C linux equivalent of windows QueryPerformanceCounter

Question

Is there an equivalent C function in linux for reading the CPU counter and its frequency?

I am looking for something similair to QueryPerformanceCounter function that reads the 64bit counter in modern CPU's

What is GetWPC? There's no such function in the Win32 API. – Alex Budovski Apr 17 '10 at 08:15 — Alex Budovski, Apr 17 '10 at 08:15

score 15 · Answer 1 · answered Apr 18 '10 at 00:25

15

clock_gettime(2), with an argument of CLOCK_REALTIME_HR.

answered Apr 18 '10 at 00:25

score 4 · Answer 2 · answered Jul 03 '16 at 17:50

4

clock_gettime() with CLOCK_MONOTONIC_RAW

answered Jul 03 '16 at 17:50

ivan.ukr

score 1 · Answer 3 · answered Apr 17 '10 at 07:11

1

The HAVEGE library uses the CPU counter. Check out its source code here. The relevant file is src/hardtick.h.

answered Apr 17 '10 at 07:11

Marcelo Cantos

3 Answers3