On Tue, 2009-06-02 at 23:53 +0900, Atsushi Ogawa wrote: > I made a faster version of AllocSetFreeIndex for x86 architecture.
> Results of benchmark script: > Xeon(Core architecture), RedHat EL4, gcc 3.4.6 > bytes : 4 8 16 32 64 128 256 512 1024 mix > original: 0.780 0.780 0.820 0.870 0.930 0.970 1.030 1.080 1.130 0.950 > patched : 0.380 0.170 0.170 0.170 0.170 0.180 0.170 0.180 0.180 0.280 > The effect of the patch that I measured by oprofile is: > - test program: pgbench -c 1 -t 50000 (fsync=off) > > original: > CPU: P4 / Xeon with 2 hyper-threads, speed 2793.55 MHz (estimated) > Counted GLOBAL_POWER_EVENTS events > with a unit mask of 0x01 (mandatory) count 100000 > samples % symbol name > 66854 6.6725 AllocSetAlloc > patched: > CPU: P4 / Xeon with 2 hyper-threads, speed 2793.55 MHz (estimated) > Counted GLOBAL_POWER_EVENTS events > with a unit mask of 0x01 (mandatory) count 100000 > samples % symbol name > 47610 4.9333 AllocSetAlloc > I think this patch improves AllocSetAlloc/AllocSetFree performance. Looks like very good work. Much appreciated. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
