From: "Wiles, Keith" <keith.wiles@intel.com>
To: Paul Tsvika <mozloverinweb@gmail.com>
Cc: "users@dpdk.org" <users@dpdk.org>
Subject: Re: [dpdk-users] [pktgen] pktgen Tx/Rx rates are not the same in loopback testing case
Date: Fri, 21 Jul 2017 15:40:47 +0000 [thread overview]
Message-ID: <D81B7535-D384-4981-8B8B-A4F6C760C983@intel.com> (raw)
In-Reply-To: <CAGi_MX=XPUVKT-yUnD_F7FiF8qzgSQN1HFVF1vyKq90yKo0=5A@mail.gmail.com>
> On Jul 21, 2017, at 10:11 AM, Paul Tsvika <mozloverinweb@gmail.com> wrote:
>
> Hi developers,
Attachements at scrubbed from emails to the list, so best to add links or inline the text.
What is the core layout for your system. Can you run the cpu-layout.py tool.
>
> Below is my hardware configuration:
>
> Memory: 32G ( 16 G on two channels )
> CPU: Xeon-D 1557 ( 12 cores, hyperthreading - 24 core )
> NIC: Intel X552/X557 10GBASE-T
>
> My motherboard has 2 10G ports so that I set up the testing experiment in
> loopback.
>
> I have compiled DPDK successfully and below is the steps how I configured
> pktgen
>
> $ sudo modprobe uio
> $ sudo insmod ./build/kmod/igb_uio.ko
> $ sudo ./usertools/dpdkdevbind.py -b igb_uio xxx:xx.0 xxx:xx.1
> $ sudo ./app/pktgen -c 0x1f -n 2 -- -P -m "[1:3].0, [2:4].1"
> <pktgen> start 0
>
> I use core 1 and core 3 work for port 0 tx/rx respectively. Core 2 and core
> 4 work for port 1 tx/rx respectively.
>
> I have some questions listed below:
>
> 1.
> ( check my attachment d2.png )
> The TX rate is almost 10G, however, the RX rate is much lower than TX rate.
> I suppose this should not happen. Is my configuration wrong in any place ?
> I checked other developers and TX rate normally can reach 999x and RX rate
> is almost the same as TX rate.
>
> 2.
>
> Please check the attachment ( start_log ).
>
> 2.1
> *Packet Burst 32, RX Desc 512, TX Desc 1024*, mbufs/port 8192, mbuf cache
> 1024
> Is 32 the default packet size ? How can I configure it to 64 ?
> Why RX Desc is different to TX Desc ?
>
> 2,2
> *Port 0: Link Down <Enable promiscuous mode>*
> Port 1: Link Up - speed 10000 Mbps - full-duplex <Enable promiscuous mode>
>
> Port 0 is down at some points, how can I check the root cause to this issue?
>
>
>
> Thanks
>
> --
> P.T
> -------------- next part --------------
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Regards,
Keith
next prev parent reply other threads:[~2017-07-21 15:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-21 15:11 Paul Tsvika
2017-07-21 15:40 ` Wiles, Keith [this message]
2017-07-22 1:49 ` Paul Tsvika
2017-07-25 9:04 ` Paul Tsvika
2017-07-25 14:10 ` Wiles, Keith
2017-07-26 9:02 ` Paul Tsvika
2017-07-26 14:55 ` Wiles, Keith
2017-07-26 16:44 ` Wiles, Keith
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