On Thu, Jan 17, 2019 at 4:12 PM Kevin Bowling <kevin.bowl...@kev009.com> wrote: > > Out of curiosity are you using this driver? Any performance data?
Yep. I don't have any hard numbers on hand but my recollection is it caps out at about 5 GB/s, total, on Broadwell. Our workload with it is predominantly unmapped 8kB copies but includes some 512 byte copies as well. My recollection is that the channels are logical and share a single DMA engine, so there's not much reason to use more than one of them. It may improve on future microarchs but I can't speak to those. Cheers, Conrad _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
