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
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