -49,6 +49,8 @@ #define INTEL_PT_ERR_SUPPRESS_OVF 1 #define INTEL_PT_ERR_SUPPRESS_LOST 2 +#define INTEL_PT_LOG_SUPPRESS_EV 1 + struct range { u64 start; u64 end; @@ -252,6 +254,11 @@ static void intel_pt_dump_sample(struct perf_session *session, intel_pt_dump(pt, sample->aux_sample.data, sample->aux_sample.size); } +static bool intel_pt_log_events(struct intel_pt *pt) +{ + return !(pt->synth_opts.log_flags & INTEL_PT_LOG_SUPPRESS_EV); +} + static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a, struct auxtrace_buffer *b) { @@ -2589,10 +2596,6 @@ static int intel_pt_context_switch(struct intel_pt *pt, union perf_event *event, return -EINVAL; } - intel_pt_log("context_switch: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n", - cpu, pid, tid, sample->time, perf_time_to_tsc(sample->time, - &pt->tc)); - ret = intel_pt_sync_switch(pt, cpu, tid, sample->time); if (ret <= 0) return ret; @@ -2749,9 +2752,11 @@ static int intel_pt_process_event(struct perf_session *session, if (!err && event->header.type == PERF_RECORD_TEXT_POKE) err = intel_pt_text_poke(pt, event); - intel_pt_log("event %u: cpu %d time %"PRIu64" tsc %#"PRIx64" ", - event->header.type, sample->cpu, sample->time, timestamp); - intel_pt_log_event(event); + if (intel_pt_enable_logging && intel_pt_log_events(pt)) { + intel_pt_log("event %u: cpu %d time %"PRIu64" tsc %#"PRIx64" ", + event->header.type, sample->cpu, sample->time, timestamp); + intel_pt_log_event(event); + } return err; } -- 2.25.1
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