| Ingo Molnar | 14131f2 | 2009-02-26 18:47:11 +0100 | [diff] [blame] | 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 | extern u64 notrace trace_clock_local(void); |
| 16 | extern u64 notrace trace_clock(void); |
| 17 | extern u64 notrace trace_clock_global(void); |
| 18 | |
| 19 | #endif /* _LINUX_TRACE_CLOCK_H */ |