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| -rw-r--r-- | tools/perf/Documentation/perf-arm-spe.txt | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-arm-spe.txt b/tools/perf/Documentation/perf-arm-spe.txt index 37afade4f1b2..cda8dd47fc4d 100644 --- a/tools/perf/Documentation/perf-arm-spe.txt +++ b/tools/perf/Documentation/perf-arm-spe.txt @@ -191,14 +191,20 @@ groups: 36 branch 0 remote-access 900 memory + 1800 instructions The arm_spe// and dummy:u events are implementation details and are expected to be empty. -To get a full list of unique samples that are not sorted into groups, set the itrace option to -generate 'instruction' samples. The period option is also taken into account, so set it to 1 -instruction unless you want to further downsample the already sampled SPE data: +The instructions group contains the full list of unique samples that are not +sorted into other groups. To generate only this group use --itrace=i1i. - perf report --itrace=i1i +1i (1 instruction interval) signifies no further downsampling. Rather than an +instruction interval, this generates a sample every n SPE samples. For example +to generate the default set of events for every 100 SPE samples: + + perf report --itrace==bxofmtMai100i + +Other period types, for example nanoseconds (ns) are not currently supported. Memory access details are also stored on the samples and this can be viewed with: |