From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Chen, Kenneth W" Subject: mpt fusion driver performance issue in 2.6.14-rc2 Date: Thu, 29 Sep 2005 11:59:19 -0700 Message-ID: <200509291859.j8TIxKg13339@unix-os.sc.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from fmr22.intel.com ([143.183.121.14]:26270 "EHLO scsfmr002.sc.intel.com") by vger.kernel.org with ESMTP id S964775AbVI2S7a (ORCPT ); Thu, 29 Sep 2005 14:59:30 -0400 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: "'Moore, Eric Dean'" Something happened in between kernel 2.6.12 and 2.6.14-rc2, where disk performance went 20X slower on the latest release kernel. I suspect it has something to do with the fusion driver. This showed up in the boot log: "mptscsih: ioc0: DV: Release failed." is it significant? 2.6.12 [root]# hdparm -t /dev/sdc Timing buffered disk reads: 174 MB in 3.03 seconds = 57.44 MB/sec 2.6.14-rc2 [root]# hdparm -t /dev/sdc Timing buffered disk reads: 8 MB in 3.16 seconds = 2.53 MB/sec Partial boot log with 2.6.14-rc2: Fusion MPT base driver 3.03.02 Copyright (c) 1999-2005 LSI Logic Corporation Fusion MPT SPI Host driver 3.03.02 GSI 28 (level, low) -> CPU 0 (0xc618) vector 49 ACPI: PCI Interrupt 0000:06:02.0[A] -> GSI 28 (level, low) -> IRQ 49 mptbase: Initiating ioc0 bringup ioc0: 53C1030: Capabilities={Initiator} scsi0 : ioc0: LSI53C1030, FwRev=01030a00h, Ports=1, MaxQ=255, IRQ=49 Vendor: MAXTOR Model: ATLAS10K3_18_SCA Rev: B000 Type: Direct-Access ANSI SCSI revision: 03 SCSI device sda: 35916548 512-byte hdwr sectors (18389 MB) SCSI device sda: drive cache: write back SCSI device sda: 35916548 512-byte hdwr sectors (18389 MB) SCSI device sda: drive cache: write back sda: sda1 sda2 sda3 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 Vendor: QUANTUM Model: ATLAS IV 9 SCA Rev: 0B0B Type: Direct-Access ANSI SCSI revision: 03 SCSI device sdb: 17942584 512-byte hdwr sectors (9187 MB) SCSI device sdb: drive cache: write back SCSI device sdb: 17942584 512-byte hdwr sectors (9187 MB) SCSI device sdb: drive cache: write back sdb: sdb1 Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0 Vendor: SEAGATE Model: ST336752LC Rev: 0004 Type: Direct-Access ANSI SCSI revision: 03 SCSI device sdc: 71687369 512-byte hdwr sectors (36704 MB) SCSI device sdc: drive cache: write back SCSI device sdc: 71687369 512-byte hdwr sectors (36704 MB) SCSI device sdc: drive cache: write back sdc: sdc1 sdc2 Attached scsi disk sdc at scsi0, channel 0, id 2, lun 0 Vendor: ESG-SHV Model: SCA HSBP M17 Rev: 1.0D Type: Processor ANSI SCSI revision: 02 GSI 29 (level, low) -> CPU 3 (0xc018) vector 50 ACPI: PCI Interrupt 0000:06:02.1[B] -> GSI 29 (level, low) -> IRQ 50 mptbase: Initiating ioc1 bringup mptscsih: ioc0: DV: Release failed. id 0<6>ioc1: 53C1030: Capabilities={Initiator} scsi1 : ioc1: LSI53C1030, FwRev=01030a00h, Ports=1, MaxQ=255, IRQ=50