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82599ES RSS scale to 128 Queue - But only limited to 64

Netswat
Beginner
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Hello Folks ,
im jusing 82599ES as my network card Centos7 .

44:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)



[root@X1 ~]# ethtool -i p1p1
driver: ixgbe
version: 5.13.4
firmware-version: 0x2b2c0001, 1.1853.0
expansion-rom-version:
bus-info: 0000:44:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
[root@X1 ~]# ethtool -l p1p1
Channel parameters for p1p1:
Pre-set maximums:
RX: 0
TX: 0
Other: 1
Combined: 63
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 63



As based above the default OS RSS above seems only 64 but i want to scale it ...


Based on intell sheet ,

it support :
Number of Rx Queues (per port)
128



When i try to scale it :

rmmod ixgbe /*Uninstall the driver of an earlier version*/
modprobe ixgbe RSS=128

i have the error :


[1702691.008661] ixgbe 0000:41:00.0 0000:41:00.0 (uninitialized): Invalid Receive-Side Scaling (RSS) specified (128), using default.



[1702691.008666] ixgbe 0000:41:00.0 0000:41:00.0 (uninitialized): ixgbe_check_options: FCoE Offload feature enabled
[1702691.181371] ixgbe 0000:41:00.0: Multiqueue Enabled: Rx Queue count = 63, Tx Queue count = 63
[1702691.183609] ixgbe 0000:41:00.0: 32.000 Gb/s available PCIe bandwidth, limited by 5 GT/s x8 link at 0000:40:01.0 (capable of 63.008 Gb/s with 8 GT/s x8 link)
[1702691.183935] ixgbe 0000:41:00.0 eth0: MAC: 2, PHY: 15, SFP+: 7, PBA No: G28774-000
[1702691.183937] ixgbe 0000:41:00.0: a0:36:9f:1c:8d:2c
[1702691.183940] ixgbe 0000:41:00.0 eth0: Enabled Features: RxQ: 63 TxQ: 63 FdirHash
[1702691.185620] ixgbe 0000:41:00.0 eth0: Intel(R) 10 Gigabit Network Connection
[1702691.186275] ixgbe 0000:41:00.1 0000:41:00.1 (uninitialized): ixgbe_check_options: FCoE Offload feature enabled
[1702691.186639] ixgbe 0000:41:00.0 p5p1: renamed from eth0




based on sheet i can be 128 but based on OS i can only scale to 64 !

Any help ?

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