aleksandr.fedorov_itglobal.com added inline comments. INLINE COMMENTS
> v.maffione_gmail.com wrote in pci_virtio_net.c:496 > In theory this NIOCRXSYNC is not needed, because poll() or kqueue_wait() > calls NIOCRXSYNC internally. This works perfectly with poll(), at least. As > far as I know bhyve uses kqueue to wait on the netmap file descriptor. What > happens if you remove this ioctl()? I agree, it seems there are no need to call ioctl(..., NIOCRXSYNC, ...). And I observed a some throughput increase (~300-500 MBit/s 1500 MTU), when RX packet occupied one netmap buffer. This is explained by the fact that additional syscall was gone. But I need some time to investigate how this affects performance with a large MTU. CHANGES SINCE LAST ACTION https://reviews.freebsd.org/D20276/new/ REVISION DETAIL https://reviews.freebsd.org/D20276 EMAIL PREFERENCES https://reviews.freebsd.org/settings/panel/emailpreferences/ To: aleksandr.fedorov_itglobal.com, #bhyve, jhb, rgrimes, krion, v.maffione_gmail.com Cc: mizhka_gmail.com, novel, olevole_olevole.ru, freebsd-virtualization-list, evgueni.gavrilov_itglobal.com, bcran _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
