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 struct perf_tsc_conversion {
   8         u16 time_shift;
   9         u32 time_mult;
  10         u64 time_zero;
  11         u64 time_cycles;
  12         u64 time_mask;
  13
  14         bool cap_user_time_zero;
  15         bool cap_user_time_short;
  16 };
  17
  18 struct perf_event_mmap_page;
  19
  20 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
  21                              struct perf_tsc_conversion *tc);
  22
  23 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
  24 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
  25 u64 rdtsc(void);
  26
  27 #endif // __PERF_TSC_H