On Tue, 15 Apr 2025 14:43:41 +0700 Bui Quang Minh wrote:
> +def setup_xsk(cfg, xdp_queue_id = 0) -> bkg:
> + # Probe for support
> + xdp = cmd(f'{cfg.net_lib_dir / "xdp_helper"} - -', fail=False)
> + if xdp.ret == 255:
> + raise KsftSkipEx('AF_XDP unsupported')
> + elif xdp.ret > 0:
> + raise KsftFailEx('unable to create AF_XDP socket')
> +
> + return bkg(f'{cfg.net_lib_dir / "xdp_helper"} {cfg.ifindex}
> {xdp_queue_id}',
> + ksft_wait=3)
> +
> +def check_xdp_bind(cfg):
> + ip(f"link set dev %s xdp obj %s sec xdp" %
> + (cfg.ifname, cfg.net_lib_dir / "xdp_dummy.bpf.o"))
> + ip(f"link set dev %s xdp off" % cfg.ifname)
> +
> +def check_rx_resize(cfg, queue_size = 128):
> + rx_ring = _get_rx_ring_entries(cfg)
> + ethtool(f"-G %s rx %d" % (cfg.ifname, queue_size))
> + ethtool(f"-G %s rx %d" % (cfg.ifname, rx_ring))
Unfortunately this doesn't work on a basic QEMU setup:
# ethtool -G eth0 rx 128
[ 15.680655][ T287] virtio_net virtio2 eth0: resize rx fail: rx queue index:
0 err: -2
netlink error: No such file or directory
Is there a way to enable more capable virtio_net with QEMU?
