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author | 2019-12-03 14:44:18 +0300 | |
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committer | 2020-01-06 11:46:09 -0300 | |
commit | 9c080c0279a80057cad3dfc05d09fb283ddf72f4 (patch) | |
tree | 96465c24a3314f18156fbc058a6bd6cdfa6ecf25 /tools/perf/util/mmap.c | |
parent | tools bitmap: Implement bitmap_equal() operation at bitmap API (diff) | |
download | linux-9c080c0279a80057cad3dfc05d09fb283ddf72f4.tar.gz linux-9c080c0279a80057cad3dfc05d09fb283ddf72f4.tar.bz2 linux-9c080c0279a80057cad3dfc05d09fb283ddf72f4.zip |
perf mmap: Declare type for cpu mask of arbitrary length
Declare a dedicated struct map_cpu_mask type for cpu masks of arbitrary
length.
The mask is available thru bits pointer and the mask length is kept in
nbits field. MMAP_CPU_MASK_BYTES() macro returns mask storage size in
bytes.
The mmap_cpu_mask__scnprintf() function can be used to log text
representation of the mask.
Committer notes:
To print the 'nbits' struct member we must use %zd, since it is a
size_t, this fixes the build in some toolchains/arches.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/0fd2454f-477f-d15a-f4ee-79bcbd2585ff@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/mmap.c')
-rw-r--r-- | tools/perf/util/mmap.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c index 063d1b93c53d..2ee4faacca21 100644 --- a/tools/perf/util/mmap.c +++ b/tools/perf/util/mmap.c @@ -23,6 +23,18 @@ #include "mmap.h" #include "../perf.h" #include <internal/lib.h> /* page_size */ +#include <linux/bitmap.h> + +#define MASK_SIZE 1023 +void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag) +{ + char buf[MASK_SIZE + 1]; + size_t len; + + len = bitmap_scnprintf(mask->bits, mask->nbits, buf, MASK_SIZE); + buf[len] = '\0'; + pr_debug("%p: %s mask[%zd]: %s\n", mask, tag, mask->nbits, buf); +} size_t mmap__mmap_len(struct mmap *map) { |