On 04/12/12 1:06 PM, Scott Silva wrote: > As far as I know, hyper-threading is sort of like processor emulation... As > long as the extra threads are hitting different registers, it can help. But if > it needs any floating point, the thread will wait until it has full access... > It seems to be hit or miss on how much it will hurt/help a load...
database work is almost never floating point bound, even if the SQL is full of FP code, for every FP machine operation there's 1000s of integer operations, for which the HT does quite well at. HT is almost always a win-win on everything that can use lots of threads, other than scientific processing or multimedia encoding (video transcoding etc) -- john r pierce N 37, W 122 santa cruz ca mid-left coast _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
