@Colin - my understanding is that we have not been able to reproduce on
any of our machines either.
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https://bugs.launchpad.net/bugs/1480349
Title:
Breaks frequency scaling in Xeon® E5-
seems reasonable enough.
driver is requesting 1.2GHz - so confirms not related to the OS at all.
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https://bugs.launchpad.net/bugs/1480349
Title:
Breaks frequency scaling in Xeon® E5-26
thanks. Your MSR_CORE_PERF_LIMIT_REASONS seems to indicate that the
pcode is clipping you after the microcode update. But just to be extra
sure it's not a software problem, can you please update the microcode
and do this:
# turbostat --msr 0x199
And paste the output.
One last paranoid check is
would you mind doing an experiment and using turbostat --debug to
collect some info with the old microcode and new microcode.
use a recent version of turbostat :
turbostat --debug
capture output and paste here.
Thanks,
Kristen
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Hi,
Can you do this:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
And paste the driver which is being used.
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https://bugs.launchpad.net/bugs/1480349
Title:
Breaks frequency
