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Diffstat (limited to '')
| -rw-r--r-- | tools/perf/Documentation/perf-stat.txt | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 7e6fb7cbc0f4..d7ff1867feda 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -36,8 +36,10 @@ report:: - a symbolic event name (use 'perf list' to list all events) - - a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a - hexadecimal event descriptor. + - a raw PMU event in the form of rN where N is a hexadecimal value + that represents the raw register encoding with the layout of the + event control registers as described by entries in + /sys/bus/event_source/devices/cpu/format/*. - a symbolic or raw PMU event followed by an optional colon and a list of event modifiers, e.g., cpu-cycles:p. See the @@ -452,6 +454,16 @@ Multiple events are created from a single event specification when: 2. Aliases, which are listed immediately after the Kernel PMU events by perf list, are used. +--hybrid-merge:: +Merge the hybrid event counts from all PMUs. + +For hybrid events, by default, the stat aggregates and reports the event +counts per PMU. But sometimes, it's also useful to aggregate event counts +from all PMUs. This option enables that behavior and reports the counts +without PMUs. + +For non-hybrid events, it should be no effect. + --smi-cost:: Measure SMI cost if msr/aperf/ and msr/smi/ events are supported. @@ -493,6 +505,10 @@ This option can be enabled in perf config by setting the variable $ perf config stat.no-csv-summary=true +--cputype:: +Only enable events on applying cpu with this type for hybrid platform +(e.g. core or atom)" + EXAMPLES -------- @@ -554,6 +570,27 @@ Additional metrics may be printed with all earlier fields being empty. include::intel-hybrid.txt[] +JSON FORMAT +----------- + +With -j, perf stat is able to print out a JSON format output +that can be used for parsing. + +- timestamp : optional usec time stamp in fractions of second (with -I) +- optional aggregate options: + - core : core identifier (with --per-core) + - die : die identifier (with --per-die) + - socket : socket identifier (with --per-socket) + - node : node identifier (with --per-node) + - thread : thread identifier (with --per-thread) +- counter-value : counter value +- unit : unit of the counter value or empty +- event : event name +- variance : optional variance if multiple values are collected (with -r) +- runtime : run time of counter +- metric-value : optional metric value +- metric-unit : optional unit of metric + SEE ALSO -------- linkperf:perf-top[1], linkperf:perf-list[1] |