mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 09:16:41 +07:00
91ec87d57f
We used to store the wall-to-monotonic offset and the realtime base. It's faster to precompute the monotonic base. This is about a 3% speedup on Sandy Bridge for CLOCK_MONOTONIC. It's much more impressive for CLOCK_MONOTONIC_COARSE. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: John Stultz <john.stultz@linaro.org>
31 lines
622 B
C
31 lines
622 B
C
#ifndef _ASM_X86_VGTOD_H
|
|
#define _ASM_X86_VGTOD_H
|
|
|
|
#include <asm/vsyscall.h>
|
|
#include <linux/clocksource.h>
|
|
|
|
struct vsyscall_gtod_data {
|
|
seqcount_t seq;
|
|
|
|
struct { /* extract of a clocksource struct */
|
|
int vclock_mode;
|
|
cycle_t cycle_last;
|
|
cycle_t mask;
|
|
u32 mult;
|
|
u32 shift;
|
|
} clock;
|
|
|
|
/* open coded 'struct timespec' */
|
|
time_t wall_time_sec;
|
|
u32 wall_time_nsec;
|
|
u32 monotonic_time_nsec;
|
|
time_t monotonic_time_sec;
|
|
|
|
struct timezone sys_tz;
|
|
struct timespec wall_time_coarse;
|
|
struct timespec monotonic_time_coarse;
|
|
};
|
|
extern struct vsyscall_gtod_data vsyscall_gtod_data;
|
|
|
|
#endif /* _ASM_X86_VGTOD_H */
|