Messages in this thread Patch in this message | | | Date | Tue, 23 Nov 2021 16:12:29 -0800 | Subject | [PATCH v2 2/4] perf tools: Fix SMT not detected | From | Ian Rogers <> |
| |
sysfs__read_int returns 0 on success, and so the fast read path was always failing.
Fixes: bb629484d924 (perf tools: Simplify checking if SMT is active.) Signed-off-by: Ian Rogers <irogers@google.com> --- tools/perf/util/smt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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); -- 2.34.0.rc2.393.gf8c9666880-goog
| |