From 5f293474c4c6c4dc2baaf2dfd486748b5986de76 Mon Sep 17 00:00:00 2001 From: Andy Lutomirski Date: Thu, 22 Mar 2012 21:15:52 -0700 Subject: [PATCH] x86-64: Inline vdso clock_gettime helpers This is about a 3% speedup on Sandy Bridge. Signed-off-by: Andy Lutomirski Signed-off-by: John Stultz --- arch/x86/vdso/vclock_gettime.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c index 6eea70b8..885eff4 100644 --- a/arch/x86/vdso/vclock_gettime.c +++ b/arch/x86/vdso/vclock_gettime.c @@ -94,7 +94,8 @@ notrace static inline long vgetns(void) return (v * gtod->clock.mult) >> gtod->clock.shift; } -notrace static noinline int do_realtime(struct timespec *ts) +/* Code size doesn't matter (vdso is 4k anyway) and this is faster. */ +notrace static int __always_inline do_realtime(struct timespec *ts) { unsigned long seq, ns; int mode; @@ -111,7 +112,7 @@ notrace static noinline int do_realtime(struct timespec *ts) return mode; } -notrace static noinline int do_monotonic(struct timespec *ts) +notrace static int do_monotonic(struct timespec *ts) { unsigned long seq, ns; int mode; @@ -128,7 +129,7 @@ notrace static noinline int do_monotonic(struct timespec *ts) return mode; } -notrace static noinline int do_realtime_coarse(struct timespec *ts) +notrace static int do_realtime_coarse(struct timespec *ts) { unsigned long seq; do { @@ -139,7 +140,7 @@ notrace static noinline int do_realtime_coarse(struct timespec *ts) return 0; } -notrace static noinline int do_monotonic_coarse(struct timespec *ts) +notrace static int do_monotonic_coarse(struct timespec *ts) { unsigned long seq; do { -- 2.7.4