How to configure trex to use multi RX queues of NIC port?

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yulon...@intel.com

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Nov 29, 2017, 5:11:36 AM11/29/17
to TRex Traffic Generator
Hi All,

I am using trex traffic generator with intel XXV710 25g NIC,
Two xxv710 NICs connected back to back directly, using trex to TX and
RX multi streams packet with different IP address (expected that different IP
address Packets can route to different queues by RSS or flow director function of NIC)

On a single port , for TX, it can reach with 25Gbps linerate (37.21Mpps),
But for RX, it only can get 14.29Gbps (27.90Mpps), but it is expected that both RX and TX should reach linerate (37.21Mpps), as with IXIA traffic
Generator can do.

After do some investigation, I found that trex can use multi TX queues to send traffic,
But it seems that trex only can use 1 RX queue to receive traffic, so the RX side rate
Was limited.

So How to configure trex to use multi RX queues of NIC port? Any help is apprecitated.


My trex configure file as below,

#cat /etc/trex_cfg.yaml
- port_limit : 2
version : 2
interfaces : ["0000:81:00.0","0000:83:00.0"]
prefix : trex1
limit_memory : 2048
c : 8
port_info :
- dest_mac : '3c:fd:fe:a7:7a:30'
src_mac : '3c:fd:fe:a7:79:d8'
- dest_mac : '3c:fd:fe:a7:79:d8'
src_mac : '3c:fd:fe:a7:7a:30'
platform :
master_thread_id : 23
latency_thread_id : 24
dual_if :
- socket : 1
threads : [25, 26, 27, 28, 29, 30, 31, 32]


Best Regards
Yulong Pei

hanoh haim

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Nov 29, 2017, 5:17:13 AM11/29/17
to yulon...@intel.com, TRex Traffic Generator
What is the TRex mode ? Can you send the command you are using?

Hanoh


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Pei, Yulong

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Nov 29, 2017, 5:35:53 AM11/29/17
to hanoh haim, TRex Traffic Generator

I  also tried,

 

start --port 0 1 -f stl/my_pkt.py -m 100%  --pin

 

Best Regards

Yulong Pei

 

From: Pei, Yulong
Sent: Wednesday, November 29, 2017 6:35 PM
To: 'hanoh haim' <hhaim...@gmail.com>
Cc: TRex Traffic Generator <trex...@googlegroups.com>
Subject: RE: [trex-tgn] How to configure trex to use multi RX queues of NIC port?

 

Hi ,

 

1.       trex config file,

 

# cat /etc/trex_cfg.yaml

- port_limit      : 2

  version         : 2

  interfaces      : ["0000:81:00.0","0000:83:00.0"]

  prefix          : trex1

  limit_memory    : 2048

  c               : 8

  port_info       :

          - dest_mac        :   '3c:fd:fe:a7:7a:30'

            src_mac         :   '3c:fd:fe:a7:79:d8'

          - dest_mac        :   '3c:fd:fe:a7:79:d8'

            src_mac         :   '3c:fd:fe:a7:7a:30'

  platform :

           master_thread_id  : 23

           latency_thread_id : 24

           dual_if   :

                 - socket   : 1

                   threads  : [25, 26, 27, 28, 29, 30, 31, 32]

 

2.       start trex server

#cd /opt/trex-core-2.28/

#./t-rex-64 –i

 

3.       start trex console and start to send the streams

# ./trex-console

start --port 0 1 -f stl/my_pkt.py -m 100%

 

 

#cat stl/my_pkt.py

 

from trex_stl_lib.api import *

 

class STLS1(object):

 

    def __init__ (self):

        self.fsize  = 64 # the size of the packet

 

 

    def create_stream (self):

 

        # Create base packet and pad it to size

        size = self.fsize - 4; # HW will add 4 bytes ethernet FCS

        base_pkt =  Ether()/IP(src="16.0.0.1",dst="2.1.1.1")/UDP(dport=12,sport=1025)

        base_pkt1 =  Ether()/IP(src="16.0.0.2",dst="2.1.1.2")/UDP(dport=18,sport=1018)

        pad = max(0, size - len(base_pkt)) * 'x'

