[Smaug] X running slow?
cerise at armory.com
Wed Nov 9 16:55:52 PST 2005
You can probably make a significant improvement in the rendering department.
What sort of video card do you have? Does it have DRI? Do you have 3D
acceleration turned on (glxinfo | grep '^direct' should give a "yes")?
On Wed, Nov 09, 2005 at 04:41:56PM -0800, Meg McRoberts wrote:
> Something else to check is whether your configuration runs
> better with DMA on or off. It seems to be off by default
> for most configurations -- I'm still trying to wrap my
> head around the variations...
> Anyhow, run hdparm -t /dev/hda to time the buffered disk
> reads. Then run hdparm -d 1 /dev/hda to turn on dma and
> run the hdparm -t test again -- compare the numbers and
> see which is faster.
> On my system, the performance went from 14MB in 3.73 seconds
> to 120MB in 3.73 seconds -- fairly significant.
> If your system is faster with dma on, edit the
> /etc/sysconfig/harddisks file and change the DMA parameter --
> I forget exactly what it is but if you search for DMA,
> you'll find it.
> There was a good article in one of the online journals a
> couple months ago that suggested this and some other
> tunings. I haven't had as dynamic results with the
> others but I'm still studying -- my performance for
> Firefox seems to degrade after a few days... I know,
> if I'd do the Windows thing and reboot a couple times
> day, I wouldn't have this problem ;-)
> Someone at work has been playing with TCP tunings also
> and finding that it buys him a lot -- the defaults have
> to be set to work for dial-up lines and really old
> modems. If anyone is interested, I can dig out the
> recommendations he has.
> --- Peter Belew <abcruzww at gmail.com> wrote:
> > Some tools to look at what's going on with memory would
> > be 'top' and 'vmstat' .... also look at /proc/meminfo .
> > Peter
> > On 11/9/05, james sheldon <jsheldon at ucsc.edu> wrote:
> > >
> > > I'm running the latest version of ubuntu, and X seems really slow on my
> > > computer, which runs XP fairly decently. Any thoughts as to how I might
> > > optimize X-windows?
> > >
> > > -James
> > >
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