diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2009-11-18 20:36:26 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-11-24 18:23:53 -0500 |
| commit | e5bc9721684e9412f3e0465222f317c362a8ab47 (patch) | |
| tree | 380e76f64fd58e1f68715514e4b37734f3098fb3 /include/linux | |
| parent | ff038f5c37c2070829004a0678372766c2b32180 (diff) | |
| download | kernel_samsung_espresso10-e5bc9721684e9412f3e0465222f317c362a8ab47.zip kernel_samsung_espresso10-e5bc9721684e9412f3e0465222f317c362a8ab47.tar.gz kernel_samsung_espresso10-e5bc9721684e9412f3e0465222f317c362a8ab47.tar.bz2 | |
tracing: Create new DEFINE_EVENT_PRINT
After creating the TRACE_EVENT_TEMPLATE I started to look at other
trace points to see what duplication was made. I noticed that there
are several trace points where they are almost identical except for
the name and the output format. Since TRACE_EVENT_TEMPLATE was successful
in bringing down the size of trace events, I added a DEFINE_EVENT_PRINT.
DEFINE_EVENT_PRINT is used just like DEFINE_EVENT is. That is, the
DEFINE_EVENT_PRINT also uses a TRACE_EVENT_TEMPLATE, but it allows the
developer to overwrite the print format. If there are two or more
TRACE_EVENTS that are identical except for the name and print, then
they can be converted to use a TRACE_EVENT_TEMPLATE. Since the
TRACE_EVENT_TEMPLATE already does the print output, the first trace event
would have its print format held in the TRACE_EVENT_TEMPLATE and
be defined with a DEFINE_EVENT. The rest will use the DEFINE_EVENT_PRINT
and override the print format.
Converting the sched trace points to both DEFINE_EVENT and
DEFINE_EVENT_PRINT. Five were converted to DEFINE_EVENT and two were
converted to DEFINE_EVENT_PRINT.
I was able to get the following:
$ size kernel/sched.o-*
text data bss dec hex filename
79299 6776 2520 88595 15a13 kernel/sched.o-notrace
101941 11896 2584 116421 1c6c5 kernel/sched.o-templ
104779 11896 2584 119259 1d1db kernel/sched.o-trace
sched.o-notrace is the scheduler compiled with no trace points.
sched.o-templ is with the use of DEFINE_EVENT and DEFINE_EVENT_PRINT
sched.o-trace is the current trace events.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/tracepoint.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 88a5b5a..7063383 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -283,6 +283,8 @@ static inline void tracepoint_synchronize_unregister(void) #define TRACE_EVENT_TEMPLATE(name, proto, args, tstruct, assign, print) #define DEFINE_EVENT(template, name, proto, args) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) #define TRACE_EVENT(name, proto, args, struct, assign, print) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) |