Messages in this thread | | | Date | Tue, 19 Oct 1999 11:45:47 +0200 (CEST) | From | Wojtek Pilorz <> | Subject | Re: ISSUE: (ext2fs?) disk I/O and responsivness |
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On Tue, 19 Oct 1999, David Ford wrote:
> Date: Tue, 19 Oct 1999 00:00:43 -0700 > From: David Ford <david@kalifornia.com> > Reply-To: david+validemail@kalifornia.com > To: Mattias Sandgren <mattias@leif.silicon.nu> > Cc: linux-kernel@vger.rutgers.edu, Ronald Wahl <rwahl@gmx.net> > Subject: Re: ISSUE: (ext2fs?) disk I/O and responsivness > > Let me chime in and say "me too". I have a system that responds precisely like > this. Actually, it's not "a large file", it is "a large amount of writes". > > You can see this by untarring linux kernel source with -v. it _creeps_ by. If > done immediately after boot, it's quite fast, then it slows to an intolerable crawl > and there is -no- indication as to _why_ it's slow. At first I thought it might be > because I compiled it SMP, nope, that isn't a fix. Next I swapped from adaptec > 2940 to a symbios card. Nope, that didn't have any affect either. > > Here's a kicker. IDE is still fast. I can zip through an IDE disk like no > tomorrow. Even when the scsi drive is slogging, the IDE drive is a wee bit faster > (but terribly slow due to the entire system being killed). Even gpm movements are > jerky and that's scary. X...forget about it. Takes 90 seconds to move 1/2 across > the screen, it's easier to close your eyes and calculate the correct mouse motion > to get where you want to go. > > And no. Absolutely no load shows on the machine, no kernel messages, no NOTHING > which gives the slightest clue what's wrong. > > -d [...] Well, I have recently changed machine at work from Compaq DeskPro 5100 to Compaq DeskPro EN 6450 and OS from RedHat Linux 4.2 to RedHat Linux 6.0; Both systems are IDE, but with PD-CD connected to BusLogic SCSI; While my previous system behaved normal when writing to PD, the new one was completely unusable during write (I was not even able to switch between screens on X); Then I went to BIOS settings and changed PCI Busmastering enable option from default NO to YES (and also disabled serial 2, so I had a separate IRQ for SCSI card); After this change the system work quite well during transfers to PD.
I am not sure how much relevant it is to your problems, but as symptoms were similar, I thought I would post this.
Best regards,
Wojtek
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