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XL710 too many irq

AndriiV
Novice
2,260 Views

Hello!

I have a problem with Intel XL710,  after 22 Gbps of traffic some cores of processor loads 100% IRQ and traffic goes down.

 

atop.png

 

There are latast firmware and driver:

 

 

 

# ethtool -i ens2
driver: i40e
version: 2.24.6
firmware-version: 9.40 0x8000ecc0 1.3429.0
expansion-rom-version:
bus-info: 0000:d8:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

 

 

 

 

graphs.png

I read this guide

And made all possible configurations.  But nothing changes

 

 

 

382  set_irq_affinity local ens2
  384  set_irq_affinity all ens2
  387  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 0 tx-usecs 0
  389  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 5000 tx-usecs 20000
  391  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 10000 tx-usecs 20000
  393  ethtool -g ens2
  394  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 84 tx-usecs 84
  396  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 62 tx-usecs 62
  398   ethtool -S ens2 | grep drop
  399   ethtool -S ens2 | grep drop
  400   ethtool -S ens2 | grep drop
  401   ethtool -S ens2 | grep drop
  402  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 336 tx-usecs 84
  403   ethtool -S ens2 | grep drop
  404   ethtool -S ens2 | grep drop
  406   ethtool -S ens2 | grep drop
  407  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 672 tx-usecs 84
  408   ethtool -S ens2 | grep drop
  409   ethtool -S ens2 | grep drop
  411   ethtool -S ens2 | grep drop
  412   ethtool -S ens2 | grep drop
  425   ethtool -S ens2 | grep drop
  426   ethtool -S ens2 | grep drop
  427  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 8400 tx-usecs 840
  428  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 4200 tx-usecs 840
  430   ethtool -S ens2 | grep drop
  431   ethtool -S ens2 | grep drop
  432   ethtool -S ens2 | grep drop
  433   ethtool -S ens2 | grep drop
  434  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 4200 tx-usecs 1680
  435   ethtool -S ens2 | grep drop
  436   ethtool -S ens2 | grep drop
  439  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 3200 tx-usecs 3200
  469  ethtool -a ens2
  472  ethtool ens2
  473  ethtool -i ens2
  475  ethtool -i ens2
  476  ethtool ens2
  482  ethtool -C ens2 adaptive-rx on
  484  ethtool -c ens2
  486  ethtool -C ens2 adaptive-tx on
  487  ethtool -c ens2
  492  history | grep ens2
  494  ethtool -m ens2
  499  ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 4200 tx-usecs 1600
  501  history | grep ens2

 

 

 

 

Server configuration:

80 cores  Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz

RAM 960 GB

8 x SAMSUNG MZQLB7T6HMLA-000AZ NVME disks

Ethernet Controller XL710 for 40GbE QSFP+ (rev 02)

 

What can be done with the settings of this network card to solve the problem?

 

On another server with a similar configuration, but a different network cards, everything is fine

atop_2.png

graphs_2.png

Server configuration:

88 cores Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz

RAM 512 GB

8 x SAMSUNG MZQLB7T6HMLA-00007 NVME disks

4 x 82599ES 10-Gigabit SFI/SFP+ Network Connection

 

 

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25 Replies
Simon-Intel
Employee
1,793 Views

Hi AndriiV,

 

Thank you for reaching out to the Intel community. We sincerely apologize for the delay in our response.

 

We acknowledge receipt of your concern and want to assure you that assisting you is our top priority. To effectively troubleshoot the issue you're facing, we require some additional information from your end.

 

Could you kindly provide the following details?

  1. System Model:
  2. Operating System:
  3. Is the Ethernet card embedded on the board?
  4. Was the Ethernet card working before? Have any changes been made recently?

 

Your prompt response with this information will greatly assist us in diagnosing and resolving the issue as quickly as possible.

 

We look forward to hearing from you soon.

 

Best Regards,

Simon

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AndriiV
Novice
1,783 Views

Hello Simon!

1.  Supermicro SuperServer 1029U-TRTP2

2.  Debian 10.13

# uname -a
Linux 15224 4.19.0-26-amd64 #1 SMP Debian 4.19.304-1 (2024-01-09) x86_64 GNU/Linux

3. No

4. No,  I am using XL710 card for a first time

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Simon-Intel
Employee
1,755 Views

Hi AndriiV,

 

Thank you for sharing the requested details.

 

As you mentioned, there is another server with a similar configuration, but with different network cards. Could you please share the server motherboard and the network card details?

 

We look forward to hearing from you soon.

