From d2e1446d81725c351dc73a03b397ce043fb18452 Mon Sep 17 00:00:00 2001 From: Meizu OpenSource Date: Mon, 15 Aug 2016 10:19:42 +0800 Subject: first commit --- include/linux/trace_clock.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 include/linux/trace_clock.h (limited to 'include/linux/trace_clock.h') diff --git a/include/linux/trace_clock.h b/include/linux/trace_clock.h new file mode 100644 index 000000000..1d7ca2739 --- /dev/null +++ b/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 +#include + +#include + +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 */ -- cgit v1.2.3