1#ifndef _LINUX_TRACE_CLOCK_H 2#define _LINUX_TRACE_CLOCK_H 3 4/* 5 * 3 trace clock variants, with differing scalability/precision 6 * tradeoffs: 7 * 8 * - local: CPU-local trace clock 9 * - medium: scalable global clock with some jitter 10 * - global: globally monotonic, serialized clock 11 */ 12#include <linux/compiler.h> 13#include <linux/types.h> 14 15#include <asm/trace_clock.h> 16 17extern u64 notrace trace_clock_local(void); 18extern u64 notrace trace_clock(void); 19extern u64 notrace trace_clock_jiffies(void); 20extern u64 notrace trace_clock_global(void); 21extern u64 notrace trace_clock_counter(void); 22 23#endif /* _LINUX_TRACE_CLOCK_H */ 24