tools/perf/util/tsc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_TSC_H
   3 #define __PERF_TSC_H
   4
   5 #include <linux/types.h>
   6
   7 #include "event.h"
   8
   9 struct 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
  20 struct perf_event_mmap_page;
  21
  22 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
  23                              struct perf_tsc_conversion *tc);
  24
  25 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
  26 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
  27 u64 rdtsc(void);
  28 u64 arch_get_tsc_freq(void);
  29
  30 size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp);
  31
  32 #endif // __PERF_TSC_H