Date: Thu, 14 Oct 1999 23:26:24 -0700 From: "David Schwartz" <davids@webmaster.com> To: "Parag Patel" <parag@cgt.com>, <freebsd-stable@freebsd.org> Subject: RE: Odd dmesg output or SCSI tagged-queueing problem? Message-ID: <000201bf16d6$344e1c90$021d85d1@youwant.to> In-Reply-To: <689.939968210@pinhead.parag.codegen.com>
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From cam_xpt.c:
/*
* Slow when tagged queueing is enabled. Write performance
* steadily drops off with more and more concurrent
* transactions. Best sequential write performance with
* tagged queueing turned off and write caching turned on.
*
* PR: kern/10398
* Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
* Drive: DCAS-34330 w/ "S65A" firmware.
*
* The drive with the problem had the "S65A" firmware
* revision, and has also been reported (by Stephen J.
* Roznowski <sjr@home.net>) for a drive with the "S61A"
* firmware revision.
*
* Although no one has reported problems with the 2 gig
* version of the DCAS drive, the assumption is that it
* has the same problems as the 4 gig version. Therefore
* this quirk entries disables tagged queueing for all
* DCAS drives.
*/
> -----Original Message-----
> From: owner-freebsd-stable@FreeBSD.ORG
> [mailto:owner-freebsd-stable@FreeBSD.ORG]On Behalf Of Parag Patel
> Sent: Thursday, October 14, 1999 11:17 PM
> To: freebsd-stable@freebsd.org; freebsd-scsi@freebsd.org
> Subject: Odd dmesg output or SCSI tagged-queueing problem?
>
>
>
> Hello. I just noticed my system's two IBM SCSI disks aren't displaying
> a "tagged queueing enabled" message. I only noticed it when I added a
> 3rd disk to the system today. Here's the edited dmesg output (the
> complete output is appended below):
>
> ...
> ahc0: <Adaptec aic7880 Ultra SCSI adapter> rev 0x00 int a irq 19
> on pci0.6.0
> ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
> ...
> da2 at ahc0 bus 0 target 2 lun 0
> da2: <QUANTUM XP34550W LYK8> Fixed Direct Access SCSI-2 device
> da2: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged
> Queueing Enabled
> da2: 4341MB (8890760 512 byte sectors: 255H 63S/T 553C)
> ...
> da1 at ahc0 bus 0 target 1 lun 0
> da1: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device
> da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da1: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)
> ...
> da0 at ahc0 bus 0 target 0 lun 0
> da0: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device
> da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)
> ...
>
> Now I seem to remember that these IBM drives used to be displayed like
> the Quantum, that is with the string "Tagged Queueing Enabled". I
> searched all the /var/log/messages files to see if any earlier kernel
> did display this, but nothing up to 4.0-CURRENT as of May 1999 displayed
> this string, and I've switched to running STABLE since.
>
> A search of the mail archives didn't turn up anything directly related
> to this, although one other person with the *identical* 7880 and IBM
> drive *did* have "Tagged Queueing Enabled" in their dmesg output. So it
> seems that at least I'm not mis-remembering this. I think.
>
> Thoughts? Thanks!
>
>
> -- Parag Patel
>
>
> Copyright (c) 1992-1999 FreeBSD Inc.
> Copyright (c) 1982, 1986, 1989, 1991, 1993
> The Regents of the University of California. All rights reserved.
> FreeBSD 3.3-STABLE #3: Thu Oct 14 15:12:05 PDT 1999
> root@pinhead.parag.codegen.com:/usr/src/sys/compile/PINHEAD
> Timecounter "i8254" frequency 1193182 Hz
> CPU: Pentium II (686-class CPU)
> Origin = "GenuineIntel" Id = 0x634 Stepping = 4
>
> Features=0x80fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR
> ,PGE,MCA,CMOV,MMX>
> real memory = 268435456 (262144K bytes)
> avail memory = 258191360 (252140K 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: 2, version: 0x00170011, at 0xfec00000
> Preloaded elf kernel "kernel" at 0xc02ed000.
