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perf expr: Add metric literals for topology.

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Allow the number of cpus, cores, dies and packages to be queried by a
metric expression.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul A . Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Song Liu <song@kernel.org>
Cc: Wan Jiabing <wanjiabing@vivo.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20211111002109.194172-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2021-11-10 16:21:07 -08:00
committed by Arnaldo Carvalho de Melo
parent 3613f6c118
commit fdf1e29b61
2 changed files with 38 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
tools/perf/util/expr.c
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@@ -5,6 +5,8 @@
#include <stdlib.h>
#include <string.h>
#include "metricgroup.h"
#include "cpumap.h"
#include "cputopo.h"
#include "debug.h"
#include "expr.h"
#include "expr-bison.h"
@@ -375,9 +377,34 @@ double expr_id_data__value(const struct expr_id_data *data)
double expr__get_literal(const char *literal)
{
static struct cpu_topology *topology;
if (!strcmp("#smt_on", literal))
return smt_on() > 0 ? 1.0 : 0.0;
if (!strcmp("#num_cpus", literal))
return cpu__max_present_cpu();
/*
* Assume that topology strings are consistent, such as CPUs "0-1"
* wouldn't be listed as "0,1", and so after deduplication the number of
* these strings gives an indication of the number of packages, dies,
* etc.
*/
if (!topology) {
topology = cpu_topology__new();
if (!topology) {
pr_err("Error creating CPU topology");
return NAN;
}
}
if (!strcmp("#num_packages", literal))
return topology->package_cpus_lists;
if (!strcmp("#num_dies", literal))
return topology->die_cpus_lists;
if (!strcmp("#num_cores", literal))
return topology->core_cpus_lists;
pr_err("Unrecognized literal '%s'", literal);
return NAN;
}