> -----Original Message----- > From: Flavio Leitner [mailto:f...@sysclose.org] > Sent: Friday, February 12, 2016 4:58 AM > To: Stokes, Ian > Cc: dev@openvswitch.org; i.maxim...@samsung.com > Subject: Re: [ovs-dev] [PATCH v2] INSTALL.DPDK: Add notes regarding > vhost multiq configuration. > > On Tue, 9 Feb 2016 14:40:53 +0000 > Ian Stokes <ian.sto...@intel.com> wrote: > > > Linux kernel network devices in a guest should have the number of > > multi-purpose channels configured when used with DPDK multiqueue on > the host. > > This commit adds an example of how this can be done. Also add QEMU 2.5 > > requirements for multiqueue with DPDK in NEWS. > > > > Signed-off-by: Ian Stokes <ian.sto...@intel.com> > > --- > > INSTALL.DPDK.md | 17 +++++++++++++++++ > > NEWS | 2 +- > > 2 files changed, 18 insertions(+), 1 deletions(-) > > > > diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md index d892788..e9f9acc > > 100644 > > --- a/INSTALL.DPDK.md > > +++ b/INSTALL.DPDK.md > > @@ -586,6 +586,23 @@ Follow the steps below to attach vhost-user > port(s) to a VM. > > -device virtio-net- > pci,mac=00:00:00:00:00:02,netdev=mynet2,mq=on,vectors=$v > > ``` > > > > + Also, the driver in the guest operating system must be configured > to use > > + the exact same number of queues. If the number of queues is less > than $q, > > + then packets that are enqueued to queues unused by guest will not > be > > + received. > > > It would be good to provide these details in the documentation. However, > if the patch http://openvswitch.org/pipermail/dev/2016- > February/066066.html gets merged, the above paragraph needs to be > reworded a bit. > > Thanks.
Thanks Flavio, I've discussed this with Ilya and I'll remove the reference to packets becoming stuck in the v3 re-spin. > -- > fbl > > > + > > + This can be done for the Linux kernel virtio-net driver with: > > + > > + ``` > > + ethtool -L <DEV> combined <$q> > > + ``` > > + > > + A note on the command above: > > + > > + `-L`: Changes the numbers of channels of the specified network > > + device > > + > > + `combined`: Changes the number of multi-purpose channels. > > + > > DPDK vhost-cuse: > > ---------------- > > > > diff --git a/NEWS b/NEWS > > index 3e33871..2d1b8fb 100644 > > --- a/NEWS > > +++ b/NEWS > > @@ -55,7 +55,7 @@ v2.5.0 - xx xxx xxxx > > - DPDK: > > * Requires DPDK 2.2 > > * Added multiqueue support to vhost-user > > - > > + * Note: QEMU 2.5+ required for multiqueue support > > > > v2.4.0 - 20 Aug 2015 > > --------------------- > _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
