Hardware tuning

Antibiotic

Hello,
pfsense turning have a tip for igb cards: kern.ipc.nmbclusters="1000000"
Will this work for igc cards or any other tweaks for this cards?

stephenw10

You almost certainly don't need 1M nmbclusters. The automatically defined value is almost always correct.

The same goes the igc tunables. We upstreamed a few changes to the defaults, what is set there now should be good.

Steve

Antibiotic

@stephenw10 Oki

tomashk

@stephenw10 by "now" you mean latest plus version of pfsense? If yes, is it different when compared to latest CE version? I wonder what changed especially if there is something I can apply to my 2.7.2

stephenw10

Check the max interrupt rate:

[24.03-RELEASE][admin@4200.stevew.lan]/root: sysctl hw.igc
hw.igc.max_interrupt_rate: 20000
hw.igc.eee_setting: 1
hw.igc.sbp: 1
hw.igc.smart_pwr_down: 0
hw.igc.rx_abs_int_delay: 66
hw.igc.tx_abs_int_delay: 66
hw.igc.rx_int_delay: 0
hw.igc.tx_int_delay: 66
hw.igc.disable_crc_stripping: 0

tomashk

@stephenw10 Thank you. Apparently I have the same values, or maybe for my I225-V I have one more than your list:

hw.igc.rx_process_limit: 100

Antibiotic

@tomashk said in Hardware tuning:

hw.igc.rx_process_limit: 100

What the benefit from this?
Are you put this in boot,conf or system tunable?

Antibiotic

@stephenw multi queue support for this NIC? in default settings or can add:

hw.igc.rx_process_limit="-1"
hw.igc.tx_process_limit="-1"

stephenw10

It defaults to 100. Yes it's multiqueue.

       hw.igc.rx_process_limit
	       Maximum	number	of received packets to process at a time.  De-
	       fault is	100.  A	value of -1 means unlimited.

Unlikely you will see any advantage to setting that over 100 IMO. But you can try it.

Antibiotic

@stephenw10 Yea, i think you reply to other guy)))
In my settings pfSense 24.03, do not have this option: hw.igc.rx_process_limit

sysctl hw.igc
hw.igc.max_interrupt_rate: 20000
hw.igc.eee_setting: 1
hw.igc.sbp: 1
hw.igc.smart_pwr_down: 0
hw.igc.rx_abs_int_delay: 66
hw.igc.tx_abs_int_delay: 66
hw.igc.rx_int_delay: 0
hw.igc.tx_int_delay: 66
hw.igc.disable_crc_stripping: 0

stephenw10

Yes because it defaults to 100. You asked about setting it to -1 which is unlimited I don't think that will make any difference as 100 is sufficient. But it's also unlikely to cause a problem so you can try it.

Antibiotic

@stephenw10 I mean in my settings 100 is absent at all

tomashk

@Antibiotic said in Hardware tuning:

@tomashk said in Hardware tuning:

hw.igc.rx_process_limit: 100

What the benefit from this?
Are you put this in boot,conf or system tunable?

I haven't set it. It was there by default. I mentioned it because it wasn't present in listing provided by @stephenw10

stephenw10

Right because it now is the default so you don't need to set it. You can try setting it to something different as a test if you want but I don't believe it will make any difference.