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authorIngo Molnar <mingo@elte.hu>2009-11-23 10:19:20 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-23 10:19:20 +0100
commit6e3d8330ae2c4b2c11a9577a0130d2ecda1c610d (patch)
tree4d360eaa3e9cefc16081f3853b5fa02996b9caf4 /arch/x86
parentbfd451184d80301d1ae970b1ebffde1e9c6240f9 (diff)
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/cpu/Makefile1
1 files changed, 1 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