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| author |  Ian Rogers <irogers@google.com>
| 2023-02-19 01:28:04 -0800 |
|---|---|---|
| committer |  Arnaldo Carvalho de Melo <acme@redhat.com>
| 2023-02-19 08:03:12 -0300 |
| commit | 207f7df7271c346da4a421c5b8cdadda99a37964 (patch) | |
| tree | 4b052c06d0da8aafe18c92efe4f22266dab7d7c0 /tools/perf/util/smt.h | |
| parent | perf pmu-events: Change perpkg to be a bool (diff) | |
| download | linux-207f7df7271c346da4a421c5b8cdadda99a37964.tar.gz linux-207f7df7271c346da4a421c5b8cdadda99a37964.tar.bz2 linux-207f7df7271c346da4a421c5b8cdadda99a37964.zip | |
perf expr: Make the online topology accessible globally
Knowing the topology of online CPUs is useful for more than just expr
literals. Move to a global function that caches the value. An
additional upside is that this may also avoid computing the CPU
topology in some situations.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Link: https://lore.kernel.org/r/20230219092848.639226-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/smt.h')
| -rw-r--r-- | tools/perf/util/smt.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/tools/perf/util/smt.h b/tools/perf/util/smt.h index ae9095f2c38c..01441fd2c0a2 100644 --- a/tools/perf/util/smt.h +++ b/tools/perf/util/smt.h @@ -2,16 +2,16 @@ #ifndef __SMT_H #define __SMT_H 1 -struct cpu_topology; - -/* Returns true if SMT (aka hyperthreading) is enabled. */ -bool smt_on(const struct cpu_topology *topology); +/* + * Returns true if SMT (aka hyperthreading) is enabled. Determined via sysfs or + * the online topology. + */ +bool smt_on(void); /* * Returns true when system wide and all SMT threads for a core are in the * user_requested_cpus map. */ -bool core_wide(bool system_wide, const char *user_requested_cpu_list, - const struct cpu_topology *topology); +bool core_wide(bool system_wide, const char *user_requested_cpu_list); #endif /* __SMT_H */ |