 

Best Regards,

Simon

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AndriiV
Novice
1,750 Views

Hi Simon!

 

Supermicro SuperServer 1028U-TR4+

Motherboard: X10DRU-i+

Debian 10.13

# uname -a
Linux 157540 4.19.0-25-amd64 #1 SMP Debian 4.19.289-2 (2023-08-08) x86_64 GNU/Linux

 4x10Gbps network cards:

87:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
87:00.1 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
88:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
88:00.1 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)

# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer3+4 (1)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200

802.3ad info
LACP rate: fast
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535

 

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Simon-Intel
Employee
1,728 Views

Hi Andrii,

Good day!

Thank you for providing the requested details.

We are currently investigating this inquiry with our resources, and we will provide you with an update at the earliest opportunity.

Thank you for your patience and understanding.

Best regards,
Simon

Simon-Intel
Employee
1,625 Views

Hi Andrii,

 

Good Day!

 

Thank you for your patience as we work to resolve the issue you've encountered. We at Intel are fully committed to ensuring your satisfaction.

 

To address your concern, please refer to the following link for detailed instructions: Intel Ethernet 700 Series Linux Performance Tuning Guide - Section 4.1.

 

Your understanding and cooperation are greatly appreciated.

 

Best regards,

Simon


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AndriiV
Novice
1,607 Views

Hi Simon!

As you can see my first message in this topic. I already read this guide and made all tunnings. I tried

 

382  set_irq_affinity local ens2
  384  set_irq_affinity all ens2

 

 With "local" configuration 100% IRQ on some cores at 19Gbps yet. You can see atop screen after 

set_irq_affinity local ens2

atop_3.png

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AndriiV
Novice
1,578 Views

I think the problem is that the traffic is unevenly distributed across the queues

0 Kudos
Simon-Intel
Employee
1,558 Views

Hi Andrii,


Good Day!


Firstly, I'd like to extend our apologies for any inconvenience caused by our previous communication. Your detailed explanation of the issue and server configuration was immensely helpful, and we appreciate your patience and cooperation.


I'm writing to inform you that we've escalated the matter to our next level team for further investigation and resolution. Rest assured, we're prioritizing this issue to ensure a swift resolution.


We will keep you updated on the progress and provide any necessary information as soon as it becomes available.


Once again, thank you for your understanding and cooperation throughout this process.


Best regards,

Simon


0 Kudos
Azeem_Intel
Employee
1,254 Views

Hi AndriiV,

 

Greetings for the day!

 

 

Thank you for your patience. We attempted to replicate the issue in the lab with the latest drivers/NVM (FVL9.5) but were unable to do so.

 

Note: Results are the same whether I tune the interface level or not. This indicates that I can achieve 37.7Gbps throughput with or without any interface level tuning, and there are also no packet drops.

 

Results and tunings can be found in the attached document. Please have a look.

 

Please clarify below question

  1. According to the link you provided, there are two server configurations with different processor details. Does this mean that the issue persists with both configurations?
  2. The customer experimented with different Tx/Rx interrupt coalescing times. Did you observe consistent results each time?
  3. You also attempted to see if there were any packet drops. Are there any drops? We are not seeing any drops.
  4. Are you still experiencing a maximum throughput of 22 Gbps even after multiple tunings?
  5. Could you please share the OS and kernel details of the setup provided by you

 

Your configuration vs our configuration:

you used -> Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz

We used -> Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz

 

Both CPUs offer high performance , but differences between them may affect performance depending on the workload. The details are as follows::

  1. No.of cores and threads
  2. Clock speed
  3. TDP (Thermal Design Power)
  4. Cache size.

 

Could you please try the tunings recommended in the attached document?

 

Best Regards,

Azeem_Intel

0 Kudos
AndriiV
Novice
1,226 Views

Hi Azeem!

Thanks for your job!

1. As you can see, in the second configuration there are completely different network cards that use a different driver. I provided the second configuration rather to show that these two servers are used in the same data center, in the same project, almost the same configuration (in particular disks), they are caching servers, the load is distributed between them the same.

 

2. Yes, I didn’t notice any special changes.

3. 14.05.2024 (3 days ago) I updated driver and firmware for the latest.

# ethtool -i ens2
driver: i40e
version: 2.25.7
firmware-version: 9.50 0x8000f163 1.3597.0
expansion-rom-version:
bus-info: 0000:d8:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

Packet count for these 3 days:

# ethtool -S ens2
NIC statistics:
     rx_packets: 137882815105
     tx_packets: 274937740003
     rx_bytes: 84537446775570
     tx_bytes: 401450641546052
     rx_errors: 2022092
     tx_errors: 0
     rx_dropped: 229385
     tx_dropped: 0
     collisions: 0
     rx_length_errors: 0
     rx_crc_errors: 0
     rx_unicast: 137882060073
     tx_unicast: 274936560996
     rx_multicast: 0
     tx_multicast: 0
     rx_broadcast: 343515
     tx_broadcast: 0
     rx_unknown_protocol: 0
     tx_linearize: 2313
     tx_force_wb: 0
     tx_busy: 0
     tx_stopped: 5303
     rx_alloc_fail: 0
     rx_pg_alloc_fail: 0
     rx_cache_reuse: 368417417274
     tx-0.packets: 25837685
     tx-0.bytes: 33979734149
     rx-0.packets: 168279842
     rx-0.bytes: 170602932069
     rx-0.xdp.pass: 0
     rx-0.xdp.drop: 0
     rx-0.xdp.tx: 0
     rx-0.xdp.unknown: 0
     rx-0.xdp.redirect: 0
     rx-0.xdp.redirect_fail: 0
     tx-1.packets: 5355399756
     tx-1.bytes: 7812404286883
     rx-1.packets: 2516813387
     rx-1.bytes: 1774770706455
     rx-1.xdp.pass: 0
     rx-1.xdp.drop: 0
     rx-1.xdp.tx: 0
     rx-1.xdp.unknown: 0
     rx-1.xdp.redirect: 0
     rx-1.xdp.redirect_fail: 0
     tx-2.packets: 21682826
     tx-2.bytes: 28480770887
     rx-2.packets: 161801610
     rx-2.bytes: 164209951123
     rx-2.xdp.pass: 0
     rx-2.xdp.drop: 0
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     rx-2.xdp.unknown: 0
     rx-2.xdp.redirect: 0
     rx-2.xdp.redirect_fail: 0
     tx-3.packets: 5301254825
     tx-3.bytes: 7734386600593
     rx-3.packets: 2494644834
     rx-3.bytes: 1756602843454
     rx-3.xdp.pass: 0
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     rx-3.xdp.redirect: 0
     rx-3.xdp.redirect_fail: 0
     tx-4.packets: 15224069
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     rx-4.xdp.pass: 0
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     rx-4.xdp.redirect: 0
     rx-4.xdp.redirect_fail: 0
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     tx-5.bytes: 7666284532673
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     rx-5.xdp.redirect_fail: 0
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     rx-6.xdp.redirect_fail: 0
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     rx-7.packets: 2467490966
     rx-7.bytes: 1727873025410
     rx-7.xdp.pass: 0
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     rx-7.xdp.redirect_fail: 0
     tx-8.packets: 9928118
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     rx-8.packets: 144579783
     rx-8.bytes: 147087173052
     rx-8.xdp.pass: 0
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     rx-8.xdp.redirect_fail: 0
     tx-9.packets: 5204698936
     tx-9.bytes: 7595022219312
     rx-9.packets: 2449855836
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     rx-9.xdp.pass: 0
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     tx-10.packets: 8175661
     tx-10.bytes: 10073920773
     rx-10.packets: 142968142
     rx-10.bytes: 146695366930
     rx-10.xdp.pass: 0
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     rx-10.xdp.redirect_fail: 0
     tx-11.packets: 5157512915
     tx-11.bytes: 7526504135406
     rx-11.packets: 2427772204
     rx-11.bytes: 1684990668038
     rx-11.xdp.pass: 0
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     rx-11.xdp.redirect_fail: 0
     tx-12.packets: 7585912
     tx-12.bytes: 9201941239
     rx-12.packets: 143219886
     rx-12.bytes: 146971694227
     rx-12.xdp.pass: 0
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     tx-13.packets: 5153818605
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     rx-15.xdp.pass: 0
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     rx-15.xdp.redirect_fail: 0
     tx-16.packets: 6288014
     tx-16.bytes: 7422482221
