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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-05-19 10:52:27 +0200
committerIngo Molnar <mingo@elte.hu>2010-05-21 11:37:56 +0200
commitb7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d (patch)
tree341c3a03743108bbdf82ee0eed9f4c4085f1b694 /include/trace
parent1c34bde13a3cdcd4c7c6322f8052e67c2c91caf1 (diff)
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perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction
Improves performance. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> 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: <1274259525.5605.10352.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/ftrace.h17
1 files changed, 7 insertions, 10 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 1016b216293..f282885057d 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -768,7 +768,6 @@ 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; \
- unsigned long irq_flags; \
int __entry_size; \
int __data_size; \
int rctx; \
@@ -781,17 +780,18 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
"profile buffer not large enough")) \
return; \
+ \
entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
- __entry_size, event_call->id, &rctx, &irq_flags); \
+ __entry_size, event_call->id, __regs, &rctx); \
if (!entry) \
return; \
+ \
tstruct \
\
{ assign; } \
\
perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, irq_flags, __regs, \
- event_call->perf_data); \
+ __count, __regs, event_call->perf_data); \
}
#undef DEFINE_EVENT
@@ -799,13 +799,10 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
static notrace void perf_trace_##call(proto) \
{ \
struct ftrace_event_call *event_call = &event_##call; \
- struct pt_regs *__regs = &get_cpu_var(perf_trace_regs); \
- \
- perf_fetch_caller_regs(__regs, 1); \
- \
- perf_trace_templ_##template(event_call, __regs, args); \
+ struct pt_regs __regs; \
\
- put_cpu_var(perf_trace_regs); \
+ perf_fetch_caller_regs(&__regs, 1); \
+ perf_trace_templ_##template(event_call, &__regs, args); \
}
#undef DEFINE_EVENT_PRINT