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| author | Steven Rostedt <srostedt@redhat.com> | 2012-08-09 22:26:46 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-03-07 10:06:06 -0500 |
| commit | 35bb4399bd0ef16b8a57fccea0047d98b6b0e7fb (patch) | |
| tree | 16b340bd7b6d1e17e9d78d7d3ea88141cf2e3905 /include/trace/ftrace.h | |
| parent | 1d6bae966e90134bcfd7807b8f9488d55198de91 (diff) | |
| download | linux-35bb4399bd0ef16b8a57fccea0047d98b6b0e7fb.tar.bz2 | |
tracing: Move event storage for array from macro to standalone function
The code that shows array fields for events is defined for all events.
This can add up quite a bit when you have over 500 events.
By making helper functions in the core kernel to do the work
instead, we can shrink the size of the kernel down a bit.
With a kernel configured with 502 events, the change in size was:
text data bss dec hex filename
12990946 1913568 9785344 24689858 178bcc2 /tmp/vmlinux
12987390 1913504 9785344 24686238 178ae9e /tmp/vmlinux.patched
That's a total of 3556 bytes, which comes down to 7 bytes per event.
Although it's not much, this code is just called at initialization of
the events.
Link: http://lkml.kernel.org/r/20120810034708.084036335@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/ftrace.h')
| -rw-r--r-- | include/trace/ftrace.h | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 3873d6e4697f..54928faf2119 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -302,15 +302,11 @@ static struct trace_event_functions ftrace_event_type_funcs_##call = { \ #undef __array #define __array(type, item, len) \ do { \ - mutex_lock(&event_storage_mutex); \ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ - snprintf(event_storage, sizeof(event_storage), \ - "%s[%d]", #type, len); \ - ret = trace_define_field(event_call, event_storage, #item, \ - offsetof(typeof(field), item), \ - sizeof(field.item), \ - is_signed_type(type), FILTER_OTHER); \ - mutex_unlock(&event_storage_mutex); \ + ret = ftrace_event_define_field(event_call, #type, len, \ + #item, offsetof(typeof(field), item), \ + sizeof(field.item), \ + is_signed_type(type), FILTER_OTHER); \ if (ret) \ return ret; \ } while (0); |