| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 */ |