trace_clock.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_TRACE_CLOCK_H
 3#define _LINUX_TRACE_CLOCK_H
 4
 5/*
 6 * 3 trace clock variants, with differing scalability/precision
 7 * tradeoffs:
 8 *
 9 *  -   local: CPU-local trace clock
10 *  -  medium: scalable global clock with some jitter
11 *  -  global: globally monotonic, serialized clock
12 */
13#include <linux/compiler.h>
14#include <linux/types.h>
15
16#include <asm/trace_clock.h>
17
18extern u64 notrace trace_clock_local(void);
19extern u64 notrace trace_clock(void);
20extern u64 notrace trace_clock_jiffies(void);
21extern u64 notrace trace_clock_global(void);
22extern u64 notrace trace_clock_counter(void);
23
24#endif /* _LINUX_TRACE_CLOCK_H */