Kurt Roeckx <[EMAIL PROTECTED]> writes: > On Sun, Sep 11, 2005 at 05:59:49PM -0400, Tom Lane wrote: >> I kinda suspect that the cmpb test is a no-op or loss on all >> Intelish processors:
> I think an important question is wether this is for x86_64 in > general, of opteron specific. It could be that it's not the same > on Intel's EM64Ts. Good point --- anyone have one to try? > Something else to consider is the OS you're using. I've been > told that Linux isn't that good in NUMA and FreeBSD might be > better. It's hard to see how the OS could affect behavior at the level of processor cache operations --- unless they did something truly spectacularly stupid, like mark main memory non-cacheable. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings