Subject: Re: Jerky/frozen mouse under load
To: Jakub Misak <firstname.lastname@example.org>
From: Steven M. Bellovin <email@example.com>
Date: 02/12/2005 23:06:08
In message <firstname.lastname@example.org>, Jakub Misak writes:
>I was using NetBSD 1.6 before, which was good and smooth. But when I
>switched to 2.0, I noticed that the mouse cursor tends to get much more
>jerky or even frozen in X under heavy load, sometimes with extremely
>long pauses. For example, when I unpacked pkgsrc.tgz in /usr, it was not
>jerky - it was completely, 100% frozen for 10-15 seconds. Which means
>that there was a 15 second pause when I couldn't move the mouse at all,
>the whole system didn't respond at all.
>But even if the disc/CPU load is not so high, the mouse cursor very often
>gets jerky during normal, regular tasks - for example when a page is
>being loaded in a web browser, etc.
>Why is 2.0 so much worse in this respect than 1.6 was (Linux on the same
>PC is also much, much smoother)? Is there anything that can be done
>Intel Celeron 2.4 GHz
>512 MB RAM
>XFree86 with nv driver
My guess is that you need to play with the VM sysctls, but I don't know
what values to suggest.
--Prof. Steven M. Bellovin, http://www.cs.columbia.edu/~smb