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authorTom Zanussi <tzanussi@gmail.com>2010-04-01 23:59:15 -0500
committerIngo Molnar <mingo@elte.hu>2010-04-14 11:56:05 +0200
commit8dc58101f2c838355d44402aa77646649d10dbec (patch)
treed4cc08cccfec56d37dee4c4b2383ffe56d176494 /tools/perf/util/header.h
parentc05556421742eb47f80301767653a4bcb19de9de (diff)
perf: Add pipe-specific header read/write and event processing code
This patch makes several changes to allow the perf event stream to be sent and received over a pipe: - adds pipe-specific versions of the header read/write code - adds pipe-specific version of the event processing code - adds a range of event types to be used for header or other pseudo events, above the range used by the kernel - checks the return value of event handlers, which they can use to skip over large events during event processing rather than actually reading them into event objects. - unifies the multiple do_read() functions and updates its users. Note that none of these changes affect the existing perf data file format or processing - this code only comes into play if perf output is sent to stdout (or is read from stdin). Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: k-keiichi@bx.jp.nec.com Cc: acme@ghostprotocols.net LKML-Reference: <1270184365-8281-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/header.h')
-rw-r--r--tools/perf/util/header.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index c059f08cf877..6562ece67064 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -39,6 +39,11 @@ struct perf_file_header {
DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
+struct perf_pipe_file_header {
+ u64 magic;
+ u64 size;
+};
+
struct perf_header;
int perf_file_header__read(struct perf_file_header *self,
@@ -60,8 +65,9 @@ struct perf_header {
int perf_header__init(struct perf_header *self);
void perf_header__exit(struct perf_header *self);
-int perf_header__read(struct perf_header *self, int fd);
+int perf_header__read(struct perf_session *session, int fd);
int perf_header__write(struct perf_header *self, int fd, bool at_exit);
+int perf_header__write_pipe(int fd);
int perf_header__add_attr(struct perf_header *self,
struct perf_header_attr *attr);