Iirc, we experienced issues with 82574L, where the interface will hang/die. This is resolved in both FreeBSD and Linux by forcing ASPM off and disabling MSIX.
Jeff ----Original Message----- From: owner-freebsd-...@freebsd.org [mailto:owner-freebsd-...@freebsd.org] On Behalf Of Jack Vogel Sent: Friday, January 30, 2015 8:30 PM To: hiren panchasara Cc: FreeBSD Net Subject: Re: Intel 82574L (em) Yup, I wrote that :) Sean, I will check around to see if anything may have changed in that regard. Jack On Fri, Jan 30, 2015 at 5:00 PM, hiren panchasara < hi...@strugglingcoder.info> wrote: > On Fri, Jan 30, 2015 at 01:11:50PM -0800, Sean Bruno wrote: > > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA512 > > > > > http://www.intel.com/content/dam/doc/datasheet/82574l-gbe-controller-datasheet.pdf > > > > According to 7.1.11, this device does indeed have 2 queues for stuff and > > or things. So, basic RSS would be possible in something like an Atom > box. > > > > I note that the em(4) driver intentionally disables this on > > initialization. I'm up for some science on my new shiny, soon to be > > router box. Any reason not to default to 1 queue and allow loader.conf > > to raise it to 2? > > Intel folks know better but it seems this is hartwell. > > em_setup_msix() in very start says: > > /* > ** Setup MSI/X for Hartwell: tests have shown > ** use of two queues to be unstable, and to > ** provide no great gain anyway, so we simply > ** seperate the interrupts and use a single queue. > */ > > Things may have changed now. I guess you can try enabling it and find out > :-) > > cheers, > Hiren > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
