Messages in this thread | | | Date | Mon, 15 Nov 2004 15:51:22 -0500 | From | Bill Davidsen <> | Subject | Re: Problem: 2.4.26/27 & 2.6.9 Audio CD Burning |
| |
Steven E. Woolard wrote: > I've reproduced this problem on my system with 2.4.26, 2.4.27, and > 2.6.9. When trying to burn an audio CD with cdrecord, the system load > average will skyrocket (relitively speaking) up to 4 or 5 sometimes > reaching 10 or higher. This does not happen with data CD's or at all > with 2.6.7 kernel. I used scsi emulation (of course) on 2.4.26 and > 2.4.27--not 2.6.9. > > Side Notes: > DMA is enabled, I have tried downgrading cdrtools, and if > I remember correctly it has the same problem in 2.6.8(.1). > > Hardware: > AMD Athlon XP 2400+ > 1024MB RAM > VIA VT82C686 Southbridge (IDE Controller) > LITE-ON LTR48246S CDRW Drive
My understanding based on experience is that with a 2.4 kernel you will get a high load average burning audio, and the quickest fix is to use speed= to slow the burn.
With 2.6 you should get DMA using the ATAPI:/dev/hdX interface, and in fact I do see only a few percent CPU burning at 40x (max) and a lowly 2.0GHz Celeron.
If none of this helps, do run "vmstat 1" to a file while running, and post your command line used to start the burn. You might try "ATA:" as well for comparison. I don't know if "-dummy" will allow you to test without actually burning or not.
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - 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/
| |