Holger Kiehl <[EMAIL PROTECTED]> wrote: > > Hello > > On a four CPU Opteron compiling the Fusion-MPT as module gives much better > performance when compiling it in, here some bonnie++ results: > > Version 1.03 ------Sequential Output------ --Sequential Input- > --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec > %CP > compiled in 15872M 38366 71 65602 22 18348 4 53276 84 57947 7 905.4 > 2 > module 15872M 51246 96 204914 70 57236 14 59779 96 264171 33 923.0 > 2 > > This happens with 2.6.10, 2.6.11 and 2.6.11-bk2. Controller is a > Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI. > > Why is there such a large difference? >
Holger, this problem remains unresolved, does it not? Have you done any more experimentation? I must say that something funny seems to be happening here. I have two MPT-based Dell machines, neither of which is using a modular driver: akpm:/usr/src/25> 0 hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 64 MB in 5.00 seconds = 12.80 MB/sec That's a bit disappointing. Running 2.6.9-rc2-mm2(!) with a SCSI storage controller: LSI Logic / Symbios Logic 53c1030 (rev 07) controller on disks which shudl hit 50MB/sec. And bix:/home/akpm# hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 114 MB in 3.03 seconds = 37.57 MB/sec with 2.6.11-rc4-mm1 using Fusion MPT SCSI Host driver 3.01.16 scsi0 : ioc0: LSI53C1030, FwRev=01030600h, Ports=1, MaxQ=222, IRQ=25 scsi1 : ioc1: LSI53C1030, FwRev=01030600h, Ports=1, MaxQ=222, IRQ=26 Vendor: SEAGATE Model: ST3146807LW Rev: DS09 Type: Direct-Access ANSI SCSI revision: 03 Better, but again I'd expect >50MB/sec. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
