Dear Florin,

When using the command " create tap rx-ring-size 4096 tx-ring-size 4096 "
 VPP create the devices with default names tap0, tap1, ..tapn.

Is it possible for the user to set the name in the 'create' command line ?

Thank you in advance
-Sara

On Thu, Mar 8, 2018 at 5:32 PM, Florin Coras <fcoras.li...@gmail.com> wrote:
> Great! :-)
>
> Florin
>
>
> On Mar 8, 2018, at 1:42 AM, Sara Gittlin <sara.gitt...@gmail.com> wrote:
>
> Florin
> Thank you - i'm done -  i get very good numbers with tap both for
> throughput and latency
>
> -Sara
>
> On Thu, Mar 8, 2018 at 10:55 AM, Sara Gittlin <sara.gitt...@gmail.com>
> wrote:
>
> Thank you Florin and Dave
> Florin - I can create tap in vpp and tap in namespace - but how to
> connect them like veth-pair ?
> how traffic transmitted from the namespace tap will be received  on
> the vpp tap ? and viceversa
>
> Dave - when i running iperf3 TCP i can see ~ 1000 pps , when i'm
> running UDP i see nothing (checking why...)
>
> Thank you in advance,
> -Sara
>
> On Wed, Mar 7, 2018 at 11:33 PM, Dave Barach <dbar...@cisco.com> wrote:
>
> “show run” will probably show a very small vector size.
>
>
>
> If so, look at src/vlib/unix/input.c:linux_epoll_input(…). 10ms is exactly
> the epoll_pwait timeout value.
>
>
>
> D.
>
>
>
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Sara Gittlin
> Sent: Wednesday, March 7, 2018 2:02 PM
> To: vpp-dev@lists.fd.io
> Cc: vpp-dev@lists.fd.io
> Subject: Re: [vpp-dev] VPP As A Router Between Namespaces - 10ms latency
>
>
>
> Thank you Hau
>
> i tested w iperf got similar results. I cannot find iperf2. Anyway ns to ns
> directly without vpp is perfect 50 gbps throughput and 10us latency. Tested
> w iperf3. This is very bothering since we decided to go w vpp instead of ovs
>
> Thanks in advance
>
> -Sara
>
>
>
>
>
>
>
> בתאריך 6 במרץ 2018 20:00,‏ "Hao Fu (haof)" <h...@cisco.com> כתב:
>
> I encountered the similar issue before. Try replacing iperf3 with iperf2.
>
> Hao
>
> On 3/6/18, 8:34 AM, "vpp-dev@lists.fd.io on behalf of Sara Gittlin"
> <vpp-dev@lists.fd.io on behalf of sara.gitt...@gmail.com> wrote:
>
>    Also the throughput is very poor - iperf3 TCP ~ 2Mbps
>    what is wrong here  ?
>
>    On Tue, Mar 6, 2018 at 6:20 PM, Sara Gittlin <sara.gitt...@gmail.com>
> wrote:
>
> Hi,
> i have 2 namespaces connected with veth-pairs to vpp -  see setup here
>
> [https://wiki.fd.io/view/VPP/Configure_VPP_As_A_Router_Between_Namespaces]
>
>
> i see very big latency ~10ms when i ping between the 2 namespaces
> i expected to see latency in the order of 10's us
> -----------------------------------
> 4 bytes from 172.16.2.2: icmp_seq=1005 ttl=63 time=11.5 ms
> 64 bytes from 172.16.2.2: icmp_seq=1006 ttl=63 time=9.60 ms
> 64 bytes from 172.16.2.2: icmp_seq=1007 ttl=63 time=7.55 ms
> 64 bytes from 172.16.2.2: icmp_seq=1008 ttl=63 time=5.52 ms
> 64 bytes from 172.16.2.2: icmp_seq=1009 ttl=63 time=9.60 ms
> 64 bytes from 172.16.2.2: icmp_seq=1010 ttl=63 time=17.6 ms
> 64 bytes from 172.16.2.2: icmp_seq=1011 ttl=63 time=15.5 ms
> 64 bytes from 172.16.2.2: icmp_seq=1012 ttl=63 time=13.6 ms
> 64 bytes from 172.16.2.2: icmp_seq=1013 ttl=63 time=11.6 ms
> 64 bytes from 172.16.2.2: icmp_seq=1014 ttl=63 time=9.54 ms
> 64 bytes from 172.16.2.2: icmp_seq=1015 ttl=63 time=7.67 ms
> 64 bytes from 172.16.2.2: icmp_seq=1016 ttl=63 time=5.56 ms
> 64 bytes from 172.16.2.2: icmp_seq=1017 ttl=63 time=3.44 ms
>
> ------------------------------------
>
> Who can assist ?
>
> Thanks in advance
> -Sara
>
>
>
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> 

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