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authorAndi Kleen <ak@linux.intel.com>2019-11-20 16:15:20 -0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-11-29 12:20:45 -0300
commit4b49ab708d1804bc8b2fcdde79844b8bc98f7ef6 (patch)
treecb714fa37caf1dd17546d4512d14c3913ca19414 /tools/perf/util/evsel.h
parentperf stat: Use affinity for opening events (diff)
downloadlinux-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 '')
-rw-r--r--tools/perf/util/evsel.h1
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;