do_gettimeofday( ) precision?
From: abhijit
Date: Wed Jun 23 2004 - 10:24:32 EST
hello,
the comment on top of do_gettimeofday( ) [arch/i386/kernel/time.c] says:
/*
* This version of gettimeofday has microsecond resolution
* and better than microsecond precision on fast x86 machines with TSC.
*/
void do_gettimeofday(struct timeval *tv)
{
...
but the code below limits usec to <= 1000000. so isn't the resolution
not limited to microsec even on TSC capable boxes?
if one wants higher resolution (for timestamping etc.) whats the preferred
way?
thanks
abhijit
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