From owner-freebsd-scsi Fri May 15 10:47:55 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA05747 for freebsd-scsi-outgoing; Fri, 15 May 1998 10:47:55 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from hub.org (hub.org [209.47.148.200]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA05742 for ; Fri, 15 May 1998 10:47:51 -0700 (PDT) (envelope-from scrappy@hub.org) Received: from localhost (scrappy@localhost) by hub.org (8.8.8/8.7.5) with SMTP id NAA01208 for ; Fri, 15 May 1998 13:47:49 -0400 (EDT) Date: Fri, 15 May 1998 13:47:49 -0400 (EDT) From: The Hermit Hacker To: scsi@FreeBSD.ORG Subject: Atrocious transfer rates... Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hi... Well, just plugged in the newest CAM snapshot, got everything compiled and installed, and am getting terrible transfer rates, as far as I can tell...granted, I just might be missing something in my kernel config, but I swear my pre-CAM kernel had better performance, with pretty much no change in settings. By slower, I mean that the VIKING II below, that I ran IOZONE on several times with the older driver, was reporting closer to 11Meg/s... ==================================================================== hub> dmesg | grep da2 da2 at ahc1 bus 0 target 1 lun 0 da2: Fixed Direct Access SCSI2 device da2: Serial Number PCB=JF60324939 U; HDA=MP62542171 da2: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing Enabled da2: 4101MB (8399520 512 byte sectors: 255H 63S/T 522C) (da2:ahc1:0:1:0): tagged openings now 37 (da2:ahc1:0:1:0): tagged openings now 36 Writing the 69 Megabyte file, 'iozone.tmp'...34.046875 seconds Reading the file...39.593750 seconds IOZONE performance measurements: 2125062 bytes/second for writing the file 1827352 bytes/second for reading the file hub# df . Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/da2s1a 992751 461077 452254 50% /usr/local/httpd ====================================================================== da1 at ahc1 bus 0 target 0 lun 0 da1: Fixed Direct Access SCSI2 device da1: Serial Number PCB=JF60539596 U; HDA=MP61750113 da1: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing Enabled da1: 4101MB (8399520 512 byte sectors: 255H 63S/T 522C) (da1:ahc1:0:0:0): tagged openings now 36 (da1:ahc1:0:0:0): tagged openings now 33 Writing the 62 Megabyte file, 'iozone.tmp'...34.695312 seconds Reading the file...27.132812 seconds IOZONE performance measurements: 1873789 bytes/second for writing the file 2396055 bytes/second for reading the filehub # df . Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/da1s1a 992751 572953 340378 63% /news ====================================================================== hub# dmesg | grep da0 da0 at ahc0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI2 device da0: Serial Number 194805310043 da0: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 4350MB (8910423 512 byte sectors: 255H 63S/T 554C) (da0:ahc0:0:0:0): tagged openings now 63 Writing the 82 Megabyte file, 'iozone.tmp'...13.632812 seconds Reading the file...15.726562 seconds IOZONE performance measurements: 6307079 bytes/second for writing the file 5467388 bytes/second for reading the filehub # df . Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/da0s1d 1477506 927430 431876 68% /var ======================================================================= hub# dmesg | grep ahc ahc0: rev 0x00 int a irq 10 on pci0.11.0 ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs ahc1: rev 0x01 int a irq 11 on pci0.12.0 ahc1: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message