On Mon, 5 Jan 2015, Stuart Henderson wrote: > On 2015-01-03, John Merriam <j...@johnmerriam.net> wrote: > > > > Is it worth messing around with to try to get HPET working on the > > OptiPlex 320 in OpenBSD or would it be written off as buggy hardware? I > > guess that assumes it could work at all... > > Probably write off as buggy. Some automated way to detect that it's buggy > might be nice though... > > > Here's another question that I have after reading up on this stuff. Is > > it worth using the HPET or ACPI timers in OpenBSD for non desktop > > machines? Obviously it depends on one's particular situation but from > > my reading it sounds like the most common reason to want better timers > > is multimedia which is usually not something to worry about on most servers. > > Some programs call gettimeofday() a *lot*, and there's quite a difference in > performance between the various clock sources. > > On my laptop, timing a loop of 5,000,000 gettimeofday() calls: > > acpihpet: 0m3.29s > acpitimer: 0m10.49s > i8254: 0m21.44s > > (I wonder how an ITSC-based timecounter would look...) >
I guess I'll stick with the HPET or ACPI timers which is what I was leaning towards anyway (I figured they must be the default for a reason). I wasn't able to draw any conclusions about which timer might be "best" based on what I read. Thanks! -- John Merriam
