search for: vsyscall_gtod

...mask to the basetime array lookup and set up the CLOCK_TAI base time in update_vsyscall(). The performance impact of the mask operation is within the noise. Signed-off-by: Thomas Gleixner <tglx at linutronix.de> --- arch/x86/entry/vdso/vclock_gettime.c | 2 +- arch/x86/entry/vsyscall/vsyscall_gtod.c | 4 ++++ arch/x86/include/asm/vgtod.h | 6 +++++- 3 files changed, 10 insertions(+), 2 deletions(-) --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -140,7 +140,7 @@ notrace static inline u64 vgetcyc(int mo notrace static int do_hres(c...

...ILD_BUG_ON somewhere to assert that this actually works? > > The performance impact of the mask operation is within the noise. > > Signed-off-by: Thomas Gleixner <tglx at linutronix.de> > --- > arch/x86/entry/vdso/vclock_gettime.c | 2 +- > arch/x86/entry/vsyscall/vsyscall_gtod.c | 4 ++++ > arch/x86/include/asm/vgtod.h | 6 +++++- > 3 files changed, 10 insertions(+), 2 deletions(-) > > --- a/arch/x86/entry/vdso/vclock_gettime.c > +++ b/arch/x86/entry/vdso/vclock_gettime.c > @@ -140,7 +140,7 @@ notrace static inline u64 vgetcyc(int mo &gt...

...ILD_BUG_ON somewhere to assert that this actually works? > > The performance impact of the mask operation is within the noise. > > Signed-off-by: Thomas Gleixner <tglx at linutronix.de> > --- > arch/x86/entry/vdso/vclock_gettime.c | 2 +- > arch/x86/entry/vsyscall/vsyscall_gtod.c | 4 ++++ > arch/x86/include/asm/vgtod.h | 6 +++++- > 3 files changed, 10 insertions(+), 2 deletions(-) > > --- a/arch/x86/entry/vdso/vclock_gettime.c > +++ b/arch/x86/entry/vdso/vclock_gettime.c > @@ -140,7 +140,7 @@ notrace static inline u64 vgetcyc(int mo &gt...

...Fix the VCLOCK_MAX sanity check - Remove the magic clock masking and extend the storage array Thanks, tglx 8<------------------- arch/x86/Kconfig | 1 arch/x86/entry/vdso/vclock_gettime.c | 199 ++++++++------------------------ arch/x86/entry/vsyscall/vsyscall_gtod.c | 55 ++++---- arch/x86/include/asm/vgtod.h | 42 +++--- arch/x86/kernel/time.c | 22 +++ include/linux/clocksource.h | 5 kernel/time/Kconfig | 4 kernel/time/clocksource.c | 2 8 files changed, 140 inser...

...ith todays code. The resulting performance depends heavily on the micro architecture and the compiler. Thanks, tglx 8<------------------- arch/x86/Kconfig | 1 arch/x86/entry/vdso/vclock_gettime.c | 199 ++++++++------------------------ arch/x86/entry/vsyscall/vsyscall_gtod.c | 55 ++++---- arch/x86/include/asm/vgtod.h | 46 ++++--- arch/x86/kernel/time.c | 22 +++ include/linux/clocksource.h | 5 kernel/time/Kconfig | 4 kernel/time/clocksource.c | 2 8 files changed, 144 inse...

...ith todays code. The resulting performance depends heavily on the micro architecture and the compiler. Thanks, tglx 8<------------------- arch/x86/Kconfig | 1 arch/x86/entry/vdso/vclock_gettime.c | 199 ++++++++------------------------ arch/x86/entry/vsyscall/vsyscall_gtod.c | 55 ++++---- arch/x86/include/asm/vgtod.h | 46 ++++--- arch/x86/kernel/time.c | 22 +++ include/linux/clocksource.h | 5 kernel/time/Kconfig | 4 kernel/time/clocksource.c | 2 8 files changed, 144 inse...