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perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction

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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>
This commit is contained in:
Peter Zijlstra
2010-05-19 10:52:27 +02:00
committed by Ingo Molnar
parent 1c34bde13a
commit b7e2ecef92
5 changed files with 48 additions and 73 deletions
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17
include/trace/ftrace.h
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@@ -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); \
struct pt_regs __regs; \
\
perf_fetch_caller_regs(__regs, 1); \
\
perf_trace_templ_##template(event_call, __regs, args); \
\
put_cpu_var(perf_trace_regs); \
perf_fetch_caller_regs(&__regs, 1); \
perf_trace_templ_##template(event_call, &__regs, args); \
}
#undef DEFINE_EVENT_PRINT