Messages in this thread Patch in this message | | | Date | Tue, 23 Nov 2021 16:12:31 -0800 | Subject | [PATCH v2 4/4] perf tools: Probe non-deprecated sysfs path 1st | From | Ian Rogers <> |
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Following Documentation/ABI/stable/sysfs-devices-system-cpu the /sys/devices/system/cpu/cpuX/topology/core_cpus is deprecated in favor of thread_siblings, so probe thread_siblings before falling back on core_cpus.
Signed-off-by: Ian Rogers <irogers@google.com> --- tools/perf/util/smt.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c index 2636be65305a..2b0a36ebf27a 100644 --- a/tools/perf/util/smt.c +++ b/tools/perf/util/smt.c @@ -79,11 +79,10 @@ int smt_on(void) char fn[256]; snprintf(fn, sizeof fn, - "devices/system/cpu/cpu%d/topology/core_cpus", cpu); + "devices/system/cpu/cpu%d/topology/thread_siblings", cpu); if (sysfs__read_str(fn, &str, &strlen) < 0) { snprintf(fn, sizeof fn, - "devices/system/cpu/cpu%d/topology/thread_siblings", - cpu); + "devices/system/cpu/cpu%d/topology/core_cpus", cpu); if (sysfs__read_str(fn, &str, &strlen) < 0) continue; } -- 2.34.0.rc2.393.gf8c9666880-goog
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