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perf smt: Compute SMT from topology

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The topology records sibling threads. Rather than computing SMT using
siblings in sysfs, reuse the values in topology. This only applies
when the file smt/active isn't available.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kshipra Bopardikar <kshipra.bopardikar@intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20220831174926.579643-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2022-08-31 10:49:22 -07:00
committed by Arnaldo Carvalho de Melo
parent 1a6abdde13
commit 09b73fe9e3
6 changed files with 48 additions and 100 deletions
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9
tools/perf/util/expr.c
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@@ -412,11 +412,6 @@ double expr__get_literal(const char *literal)
static struct cpu_topology *topology;
double result = NAN;
if (!strcasecmp("#smt_on", literal)) {
result = smt_on() > 0 ? 1.0 : 0.0;
goto out;
}
if (!strcmp("#num_cpus", literal)) {
result = cpu__max_present_cpu().cpu;
goto out;
@@ -440,6 +435,10 @@ double expr__get_literal(const char *literal)
goto out;
}
}
if (!strcasecmp("#smt_on", literal)) {
result = smt_on(topology) ? 1.0 : 0.0;
goto out;
}
if (!strcmp("#num_packages", literal)) {
result = topology->package_cpus_lists;
goto out;