[ovs-dev] [PATCH v1] INSTALL.DPDK: Update vhost multiqueue instructions.

[Bodireddy, Bhanuprakash]

>-----Original Message-----
>From: Stokes, Ian
>Sent: Wednesday, June 29, 2016 2:32 PM
>To: dev at openvswitch.org
>Cc: Bodireddy, Bhanuprakash <bhanuprakash.bodireddy at intel.com>
>Subject: RE: [PATCH v1] INSTALL.DPDK: Update vhost multiqueue instructions.
>
>Hi All,
>
>Just a gentle reminder as regards this patch.
>
>Bhanu has a new documentation patch for INSTALL.DPDK, maybe it should be
>added as part of that?

I have captured the vhost multiqueue instructions below in the ADVANCED install guide of version 8 patch below.
http://openvswitch.org/pipermail/dev/2016-July/074375.html

Regards,
Bhanu Prakash.

>
>Is there value in back porting this patch to OVS 2.5 though?
>
>Thanks
>Ian
>
>> -----Original Message-----
>> From: Stokes, Ian
>> Sent: Tuesday, June 14, 2016 4:02 PM
>> To: dev at openvswitch.org
>> Cc: Stokes, Ian
>> Subject: [PATCH v1] INSTALL.DPDK: Update vhost multiqueue instructions.
>>
>> Add details regarding PMD and rxq configuration to the vhost-user
>> multiqueue section to better enable packet enqueueing across multiple
>> vhost queues.
>>
>> Signed-off-by: Ian Stokes <ian.stokes at intel.com>
>> ---
>>  INSTALL.DPDK.md |   11 +++++++++++
>>  1 files changed, 11 insertions(+), 0 deletions(-)
>>
>> diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md index c2e32bf..afab7d7
>> 100644
>> --- a/INSTALL.DPDK.md
>> +++ b/INSTALL.DPDK.md
>> @@ -674,6 +674,17 @@ 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=$v
>>     ```
>>
>> +   A least 2 PMDs should be configured for the vswitch when using
>> multiqueue.
>> +   Using a single PMD will cause traffic to be enqueued to the same
>> vhost
>> +   queue rather than being distributed among different vhost queues
>> + for
>> a
>> +   vhost-user interface.
>> +
>> +   If traffic destined for a VM configured with multiqueue arrives to
>> the
>> +   vswitch via a physical DPDK port, then the number of rxqs should
>> also be
>> +   set to at least 2 for that physical DPDK port. This is required to
>> increase
>> +   the probability that a different PMD will handle the multiqueue
>> +   transmission to the guest using a different vhost queue.
>> +
>>     If one wishes to use multiple queues for an interface in the
>> guest, the
>>     driver in the guest operating system must be configured to do so.
>> It is
>>     recommended that the number of queues configured be equal to '$q'.
>> --
>> 1.7.4.1