Extend the -m option so that the number of mmap pages for Instruction Tracing can be specified.
Signed-off-by: Adrian Hunter <[email protected]> --- tools/perf/Documentation/perf-record.txt | 2 ++ tools/perf/builtin-record.c | 49 ++++++++++++++++++++++++++++++-- tools/perf/util/evlist.c | 10 +++++-- tools/perf/util/evlist.h | 1 + 4 files changed, 56 insertions(+), 6 deletions(-) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index af9a54e..a5f2096 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -91,6 +91,8 @@ OPTIONS Number of mmap data pages (must be a power of two) or size specification with appended unit character - B/K/M/G. The size is rounded up to have nearest pages power of two value. + Also, by adding a comma, the number of mmap pages for Instruction + Tracing can be specified. -g:: Enables call-graph (stack chain/backtrace) recording. diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index ab8cd02..95519e3 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -751,6 +751,49 @@ static int perf_record_config(const char *var, const char *value, void *cb) return perf_default_config(var, value, cb); } +static int record__parse_mmap_pages(const struct option *opt, + const char *str, + int unset __maybe_unused) +{ + struct record_opts *opts = opt->value; + char *s, *p; + unsigned int mmap_pages; + int ret; + + if (!str) + return -EINVAL; + + s = strdup(str); + if (!s) + return -ENOMEM; + + p = strchr(s, ','); + if (p) + *p = '\0'; + + if (*s) { + ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); + if (ret) + goto out_free; + opts->mmap_pages = mmap_pages; + } + + if (!p) { + ret = 0; + goto out_free; + } + + ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); + if (ret) + goto out_free; + + opts->itrace_mmap_pages = mmap_pages; + +out_free: + free(s); + return ret; +} + static const char * const __record_usage[] = { "perf record [<options>] [<command>]", "perf record [<options>] -- <command> [<options>]", @@ -824,9 +867,9 @@ struct option __record_options[] = { &record.opts.no_inherit_set, "child tasks do not inherit counters"), OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), - OPT_CALLBACK('m', "mmap-pages", &record.opts.mmap_pages, "pages", - "number of mmap data pages", - perf_evlist__parse_mmap_pages), + OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", + "number of mmap data pages and instruction tracing mmap pages", + record__parse_mmap_pages), OPT_BOOLEAN(0, "group", &record.opts.group, "put the counters into a counter group"), OPT_CALLBACK_NOOPT('g', NULL, &record.opts, diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index e363cfe..fa0681b 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -985,10 +985,8 @@ static long parse_pages_arg(const char *str, unsigned long min, return pages; } -int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, - int unset __maybe_unused) +int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) { - unsigned int *mmap_pages = opt->value; unsigned long max = UINT_MAX; long pages; @@ -1005,6 +1003,12 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, return 0; } +int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + return __perf_evlist__parse_mmap_pages(opt->value, str); +} + /** * perf_evlist__mmap_ex - Create mmaps to receive events. * @evlist: list of events diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 0f1e716..5bdb8a5 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -121,6 +121,7 @@ int perf_evlist__start_workload(struct perf_evlist *evlist); struct option; +int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
