Messages in this thread | | | Date | Thu, 17 May 2007 12:34:36 +0200 | From | DervishD <> | Subject | Re: usb-storage nice value |
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Hi Alan :)
* Alan Cox <alan@lxorguk.ukuu.org.uk> dixit: > > My system is a bit modest: a 7 years old motheboard with VIA686B, a > > 1900+ Athlon XP, but with plenty of RAM (1280MB + 1GB swap). I know, if > > I want more hard disk performance I should buy a new box with SATA or > > whatever, but the fact is that I hadn't problems with the same hardware > > and kernel 2.4.x. I need 2.6.x, so I cannot go back to 2.4.x. > > Disk is actually less likely to be a problem than PCI bus bandwidth - the > older VIA boards seem quite happy to fill the PCI bus solid during bursts > of disk I/O
I was supposing something in that line, since disk speed is quite high (when I only read or write but not both). I just didn't think about PCI bandwidth.
> > bad idea too, where should I look for culprits so I can tweak the system > > a bit and improve disk performance? I'm not 100% sure that the problem > > You might want to try the reverse if you have a UDMA100 or UDMA133 drive > then setting the speed down to UDMA66 definitely evens out the behaviour > of VIA boards when doing video capture. I don't know if it helps playback.
Won't that reduce disk performance when using just one disk? I don't pass much data between disks (or even copy data within one disk), so not being able to watch movies while copying data is, for me, more acceptable than having a slower disk all the time.
And yes, all my disks are UDMA100.
Is there a way of changing chipset behaviour from userspace so PCI bus is not filled during IO bursts?
Thanks a lot for your answer, Alan :)
Raúl Núñez de Arenas Coronado
-- Linux Registered User 88736 | http://www.dervishd.net It's my PC and I'll cry if I want to... RAmen! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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