diff options
| author | Ian Rogers <[email protected]> | 2021-11-23 16:12:29 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2021-12-06 21:57:53 -0300 |
| commit | 4ffbe87e2d5b53bcb0213d8650bbe70bf942de6a (patch) | |
| tree | c8174f3d060de93c0b61b5f497cd19c136d9ced8 | |
| parent | cba43fcf7aaf8369f80aac26cc2c50232c065a9e (diff) | |
perf tools: Fix SMT detection fast read path
sysfs__read_int() returns 0 on success, and so the fast read path was
always failing.
Fixes: bb629484d924118e ("perf tools: Simplify checking if SMT is active.")
Signed-off-by: Ian Rogers <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John Garry <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Clarke <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/smt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c index 20bacd5972ad..34f1b1b1176c 100644 --- a/tools/perf/util/smt.c +++ b/tools/perf/util/smt.c @@ -15,7 +15,7 @@ int smt_on(void) if (cached) return cached_result; - if (sysfs__read_int("devices/system/cpu/smt/active", &cached_result) > 0) + if (sysfs__read_int("devices/system/cpu/smt/active", &cached_result) >= 0) goto done; ncpu = sysconf(_SC_NPROCESSORS_CONF); |