Date: Mon, 20 Apr 1998 13:09:36 +0300 From: Antti-Pekka Liedes <apl@mail.cs.hut.fi> To: David Kelly <dkelly@hiwaay.net> Cc: questions@FreeBSD.ORG Subject: Re: two AHA-2940 controllers: horrible performance Message-ID: <19980420130936.58517@hutcs.cs.hut.fi> In-Reply-To: <199804200233.VAA08174@nospam.hiwaay.net>; from David Kelly on Sun, Apr 19, 1998 at 09:33:09PM -0500 References: <apl@mail.cs.hut.fi> <199804200233.VAA08174@nospam.hiwaay.net>
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On Sun, Apr 19, 1998 at 09:33:09PM -0500, David Kelly wrote: > Antti-Pekka Liedes writes: > > > > I just tried two Adaptec AHA-2940 SCSI controllers on a ppro 180 box running > > 2.2.6-stable from today. The first controller that has always been used in > > the machine worked as before, no problems, but the second controller had > > huge performance problems. > [...] > > ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 15 on pci0:17:0 > > ... > > ahc1 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 15 on pci0:20:0 > [...] > > any ideas? > > You noticed your MB has both on the same IRQ? Thats legal with PCI, but > who knows with PC hardware? See what happens if you move one (with the > MB BIOS) down to the 9, 10, or 11 range. > This gave me an idea, I switched the places of the second 2940 and my network card (etherpower 10/100). As the result, the second 2940 began to work, but the network card went inoperable. I tried a couple more configurations, and always either the etherpower or the second 2940 didn't work. Right now the only overlapping IRQ is with the first 2940 and the display adapter (matrox millennium): ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 15 on pci0:17:0 ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs ahc0 waiting for scsi devices to settle (ahc0:1:0): "IBM DCAS-34330W S65A" type 0 fixed SCSI 2 sd0(ahc0:1:0): Direct-Access 4134MB (8467200 512 byte sectors) (ahc0:2:0): "IBM DCAS-34330W S65A" type 0 fixed SCSI 2 sd1(ahc0:2:0): Direct-Access 4134MB (8467200 512 byte sectors) ahc1 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 11 on pci0:18:0 ahc1: aic7870 Single Channel, SCSI Id=7, 16 SCBs ahc1 waiting for scsi devices to settle ahc1:A:4: refuses synchronous negotiation. Using asynchronous transfers (ahc1:4:0): "PHILIPS CDD2600 1.07" type 5 removable SCSI 2 cd0(ahc1:4:0): CD-ROM can't get the size (ahc1:5:0): "SONY SDT-7000 0150" type 1 removable SCSI 2 st0(ahc1:5:0): Sequential-Access density code 0x13, 512-byte blocks, write-enabled de0 <Digital 21140A Fast Ethernet> rev 32 int a irq 9 on pci0:19:0 de0: SMC 9332BDT 21140A [10-100Mb/s] pass 2.0 de0: address 00:00:c0:31:50:f9 vga0 <VGA-compatible display device> rev 1 int a irq 15 on pci0:20:0 The device that doesn't work with this configuration is the second Adaptec. > -- > David Kelly N4HHE, dkelly@nospam.hiwaay.net > ===================================================================== > The human mind ordinarily operates at only ten percent of its > capacity -- the rest is overhead for the operating system. > -- Antti-Pekka Liedes * apl@IRC * There's no sign of the JMT 6 B 406 * apl@iki.fi * morning coming, you've been 02150 ESPOO * +358 - 9 - 468 3121 * left on your own, like FINLAND * +358 - 40 - 5873 593 * a rainbow in the dark To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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