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| author | Leo Yan <leo.yan@arm.com> | 2025-12-12 20:25:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2026-01-20 23:31:28 +0300 |
| commit | dc7fb075f7de33ee78a2133598215af6a87d7ab3 (patch) | |
| tree | 27f64326448b3587daeabf2eea70da0bf5fec3ec /tools | |
| parent | e524dda49340cb973c95fdfd6aa700eeb67aa128 (diff) | |
| download | linux-dc7fb075f7de33ee78a2133598215af6a87d7ab3.tar.xz | |
perf c2c: Update documentation for adding memory event table
Users may occasionally need to see which options are applied to memory
events.
This helps to understand the behavior of "perf c2c" and "perf mem", and
provides guidance for configuring memory event options directly.
Add a table to track memory events and their corresponding options, and
include the Arm SPE events in it.
Suggested-by: Al Grant <al.grant@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-c2c.txt | 51 |
1 files changed, 37 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-c2c.txt b/tools/perf/Documentation/perf-c2c.txt index 40b0f71a2c44..e57a122b8719 100644 --- a/tools/perf/Documentation/perf-c2c.txt +++ b/tools/perf/Documentation/perf-c2c.txt @@ -160,20 +160,43 @@ Following perf record options are configured by default: -W,-d,--phys-data,--sample-cpu -Unless specified otherwise with '-e' option, following events are monitored by -default on Intel: - - cpu/mem-loads,ldlat=30/P - cpu/mem-stores/P - -following on AMD: - - ibs_op// - -and following on PowerPC: - - cpu/mem-loads/ - cpu/mem-stores/ +The following table lists the events monitored on different architectures. +Unless specified otherwise with the -e option, the tool will select the +default events. + + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | Arch | Configuration | Options | Events | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | Intel | Default | -e ldlat-loads | cpu/mem-loads,ldlat=30/P | + | | | -e ldlat-stores | cpu/mem-stores/P | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Load only | -e ldlat-loads | cpu/mem-loads,ldlat=30/P | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Store only | -e ldlat-stores | cpu/mem-stores/P | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | Intel | Default | -e ldlat-loads | {cpu/mem-loads-aux/,cpu/mem-loads,ldlat=30/}:P | + | with | | -e ldlat-stores | cpu/mem-stores/P | + | AUX |--------------+------------------+--------------------------------------------------------------------------------+ + | | Load only | -e ldlat-loads | {cpu/mem-loads-aux/,cpu/mem-loads,ldlat=30/}:P | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Store only | -e ldlat-stores | cpu/mem-stores/P | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | AMD | Default | -e mem-ldst | ibs_op// (without latency support) | + | | | | ibs_op/ldlat=30/ (with latency support) | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | PowerPC| Default | -e ldlat-loads | cpu/mem-loads/ | + | | | -e ldlat-stores | cpu/mem-stores/ | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Load only | -e ldlat-loads | cpu/mem-loads/ | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Store only | -e ldlat-stores | cpu/mem-stores/ | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ + | Arm | Default | -e spe-ldst | arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,store_filter=1,min_latency=30/ | + | SPE |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Load only | -e spe-load | arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,min_latency=30/ | + | |---------------+-----------------+--------------------------------------------------------------------------------+ + | | Store only | -e spe-store | arm_spe_0/ts_enable=1,pa_enable=1,store_filter=1/ | + +--------+---------------+-----------------+--------------------------------------------------------------------------------+ User can pass any 'perf record' option behind '--' mark, like (to enable callchains and system wide monitoring): |