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| author | Jiri Olsa <jolsa@redhat.com> | 2013-09-01 12:36:13 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-10-09 16:24:20 +0200 |
| commit | 27050f530dc4fd88dc93d85c177e000efe970d12 (patch) | |
| tree | 2d73d0b265fb05f74c2dfb00a83ee0241c736097 /tools/perf/util/util.h | |
| parent | perf tools: Check mmap pages value early (diff) | |
| download | linux-27050f530dc4fd88dc93d85c177e000efe970d12.tar.xz linux-27050f530dc4fd88dc93d85c177e000efe970d12.zip | |
perf tools: Add possibility to specify mmap size
Adding possibility to specify mmap size via -m/--mmap-pages
by appending unit size character (B/K/M/G) to the
number, like:
$ perf record -m 8K ls
$ perf record -m 2M ls
The size is rounded up appropriately to follow perf
mmap restrictions.
If no unit is specified the number provides pages as
of now, like:
$ perf record -m 8 ls
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1378031796-17892-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.h')
| -rw-r--r-- | tools/perf/util/util.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index a53535949043..c29ecaabf461 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -270,6 +270,13 @@ bool is_power_of_2(unsigned long n) return (n != 0 && ((n & (n - 1)) == 0)); } +static inline unsigned next_pow2(unsigned x) +{ + if (!x) + return 1; + return 1ULL << (32 - __builtin_clz(x - 1)); +} + size_t hex_width(u64 v); int hex2u64(const char *ptr, u64 *val); @@ -281,4 +288,11 @@ void dump_stack(void); extern unsigned int page_size; void get_term_dimensions(struct winsize *ws); + +struct parse_tag { + char tag; + int mult; +}; + +unsigned long parse_tag_value(const char *str, struct parse_tag *tags); #endif /* GIT_COMPAT_UTIL_H */ |