aboutsummaryrefslogtreecommitdiffstats
path: root/include/trace
diff options
context:
space:
mode:
authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-05-19 14:02:22 +0200
committerIngo Molnar <mingo@elte.hu>2010-05-21 11:37:56 +0200
commit1c024eca51fdc965290acf342ae16a476c2189d0 (patch)
tree28dc160cc70a20eeb8b8825d6d52ea88a6188413 /include/trace
parentb7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d (diff)
downloadmrst-s0i3-test-1c024eca51fdc965290acf342ae16a476c2189d0.tar.gz
mrst-s0i3-test-1c024eca51fdc965290acf342ae16a476c2189d0.tar.xz
mrst-s0i3-test-1c024eca51fdc965290acf342ae16a476c2189d0.zip
perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events
Avoid the swevent hash-table by using per-tracepoint hlists. Also, avoid conditionals on the fast path by ordering with probe unregister so that we should never get on the callback path without the data being there. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.473188012@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/ftrace.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index f282885057d..4eb2148f132 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -768,6 +768,7 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
struct ftrace_raw_##call *entry; \
u64 __addr = 0, __count = 1; \
+ struct hlist_head *head; \
int __entry_size; \
int __data_size; \
int rctx; \
@@ -790,8 +791,9 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
\
{ assign; } \
\
+ head = per_cpu_ptr(event_call->perf_events, smp_processor_id());\
perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, __regs, event_call->perf_data); \
+ __count, __regs, head); \
}
#undef DEFINE_EVENT