1 #ifndef _LINUX_TRACE_CLOCK_H
2 #define _LINUX_TRACE_CLOCK_H
5 * 3 trace clock variants, with differing scalability/precision
8 * - local: CPU-local trace clock
9 * - medium: scalable global clock with some jitter
10 * - global: globally monotonic, serialized clock
12 #include <linux/compiler.h>
13 #include <linux/types.h>
15 #include <asm/trace_clock.h>
17 extern u64 notrace trace_clock_local(void);
18 extern u64 notrace trace_clock(void);
19 extern u64 notrace trace_clock_global(void);
20 extern u64 notrace trace_clock_counter(void);
22 #endif /* _LINUX_TRACE_CLOCK_H */