diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/smt.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c index 8481842e9edb..20bacd5972ad 100644 --- a/tools/perf/util/smt.c +++ b/tools/perf/util/smt.c @@ -15,6 +15,9 @@ int smt_on(void) if (cached) return cached_result; + if (sysfs__read_int("devices/system/cpu/smt/active", &cached_result) > 0) + goto done; + ncpu = sysconf(_SC_NPROCESSORS_CONF); for (cpu = 0; cpu < ncpu; cpu++) { unsigned long long siblings; @@ -42,6 +45,7 @@ int smt_on(void) } if (!cached) { cached_result = 0; +done: cached = true; } return cached_result; |