Okay. Anyway, the semaphores are apparently used for purposes other than TAS. That can be made faster too, on platforms which support POSIX mutexes (shared between processes).
"Robert E. Bruccoleri" wrote: > > Dear Igor, > > > I am confused to hell. I always thought MIPS does NOT have TAS > > instruction ;) > > On the SGI platform, there are very high speed implementations of test > and set which allow large number of processes to safely and quickly > access shared memory. SGI has a hardware team that specifies MIPS > processor variants that are used in their servers so the machines can > scale. > > I've tried to get SGI interested in putting some internal engineering > effort to improve PostgreSQL performance on operations which could > benefit from its shared memory parallel architecture (like index > creation and sorting), but without success. > > +-----------------------------+------------------------------------+ > | Robert E. Bruccoleri, Ph.D. | email: [EMAIL PROTECTED] | > | P.O. Box 314 | URL: http://www.congen.com/~bruc | > | Pennington, NJ 08534 | | > +-----------------------------+------------------------------------+ ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
