On 2018年02月28日 22:53, Tan, Jianfeng wrote:
Hi Jason,
On 2/28/2018 10:10 PM, Jason Wang wrote:
On 2018年02月24日 17:35, Jianfeng Tan wrote:
Mostly likely, we will make UFO as a kind of GSO engine.
For short term, we can just call APIs in librte_ip_frag to fragment.
To test:
1. start testpmd with two vhost port.
$ set fwd csum
$ start
2. start vm0 connected to vhost0;
$ ifconfig xxx 1.1.1.1/24 up
$ ethtool -K xxx ufo on
3. start vm1 connected to vhost1;
$ ifconfig xxx 1.1.1.2/24 up
$ ethtool -K xxx ufo on
$ (Fill a large file named 1.txt)
$ cat 1.txt | socat - udp-sendto:1.1.1.1:5000
Just a reminder, UFO was completely removed upstream.
Thank you for the information.
Saw the deprecation patch at Linux v4.16-rc3, wonder what "version+"
counts "merden kernels" in "modern kernels will no longer generate UFO
skbs"?
git describe d9d30adf56777c402c0027c0e6ae21f17cc0a365
v4.12-11055-gd9d30ad
So I think any Linux version beyond 4.12 won't generate any UFO packets.
And this is mostly for stock VMs with old kernels to help the
migration from kernel vswitch to user space vswitch.
Yes, testpmd may still see UFO packets for old kernels. Just a reminder
in case you miss it.
(Btw, we plan to support UDP tunnel offload for virtio-net.)
Will other OSes generate UFO packets, FreeBSD, Windows? Anyone can
provide such information?
I don't know about them.
Thanks.
Thanks,
Jianfeng
