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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
parentMerge branch 'perf' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/lin... (diff)
downloadlinux-b7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d.tar.xz
linux-b7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d.zip
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')
-rw-r--r--include/linux/ftrace_event.h9
-rw-r--r--include/trace/ftrace.h17
2 files changed, 10 insertions, 16 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index a9775dd7f7fe..126071bc90ab 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -197,20 +197,17 @@ extern void perf_trace_disable(int event_id);
extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
char *filter_str);
extern void ftrace_profile_free_filter(struct perf_event *event);
-extern void *
-perf_trace_buf_prepare(int size, unsigned short type, int *rctxp,
- unsigned long *irq_flags);
+extern void *perf_trace_buf_prepare(int size, unsigned short type,
+ struct pt_regs *regs, int *rctxp);
static inline void
perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
- u64 count, unsigned long irq_flags, struct pt_regs *regs,
- void *event)
+ u64 count, struct pt_regs *regs, void *event)
{
struct trace_entry *entry = raw_data;
perf_tp_event(entry->type, addr, count, raw_data, size, regs, event);
perf_swevent_put_recursion_context(rctx);
- local_irq_restore(irq_flags);
}
#endif
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 1016b2162935..f282885057dd 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