[ovirt-users] [Ovirt 4.0.6] Suggestion required for Network Throughput options

[Yaniv Kaul]

On Fri, Jun 30, 2017 at 4:14 PM, TranceWorldLogic . <
tranceworldlogic at gmail.com> wrote:

> Hi Yaniv,
>
> I have enabled random generator in cluster and also in VM.
> But still not see any improvement in throughput.
>
> lsmod | grep -i virtio
> virtio_rng             13019  0
>

Are you sure it's being used? What is the qemu command line (do you see the
device in the guest?)


> virtio_balloon         13834  0
> virtio_console         28115  2
> virtio_blk             18156  4
> virtio_scsi            18361  0
> virtio_net             28024  0
> virtio_pci             22913  0
> virtio_ring            21524  7 virtio_blk,virtio_net,virtio_
> pci,virtio_rng,virtio_balloon,virtio_console,virtio_scsi
> virtio                 15008  7 virtio_blk,virtio_net,virtio_
> pci,virtio_rng,virtio_balloon,virtio_console,virtio_scsi
>
> Would please check do I missing some virtio module ?
>
> One more finding, if I set queue property in vnic profile then I got good
> throughput.
>

Interesting - I had assumed the bottleneck would be the
encryption/decryption process, not the network. What do you set exactly?
Does it matter in non-encrypted traffic as well? Are the packets (and the
whole communication) large or small (i.e, would jumbo frames help) ?
 Y.


> Thanks,
> ~Rohit
>
>
> On Fri, Jun 30, 2017 at 12:11 AM, Yaniv Kaul <ykaul at redhat.com> wrote:
>
>>
>>
>> On Thu, Jun 29, 2017 at 4:02 PM, TranceWorldLogic . <
>> tranceworldlogic at gmail.com> wrote:
>>
>>> Got it, just I need to do modprobe to add virtio-rng driver.
>>> I will try with this option.
>>>
>>
>> Make sure it is checked on the cluster.
>> Y.
>>
>>>
>>> Thanks for your help,
>>> ~Rohit
>>>
>>> On Thu, Jun 29, 2017 at 6:20 PM, TranceWorldLogic . <
>>> tranceworldlogic at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> I am using host as Centos 7.3 and guest also centos 7.3
>>>> it have 3.10 kernel version.
>>>>
>>>> But I not see virtio-rng in guest VM. Is this module come with kernel
>>>> or separately I have to install ?
>>>>
>>>> Thanks,
>>>> ~Rohit
>>>>
>>>> On Thu, Jun 29, 2017 at 5:28 PM, Yaniv Kaul <ykaul at redhat.com> wrote:
>>>>
>>>>>
>>>>>
>>>>> On Thu, Jun 29, 2017 at 10:07 AM, TranceWorldLogic . <
>>>>> tranceworldlogic at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> To increase network throughput we have changed txqueuelen of network
>>>>>> device and bridge manually. And observed  improved throughput.
>>>>>>
>>>>>
>>>>> Interesting, as I've read the default (1000) should be good enough for
>>>>> 10g, for example.
>>>>>
>>>>> Are you actually seeing errors on the interface (overruns) and such?
>>>>>
>>>>>
>>>>>>
>>>>>> But in ovirt I not see any option to increase txqueuelen.
>>>>>>
>>>>>
>>>>> Perhaps use ifup-local script to set it when the interface goes up?
>>>>>
>>>>>
>>>>>> Can someone suggest me what will be the right way to increase
>>>>>> throughput ?
>>>>>>
>>>>>> Note: I am trying to increase throughput for  ipsec packets.
>>>>>>
>>>>>
>>>>> For ipsec, probably best to ensure virtio-rng is enabled.
>>>>> Y.
>>>>>
>>>>>
>>>>>>
>>>>>> Thanks,
>>>>>> ~Rohit
>>>>>>
>>>>>> _______________________________________________
>>>>>> Users mailing list
>>>>>> Users at ovirt.org
>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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