On Wednesday, July 25, 2012 7:28:15 am Luigi Rizzo wrote: > Author: luigi > Date: Wed Jul 25 11:28:15 2012 > New Revision: 238765 > URL: http://svn.freebsd.org/changeset/base/238765 > > Log: > Use legacy interrupts as a default. This gives up to 10% speedup > when used in qemu (and this driver is for non-PCIe cards, > so probably its largest use is in virtualized environments). > > Approved by: Jack Vogel > MFC after: 3 days
Why not make this a tunable or some such? You could even have it only use the legacy handler under qemu easily enough. There's no reason this has to be a compile-time option. This is almost certainly slower on real hardware where this is important to work around dubious Intel Host-PCI bridges that result in aliased USB interrupts for every em(4) interrupt. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
