Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
От | David Geier |
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Тема | Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc? |
Дата | |
Msg-id | 50c9f291-fc60-1d2e-e286-0fb888586e7e@gmail.com обсуждение исходный текст |
Ответ на | Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc? (Andres Freund <andres@anarazel.de>) |
Ответы |
Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
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Список | pgsql-hackers |
Hi Andres, > I also couldn't help and hacked a bit on the rdtsc pieces. I did figure out > how to do the cycles->nanosecond conversion with integer shift and multiply in > the common case, which does show a noticable speedup. But that's for another > day. I also have code for that here. I decided against integrating it because we don't convert frequently enough to make it matter. Or am I missing something? > I fought a bit with myself about whether to send those patches in this thread, > because it'll take over the CF entry. But decided that it's ok, given that > David's patches should be rebased over these anyway? That's alright. Though, I would hope we attempt to bring your patch set as well as the RDTSC patch set in. -- David Geier (ServiceNow)
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