Date: 05 Jul 2002 17:22:02 +0100 From: Simon Dick <simond@irrelevant.org> To: Juha Ylitalo <juha.ylitalo@iki.fi> Cc: questions@FreeBSD.ORG Subject: Re: DMA on ATAPI (or lack of it ....) Message-ID: <1025886123.10728.8.camel@linux> In-Reply-To: <1025885885.277.5.camel@shoes.st-paul> References: <1025883140.270.53.camel@shoes.st-paul> <1025883737.10728.4.camel@linux> <1025885885.277.5.camel@shoes.st-paul>
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On Fri, 2002-07-05 at 17:18, Juha Ylitalo wrote: > On Fri, 2002-07-05 at 18:42, Simon Dick wrote: > ... > > > My noname Athlon box seems to work nicely, except for those times, when > > > I try to watch DVD movies (with ogle 0.8.4). Problem in movies is that > > > framerate is 17-20 fps. > > > With quick check on system, problem turns out to be that DMA is turned > > > on ATA, but not on ATAPI. Is there something (in BIOS, rearrange IDE > > > devices, sysctl, kernel, ...) that I could do to change DMA on for atapi > > > and that way I would get better performance from DVD drive or should I > > > simply settle on what I get out of it at the moment (since movies really > > > are only area, where it bothers me) and worry about it, when I buy my > > > next machine, which will probably take at least 4-5 years (based on > > > interval on my previous hardware upgrades). > ... > > Try adding this to /etc/sysctl.conf > > hw.ata.atapi_dma=1 > > It seems that sysctl.conf is read at the end of rc and at that point, it > seems to be too late to set turn it on. Or at least this is what I get: > shoes# sysctl -w hw.ata.atapi_dma=1 > sysctl: oid 'hw.ata.atapi_dma' is read only > shoes# > In case it makes any difference, my kern.securelevel is -1. Good point, try putting it in /boot/loader.conf instead as hw.ata.atapi_dma="1" -- Simon Dick simond@irrelevant.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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