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perf record: Implement --affinity=node|cpu option

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Implement --affinity=node|cpu option for the record mode defaulting
to system affinity mask bouncing.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/083f5422-ece9-10dd-8305-bf59c860f10f@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov
2019-01-22 20:52:03 +03:00
committed by Arnaldo Carvalho de Melo
parent af63147c1e
commit f4fe11b7bf
2 changed files with 23 additions and 0 deletions
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18
tools/perf/builtin-record.c
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@@ -1656,6 +1656,21 @@ static int parse_clockid(const struct option *opt, const char *str, int unset)
return -1;
}
static int record__parse_affinity(const struct option *opt, const char *str, int unset)
{
struct record_opts *opts = (struct record_opts *)opt->value;
if (unset || !str)
return 0;
if (!strcasecmp(str, "node"))
opts->affinity = PERF_AFFINITY_NODE;
else if (!strcasecmp(str, "cpu"))
opts->affinity = PERF_AFFINITY_CPU;
return 0;
}
static int record__parse_mmap_pages(const struct option *opt,
const char *str,
int unset __maybe_unused)
@@ -1964,6 +1979,9 @@ static struct option __record_options[] = {
&nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)",
record__aio_parse),
#endif
OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu",
"Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer",
record__parse_affinity),
OPT_END()
};