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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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5
tools/perf/Documentation/perf-record.txt
View file

@ -454,6 +454,11 @@ Use <n> control blocks in asynchronous (Posix AIO) trace writing mode (default:
Asynchronous mode is supported only when linking Perf tool with libc library Asynchronous mode is supported only when linking Perf tool with libc library
providing implementation for Posix AIO API. providing implementation for Posix AIO API.
--affinity=mode::
Set affinity mask of trace reading thread according to the policy defined by 'mode' value:
node - thread affinity mask is set to NUMA node cpu mask of the processed mmap buffer
cpu - thread affinity mask is set to cpu of the processed mmap buffer
--all-kernel:: --all-kernel::
Configure all used events to run in kernel space. Configure all used events to run in kernel space.

18
tools/perf/builtin-record.c
View file

@ -1656,6 +1656,21 @@ static int parse_clockid(const struct option *opt, const char *str, int unset)
return -1; 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, static int record__parse_mmap_pages(const struct option *opt,
const char *str, const char *str,
int unset __maybe_unused) 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)", &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)",
record__aio_parse), record__aio_parse),
#endif #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() OPT_END()
}; };