Messages in this thread Patch in this message | | | Subject | [PATCH v5 4/4] perf record: implement --affinity=node|cpu option | From | Alexey Budankov <> | Date | Tue, 22 Jan 2019 20:52:03 +0300 |
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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> --- Changes in v5: - reduced indentation at record__parse_affinity()
Changes in v3: - adjusted indentation at record__parse_affinity() --- tools/perf/Documentation/perf-record.txt | 5 +++++ tools/perf/builtin-record.c | 18 ++++++++++++++++++ 2 files changed, 23 insertions(+)
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index d232b13ea713..efb839784f32 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -440,6 +440,11 @@ 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 142d109bc53d..c2a18261e595 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1665,6 +1665,21 @@ 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) @@ -1973,6 +1988,9 @@ 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() };
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