diff options
Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index cf8ad50f3de1..0228efc96686 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -275,6 +275,11 @@ OPTIONS User can change the size by passing the size after comma like "--call-graph dwarf,4096". + When "fp" recording is used, perf tries to save stack enties + up to the number specified in sysctl.kernel.perf_event_max_stack + by default. User can change the number by passing it after comma + like "--call-graph fp,32". + -q:: --quiet:: Don't print any message, useful for scripting. @@ -313,6 +318,11 @@ OPTIONS --sample-cpu:: Record the sample cpu. +--sample-identifier:: + Record the sample identifier i.e. PERF_SAMPLE_IDENTIFIER bit set in + the sample_type member of the struct perf_event_attr argument to the + perf_event_open system call. + -n:: --no-samples:: Don't sample. @@ -387,6 +397,9 @@ following filters are defined: - abort_tx: only when the target is a hardware transaction abort - cond: conditional branches - save_type: save branch type during sampling in case binary is not available later + For the platforms with Intel Arch LBR support (12th-Gen+ client or + 4th-Gen Xeon+ server), the save branch type is unconditionally enabled + when the taken branch stack sampling is enabled. + The option requires at least one branch type among any, any_call, any_ret, ind_call, cond. @@ -747,8 +760,6 @@ events in data directory files. Option specified with no or empty value defaults to CPU layout. Masks defined or provided by the option value are filtered through the mask provided by -C option. -include::intel-hybrid.txt[] - --debuginfod[=URLs]:: Specify debuginfod URL to be used when cacheing perf.data binaries, it follows the same syntax as the DEBUGINFOD_URLS variable, like: @@ -768,6 +779,8 @@ include::intel-hybrid.txt[] only, as of now. So the applications built without the frame pointer might see bogus addresses. +include::intel-hybrid.txt[] + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-intel-pt[1] |