diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 18 |
2 files changed, 23 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 02b4aa2621e7..8f0c2be34848 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -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 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:: Configure all used events to run in kernel space. diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 3fdfbaebd95e..6c3719ac901d 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -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() }; |