 

 

        return STLProfile( [ STLStream( isg = 0.0, # start in delay in usec

                                        packet = STLPktBuilder(pkt = base_pkt/pad),

                                        mode = STLTXCont(),

                                        ),

 

                             STLStream( isg = 0.0,

                                        packet  = STLPktBuilder(pkt = base_pkt1/pad),

                                        mode    = STLTXCont(),

                                        ),

 

                            ]).get_streams()

 

 

    def get_streams (self, direction = 0, **kwargs):

        # create 1 stream

        return self.create_stream()

 

 

# dynamic load - used for trex console or simulator

def register():

    return STLS1()

 

 

Best Regards

Yulong Pei

Pei, Yulong

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Nov 29, 2017, 5:36:17 AM11/29/17
to hanoh haim, TRex Traffic Generator

Hi ,

 

1.       trex config file,

 

# cat /etc/trex_cfg.yaml

- port_limit      : 2

  version         : 2

  interfaces      : ["0000:81:00.0","0000:83:00.0"]

  prefix          : trex1

  limit_memory    : 2048

  c               : 8

  port_info       :

          - dest_mac        :   '3c:fd:fe:a7:7a:30'

            src_mac         :   '3c:fd:fe:a7:79:d8'

          - dest_mac        :   '3c:fd:fe:a7:79:d8'

            src_mac         :   '3c:fd:fe:a7:7a:30'

  platform :

           master_thread_id  : 23

           latency_thread_id : 24

           dual_if   :

                 - socket   : 1

                   threads  : [25, 26, 27, 28, 29, 30, 31, 32]

 

2.       start trex server

From: hanoh haim [mailto:hhaim...@gmail.com]

hanoh haim

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Nov 29, 2017, 5:47:52 AM11/29/17
to Pei, Yulong, TRex Traffic Generator
In that case you should not have a problem. As all packets are only counted and drop.
Check that you are not in service mode.

Hanoh

hanoh haim

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Nov 29, 2017, 6:28:10 AM11/29/17
to Pei, Yulong, TRex Traffic Generator
Another idea this NIC is partially supported with DPDK 17.02
Latest code in GitHub support DPDK 17.11 
I would try it

Hanoh

Pei, Yulong

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Nov 30, 2017, 1:35:48 AM11/30/17
to hanoh haim, TRex Traffic Generator

Hi Hanoh,

 

I tried that latest trex v2.32 version today,  also has the issue.

 

What do you mean “Check that you are not in service mode”?

 

Is there any way to do some debugging to root cause the issue ?

 

Thanks & Best Regards

hanoh haim

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Nov 30, 2017, 2:37:16 AM11/30/17
to Pei, Yulong, TRex Traffic Generator
Hi, 
v2.32 is with DPDK 17.02 
try to take latest *code* from github and compile it 
see wiki how to do that 

Hanoh

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Pei, Yulong

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Nov 30, 2017, 3:58:51 AM11/30/17
to hanoh haim, TRex Traffic Generator

Hi Hanoh,

 

Just download the code,

 

git clone https://github.com/cisco-system-traffic-generator/trex-core.git

 

cd  trex-core/

cd  linux_dpdk/

./b configure

./b build

 

cd scripts/

./t-rex-64 –i

 

./trex-console

start --port 0 1 -f stl/my_pkt.py -m 100% --pin

the result is same as trex v2.32 and v2.28.

 

Thanks & Best Regards

Yulong Pei

 

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hanoh haim

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Nov 30, 2017, 4:09:11 AM11/30/17
to Pei, Yulong, TRex Traffic Generator
Can you send the output of the Console TUI in this case?



