Null syscall latency

Molnar Ingo (mingo@kaliban.csoma.elte.hu)
Sat, 27 Apr 1996 12:30:37 -0400 (EDT)

Was playing around with the fast 64 bit Pentium timer, and measured
syscall latencies on a 100 MHz Pentium.

Null syscall (gettimeofday with (NULL,NULL) arguments => zero
functionality) latency is:

2.363 +- 0.005 usecs

This is with hot caches and best case execution. It's measured with the
Pentium timer, so it IS this accurate.

-- mingo