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 | |
18 | extern u64 notrace trace_clock_local(void); |
19 | extern u64 notrace trace_clock(void); |
20 | extern u64 notrace trace_clock_jiffies(void); |
21 | extern u64 notrace trace_clock_global(void); |
22 | extern u64 notrace trace_clock_counter(void); |
23 | |
24 | #endif /* _LINUX_TRACE_CLOCK_H */ |
25 | |