> Pentium Pro MTRR support enabled
> Probing for devices on PCI bus 0:
> chip0: <Intel 82443LX host to PCI bridge> rev 0x03 on pci0.0.0
> chip1: <Intel 82443LX PCI-PCI bridge> rev 0x03 on pci0.1.0
> chip2: <Intel 82371AB PCI to ISA bridge> rev 0x01 on pci0.4.0
> ide_pci0: <Intel PIIX4 Bus-master IDE controller> rev 0x01 on pci0.4.1
> chip3: <Intel 82371AB Power management controller> rev 0x01 on pci0.4.3
> ahc0: <Adaptec aic7880 Ultra SCSI adapter> rev 0x00 int a irq 19
> on pci0.6.0
> ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
> fxp0: <Intel EtherExpress Pro 10/100B Ethernet> rev 0x05 int a
> irq 17 on pci0.11.0
> fxp0: Ethernet address 00:a0:c9:da:98:26
> Probing for devices on PCI bus 1:
> vga0: <Matrox model 051f graphics accelerator> rev 0x00 int a irq
> 16 on pci1.0.0
> Probing for PnP devices:
> CSN 1 Vendor ID: CTL00e4 [0xe4008c0e] Serial 0x08de2f0a Comp ID:
> PNPb02f [0x2fb0d041]
> 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 MouseMan+, 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
> sio2 at 0x3e8-0x3ef irq 5 on isa
> sio2: type 16550A
> sio3 at 0x2e8-0x2ef irq 9 on isa
> sio3: type 16550A
> ppc0 at 0x378 irq 7 on isa
> ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
> ppc0: FIFO with 16/16/9 bytes threshold
> lpt0: <generic printer> on ppbus 0
> lpt0: Interrupt-driven port
> ppi0: <generic parallel i/o> on ppbus 0
> 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 flags 0xa0ffa0ff on isa
> wdc0: unit 0 (atapi): <TOSHIBA CD-ROM XM-6202B/1108>, removable,
> accel, ovlap, dma, iordis
> acd0: drive speed 5512KB/sec, 256KB cache
> acd0: supported read types: CD-R, CD-RW, CD-DA
> acd0: Audio: play, 255 volume levels
> acd0: Mechanism: ejectable tray
> acd0: Medium: no/blank disc inside, unlocked
> wdc1 at 0x170-0x177 irq 15 flags 0xa0ffa0ff on isa
> wdc1: unit 0 (wd2): <IBM-DJNA-371800>, DMA, 32-bit, multi-block-16
> wd2: 17206MB (35239680 sectors), 34960 cyls, 16 heads, 63 S/T, 512 B/S
> sb0 at 0x220 irq 10 drq 1 on isa
> snd0: <SoundBlaster 16 4.16>
> sbxvi0 at drq 5 on isa
> snd0: <SoundBlaster 16 4.16>
> sbmidi0 not found at 0x330
> opl0 at 0x388 on isa
> snd0: <Yamaha OPL3 FM>
> joy0 at 0x201 on isa
> joy0: joystick
> joy1 not probed due to I/O address conflict with joy0 at 0x201
> 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
> Waiting 3 seconds for SCSI devices to settle
> SMP: AP CPU #1 Launched!
> pass4 at ahc0 bus 0 target 6 lun 0
> pass4: <UMAX Astra 600S V1.6> Fixed Scanner SCSI-2 device
> pass4: 3.300MB/s transfers
> da2 at ahc0 bus 0 target 2 lun 0
> da2: <QUANTUM XP34550W LYK8> Fixed Direct Access SCSI-2 device
> da2: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged
> Queueing Enabled
> da2: 4341MB (8890760 512 byte sectors: 255H 63S/T 553C)
> changing root device to da0s2a
> cd0 at ahc0 bus 0 target 4 lun 0
> cd0: <SONY CD-R CDU926S 1.1e> Removable Worm SCSI-2 device
> cd0: 10.000MB/s transfers (10.000MHz, offset 15)
> cd0: Attempt to query device size failed: NOT READY, Medium not present
> da1 at ahc0 bus 0 target 1 lun 0
> da1: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device
> da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da1: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)
> da0 at ahc0 bus 0 target 0 lun 0
> da0: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device
> da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)
> pid 493 (kpilotDaemon), uid 1000: exited on signal 6
>
>
>
>
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