diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-02-03 11:53:14 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-03 09:03:59 +0100 |
| commit | b8f46c5a34fa64fd456295388d18f50ae69d9f37 (patch) | |
| tree | cba5da0bb3e4ca5c450df8aaa53fc74945c6fd28 /tools/perf/util/session.c | |
| parent | 59f411b62c9282891274e721fea29026b0eda3cc (diff) | |
perf tools: Use O_LARGEFILE to open perf data file
Open perf data file with O_LARGEFILE flag since its size is
easily larger that 2G.
For example:
# rm -rf perf.data
# ./perf kmem record sleep 300
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 3142.147 MB perf.data
(~137282513 samples) ]
# ll -h perf.data
-rw------- 1 root root 3.1G .....
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B68F32A.9040203@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/session.c')
| -rw-r--r-- | tools/perf/util/session.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 8e7c1896eaa..cf91d099f0a 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1,3 +1,6 @@ +#define _LARGEFILE64_SOURCE +#define _FILE_OFFSET_BITS 64 + #include <linux/kernel.h> #include <byteswap.h> @@ -12,7 +15,7 @@ static int perf_session__open(struct perf_session *self, bool force) { struct stat input_stat; - self->fd = open(self->filename, O_RDONLY); + self->fd = open(self->filename, O_RDONLY|O_LARGEFILE); if (self->fd < 0) { pr_err("failed to open file: %s", self->filename); if (!strcmp(self->filename, "perf.data")) |