[OmniOS-discuss] rge_intr troubles

[Saso Kiselkov]

So I'm playing around with a box that has an on-board Realtek NIC and
periodically, about once every 2-5 minutes, the network just goes out to
lunch and stops responding to ping or attempts to send anything from
the box. I noticed that while doing so, the box is getting floored by
interrupts from the NIC, so I see tons of rge_intr activity and one CPU
core receiving about 160000 interrupts per second (other cores are idle).

I've tried a number of things I've found on the internet, but to no
avail. I tried setting msi_enable=0 and msix_enable=0 in
/kernel/drv/rge.conf, but that didn't help. Disabling flow control via

# ndd -set /dev/rge0 adv_pause_cap 0
# ndd -set /dev/rge0 adv_asym_pause_cap 0

didn't help either. I tried OmniOS r151018, OpenIndiana hipster
(2016.04) and even the old OpenIndiana 151a8 (all 64-bit).

Not being a driver person myself, I have no idea where to look next.
I've attached prtconf -v and lspci -vvvxx output for PCI IDs and config
info. Also attached are screenshots of mpstat and dtrace profile at
997hz running on the CPU that's bogged down with interrupts.

-- 
Saso
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