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     rx-16.bytes: 147757208628
     rx-16.xdp.pass: 0
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     rx-16.xdp.redirect_fail: 0
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     rx-17.packets: 2431759357
     rx-17.bytes: 1682905350979
     rx-17.xdp.pass: 0
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     tx-18.bytes: 6783176550
     rx-18.packets: 144656301
     rx-18.bytes: 149198188478
     rx-18.xdp.pass: 0
     rx-18.xdp.drop: 0
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     rx-18.xdp.redirect_fail: 0
     tx-19.packets: 5133828421
     tx-19.bytes: 7492497965828
     rx-19.packets: 2426018808
     rx-19.bytes: 1680498388729
     rx-19.xdp.pass: 0
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     tx-20.bytes: 42713819553
     rx-20.packets: 174510718
     rx-20.bytes: 172945330141
     rx-20.xdp.pass: 0
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     tx-21.bytes: 7155880834589
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     tx-24.bytes: 20913960784
     rx-24.packets: 155601104
     rx-24.bytes: 157432173356
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     tx-25.packets: 4764271626
     tx-25.bytes: 6946701442665
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     tx-26.packets: 12405218
     tx-26.bytes: 15942960396
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     rx-26.bytes: 150386448593
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     tx-27.packets: 4756551502
     tx-27.bytes: 6936202019721
     rx-27.packets: 2197427464
     rx-27.bytes: 1630471167551
     rx-27.xdp.pass: 0
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     tx-28.packets: 10151000
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     rx-28.bytes: 148599813147
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     rx-29.bytes: 1620663612882
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     rx-32.packets: 140971438
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     vf108.tx_errors: 0
     vf109.rx_bytes: 0
     vf109.rx_unicast: 0
     vf109.rx_multicast: 0
     vf109.rx_broadcast: 0
     vf109.rx_discards: 0
     vf109.rx_unknown_protocol: 0
     vf109.tx_bytes: 0
     vf109.tx_unicast: 0
     vf109.tx_multicast: 0
     vf109.tx_broadcast: 0
     vf109.tx_discards: 0
     vf109.tx_errors: 0
     vf110.rx_bytes: 0
     vf110.rx_unicast: 0
     vf110.rx_multicast: 0
     vf110.rx_broadcast: 0
     vf110.rx_discards: 0
     vf110.rx_unknown_protocol: 0
     vf110.tx_bytes: 0
     vf110.tx_unicast: 0
     vf110.tx_multicast: 0
     vf110.tx_broadcast: 0
     vf110.tx_discards: 0
     vf110.tx_errors: 0
     vf111.rx_bytes: 0
     vf111.rx_unicast: 0
     vf111.rx_multicast: 0
     vf111.rx_broadcast: 0
     vf111.rx_discards: 0
     vf111.rx_unknown_protocol: 0
     vf111.tx_bytes: 0
     vf111.tx_unicast: 0
     vf111.tx_multicast: 0
     vf111.tx_broadcast: 0
     vf111.tx_discards: 0
     vf111.tx_errors: 0
     vf112.rx_bytes: 0
     vf112.rx_unicast: 0
     vf112.rx_multicast: 0
     vf112.rx_broadcast: 0
     vf112.rx_discards: 0
     vf112.rx_unknown_protocol: 0
     vf112.tx_bytes: 0
     vf112.tx_unicast: 0
     vf112.tx_multicast: 0
     vf112.tx_broadcast: 0
     vf112.tx_discards: 0
     vf112.tx_errors: 0
     vf113.rx_bytes: 0
     vf113.rx_unicast: 0
     vf113.rx_multicast: 0
     vf113.rx_broadcast: 0
     vf113.rx_discards: 0
     vf113.rx_unknown_protocol: 0
     vf113.tx_bytes: 0
     vf113.tx_unicast: 0
     vf113.tx_multicast: 0
     vf113.tx_broadcast: 0
     vf113.tx_discards: 0
     vf113.tx_errors: 0
     vf114.rx_bytes: 0
     vf114.rx_unicast: 0
     vf114.rx_multicast: 0
     vf114.rx_broadcast: 0
     vf114.rx_discards: 0
     vf114.rx_unknown_protocol: 0
     vf114.tx_bytes: 0
     vf114.tx_unicast: 0
     vf114.tx_multicast: 0
     vf114.tx_broadcast: 0
     vf114.tx_discards: 0
     vf114.tx_errors: 0
     vf115.rx_bytes: 0
     vf115.rx_unicast: 0
     vf115.rx_multicast: 0
