diff options
author | Li Zefan <lizf@cn.fujitsu.com> | 2009-05-21 01:59:18 -0400 |
---|---|---|
committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-05-25 18:15:21 -0400 |
commit | b0aae68cc5508f3c2fbf728988c954db4c8b8a53 (patch) | |
tree | af1253c54cf3edc83806acab14a60d1529e81709 /include | |
parent | 4f5359685af6de7dca101393dc606620adbe963f (diff) |
tracing/events: change the type of __str_loc_item to unsigned short
When defining a dynamic size string, we add __str_loc_##item to the
trace entry, and it stores the location of the actual string in
entry->_str_data[]
'unsigned short' should be sufficient to store this information, thus
we save 2 bytes per dyn-size string in the ring buffer.
[ Impact: reduce memory occupied by dyn-size strings in ring buffer ]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A14EDB6.2050507@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/trace/ftrace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index edb02bc9f8ff..b5ff2e8229ec 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h | |||
@@ -25,7 +25,7 @@ | |||
25 | #define __field(type, item) type item; | 25 | #define __field(type, item) type item; |
26 | 26 | ||
27 | #undef __string | 27 | #undef __string |
28 | #define __string(item, src) int __str_loc_##item; | 28 | #define __string(item, src) unsigned short __str_loc_##item; |
29 | 29 | ||
30 | #undef TP_STRUCT__entry | 30 | #undef TP_STRUCT__entry |
31 | #define TP_STRUCT__entry(args...) args | 31 | #define TP_STRUCT__entry(args...) args |