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authorWang Nan <wangnan0@huawei.com>2016-04-13 11:21:05 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-04-14 14:57:54 +0300
commit040f9915e99e604688c2880e0b1e5b59dbfefa54 (patch)
tree6858dd65055154cea586357070020614c75333e7 /tools/perf/util/data.h
parentb26dc73018d2e3a68cad0cf0bad902a8637f9bdf (diff)
downloadlinux-040f9915e99e604688c2880e0b1e5b59dbfefa54.tar.xz
perf data: Add perf_data_file__switch() helper
perf_data_file__switch() closes current output file, renames it, then open a new one to continue recording. It will be used by 'perf record' to split output into multiple perf.data files. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-3-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/data.h')
-rw-r--r--tools/perf/util/data.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index 2b15d0c95c7f..ae510ce16cb1 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -46,5 +46,14 @@ int perf_data_file__open(struct perf_data_file *file);
void perf_data_file__close(struct perf_data_file *file);
ssize_t perf_data_file__write(struct perf_data_file *file,
void *buf, size_t size);
-
+/*
+ * If at_exit is set, only rename current perf.data to
+ * perf.data.<postfix>, continue write on original file.
+ * Set at_exit when flushing the last output.
+ *
+ * Return value is fd of new output.
+ */
+int perf_data_file__switch(struct perf_data_file *file,
+ const char *postfix,
+ size_t pos, bool at_exit);
#endif /* __PERF_DATA_H */