Subject:Glitches with CD Extract on dual cpu system
Posted by: toecap
Date:10/5/2001 8:04:15 AM
Seem to have a problem with the above - 2 days ago, I aquired win2k and upgraded my machine from 98SE (it's been dual processor for a fortnight but up till now Linux was the only OS on my machine that knew about it!) Since upgrading, CD extract no longer works - if the cpu affinity is for both chips, tiny segments are dulicated, if it's for one only..tiny segments go missing!! Also, it seems unreasonable for the CD extract to eat 80% of _both_ cpus time (kernel on one, forge on the other)... This smells like a cache-coherency problem to me (sorry if that's too techie for this forum) - has anyone else experienced this?? setup : dual PIII 866mhz, [one stepping 3, one 6] 512mb ecc/clk1 pc133 Ram 10gb harddisk (I ran outta money :) Sony CDU4811 cd-reader cheers |
Subject:RE: Glitches with CD Extract on dual cpu system
Reply by: Rahl
Date:10/7/2001 10:03:05 AM
If you beleive it's a cache problem, then I would sugest that you get the program Cache Booster at www.analogx.com . I suppose that it's something that you could try. |
Subject:RE: Glitches with CD Extract on dual cpu system
Reply by: toecap
Date:10/15/2001 7:20:43 AM
Cheers for the analogx link - they've got some handy utils, but it's the CPU caches that I'm worried about - the prob is that if one cpu is working on a task using data in it's onboard cache, and the other cpu has the same data structure in it's cache too, the 2 copies can become 'incoherent' (updated out of sync) leading to unpredictable results.. Anyway, lowering the level of optimization for the CD ripping process in SF prefs seems to fix the prob - eats even more CPU time tho :( Interestingly, I've got a yamaha 40/20/10 cd writer as master on the same IDE chain as the sony, it works perfectly.. don't like using it 4 reading tho as it's expensive + I tend to get thru cd readers like nobody's busines :) c ya |