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| author |   Andi Kleen <ak@linux.intel.com> | 2019-11-20 16:15:20 -0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-11-29 12:20:45 -0300 |
| commit | 4b49ab708d1804bc8b2fcdde79844b8bc98f7ef6 (patch) | |
| tree | cb714fa37caf1dd17546d4512d14c3913ca19414 /tools/perf/util | |
| parent | perf stat: Use affinity for opening events (diff) | |
| download | linux-dev-4b49ab708d1804bc8b2fcdde79844b8bc98f7ef6.tar.xz linux-dev-4b49ab708d1804bc8b2fcdde79844b8bc98f7ef6.zip | |
perf stat: Use affinity for reading
Restructure event reading to use affinity to minimize the number of IPIs
needed.
Before on a large test case with 94 CPUs:
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
3.16 0.106079 4 22082 read
After:
3.43 0.081295 3 22082 read
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20191121001522.180827-11-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/evsel.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index ca82a93960cd..c8af4bc23f8f 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -86,6 +86,7 @@ struct evsel { struct list_head config_terms; struct bpf_object *bpf_obj; int bpf_fd; + int err; bool auto_merge_stats; bool merged_stat; const char * metric_expr; |