mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:16:49 +07:00
14131f2f98
Impact: implement new tracing timestamp APIs Add three trace clock variants, with differing scalability/precision tradeoffs: - local: CPU-local trace clock - medium: scalable global clock with some jitter - global: globally monotonic, serialized clock Make the ring-buffer use the local trace clock internally. Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
20 lines
506 B
C
20 lines
506 B
C
#ifndef _LINUX_TRACE_CLOCK_H
|
|
#define _LINUX_TRACE_CLOCK_H
|
|
|
|
/*
|
|
* 3 trace clock variants, with differing scalability/precision
|
|
* tradeoffs:
|
|
*
|
|
* - local: CPU-local trace clock
|
|
* - medium: scalable global clock with some jitter
|
|
* - global: globally monotonic, serialized clock
|
|
*/
|
|
#include <linux/compiler.h>
|
|
#include <linux/types.h>
|
|
|
|
extern u64 notrace trace_clock_local(void);
|
|
extern u64 notrace trace_clock(void);
|
|
extern u64 notrace trace_clock_global(void);
|
|
|
|
#endif /* _LINUX_TRACE_CLOCK_H */
|