     vf115.rx_broadcast: 0
     vf115.rx_discards: 0
     vf115.rx_unknown_protocol: 0
     vf115.tx_bytes: 0
     vf115.tx_unicast: 0
     vf115.tx_multicast: 0
     vf115.tx_broadcast: 0
     vf115.tx_discards: 0
     vf115.tx_errors: 0
     vf116.rx_bytes: 0
     vf116.rx_unicast: 0
     vf116.rx_multicast: 0
     vf116.rx_broadcast: 0
     vf116.rx_discards: 0
     vf116.rx_unknown_protocol: 0
     vf116.tx_bytes: 0
     vf116.tx_unicast: 0
     vf116.tx_multicast: 0
     vf116.tx_broadcast: 0
     vf116.tx_discards: 0
     vf116.tx_errors: 0
     vf117.rx_bytes: 0
     vf117.rx_unicast: 0
     vf117.rx_multicast: 0
     vf117.rx_broadcast: 0
     vf117.rx_discards: 0
     vf117.rx_unknown_protocol: 0
     vf117.tx_bytes: 0
     vf117.tx_unicast: 0
     vf117.tx_multicast: 0
     vf117.tx_broadcast: 0
     vf117.tx_discards: 0
     vf117.tx_errors: 0
     vf118.rx_bytes: 0
     vf118.rx_unicast: 0
     vf118.rx_multicast: 0
     vf118.rx_broadcast: 0
     vf118.rx_discards: 0
     vf118.rx_unknown_protocol: 0
     vf118.tx_bytes: 0
     vf118.tx_unicast: 0
     vf118.tx_multicast: 0
     vf118.tx_broadcast: 0
     vf118.tx_discards: 0
     vf118.tx_errors: 0
     vf119.rx_bytes: 0
     vf119.rx_unicast: 0
     vf119.rx_multicast: 0
     vf119.rx_broadcast: 0
     vf119.rx_discards: 0
     vf119.rx_unknown_protocol: 0
     vf119.tx_bytes: 0
     vf119.tx_unicast: 0
     vf119.tx_multicast: 0
     vf119.tx_broadcast: 0
     vf119.tx_discards: 0
     vf119.tx_errors: 0
     vf120.rx_bytes: 0
     vf120.rx_unicast: 0
     vf120.rx_multicast: 0
     vf120.rx_broadcast: 0
     vf120.rx_discards: 0
     vf120.rx_unknown_protocol: 0
     vf120.tx_bytes: 0
     vf120.tx_unicast: 0
     vf120.tx_multicast: 0
     vf120.tx_broadcast: 0
     vf120.tx_discards: 0
     vf120.tx_errors: 0
     vf121.rx_bytes: 0
     vf121.rx_unicast: 0
     vf121.rx_multicast: 0
     vf121.rx_broadcast: 0
     vf121.rx_discards: 0
     vf121.rx_unknown_protocol: 0
     vf121.tx_bytes: 0
     vf121.tx_unicast: 0
     vf121.tx_multicast: 0
     vf121.tx_broadcast: 0
     vf121.tx_discards: 0
     vf121.tx_errors: 0
     vf122.rx_bytes: 0
     vf122.rx_unicast: 0
     vf122.rx_multicast: 0
     vf122.rx_broadcast: 0
     vf122.rx_discards: 0
     vf122.rx_unknown_protocol: 0
     vf122.tx_bytes: 0
     vf122.tx_unicast: 0
     vf122.tx_multicast: 0
     vf122.tx_broadcast: 0
     vf122.tx_discards: 0
     vf122.tx_errors: 0
     vf123.rx_bytes: 0
     vf123.rx_unicast: 0
     vf123.rx_multicast: 0
     vf123.rx_broadcast: 0
     vf123.rx_discards: 0
     vf123.rx_unknown_protocol: 0
     vf123.tx_bytes: 0
     vf123.tx_unicast: 0
     vf123.tx_multicast: 0
     vf123.tx_broadcast: 0
     vf123.tx_discards: 0
     vf123.tx_errors: 0
     vf124.rx_bytes: 0
     vf124.rx_unicast: 0
     vf124.rx_multicast: 0
     vf124.rx_broadcast: 0
     vf124.rx_discards: 0
     vf124.rx_unknown_protocol: 0
     vf124.tx_bytes: 0
     vf124.tx_unicast: 0
     vf124.tx_multicast: 0
     vf124.tx_broadcast: 0
     vf124.tx_discards: 0
     vf124.tx_errors: 0
     vf125.rx_bytes: 0
     vf125.rx_unicast: 0
     vf125.rx_multicast: 0
     vf125.rx_broadcast: 0
     vf125.rx_discards: 0
     vf125.rx_unknown_protocol: 0
     vf125.tx_bytes: 0
     vf125.tx_unicast: 0
     vf125.tx_multicast: 0
     vf125.tx_broadcast: 0
     vf125.tx_discards: 0
     vf125.tx_errors: 0
     vf126.rx_bytes: 0
     vf126.rx_unicast: 0
     vf126.rx_multicast: 0
     vf126.rx_broadcast: 0
     vf126.rx_discards: 0
     vf126.rx_unknown_protocol: 0
     vf126.tx_bytes: 0
     vf126.tx_unicast: 0
     vf126.tx_multicast: 0
     vf126.tx_broadcast: 0
     vf126.tx_discards: 0
     vf126.tx_errors: 0
     vf127.rx_bytes: 0
     vf127.rx_unicast: 0
     vf127.rx_multicast: 0
     vf127.rx_broadcast: 0
     vf127.rx_discards: 0
     vf127.rx_unknown_protocol: 0
     vf127.tx_bytes: 0
     vf127.tx_unicast: 0
     vf127.tx_multicast: 0
     vf127.tx_broadcast: 0
     vf127.tx_discards: 0
     vf127.tx_errors: 0

