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| author | Ingo Molnar <mingo@elte.hu> | 2009-11-23 10:19:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-23 10:19:20 +0100 |
| commit | 6e3d8330ae2c4b2c11a9577a0130d2ecda1c610d (patch) | |
| tree | 4d360eaa3e9cefc16081f3853b5fa02996b9caf4 | |
| parent | perf record, x86: Print more intelligent error message when sampling fails (diff) | |
| download | linux-6e3d8330ae2c4b2c11a9577a0130d2ecda1c610d.tar.xz linux-6e3d8330ae2c4b2c11a9577a0130d2ecda1c610d.zip | |
perf events: Do not generate function trace entries in perf code
Decreases perf overhead when function tracing is enabled,
by about 50%.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/cpu/Makefile | 1 | ||||
| -rw-r--r-- | kernel/Makefile | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 68537e957a9b..1d2cb383410e 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -5,6 +5,7 @@ # Don't trace early stages of a secondary CPU boot ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_common.o = -pg +CFLAGS_REMOVE_perf_event.o = -pg endif # Make sure load_percpu_segment has no stackprotector diff --git a/kernel/Makefile b/kernel/Makefile index 17b575ec7d07..6b7ce8173dfd 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -21,6 +21,7 @@ CFLAGS_REMOVE_mutex-debug.o = -pg CFLAGS_REMOVE_rtmutex-debug.o = -pg CFLAGS_REMOVE_cgroup-debug.o = -pg CFLAGS_REMOVE_sched_clock.o = -pg +CFLAGS_REMOVE_perf_event.o = -pg endif obj-$(CONFIG_FREEZER) += freezer.o |