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

Your understanding is correct issue only due to encryption/decryption process but not got idea why not word. I found that in centos 7 we not have install rng-tools. Do it required to install for random generator ? I have changes nothing I just increase number of queues in vnet. It diffenetly increase throughput and create multiple softIRQs in VM. But for normal traffic this all things are not required it gives 10G throughput. Thanks, ~Rohit On Fri, Jun 30, 2017 at 7:08 PM, Yaniv Kaul <ykaul(a)redhat.com&gt; wrote: > > > On Fri, Jun 30, 2017 at 4:14 PM, TranceWorldLogic . < > tranceworldlogic(a)gmail.com&gt; 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_p >> ci,virtio_rng,virtio_balloon,virtio_console,virtio_scsi >> virtio 15008 7 virtio_blk,virtio_net,virtio_p >> ci,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(a)redhat.com&gt; wrote: >> >>> >>> >>> On Thu, Jun 29, 2017 at 4:02 PM, TranceWorldLogic . < >>> tranceworldlogic(a)gmail.com&gt; 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(a)gmail.com&gt; 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(a)redhat.com&gt; wrote: >>>>> >>>>>> >>>>>> >>>>>> On Thu, Jun 29, 2017 at 10:07 AM, TranceWorldLogic . < >>>>>> tranceworldlogic(a)gmail.com&gt; 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(a)ovirt.org >>>>>>> http://lists.ovirt.org/mailman/listinfo/users >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >