Re: [pgsql-hackers-win32] explain analyze timings
| От | Simon Riggs |
|---|---|
| Тема | Re: [pgsql-hackers-win32] explain analyze timings |
| Дата | |
| Msg-id | 1111332708.11750.362.camel@localhost.localdomain обсуждение исходный текст |
| Ответ на | Re: [pgsql-hackers-win32] explain analyze timings ("Magnus Hagander" <mha@sollentuna.net>) |
| Список | pgsql-patches |
On Sun, 2005-03-20 at 14:42 +0100, Magnus Hagander wrote: > >> There is. I beleive QueryPerformanceCounter has sub-mirosecond > >> resolution. > > > >> Can we just replace gettimeofday() with a version that's basically: > > > >No, because it's also used for actual time-of-day calls. It'd be > >necessary to hack executor/instrument.c in particular. > > Here's a patch that does just this. > > On my system, the counter resolution is 3192090000 ticks per second > (Intel Xeon CPU). On a AMD Athlon XP system, it's 3579545 ticks per > second (a lot less, but still way way way better than gettimeofday has > on win32). Is this just a Win32 hack? I've been looking for a sub-millisecond counter on other OS for a while now...anybody know of any port specific counters elsewhere? Thanks, Best Regards, Simon Riggs
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