[EMAIL PROTECTED] writes: >> 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: > > * Get a DMA-capable parallel port (supposing such exist, and FreeBSD > supports them); > > * Move the printer to a network connection or dedicated print server; > > * Somehow tell the printer not to receive so quickly.
* Change the printer port to polled mode. ["lptcontrol -p"] With this kind of hardware, it may even speed up your printing as well. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
