From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 11 Oct 2000 23:46:19 +0100 (BST) From: Chris Evans Subject: Re: 2.4.0test9 vm: disappointing streaming i/o under load In-Reply-To: <39E4E543.8A4EB3BF@norran.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Roger Larsson Cc: linux-mm@kvack.org List-ID: On Thu, 12 Oct 2000, Roger Larsson wrote: > Hi, > > (you do have DMA enabled...) Oh yes (discovering that in fact my chipset is only UDMA33 in the process). > I have tested throughput - new kernels are rather good. I don't doubt it. I'll try and post some numbers on this later. > I have also tested latency stuff in test9 - I have not > seen any thing as bad as your results. > But my audio apps runs with high priority... > > To be able to determine the cause > Try to to renice your audio deamon (and audio clients) > renice -10 > > > Did it become better? Not noticeably :-( Perhaps I'm just asking too much, booting with mem=32M. No point testing the new VM with a 128Mb desktop, though; it wouldn't break a sweat! 2.2 (RH7.0 kernel) does skip less, though, and the duration of skip is less. Perhaps the two kernels have different elevator settings? Cheers Chris -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/