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This patch adds support for "--per-cache" option for aggregation at a
particular cache level and documents the same.
Following is the output of 'perf stat' with aggregation at L3 for the
event "ls_dmnd_fills_from_sys.ext_cache_remote" on a dual socket 3rd
Generation EPYC Processor (2 x 64C/128T - 16 LLCs) when running
hackbench pinned to 4 LLCs:
$ sudo perf stat --per-cache=L3 -a -e ls_dmnd_fills_from_sys.ext_cache_remote -- \
taskset -c 0-15,64-79,128-143,192-207 \
perf bench sched messaging -p -t -l 100000 -g 8
...
Performance counter stats for 'system wide':
S0-D0-L3-ID0 16 9,500,803 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID8 16 6,338,099 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID16 16 355,005 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID24 16 22,067 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID32 16 16,321 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID40 16 11,619 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID48 16 4,238 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID56 16 31,158 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID64 16 28,242,452 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID72 16 22,906,973 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID80 16 72,898 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID88 16 56,907 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID96 16 20,456 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID104 16 40,913 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID112 16 78,113 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID120 16 37,897 ls_dmnd_fills_from_sys.ext_cache_remote
Also support 'perf stat record' and 'perf stat report' with the ability
to specify a different cache level to aggregate data at when running
'perf stat report'.
$ sudo perf stat record --per-cache=L2 -a -e ls_dmnd_fills_from_sys.ext_cache_remote -- \
taskset -c 0-15,64-79,128-143,192-207 \
perf bench sched messaging -p -t -l 100000 -g 8
...
Performance counter stats for 'system wide':
S0-D0-L2-ID0 2 1,442,061 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID1 2 1,548,994 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID2 2 1,553,557 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID3 2 1,420,122 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID4 2 1,465,461 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID5 2 1,455,153 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID6 2 1,595,237 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID7 2 1,499,321 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L2-ID8 2 1,919,025 ls_dmnd_fills_from_sys.ext_cache_remote
...
S1-D1-L2-ID127 2 21,295 ls_dmnd_fills_from_sys.ext_cache_remote
$ sudo perf stat report --per-cache=L3
Performance counter stats for 'perf stat record --per-cache=L2 -a -e ls_dmnd_fills_from_sys.ext_cache_remote --\
taskset -c 0-15,64-79,128-143,192-207 \
perf bench sched messaging -p -t -l 100000 -g 8':
S0-D0-L3-ID0 16 11,979,906 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID8 16 14,257,202 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID16 16 377,484 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID24 16 27,224 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID32 16 26,816 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID40 16 14,461 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID48 16 10,499 ls_dmnd_fills_from_sys.ext_cache_remote
S0-D0-L3-ID56 16 53,817 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID64 16 27,361,987 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID72 16 37,299,024 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID80 16 84,125 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID88 16 64,561 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID96 16 13,403 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID104 16 20,138 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID112 16 93,220 ls_dmnd_fills_from_sys.ext_cache_remote
S1-D1-L3-ID120 16 35,465 ls_dmnd_fills_from_sys.ext_cache_remote
On the above system, the domain covered by S0-D0-L3-ID0 contains
S0-D0-L2-ID0 to S0-D0-L2-ID7, the corresponding count for L3-ID0 is
equal to the sum of counts for L2-ID0 to L2-ID7.
Add documentation for the newly introduced "--per-cache" option.
Suggested-by: Gautham Shenoy <gautham.shenoy@amd.com>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wen Pu <puwen@hygon.cn>
Link: https://lore.kernel.org/r/20230517172745.5833-5-kprateek.nayak@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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| .. | ||
| android.txt | ||
| arm-coresight.txt | ||
| asciidoc.conf | ||
| asciidoctor-extensions.rb | ||
| build-docdep.perl | ||
| build-xed.txt | ||
| Build.txt | ||
| callchain-overhead-calculation.txt | ||
| cat-texi.perl | ||
| db-export.txt | ||
| examples.txt | ||
| guest-files.txt | ||
| guestmount.txt | ||
| intel-bts.txt | ||
| intel-hybrid.txt | ||
| intel-pt.txt | ||
| itrace.txt | ||
| jit-interface.txt | ||
| jitdump-specification.txt | ||
| Makefile | ||
| manpage-1.72.xsl | ||
| manpage-base.xsl | ||
| manpage-bold-literal.xsl | ||
| manpage-normal.xsl | ||
| manpage-suppress-sp.xsl | ||
| perf-annotate.txt | ||
| perf-archive.txt | ||
| perf-arm-spe.txt | ||
| perf-bench.txt | ||
| perf-buildid-cache.txt | ||
| perf-buildid-list.txt | ||
| perf-c2c.txt | ||
| perf-config.txt | ||
| perf-daemon.txt | ||
| perf-data.txt | ||
| perf-diff.txt | ||
| perf-dlfilter.txt | ||
| perf-evlist.txt | ||
| perf-ftrace.txt | ||
| perf-help.txt | ||
| perf-inject.txt | ||
| perf-intel-pt.txt | ||
| perf-iostat.txt | ||
| perf-kallsyms.txt | ||
| perf-kmem.txt | ||
| perf-kvm.txt | ||
| perf-kwork.txt | ||
| perf-list.txt | ||
| perf-lock.txt | ||
| perf-mem.txt | ||
| perf-probe.txt | ||
| perf-record.txt | ||
| perf-report.txt | ||
| perf-sched.txt | ||
| perf-script-perl.txt | ||
| perf-script-python.txt | ||
| perf-script.txt | ||
| perf-stat.txt | ||
| perf-test.txt | ||
| perf-timechart.txt | ||
| perf-top.txt | ||
| perf-trace.txt | ||
| perf-version.txt | ||
| perf.data-directory-format.txt | ||
| perf.data-file-format.txt | ||
| perf.txt | ||
| perfconfig.example | ||
| security.txt | ||
| tips.txt | ||
| topdown.txt | ||