em performs worse than igb (latency wise) in 12?
Kris von Mach
mach at swishmail.com
Fri Apr 5 19:12:27 UTC 2019
On 4/6/2019 2:56 AM, Pete French wrote:
> Something odd going on there there - I am using 12-STABLE and I have
> igb just fine, and it attaches to the same hardware that 11 did:
It does work in 12, throughput is great, just that the latency is higher
igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
inet 18.104.22.168 netmask 0xfffffc00 broadcast 22.214.171.124
inet6 fe80::3aea:a7ff:fe8d:c16c%igb0 prefixlen 64 scopeid 0x1
inet6 2602:ffb8::208:72:56:9 prefixlen 64
media: Ethernet autoselect (1000baseT <full-duplex>)
> Do you have a custom kernel, and if so did you see this note in UPDATING?
Yes I do, but it includes all of GENERIC which includes em drivers,
otherwise it wouldn't even work with the network card.
my custom kernel:
options AHC_REG_PRETTY_PRINT # Print register bitfields in debug
options AHD_REG_PRETTY_PRINT # Print register bitfields in debug
I did try without RACK just in case that was the culprit.
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