As you can see, there are packet losses

4. Yes. Below are the graphs of these two servers for the last 2 days. As you can see, on the second server with 4x10G cards the traffic in peaks was 23 Gbit/s, and on the first with the XL710 card it was only 21 Gbit/s. Although in theory it should be the same.

graphs_3.png

graphs_4.png

 

5. Linux 15224 4.19.0-26-amd64 #1 SMP Debian 4.19.304-1 (2024-01-09) x86_64 GNU/Linux

You can download it from https://packages.debian.org/buster/linux-image-4.19.0-26-amd64

# cat /etc/debian_version
10.13

You can download it from https://cdimage.debian.org/cdimage/archive/10.13.0/amd64/iso-cd/debian-10.13.0-amd64-netinst.iso

 

Thank you for your document. I'll try the settings from it. I’m really not sure that it will be better with 32 queues.

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Dineshbabu
Employee
1,183 Views

Hi AndriiV,


Please let us know the outcome once you tried tunings recommended in the attached document.


Regards,

Dinesh


AndriiV
Novice
1,049 Views

Hi, Dinesh! Hi, Azeem!

Yesterday was the day with the highest traffic for the whole week.

I made changes 17.05.2024 at the evening

1. disable irqbalance

 

systemctl disable irqbalance
systemctl stop irqbalance

 

was allready stoped and disabled

2. Set the number of hardware receive (RX) and transmit (TX) queues

 

ethtool -L ens2 combined 40

 

was

 

ethtool -L ens2 combined 80

 

I made 40 queues becase CPU has 40 kernels

3. Set the interrupt moderation and packet coalescing for a network interface

 

ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 100 tx-usecs 100 rx-usecs-high 100

 

was

 

ethtool -C ens2 adaptive-rx off adaptive-tx off rx-usecs 2048 tx-usecs 2048

 

 4. Set the receive (RX) and transmit (TX) ring parameters for a network interface

 

ethtool -G ens2 rx 2048 tx 2048

 

was

 

ethtool -G ens2 tx 4096 rx 4096

 

5. Disable GRO

 

ethtool -K ens2 gro off

 

was

 

ethtool -K ens2 tx on sg on tso on rx on

 

6. Disable auto-negotiation for RX and TX features

 

ethtool -A ens2 rx off tx off

 

already was disabled

7. Set the IRQ Affnity (so IRQ affinity to be local to each CPU)

 

./ set_irq_affinity -x local ens2 

 

was

 

./ set_irq_affinity -x all ens2 

 

8. Set the network socket buffer sizes to max

 

sysctl -w net.core.rmem_max=16777216
sysctl -w net.core.wmem_max=16777216

 

already was in sysctl.conf

9. Set the tuning profile

 

tuned-adm profile network-throughput

 

allready was the same. Also I tried (long time ago)

 

tuned-adm profile throughput-performance

 

10. Disable Firewall

 

service firewalld stop; systemctl mask firewalld

 

There are no firewalld in my system. Iptables has some fail2ban rulles for sshd and pure-ftpd

 

iptables -L -n -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
2787K 7817M f2b-pure-ftpd  tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            multiport dports 21,20,990,989
3299K  381M f2b-sshd   tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            multiport dports 22

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain f2b-sshd (1 references)
 pkts bytes target     prot opt in     out     source               destination
1835K  276M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain f2b-pure-ftpd (1 references)
 pkts bytes target     prot opt in     out     source               destination
2739K 7814M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

 

 

Results

 

 

ethtool -S ens2 | grep dropped | column
     rx_dropped: 10215                       tx_dropped: 0                           port.rx_dropped: 174490                 port.tx_dropped_link_down: 0

 

 I made atop screenshots of both servers  yeasterday at 23:23 GMT+2 and 22:27 GMT+1 (Almost at the same time)

XL710:

atop_4.png

 

4х 82599ES:

atop_5.png

 

As you can see, first server has 21 Gbit/s, the second has 26 Gbit/s

IRQ loading with XL710 from 47% to 79% at the same time IRQ loading at 4x82599ES from 0% to 42%

You might think that the interrupts are due to the disks, but these servers have the same disks.

