23.01 Seems to ignore changes to TX/RX descriptors?

rdsmith24

I'm trying to increase the number for TX/RX descriptors for an Intel i350 NIC card using the following in /boot/loader.conf

hw.igb.rxd="2048"
hw.igb.txd="2048"

or

dev.igb.rxd="2048"
dev.igb.txd="2048"

Neither seems to be acknowledged.....output of grep igb0 /var/run/dmesg.boot after a reboot still indicates that only 1024 are allocated.

Previously on 22.01, I could place this in loader.conf.local and it worked perfectly. I've tried the previous in /boot/loader.conf and /boot/loader.conf.local.

I'm sure I'm missing something new in Freebsd 14 but hoping that someone has already run across this.

Thanks

tman222

Hi @rdsmith24 -

This tunable has changed with with the introduction of iflib in FreeBSD:

https://man.freebsd.org/cgi/man.cgi?query=iflib&apropos=0&sektion=4&manpath=FreeBSD+14.0-CURRENT&arch=default&format=html

You'll want to modify override_nrxds and override_ntxds for your igb interface(s).

Hope this helps.

rdsmith24

@tman222 Thanks for the information. Was able to make the tuning changes just fine now.

SteveITS

@rdsmith24 also, use /boot/loader.conf.local as /boot/loader.conf gets overwritten.