On 9/7/2022 3:11 PM, Parav Pandit wrote:
From: Si-Wei Liu <si-wei.liu@xxxxxxxxxx>
Sent: Wednesday, September 7, 2022 5:40 PM
On 9/7/2022 12:51 PM, Parav Pandit wrote:
And I'd like commit log to include results of perf testing
- with indirect feature on
Which device do you suggest using for this test?
You may use software vhost-net backend with and without fix to compare.
Since this driver fix effectively lowers down the buffer size for the
indirect=on case as well,
Do you have sample example for this?
ip link add link ens300f1 name macvtap1 address $mac type macvtap mode
bridge
ifindex1=`cat /sys/class/net/macvtap1/ifindex`
qemu-system-x86_64 \
...
-netdev type=tap,id=hnet1,vhost=on,fd=25,vhostfd=27 \
-device
virtio-net-pci,netdev=hnet1,id=vnet1,mac=$mac,host_mtu=9000,mrg_rxbuf=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off,indirect_desc=on
\
25<>/dev/tap${ifindex1} 27<>/dev/vhost-net
indirect_desc=on is not actually required as it's on by default if not
specified.
-Siwei
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