1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 214131f2fSIngo Molnar #ifndef _LINUX_TRACE_CLOCK_H 314131f2fSIngo Molnar #define _LINUX_TRACE_CLOCK_H 414131f2fSIngo Molnar 514131f2fSIngo Molnar /* 614131f2fSIngo Molnar * 3 trace clock variants, with differing scalability/precision 714131f2fSIngo Molnar * tradeoffs: 814131f2fSIngo Molnar * 914131f2fSIngo Molnar * - local: CPU-local trace clock 1014131f2fSIngo Molnar * - medium: scalable global clock with some jitter 1114131f2fSIngo Molnar * - global: globally monotonic, serialized clock 1214131f2fSIngo Molnar */ 1314131f2fSIngo Molnar #include <linux/compiler.h> 1414131f2fSIngo Molnar #include <linux/types.h> 1514131f2fSIngo Molnar 168cbd9cc6SDavid Sharp #include <asm/trace_clock.h> 178cbd9cc6SDavid Sharp 1814131f2fSIngo Molnar extern u64 notrace trace_clock_local(void); 1914131f2fSIngo Molnar extern u64 notrace trace_clock(void); 208aacf017SSteven Rostedt (Red Hat) extern u64 notrace trace_clock_jiffies(void); 2114131f2fSIngo Molnar extern u64 notrace trace_clock_global(void); 226249687fSSteven Rostedt extern u64 notrace trace_clock_counter(void); 2314131f2fSIngo Molnar 2414131f2fSIngo Molnar #endif /* _LINUX_TRACE_CLOCK_H */ 25