----- Цитат от Mikko Tiihonen (mikko.tiiho...@nitorcreations.com), на 14.12.2012 в 17:33 -----
> On 12/13/2012 12:19 AM, Peter Geoghegan wrote: >> On 12 December 2012 22:11, Mikko Tiihonen >> <mikko.tiiho...@nitorcreations.com> wrote: >>> noticed a "XXX: It might be worth considering using an atomic fetch-and-add >>> instruction here, on architectures where that is supported." in lock.c >>> >>> Here is my first try at using it. >> >> That's interesting, but I have to wonder if there is any evidence that >> this *is* actually helpful to performance. > > One of my open questions listed in the original email was request for help on > creating a test case that exercise the code path enough so that it any > improvements can be measured. > Running pgbench on 16+ cores/threads could stress locking primitives. From my experience even benchmarks run on 8 core systems should tell the difference. -- Luben Karavelov
