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| author |   Lai Jiangshan <laijs@cn.fujitsu.com> | 2009-04-24 11:27:05 +0800 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2009-04-24 00:08:38 -0400 |
| commit | 334d4169a6592d3fcd863bbe822a8f6985ffa9af (patch) | |
| tree | 3ac9c038304eaa69b06d9cac735fd62a8d6c47b3 /kernel/trace/trace_output.c | |
| parent | tracing: fix cut and paste macro error (diff) | |
| download | linux-dev-334d4169a6592d3fcd863bbe822a8f6985ffa9af.tar.xz linux-dev-334d4169a6592d3fcd863bbe822a8f6985ffa9af.zip | |
ring_buffer: compressed event header
RB_MAX_SMALL_DATA = 28bytes is too small for most tracers, it wastes
an 'u32' to save the actually length for events which data size > 28.
This fix uses compressed event header and enlarges RB_MAX_SMALL_DATA.
[ Impact: saves about 0%-12.5%(depends on tracer) memory in ring_buffer ]
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <49F13189.3090000@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.c')
0 files changed, 0 insertions, 0 deletions