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| author | Kan Liang <kan.liang@linux.intel.com> | 2019-06-04 15:50:44 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-06-10 16:20:11 -0300 |
| commit | 0ccdb8407a4660f6dbc5977bc060917d2c3e7986 (patch) | |
| tree | d61c5d3ac8428f3d54deebcf1238703ae98f739d /tools/perf/util/smt.c | |
| parent | e05a899718f094e2c87d99115c5b1191405a9fd0 (diff) | |
| download | linux-stable-0ccdb8407a4660f6dbc5977bc060917d2c3e7986.tar.gz linux-stable-0ccdb8407a4660f6dbc5977bc060917d2c3e7986.tar.bz2 linux-stable-0ccdb8407a4660f6dbc5977bc060917d2c3e7986.zip | |
perf tools: Apply new CPU topology sysfs attributes
The existing "thread_siblings" and "thread_siblings_list" attribute will
be deprecated.
Use the new CPU topology sysfs attributes, "core_cpus" and
"core_cpus_list", which are synonymous with the deprecated attributes.
Check the new name first. If not available, use the deprecated name to
be compatible with old kernel.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1559688644-106558-5-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/smt.c')
| -rw-r--r-- | tools/perf/util/smt.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c index 453f6f6f29f3..3b791ef2cd50 100644 --- a/tools/perf/util/smt.c +++ b/tools/perf/util/smt.c @@ -23,8 +23,12 @@ int smt_on(void) char fn[256]; snprintf(fn, sizeof fn, - "devices/system/cpu/cpu%d/topology/thread_siblings", - cpu); + "devices/system/cpu/cpu%d/topology/core_cpus", cpu); + if (access(fn, F_OK) == -1) { + snprintf(fn, sizeof fn, + "devices/system/cpu/cpu%d/topology/thread_siblings", + cpu); + } if (sysfs__read_str(fn, &str, &strlen) < 0) continue; /* Entry is hex, but does not have 0x, so need custom parser */ |