Date: Wed, 23 Feb 2000 23:06:06 -0600 From: John Lengeling <johnl@raccoon.com> To: Alejandro Ramirez <ales@megared.net.mx> Cc: Soren Schmidt <sos@freebsd.dk>, FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: ABIT BP6, UDMA-66 and wdc AC310200 Message-ID: <38B4BC3E.94B3437B@raccoon.com> References: <200002221730.SAA78748@freebsd.dk> <041001bf7e4e$e087ac80$020a0a0a@megared.net.mx>
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It looks like you have the tape drive on ahc1 along with the disk drives. Could the tape drive be negotiating your scsi bus down to a slower speed? Have you tried moving the tape drive to ahc0? johnl Alejandro Ramirez wrote: > > Hi Soren, > > Sorry for the intrusion, Im not using the ata driver, but maybe you can > give me some light, Im subscribed to current, and I was reading this mail, I > got impressed with the speed that you can get with your disks, so my > question its the following (see below): > > > > # dd if=/dev/ad4s2 of=/dev/null bs=40960k count=10 > > > 10+0 records in > > > 10+0 records out > > > 419430400 bytes transferred in 30.797045 secs (13619177 bytes/sec) > > > > Thats probably close to what your drive can pull of the platters... > > I get 22-23MB/sec off an IBM DPTA drive here with < 1% cpu usage, > > so the driver is not the problem.. > > I have a config with 7 disks online, giving me a raw throughput > > of ~100MB/s sustained, that is about the limit of what can be done > > over the PCI bus... > > If I make this test in a server with scsi-3 disks attached, 10Krpm 9GB > HotSwap IBM Disks, in a Netfinity 5000 Dual PIII-600 768MB Ram, with the > server totally idle, fresh install (3.4) I can hardly get 6MB/sec > trasferred, how can I achieve more speed with this configuration, Im asking > this to you because you can get a lot better performance with your disks > than I do, and there its maybe some tweaking that Im not aware of. > > # dd if=/dev/da0s1 of=/dev/null bs=40960k count=10 > 10+0 records in > 10+0 records out > 419430400 bytes transferred in 71.546849 secs (5862318 bytes/sec) > > systat -iostat shows 2950 tps for this disk top during this test. > > The disks have softupdates enabled, here its a dmesg of the system: > > Copyright (c) 1992-1999 FreeBSD Inc. > Copyright (c) 1982, 1986, 1989, 1991, 1993 > The Regents of the University of California. All rights reserved. > FreeBSD 3.4-RELEASE #7: Tue Feb 22 13:33:21 GMT 2000 > root@cache.megared.net.mx:/usr/src/sys/compile/kernel > Timecounter "i8254" frequency 1193182 Hz > CPU: Pentium III (686-class CPU) > Origin = "GenuineIntel" Id = 0x673 Stepping = 3 > > Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA, > CMOV,PAT,PSE36,MMX,FXSR,<b25>> > real memory = 805306368 (786432K bytes) > avail memory = 780263424 (761976K bytes) > Programming 24 pins in IOAPIC #0 > FreeBSD/SMP: Multiprocessor motherboard > cpu0 (BSP): apic id: 1, version: 0x00040011, at 0xfee00000 > cpu1 (AP): apic id: 0, version: 0x00040011, at 0xfee00000 > io0 (APIC): apic id: 14, version: 0x00170011, at 0xfec00000 > Preloaded elf kernel "kernel" at 0xc0263000. > Pentium Pro MTRR support enabled > Probing for devices on PCI bus 0: > chip0: <Host to PCI bridge (vendor=1166 device=0007)> rev 0x04 on pci0.0.0 > chip1: <Ross (?) host to PCI bridge> rev 0x02 on pci0.0.1 > ahc0: <Adaptec aic7895 Ultra SCSI adapter> rev 0x04 int a irq 11 on pci0.6.0 > ahc0: aic7895 Wide Channel A, SCSI Id=7, 16/255 SCBs > ahc1: <Adaptec aic7895 Ultra SCSI adapter> rev 0x04 int b irq 15 on pci0.6.1 > ahc1: aic7895 Wide Channel B, SCSI Id=7, 16/255 SCBs > lnc1: <PCNet/PCI Ethernet adapter> rev 0x36 int a irq 10 on pci0.9.0 > lnc1: PCnet-FAST+ address 00:06:29:50:fe:37 > vga0: <S3 Trio 64 graphics accelerator> rev 0x16 int a irq 9 on pci0.10.0 > chip2: <PCI to ISA bridge (vendor=1166 device=0200)> rev 0x4d on pci0.15.0 > ide_pci0: <PCI IDE controller (busmaster capable)> rev 0x4a int a irq 10 on > pci0.15.1 > Probing for devices on PCI bus 1: > Probing for devices on PCI bus 2: > Probing for devices on the ISA bus: > sc0 on isa > sc0: VGA color <16 virtual consoles, flags=0x0> > atkbdc0 at 0x60-0x6f on motherboard > atkbd0 irq 1 on isa > psm0 irq 12 on isa > psm0: model Generic PS/2 mouse, device ID 0 > sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa > sio0: type 16550A > sio1 at 0x2f8-0x2ff irq 3 on isa > sio1: type 16550A > fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa > fdc0: FIFO enabled, 8 bytes threshold > fd0: 1.44MB 3.5in > wdc0 at 0x1f0-0x1f7 irq 14 on isa > wdc0: unit 0 (atapi): <CRD-8322B/1.07>, removable, accel, dma, iordis > acd0: drive speed 5500KB/sec, 128KB cache > acd0: supported read types: CD-R, CD-RW, CD-DA, packet track > acd0: Audio: play, 255 volume levels > acd0: Mechanism: ejectable tray > acd0: Medium: no/blank disc inside, unlocked, lock protected > lnc0 not found at 0x280 > vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa > npx0 on motherboard > npx0: INT 16 interface > APIC_IO: Testing 8254 interrupt delivery > APIC_IO: routing 8254 via pin 2 > IP packet filtering initialized, divert disabled, rule-based forwarding > enabled, default to accept, logging disabled > Waiting 10 seconds for SCSI devices to settle > SMP: AP CPU #1 Launched! > sa0 at ahc1 bus 0 target 6 lun 0 > sa0: <ARCHIVE Python 04106-XXX 735E> Removable Sequential Access SCSI-2 > device > sa0: 5.000MB/s transfers (5.000MHz, offset 15) > pass6 at ahc1 bus 0 target 14 lun 0 > pass6: <SDR GEM200 2> Fixed Processor SCSI-2 device > pass6: 3.300MB/s transfers > da0 at ahc1 bus 0 target 0 lun 0 > da0: <IBM-PSG DMVS09D !# 0180> Fixed Direct Access SCSI-3 device > da0: 11.626MB/s transfers (5.813MHz, offset 8, 16bit), Tagged Queueing > Enabled > da0: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) > da4 at ahc1 bus 0 target 4 lun 0 > da4: <IBM-PSG DMVS09D !# 0180> Fixed Direct Access SCSI-3 device > da4: 11.626MB/s transfers (5.813MHz, offset 8, 16bit), Tagged Queueing > Enabled > da4: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) > da3 at ahc1 bus 0 target 3 lun 0 > da3: <IBM-PSG ST39103LC !# B222> Fixed Direct Access SCSI-2 device > da3: 11.626MB/s transfers (5.813MHz, offset 8, 16bit), Tagged Queueing > Enabled > da3: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) > da2 at ahc1 bus 0 target 2 lun 0 > da2: <IBM-PSG ST39103LC !# B222> Fixed Direct Access SCSI-2 device > da2: 11.626MB/s transfers (5.813MHz, offset 8, 16bit), Tagged Queueing > Enabled > da2: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) > da1 at ahc1 bus 0 target 1 lun 0 > da1: <IBM-PSG ST39103LC !# B222> Fixed Direct Access SCSI-2 device > da1: 11.626MB/s transfers (5.813MHz, offset 8, 16bit), Tagged Queueing > Enabled > da1: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) > changing root device to da0s1a > > If you think Im doing something wrong, or maybe the disks are not what I > think they are, or the ahc driver its limiting the speed, or the aic7895 > embedded card its limiting the speed, or something else, I would apreciate > any observation you can give me. > > P.S. Im not copying to current, because its not running current at the > moment, Im copying to questions. > > Thanks in Advance > > Syncerely > Ales > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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