On Thu, Nov 30, 2017 at 10:58 AM, Pei, Yulong <yulon...@intel.com> wrote:

Hi Hanoh,

 

Just download the code,

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Pei, Yulong

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Nov 30, 2017, 4:16:56 AM11/30/17
to hanoh haim, TRex Traffic Generator

Hi,

 

Attached trex_tui_output.png

 

Best Regards

Yulong Pei

 

From: hanoh haim [mailto:hhaim...@gmail.com]
Sent: Thursday, November 30, 2017 5:09 PM
To: Pei, Yulong <yulon...@intel.com>
Cc: TRex Traffic Generator <trex...@googlegroups.com>
Subject: Re: [trex-tgn] How to configure trex to use multi RX queues of NIC port?

 

Can you send the output of the Console TUI in this case?

 

 

 

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trex_tui_output.png

hanoh haim

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Nov 30, 2017, 4:32:59 AM11/30/17
to Pei, Yulong, TRex Traffic Generator
Inline image 5

$start -f stl/bench.py -t size=64,vm=cached --port 0 -m 63% --force

This is with XL710. the loopback is not to the same NIC in our case. 
in case both Tx and Rx on the same NIC the number would be lower (in the Rx side) 
the NIC can reach Tx25Gb/Rx=25 with different ports. not sure about the same port

the queue_full indicate that you have back-pressure from the TX queue for some reason.

Could you do the same test with different ports? Tx connect to Rx in different port? 


thanks,
Hanoh 

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Pei, Yulong

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Nov 30, 2017, 5:02:56 AM11/30/17
to hanoh haim, TRex Traffic Generator

Hi ,

 

My test environment is  2  XXV710 25G NIC CARDs, each card have 2 ports,  I am using

1 port of first card to connect to 1 port of second card.

 

(for this setup, if using ixia, with 64byte packet , TX and RX both can reach 25G linerate 37.21 Mpps).

 

Run the command:

 

$start -f stl/bench.py -t size=64,vm=cached --port 0 -m 100% --force

 

The tui output result as the attachment trex_tui_0_1.png.

 

Tx 37.25 Mpps  is good

Rx 27.95 Mpps,  but it should 37.25Mpps.

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trex_tui_0_1.png

hanoh haim

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Nov 30, 2017, 5:06:58 AM11/30/17
to Pei, Yulong, TRex Traffic Generator
Can you send the NUMA of each card?
./dpdk_setup_nic.py -t 
Output 

Hanoh

Pei, Yulong

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Nov 30, 2017, 5:15:04 AM11/30/17
to hanoh haim, TRex Traffic Generator

# ./dpdk_setup_ports.py -t

 

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

| ID | NUMA |   PCI   |        MAC        |                  Name                   | Driver  | Linux IF |  Active  |

+====+======+=========+===================+=========================================+=========+==========+==========+

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

| 6  | 1    | 81:00.0 | 3c:fd:fe:a7:79:d8 | Device 158b                             | igb_uio |          |          |

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

| 7  | 1    | 81:00.1 | 3c:fd:fe:a7:79:d9 | Device 158b                             | i40e    | ens801f1 |          |

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

| 8  | 1    | 83:00.0 | 3c:fd:fe:a7:7a:30 | Device 158b                             | igb_uio |          |          |

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

| 9  | 1    | 83:00.1 | 3c:fd:fe:a7:7a:31 | Device 158b                             | i40e    | ens802f1 |          |

+----+------+---------+-------------------+-----------------------------------------+---------+----------+----------+

 

 

The red two was used by trex,  both at NUMA node 1.

hanoh haim

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Nov 30, 2017, 5:19:29 AM11/30/17
to Pei, Yulong, TRex Traffic Generator
In that case I don’t understand why XL710 can handle the rate and XXV710 can’t.

Again RSS is not relevant as packets are dropped in this scenario 

Hanoh

Pei, Yulong

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Dec 1, 2017, 3:46:50 AM12/1/17
to hanoh haim, TRex Traffic Generator, Xu, Qian Q

Hi Hanoh,

 

Today we tested Trex on XL710 40G NIC and XXV710 25G NIC,

With 64byte packet streams,  both XL710 40G and XXV710 25G , RX pps only can reach ~27.9 Mpps.

