diff options
Diffstat (limited to 'kernel/include/linux/trace_clock.h')
| -rw-r--r-- | kernel/include/linux/trace_clock.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/include/linux/trace_clock.h b/kernel/include/linux/trace_clock.h new file mode 100644 index 000000000..1d7ca2739 --- /dev/null +++ b/kernel/include/linux/trace_clock.h @@ -0,0 +1,23 @@ +#ifndef _LINUX_TRACE_CLOCK_H +#define _LINUX_TRACE_CLOCK_H + +/* + * 3 trace clock variants, with differing scalability/precision + * tradeoffs: + * + * - local: CPU-local trace clock + * - medium: scalable global clock with some jitter + * - global: globally monotonic, serialized clock + */ +#include <linux/compiler.h> +#include <linux/types.h> + +#include <asm/trace_clock.h> + +extern u64 notrace trace_clock_local(void); +extern u64 notrace trace_clock(void); +extern u64 notrace trace_clock_jiffies(void); +extern u64 notrace trace_clock_global(void); +extern u64 notrace trace_clock_counter(void); + +#endif /* _LINUX_TRACE_CLOCK_H */ |