Command to test NIC performance/settings

jsmiddleton4

I'm trying to find the commands I can run via Command tab to check if my tweaks are actually being written, status of the NIC's, etc.

Seems like a simple thing, a list of commands one can enter for diagnostics.

Dang me if I can find it. I've found everything else including if I want to, how to compile my own versions of stuff.

Feel like I'm trying to get a sip of water out of a fire hydrant.

Is there a list somewhere that shows me the commands I can use to see the status of my NIC's?

johnpoz

@jsmiddleton4 said in Command to test NIC performance/settings:

status of my NIC's?

Like what exactly?

ifconfig would give you a bunch of info

igb2: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: WLAN
        options=e120bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:08:a2:0c:e6:20
        inet6 fe80::208:a2ff:fe0c:e620%igb2 prefixlen 64 scopeid 0x3
        inet 192.168.2.253 netmask 0xffffff00 broadcast 192.168.2.255
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

pciconf -lv

Would give you info about the actual nic

igb2@pci0:0:20:0:       class=0x020000 card=0x1f418086 chip=0x1f418086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Connection I354'
    class      = network
    subclass   = ethernet

What sort of specific info are you looking for?

jsmiddleton4

@johnpoz

Thanks. Those kinds of things but also to see if my tweak for increasing tx/rx buffer size took.

johnpoz

@jsmiddleton4

Hum on the buffer, I have not played with that sort of stuff in years. But I do believe you can set a debug or something with sysctl and then viewing the log to make sure they were set, etc.

The hardware guru around here would be @stephenw10 - lets see if he notices my flag to him and then chimes in.. If I had such a question, he would be first person I would think of to know the answer.

jsmiddleton4

@johnpoz

Yes. He's been incredibly helpful.

stephenw10

Yeah, everything else that can be read should be in the sysctl output.

jsmiddleton4

@stephenw10

So just run it all by itself? Any parameters?

I found some information in Syslog under OS.

I'm searching now for what this means:

igc0: Using 4 RX queues 4 TX queues
igc0: Using 1024 TX descriptors and 1024 RX descriptors

stephenw10

You can just parse the full output but I'd expect to see everything for that NIC from: sysctl dev.igc.0

jsmiddleton4

@stephenw10

I think its the parameters I'm looking for more than the command. Thanks.

I appreciate highly the Intel 2.5gbe driver being part of 2.5.2. Someone left it named as if the Intel 1gb card though. Funny......

Lots of numbers and parameter names. Nothing I could look at and say "There's my rx/tx buffer tweak from loader.conf.local" though.

dmesg | grep igc0

netmap queues/slots: TX 4/1024, RX 4/1024

I set the buffers to 4096 in loader.conf.local. Is this telling me its still 1024 or is this telling me 4x1024? Or is this not relevant and I need to stop doing this and watch Jerry Springer?

johnpoz

@jsmiddleton4 what exactly did you set?

you should be able to view what that is directly with sysctl whatever that is..