Date: Fri, 4 Aug 2017 18:59:05 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: mlx4en, timer irq @100%... Message-ID: <BF3A3E47-A726-49FB-B83F-666EFC5C0FF1@gmail.com>
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Hello,
Not sure this is the right list, but as it seems related to a mlx4en device...
# vmstat -i 1
(...)
interrupt total rate
cpu23:timer 1198 1127
# top -P ALL
(...)
CPU 23: 0.0% user, 0.0% nice, 0.0% system, 100% interrupt, 0.0% idle
# netstat -I mlxen0 -d -w 1
input mlxen0 output
packets errs idrops bytes packets errs bytes colls drops
(and not output at all, same for mlxen1 !)
# uname -sr
FreeBSD 11.0-RELEASE-p9
So, as you can see, one of my CPUs is used at 100% by timer interrupts,
since about 2 hours, and suddenly.
Initiating network connections to this server is now slow.
And what I found is that I can't use netstat on my 2 mlx4en devices anymore
(my monitoring tool is then no more fed).
sysctl hw.mlxen0 is OK, no errors, and trafic counters grow slowly.
What should I do ?
How to investigate on this ?
Thank you very much for your help & support,
Best regards,
Ben
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