On 26/11/10 14:21, John Pilkington wrote: > On 26/11/10 08:46, Harald Hoyer wrote: >> Am 25.11.2010 14:30, schrieb John Pilkington: >>> Hi: My system spends a lot of its time processing video data, often >>> with not much numerical processing involved - just remuxing or making an >>> iso image. atop often shows disk activity above 90%. I do most of this >>> using ionice -c3, (ie 'idle' scheduling) which is supposed to reduce >>> impact on other tasks. The man page says "The impact of idle io >>> processes on normal system activity should be zero" and certainly >>> under f12 that seemed at least approximately true; but under f13 >>> terminal response is often very sluggish when these tasks are running. >>> Using kde 4.5.3, scheduling elevator=deadline (as in f12). >>> >>> Am I expecting the right thing? Does anyone else see this? >>> >>> John P >>> >> >> maybe your processing is using CPU also? >> > Well, yes. But the CPU-intensive parts seem ok; it's the parts that are > essentially datastream shuffling that are having the most impact, and it > seems more noticeable than it did in f12. I've tried to arrange these > to read and write on different spindles. Maybe different tasks are > having to be retrieved from disk, and that accounts for the delay, but I > didn't think that was happening. Swap doesn't appear to be active. > > My initial reply didn't go to the list. Sorry! > > My impression is that the system has become more responsive now - perhaps after today's update to util-linux-ng-2.17.2-9.fc13.x86_64.rpm -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
