Mike Tancsa wrote: > At 05:53 AM 23/05/2006, Daniel O'Connor wrote: >>On Saturday 13 May 2006 22:00, Holger Kipp wrote: >> >> > If you encounter silo overflows, you might need to increase >> > cp4ticks in sio.c, eg >> > - cp4ticks = speed / 10 / hz * 4; >> > + cp4ticks = speed / 10 / hz * 40; >> > and/or you might want to change hz from 1000 back to 100. >> >>OK, I'll try it. > > This fixes the overflows for me as well. I have a number of boxes out > in the field running with this local modification (40 vs 4). Without > it, I have problems running a PCI modem at speeds better than 9600 > without causing overflows.
Yes, I had a laptop that exhibited this same problem and this change did fix it. I believe this is described in the following PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/51982 I had tried to work on this patch to provide a bounded sysctl for the multiplier, that way you could just set the hint on boot up in order to fix this problem. With a little trial and error you could find the lowest tick value that works for the interrupt load. One of these days I'll get back to figuring out all the places I need to add code to get that hint to work correctly. -- othermark atkin901 at nospam dot yahoo dot com (!wired)?(coffee++):(wired); _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