Attached detail test steps in “Trex back to back test for  XL710 and XXV710.docx”

 

But we also run the same test for it with DPDK and IXIA traffic generator, the expected Rx pps can be gotten.

 

So it seems that Trex have some kind of issue on i40e driver when do packet RX, can you help to fix it ?

 

 

$start -f stl/bench.py -t size=64,vm=cached --port 0 -m 63% --force

Trex back to back test for XL710 and XXV710.docx

hanoh haim

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Dec 1, 2017, 4:05:41 AM12/1/17
to Pei, Yulong, TRex Traffic Generator, Xu, Qian Q
Hi,
1. I’ve sent our setup results it is Rx=42/Tx=42 mpps so it something with setup configuration 

2. You can’t compare IXIA setup results to TRex results because it is a different NIC configuration. In case of IXIA you are moving packets from Rx queues to Tx queues. In case of TRex you are generating the traffic from scratch and *dropping* it in the NIC.


3. From the email I see that you are from Intel maybe it would be easier for you to consult internally why it happen with some NIC 

Could you say what is your Firmware? Our is 5.04 

We have another setup with Cisco FW 5.04 and Intel 6.01

Thanks,
Hanoh


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Pei, Yulong

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Dec 1, 2017, 4:11:11 AM12/1/17
to hanoh haim, TRex Traffic Generator, Xu, Qian Q

For mine,  firmware-version: 6.01 0x80003221 1.1691.0

Yaroslav Brustinov

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Dec 1, 2017, 6:03:00 AM12/1/17
to Pei, Yulong, Xu, Qian Q, TRex Traffic Generator, hanoh haim

What is the output of trex-console command:
stats -x
?

hanoh haim

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Dec 1, 2017, 6:40:22 AM12/1/17
to Yaroslav Brustinov, Pei, Yulong, Xu, Qian Q, TRex Traffic Generator

Hi Yulong, 


Could you check this branch? It is a quick potential fix with 3 drop queues.

I couldn’t check it because we don't have XL710 with FW=6.0.1  only 5.0.4.

on X710 there is no issue as queue is for 10gb 

https://github.com/hhaim/trex-core/tree/xl710_drop_queue

thanks,
Hanoh


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Pei, Yulong

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Dec 3, 2017, 10:40:44 PM12/3/17
to hanoh haim, Yaroslav Brustinov, Xu, Qian Q, TRex Traffic Generator

Hi Hanoh,

 

Thanks for your help ,  I  have done the test it today,

 

#git clone  -b xl710_drop_queue https://github.com/hhaim/trex-core.git

#cd linux_dpdk

#./b configure

#./b build

# cd scripts

 

Run the same test as previous, the result also same with previous TX 37.24 Mpps /RX 27.90 Mpps,  no RX improvement.

 

Best Regards

Yulong Pei

 

From: hanoh haim [mailto:hhaim...@gmail.com]
Sent: Friday, December 1, 2017 7:40 PM
To: Yaroslav Brustinov <y.bru...@gmail.com>
Cc: Pei, Yulong <yulon...@intel.com>; Xu, Qian Q <qian...@intel.com>; TRex Traffic Generator <trex...@googlegroups.com>
Subject: Re: [trex-tgn] How to configure trex to use multi RX queues of NIC port?

 

Hi Yulong, 

 

Could you check this branch? It is a quick potential fix with 3 drop queues.

I couldn’t check it because we don't have XL710 with FW=6.0.1  only 5.0.4.

on X710 there is no issue as queue is for 10gb 

 

https://github.com/hhaim/trex-core/tree/xl710_drop_queue

 

thanks,

Hanoh

 

On Fri, Dec 1, 2017 at 1:02 PM, Yaroslav Brustinov <y.bru...@gmail.com> wrote:

What is the output of trex-console command:
stats -x
?

