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authorOleg Nesterov <oleg@redhat.com>2013-08-06 18:08:41 +0200
committerSteven Rostedt <rostedt@goodmis.org>2013-08-13 21:05:12 -0400
commit36009d07b79d2a168d6037947357d96e5d8cebe7 (patch)
tree70e960fc660e47cfaf7546cbd7cd401a4842846f /include/trace/ftrace.h
parentd4e4ab86bcba5a72779c43dc1459f71fea3d89c8 (diff)
downloadop-kernel-dev-36009d07b79d2a168d6037947357d96e5d8cebe7.zip
op-kernel-dev-36009d07b79d2a168d6037947357d96e5d8cebe7.tar.gz
tracing/perf: Expand TRACE_EVENT(sched_stat_runtime)
To simplify the review of the next patches: 1. We are going to reimplent __perf_task/counter and embedd them into TP_ARGS(). expand TRACE_EVENT(sched_stat_runtime) into DECLARE_EVENT_CLASS() + DEFINE_EVENT(), this way they can use different TP_ARGS's. 2. Change perf_trace_##call() macro to do perf_fetch_caller_regs() right before perf_trace_buf_prepare(). This way it evaluates TP_ARGS() asap, the next patch explores this fact. Note: after 87f44bbc perf_trace_buf_prepare() doesn't need "struct pt_regs *regs", perhaps it makes sense to remove this argument. And perhaps we can teach perf_trace_buf_submit() to accept regs == NULL and do fetch_caller_regs(CALLER_ADDR1) in this case. 3. Cosmetic, but the typecast from "void*" buys nothing. It just adds the noise, remove it. Link: http://lkml.kernel.org/r/20130806160841.GA2736@redhat.com Acked-by: Peter Zijlstra <peterz@infradead.org> Tested-by: David Ahern <dsahern@gmail.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/ftrace.h')
-rw-r--r--include/trace/ftrace.h7
1 files changed, 3 insertions, 4 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 41a6643..618af05 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -663,15 +663,14 @@ perf_trace_##call(void *__data, proto) \
int __data_size; \
int rctx; \
\
- perf_fetch_caller_regs(&__regs); \
- \
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
__entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
sizeof(u64)); \
__entry_size -= sizeof(u32); \
\
- entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
- __entry_size, event_call->event.type, &__regs, &rctx); \
+ perf_fetch_caller_regs(&__regs); \
+ entry = perf_trace_buf_prepare(__entry_size, \
+ event_call->event.type, &__regs, &rctx); \
if (!entry) \
return; \
\
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