lpt0 printer slows system response significantly
mexas at bristol.ac.uk
Wed Nov 1 09:55:53 UTC 2006
On Wed, Nov 01, 2006 at 12:02:24AM -0800, perryh at pluto.rain.com wrote:
> > PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
> > 18 root 1 -60 -179 0K 8K *Giant 15:09 77.05% irq7: lpt0
> > 11 root 1 171 52 0K 8K RUN 48.0H 11.13% idle
> The interrupt service for the parallel port is using over 3/4 of
> the CPU, and half of the rest is "idle".
> I take it this is a laser printer, which can consume bytes from the
> parallel port as fast as the processor can send them. Top-of-head
> dump of ways to cut down on the interrupt traffic:
yes, it is lj2100.
> * Somehow tell the printer not to receive so quickly.
how can I do this?
More information about the freebsd-questions