I've got a Supermicro 1114S-WTRT and I've put in an AMD EPYC 7232P.
Everything seems fine, except when I switch virtual terminals using for example Alt-F1 and Alt-F2 - the system seems to think hard (with lots of interrupts) for a few seconds.
If I have a login screen on VT1 (or just a prompt) and then switch to VT2 (where I have top running, showing system processes) in top I see these two processes:
intr 199.93%
usb 199.77%
The CPU line on top shows something like:
CPU: 0.0% user, 0.0% nice, 12.9% system, 12.9% interrupt, 74.2% idle
If I wait a few seconds, the interrupts drop down to 0 and it's responsive.
There's nothing else running on the machine - it's a base install.
Typing away normally seems fine e.g. if I call up top and press ? repeatedly to toggle between the main display and the help page - fine.
As soon as I switch the VTs - it takes two or three seconds to switch between them as it processes a huge number of interrupts.
Both processes running on CPU 12 (if that makes a difference). The CPU is
CPU: AMD EPYC 7232P 8-Core Processor (3100.06-MHz K8-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs
FreeBSD/SMP: 1 package(s) x 4 cache groups x 2 core(s) x 2 hardware threads
This isn't meant as a proper bug report or anything - just an initial "anybody else seen something like this?" and "got any ideas what I can try and tweak to fix?" I'll have a wander through the BIOS settings but might take a while to do that, so if anyone has seen this before and knows how to fix it, please let me know.
Everything seems fine, except when I switch virtual terminals using for example Alt-F1 and Alt-F2 - the system seems to think hard (with lots of interrupts) for a few seconds.
If I have a login screen on VT1 (or just a prompt) and then switch to VT2 (where I have top running, showing system processes) in top I see these two processes:
intr 199.93%
usb 199.77%
The CPU line on top shows something like:
CPU: 0.0% user, 0.0% nice, 12.9% system, 12.9% interrupt, 74.2% idle
If I wait a few seconds, the interrupts drop down to 0 and it's responsive.
There's nothing else running on the machine - it's a base install.
Typing away normally seems fine e.g. if I call up top and press ? repeatedly to toggle between the main display and the help page - fine.
As soon as I switch the VTs - it takes two or three seconds to switch between them as it processes a huge number of interrupts.
Both processes running on CPU 12 (if that makes a difference). The CPU is
CPU: AMD EPYC 7232P 8-Core Processor (3100.06-MHz K8-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs
FreeBSD/SMP: 1 package(s) x 4 cache groups x 2 core(s) x 2 hardware threads
This isn't meant as a proper bug report or anything - just an initial "anybody else seen something like this?" and "got any ideas what I can try and tweak to fix?" I'll have a wander through the BIOS settings but might take a while to do that, so if anyone has seen this before and knows how to fix it, please let me know.