kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net)

Bruce Cran bruce at
Sun Dec 12 11:19:12 UTC 2010

On Sun, 12 Dec 2010 11:10:11 GMT
Alexander Best <arundel at> wrote:

>  i can confirm that a similar issue exists for me running a very
> recent HEAD snapshot on amd64. when the disk is performing heavy i/o
> (make -j8 buildworld e.g.) sound starts stuttering and the system
> goes semi-responsive. mostly the mouse input (usb) is lagging, but
> sometimes the cursor freezes in it's current position for 10 seconds
> or so. 

There was a discussion recently where we noticed this problem appeared
to occur mostly on systems with Intel Core 2 Duo CPUs. I've seen a
login paused for over 5 seconds (between typing the password and
the motd being displayed) due to an "svn up" on my laptop for example.

Bruce Cran

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