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authorJiri Olsa <jolsa@kernel.org>2017-01-09 12:51:55 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-01-11 22:48:01 +0300
commit9808143ba2e54818a3cf445d9b69b3f5f15451ee (patch)
tree00c2425c5e06608fda53fc24d875cd4e1dabce63 /tools/perf/util/util.c
parente978be9ea2990f1af60fe10eadd2312a6250e0b8 (diff)
downloadlinux-9808143ba2e54818a3cf445d9b69b3f5f15451ee.tar.xz
perf tools: Add unit_number__scnprintf function
Add unit_number__scnprintf function to display size units and use it in -m option info message. Before: $ perf record -m 10M ls rounding mmap pages size to 16777216 bytes (4096 pages) ... After: $ perf record -m 10M ls rounding mmap pages size to 16M (4096 pages) ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1483955520-29063-2-git-send-email-jolsa@kernel.org [ Rename it to unit_number__scnprintf for consistency ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.c')
-rw-r--r--tools/perf/util/util.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9ddd98827d12..bf29aed16bd6 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -789,3 +789,16 @@ int is_printable_array(char *p, unsigned int len)
}
return 1;
}
+
+int unit_number__scnprintf(char *buf, size_t size, u64 n)
+{
+ char unit[4] = "BKMG";
+ int i = 0;
+
+ while (((n / 1024) > 1) && (i < 3)) {
+ n /= 1024;
+ i++;
+ }
+
+ return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
+}