lpt0 printer slows system response significantly

[Anton Shterenlikht]

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?

thanks
anton