33 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __PERF_TSC_H3#define __PERF_TSC_H4 5#include <linux/types.h>6 7#include "event.h"8 9struct perf_tsc_conversion {10 u16 time_shift;11 u32 time_mult;12 u64 time_zero;13 u64 time_cycles;14 u64 time_mask;15 16 bool cap_user_time_zero;17 bool cap_user_time_short;18};19 20struct perf_event_mmap_page;21 22int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,23 struct perf_tsc_conversion *tc);24 25u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);26u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);27u64 rdtsc(void);28double arch_get_tsc_freq(void);29 30size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp);31 32#endif // __PERF_TSC_H33