Graphs as a whole with yesterday's peak (GMT+2):

XL710:

graphs_5.png

4х 82599ES:

graphs_6.png

You may also be interested in Nginx statistics for this time:

XL710:

nginx_1.png

4х 82599ES:

nginx_2.png

 

As you can see, at approximately 21:30 with 15k connections on the xl710 problems begin.

A synthetic test in iperf for 10 connections is of course good, but it is far from real conditions.

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Simon-Intel
Employee
1,034 Views


Hi AndriiV,


Thank you for your prompt response.


We appreciate you sharing your concern with us. Please rest assured that we understand the importance of your situation and are fully committed to assisting you.


Please allow us some time to check this with the internal team, and we will get back to you as soon as we have an update.


If you have any additional information or questions, please feel free to share them with us. We're here to support you every step of the way.


Best regards,

Simon


AndriiV
Novice
930 Views

Hello!

If it helps in any way. We are using optical twinax cable:

# ethtool -m ens2
        Identifier                                : 0x0d (QSFP+)
        Extended identifier                       : 0x10
        Extended identifier description           : 1.5W max. Power consumption
        Extended identifier description           : No CDR in TX, No CDR in RX
        Extended identifier description           : High Power Class (> 3.5 W) not enabled
        Connector                                 : 0x23 (No separable connector)
        Transceiver codes                         : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
        Encoding                                  : 0x05 (64B/66B)
        BR, Nominal                               : 10300Mbps
        Rate identifier                           : 0x00
        Length (SMF,km)                           : 0km
        Length (OM3 50um)                         : 0m
        Length (OM2 50um)                         : 0m
        Length (OM1 62.5um)                       : 0m
        Length (Copper or Active cable)           : 3m
        Transmitter technology                    : 0x00 (850 nm VCSEL)
        Laser wavelength                          : 0.000nm
        Laser wavelength tolerance                : 0.000nm
        Vendor name                               : CISCO-FINISAR
        Vendor OUI                                : 00:90:65
        Vendor PN                                 : FCBN410QE2C03-C2
        Vendor rev                                : A
        Vendor SN                                 : FIW231301GE-B
        Date code                                 : 190326
        Revision Compliance                       : Revision not specified
        Module temperature                        : 0.00 degrees C / 32.00 degrees F
        Module voltage                            : 0.0000 V

 

On other side is Juniper QFX5200-32C 

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Azeem_Intel
Employee
899 Views

Hi AndriiV,


Greetings for the day!

 

You observed the problem in the setup with the "Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz" but not in the setup with the "Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz".

 

Since we did not have both processors available, we tested with an Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz and were unable to reproduce the issue.

 

Here is the small comparison b/w your setups:

 

Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz: It is a part of the Skylake microarchitecture. It has 20 cores and 40 threads, a clock speed of 2.10 GHz, a cache of 27.5 MB, and a TDP (termal design power) of 125 watts.

 

Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz: It is based on Broadwell microarchitecture. It has 22 cores and 44 threads, a clock speed of 2.20 GHz, a cache of 55 MB, and a TDP of 145 watts.

 

Conclusion : Despite the Xeon E5-2699 v4 having slightly higher speed and cache, the Xeon Gold 6230 might still perform well or even better in certain tasks due to its architectural improvements.

 

Please clarify the below question:

 

Is this the same pattern used for network traffic, where one setup has four 10-gigabit ports and the other has a 40-gigabit NIC (XL710) Did you initiate traffic on every port simultaneously in the 10-gigabit setup

 

Some tunings: Please try using these

 

   # Disable IRQ Balance

       systemctl stop irqbalance

 

   # Set IRQ Affinity

   ${pathtoi40epackage}/scripts/set_irq_affinity -X local <interface>

   Note: “-x all” to use all the cores,”-x local” to use only the local NUMA socket

 

   # Increase the maximum number of packets allowed to queue when a particular interface receives packets faster than the kernel can process them

     sysctl -w net.core.netdev_max_backlog=8192

 

   # Enable interrupt coalescing to aggregate and process multiple interrupts as a single event, reducing CPU overhead

     ethtool -C $NIC_INTERFACE adaptive-rx off adaptive-tx off rx-usecs 50 tx-usecs 50 rx-usecs-high 50

 

   # Enable Multi-Queue support on NIC, to distribute network traffic processing to across multiple CPU cores.

     ethtool -L ethX combined Y   (ex: ethtool -L ethX combined 32  this is to set 32 Tx/Rx queues)

 

   # set max Tx/RX buffer size

   sysctl -w net.core.rmem_max=16777216

   sysctl -w net.core.wmem_max=16777216

 

   #Set the tuning profile

   tuned-adm profile network-throughput

 

   #Disable Firewall

   service firewalld stop; systemctl mask firewalld

 

# Set the receive (RX) and transmit (TX) ring parameters for a network interface (These parameters are to optimize the buffer space allocated for handling incoming and outgoing network packets)

     ethtool -G $NIC_INTERFACE rx 2048 tx 2048

 

 


Best Regards,

Azeem_Intel


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AndriiV
Novice
596 Views

Hi Azeem, hi Simon!


Is this the same pattern used for network traffic, where one setup has four 10-gigabit ports and the other has a 40-gigabit NIC (XL710) Did you initiate traffic on every port simultaneously in the 10-gigabit setup


As you can see in my second message in this topic, there are Linux software bonding

cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer3+4 (1)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200

802.3ad info
LACP rate: fast
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535

The atop screenshot shows that the traffic is divided evenly between all 4 ports.

Actually, that’s why they installed the second server with 10G network cards, because there were problems with 40G.

 


   # Disable IRQ Balance

       systemctl stop irqbalance


Alredy Stopped

 

  # Set IRQ Affinity

   ${pathtoi40epackage}/scripts/set_irq_affinity -X local <interface>

   Note: “-x all” to use all the cores,”-x local” to use only the local NUMA socket


Made it. Was  set_irq_affinity -x all ens2


   # Increase the maximum number of packets allowed to queue when a particular interface receives packets faster than the kernel can process them

     sysctl -w net.core.netdev_max_backlog=8192


Made it. Was  net.core.netdev_max_backlog = 300000


   # Enable interrupt coalescing to aggregate and process multiple interrupts as a single event, reducing CPU overhead

     ethtool -C $NIC_INTERFACE adaptive-rx off adaptive-tx off rx-usecs 50 tx-usecs 50 rx-usecs-high 50


Made it


   # Enable Multi-Queue support on NIC, to distribute network traffic processing to across multiple CPU cores.

     ethtool -L ethX combined Y   (ex: ethtool -L ethX combined 32  this is to set 32 Tx/Rx queues)


Made it before set_irq_affinity -x loacal ens2 I think it's better this way.


   # set max Tx/RX buffer size

   sysctl -w net.core.rmem_max=16777216

   sysctl -w net.core.wmem_max=16777216


Alredy was the same. I did it again just in case

 


   #Set the tuning profile

   tuned-adm profile network-throughput


Alredy was the same. I did it again just in case

   #Disable Firewall

   service firewalld stop; systemctl mask firewalld


# service firewalld stop; systemctl mask firewalld
Failed to stop firewalld.service: Unit firewalld.service not loaded.
Unit firewalld.service does not exist, proceeding anyway.
Created symlink /etc/systemd/system/firewalld.service → /dev/null.

 


# Set the receive (RX) and transmit (TX) ring parameters for a network interface (These parameters are to optimize the buffer space allocated for handling incoming and outgoing network packets)

     ethtool -G $NIC_INTERFACE rx 2048 tx 2048


Made it.

Now the picture is like this

atop_6.png
 

There are still a lot of IRQ compared to 10G network cards.

Peak day is still Sunday. On weekdays, traffic rarely exceeds 22 Gbps

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AndriiV
Novice
287 Views

Hi Azeem! Yesterday was highest traffic of the week. Graphs below (after tunnings):

graphs_8.png
atop_7.png

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Simon-Intel
Employee
697 Views

Hello AndriiV,

 

Thank you for choosing Intel.

 

This is the first follow-up regarding the issue you reported to us.

 

We wanted to inquire whether you had the opportunity to review the plan of action (POA) we provided. 

 

Feel free to reply to this message, and we'll be more than happy to assist you further.

 

Regards,

Simon


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Simon-Intel
Employee
614 Views

Hello AndriiV,


Thank you for contacting Intel.


This is a follow-up regarding the issue you reported. We are committed to ensuring a swift resolution and would appreciate any updates or additional information you can provide.


Please respond to this message at your earliest convenience. If we do not receive any correspondence from you by tomorrow, we will need to close this case.


We look forward to your reply.


Best regards,

Simon


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