On Fri, Jul 06, 2018 at 06:41:53AM +0000, Eggert, Lars wrote: > Hi, > > On 2018-7-5, at 17:47, n...@freebsd.org wrote: > > Set hw.cxgbe.fl_pktshift=0 in loader.conf to stop the chip from doing > > this. See cxgbe(4) for details on the knob. It's a historic > > optimization that doesn't seem to matter on modern CPUs, so the driver > > default should probably be 0 instead of 2. > > thanks, I must have missed this in the man page. > > Looking at this in detail now, I wonder if there are other loader > settings that should be set for netmap use, such as > hw.cxgbe.buffer_packing=0 and/or hw.cxgbe.allow_mbufs_in_cluster=0?
The driver uses dedicated tx/rx queues for netmap and those queues use netmap provided buffers instead of driver allocated mbuf+cluster used by normal rx queues. buffer_packing and allow_mbufs_in_cluster are not applicable to netmap queues. Regards, Navdeep _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
