-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Kris Kennaway wrote: > Krassimir Slavchev wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> Kris Kennaway wrote: >>> Krassimir Slavchev wrote: >>>> -----BEGIN PGP SIGNED MESSAGE----- >>>> Hash: SHA1 >>>> >>>> Hello, >>>> >>>> Kris Kennaway wrote: >>>>> Krassimir Slavchev wrote: >>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>> Hash: SHA1 >>>>>> >>>>>> Hello, >>>>>> >>>>>> Here are lock profiling results with select patch applied. >>>>> OK, you are doing I/O over TCP. Are you sure you are using TCP on >>>>> both >>>>> systems? Linux may not be defaulting to TCP transport for local >>>>> queries. >>>>> >>>>> Add --pgsql-host="" to your sysbench command line to make it >>>>> communicate >>>>> over a local domain socket, which is much more efficient. >>>>> >>>>> Kris >>>>> >>>> Hmm, Yes linux uses local domain sockets! >>>> Here are results using local domain sockets on FreeBSD too: >>>> #threads #tranzactions/sec >>>> 1 728 >>>> 5 2996 >>>> 10 5301 >>>> 20 3931 >>>> 40 2466 >>>> 60 1852 >>>> 80 1424 >>>> 100 1216 >>>> >>>> Just to remember: >>>> Linux (2.6.18) >>>> #threads #transactions/sec >>>> 1 693 >>>> 5 3539 >>>> 10 5789 >>>> 20 5791 >>>> 40 5661 >>>> 60 5517 >>>> 80 5401 >>>> 100 5319 >>>> >>>> I have results using Fedora 8 on the same hardware: >>>> Linux (2.6.23) >>>> #threads #transactions/sec >>>> 1 740 >>>> 5 2675 >>>> 10 6486 >>>> 20 6893 >>>> 40 6623 >>>> 60 6623 >>>> 80 6522 >>>> 100 6417 >>>> >>>> If we look at the results with up to 10 threads the performance of >>>> FreeBSD is very good. >>>> May be something can be tuned for number of threads > number of CPUs? >>>> >>>> Are you interested in lock profiling statistics with more threads than >>>> the number of CPUs? >>> Yes, it's still performing anomalously. Glad we're making progress >>> though :) >>> >>> Kris >>> >> >> Okay, but how many threads will be more useful to test with? > > Let's start with 8 and say 40. The two problems seem to be slightly > lower peak and poor scaling above peak. They might be the same, or they > might be different. > > kris > >
I sent to you the results with 8 and 40 threads. The lower peak may be caused by differences in installations like different partitions I use ... The most important is keeping performance above this peak. Best Regards -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHh06CxJBWvpalMpkRAjosAJ0djbiU/foRiI+/ne1YyuqnVjKOaACfRCpV fI3vb0m1I+fIZ1M7cHCBjR8= =jiPg -----END PGP SIGNATURE----- _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