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JS

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Jan 30, 2018, 11:22:44 AM1/30/18
to TRex Traffic Generator

Hi,
I am using Trex in a virtual environment with SRIOV. When I try to assign 2 cores to the traffic ports, it gives an error " Error: the number of cores should be 1 when the driver support only one tx queue and one rx queue. Please use -c 1 "

I am getting line rate upto 256bytes packet size. For 64bytes I am only getting around 4Gbps.

root@trex:~/trex/v2.35# sudo ./t-rex-64 -i -c 6
Killing Scapy server... Scapy server is killed
Starting Scapy server.... Scapy server is started
The ports are bound/configured.
Starting TRex v2.35 please wait ...
set driver name net_ixgbe_vf
driver capability : TCP_UDP_OFFLOAD TSO
Number of ports found: 2
Error: the number of cores should be 1 when the driver support only one tx queue and one rx queue. Please use -c 1


root@trex:~/trex/v2.35# ./dpdk_setup_ports.py -s

Network devices using DPDK-compatible driver
============================================
0000:00:06.0 '82599 Ethernet Controller Virtual Function' drv=igb_uio unused=ixgbevf,vfio-pci,uio_pci_generic
0000:00:07.0 '82599 Ethernet Controller Virtual Function' drv=igb_uio unused=ixgbevf,vfio-pci,uio_pci_generic

Network devices using kernel driver
===================================
0000:00:03.0 'Virtio network device' if=ens3 drv=virtio-pci unused=igb_uio,vfio-pci,uio_pci_generic *Active*

Other network devices
=====================

Any thoughts?

hanoh haim

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Mar 2, 2018, 1:14:45 AM3/2/18
to Pei, Yulong, Yaroslav Brustinov, Xu, Qian Q, TRex Traffic Generator
Hi Yulong, 
There is a progress with understanding the issue. 
The Intel FW engineer confirmed that the 27MPPS is a *feature* of FW 6.0.1 and it is by design. (this is the maximum drop rate)
We are working to find a workaround to this for TRex use case.
The only workaround to get to 42MPPS is to reduce the FW version to 5.0.5/4

I've open a TRex issue here:



thanks,
Hanoh


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Pei, Yulong

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Mar 6, 2018, 11:40:26 PM3/6/18
to hanoh haim, Yaroslav Brustinov, Xu, Qian Q, TRex Traffic Generator

Hi Hanoh,

 

Thank you very much.

 

Best Regards

Yulong Pei

 

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Sent: Friday, March 2, 2018 2:15 PM
To: Pei, Yulong <yulon...@intel.com>

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Xu, Qian Q

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Mar 7, 2018, 12:05:04 AM3/7/18
to Pei, Yulong, hanoh haim, Yaroslav Brustinov, TRex Traffic Generator

But it means FVL25G can’t work with trex to get maximum number since FVL25G can’t use 5.0.5/4.

As you know, if we use testpmd to check FVL25G RX/TX rate, then we will not get limitation on FVL25G RX, so is it anything that trex can improve here?

 

From: Pei, Yulong

Sent: Tuesday, March 6, 2018 9:40 PM
To: hanoh haim <hhaim...@gmail.com>

Pei, Yulong

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Mar 8, 2018, 2:24:09 AM3/8/18
to Xu, Qian Q, hanoh haim, Yaroslav Brustinov, TRex Traffic Generator

Hi Hanoh,

 

Intel firmware team guys said that Trex should enable the receive q since drop q with firmware 6.01 has limitation.

Do you consider to enable receive q for XL710 and XXV710 ?

hanoh haim

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Mar 8, 2018, 2:44:17 AM3/8/18
to Pei, Yulong, TRex Traffic Generator, Xu, Qian Q, Yaroslav Brustinov
We are planning to add more scalable stream statistics mode for all NICs.
The limitation of this mode would be much more CPU resource and less accurate latency.
Using RxQ is not free, especially in high rates.
I still didn’t get an answer if there is a workaround in the new FW or if this is going to be fixed in newer version.
For XL710/X710 there is an option to downgrade to 5.0.4 


Thanks,
Hanoh
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