How to use rdtsc to get time

[qdztxc]

It's described in the README.md that rdtsc is the fastest way to get time under linux.

Benchmark	Std. Dev.	Median
One integer (no clock)	0 ns	8 ns
One integer (TSC clock)	0 ns	9 ns
One integer (sys clock)	0 ns	34 ns
One integer (poison cache)	8 ns	740 ns
One string	0 ns	38 ns
Three floats	0 ns	30 ns

But in the soruce code I saw clockNow uses clock_gettime. Is there a way or special version that uses rdtsc to get time under linux?

Thanks.

[erenon]

Hi,

Here's an example how to do it: https://github.com/Morgan-Stanley/binlog/blob/master/example/TscClock.cpp