| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_TRACE_CLOCK_H |
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| 3 | #define _LINUX_TRACE_CLOCK_H |
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| 4 | |
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| 5 | /* |
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| 6 | * 3 trace clock variants, with differing scalability/precision |
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| 7 | * tradeoffs: |
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| 8 | * |
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| 9 | * - local: CPU-local trace clock |
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| 10 | * - medium: scalable global clock with some jitter |
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| 11 | * - global: globally monotonic, serialized clock |
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| 12 | */ |
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| 13 | #include <linux/compiler.h> |
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| 14 | #include <linux/types.h> |
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| 15 | |
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| 16 | #include <asm/trace_clock.h> |
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| 17 | |
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| 18 | extern u64 notrace trace_clock_local(void); |
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| 19 | extern u64 notrace trace_clock(void); |
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| 20 | extern u64 notrace trace_clock_jiffies(void); |
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| 21 | extern u64 notrace trace_clock_global(void); |
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| 22 | extern u64 notrace trace_clock_counter(void); |
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| 23 | |
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| 24 | #endif /* _LINUX_TRACE_CLOCK_H */ |
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| 25 | |
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