On Tue, Nov 26, 2002 at 02:28:54AM -0600, David Bell wrote:
> I have been having this very annoying problem of very high system load
> when burning audio CDs. When burning a full audio CD at 24x, I have
> seen the load average reach 20 -- This, on a single processor AMD
> Thunderbird system. top shows 90%+ system proc usage, and, although the
> burn works, and the CDs are playable (probably due to burn-proof), this
> problem still nags at me. If I drop the burn speed down to 4x, the
> system is usable, but, the system proc time is hovering around 50%, and,
> naturally, the burn is unnecessarily slow. ...I have no problems
> whatsoever when burning data CDs [in Linux], or when burning audio CDs
> with Nero in Win2k. I have run cdrecord with extra verbosity and debug
> flags and haven't noticed any errors, nor has there been any mention of
> trouble from the system logs. After googling around a bit, I found this
> thread:
>
>
>http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&threadm=ao9tne%2425nr%241%40FreeBSD.csie.NCTU.edu.tw&rnum=3&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26safe%3Doff%26q%3Daudio%2Bsystem%2Bload%26btnG%3DGoogle%2BSearch%26meta%3Dgroup%253Dmailing.comp.cdwrite
>
> ...Which describes my problem perfectly. My system stats:
>
> AMD Thunderbird 1ghz, overclocked to 1377mhz and perfectly stable
> 512MB of Crucial CAS2 PC133 memory
> Epox 8kta3-Pro motherboard, VIA KT133A chipset with 686B IDE controller
> Lite-On 24x CD-RW drive
>
> Is this an issue in the kernel or cdrecord?
> Is it expected to be fixed soon?
> If not, if I put the burner on a Promise IDE controller card, would the
> problems subside?
Have you checked if dma is enabled? It could help a lot (both on the HD
and on the cd burner). Other times apparently dma on the cd burner is
bad and ust on the hd is good. You probably need a 2.4 kernel to get
dma support on that chipset. I have seen some comments about never
using anything other than HDs on a promise controller, although I
haven't seen any info about why that is the recomendation.
uname -a: gives your kernel version
cat /proc/ide/hd?/settings: gives current, min and max settings for each
ide device.
Len Sorensen
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