Date: Wed, 26 Nov 1997 07:00:57 -0200 (EDT) From: Davi Antunes Lima <davi@tba.com.br> To: Manfred Brands <m.brands@fugro-intersite.nl> Cc: AIC7xxx@FreeBSD.ORG Subject: Re: Gigabyte DX586 and Quantum Fireball TM3200 Message-ID: <Pine.LNX.3.95.971126064950.780A-100000@localhost> In-Reply-To: <347BDB9D.7C65A8D0@fugro-intersite.nl>
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On Wed, 26 Nov 1997, Manfred Brands wrote:
> Davi Antunes Lima wrote:
> >
> > salsa: /home/davi# hdparm -tT /dev/sda1
> >
> > /dev/sda1:
> > Timing buffer-cache reads: 32 MB in 1.25 seconds =25.60 MB/sec
> > Timing buffered disk reads: 16 MB in 5.74 seconds = 2.79 MB/sec
> >
>
> My Gigabyte motherboard with dual pentium 166MHz MMX and an onboard
> 7880
> does much better than this.
>
> The figures below are rough estimates as I don't have the computer here
> at work.
>
> The original 2.0.30 kernel, did about 8MB/s, I had to specify
> aic7xxx=ultra, to get 20.0MB/s
> bus speed. Tagged queueing was disabled.
>
> The latest 2.0.32 kernel, with tagged queuing enabled, does 'only'
> 6.7MB/s, still considerably
> more than the figures you quoted.
salsa: /home/davi# hdparm -tT /dev/sda1
/dev/sda1:
Timing buffer-cache reads: 32 MB in 1.00 seconds =32.00 MB/sec
Timing buffered disk reads: 16 MB in 5.92 seconds = 2.70 MB/sec
My adapter is only capable to synchronize the scsi bus at 10.0 MHz, I
suppose.
Those figures are with tagged-queue enabled. They still aren't good. My
system is:
- Pentium 166 MHz with 64 Mb RAM;
- Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: QUANTUM Model: FIREBALL_TM2110S Rev: 300N
Type: Direct-Access ANSI SCSI revision: 02
- Adapter and driver:
Adaptec AIC7xxx driver version: 4.1/3.2
Compile Options:
AIC7XXX_RESET_DELAY : 5
AIC7XXX_CMDS_PER_LUN : 8
AIC7XXX_TAGGED_QUEUEING: Enabled
AIC7XXX_PAGE_ENABLE : Enabled
AIC7XXX_PROC_STATS : Disabled
Adapter Configuration:
SCSI Adapter: Adaptec AHA-294X SCSI host adapter
(AIC-787x chipset)
Host Bus: Single
Base IO: 0xec00
Base IO Memory: 0xfebff000
IRQ: 9
SCBs: Used 8, HW 16, Page 255
Interrupts: 13578
Serial EEPROM: True
Extended Translation: Enabled
SCSI Bus Reset: Enabled
Ultra SCSI: Disabled
Disconnect Enable Flags: 0xff
- kernel 2.0.32
Hope this explains the difference.
Davi
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