@Colin - my understanding is that we have not been able to reproduce on
any of our machines either.
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Title:
Breaks frequency scaling in Xeon® E5-
** Summary changed:
- Breaks frequency scaling in Xeon® E5-2687W v3
+ Breaks frequency scaling in Xeon® E5-2687W v3 & E5-1650 v3
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Title:
Breaks
@Kristen, I've tried to reproduce this with a couple of Xeons that I
have access too (E3- v3) and not been able to reproduce this yet.
Any luck with tracking down any reproducers in your labs?
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I couldn't figure out which file to compare with. Perhaps the
microcode.dat that is included in the intel-microcode is split up or
something?
So, does it look like the microcode update itself introduces an issue?
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Bugs, whic
seems reasonable enough.
driver is requesting 1.2GHz - so confirms not related to the OS at all.
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Title:
Breaks frequency scaling in Xeon® E5-26
Regarding the last paranoid check of installing the microcode directly
from Intel's site,
I read the instructions and I would like to ask whether I can skip that
and just make sure by md5sum.
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@kristen-c-accardi,
With updated microcode:
➜ ~ git:(master) ✗ sudo turbostat --msr 0x199
[sudo] password for shahar:
CPU Avg_MHz %Busy Bzy_MHz TSC_MHz MSR 0x199
- 163.77 4273096 0x
0 306.99 4263101 0x0c00
10 1
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
@kristen-c-accardi, here are the two turbostat --debug outputs,
attached.
** Attachment added: "turbostat-debug-new-microcode"
https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1480349/+attachment/4440664/+files/turbostat-debug-new-microcode
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** Attachment added: "turbostat-debug-old-microcode"
https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1480349/+attachment/4440663/+files/turbostat-debug-old-microcode
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ht
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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With intel-microcode booted into, I have the same scaling driver.
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Title:
Breaks frequency scaling in Xeon® E5-2687W v3
To manage notifications
Without intel-microcode, I have:
➜ ~ git:(master) ✗ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
intel_pstate
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Title:
Breaks frequen
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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Title:
Breaks frequency
With intel-microcode installed (issue present):
➜ ~ git:(master) ✗ cat /proc/cpuinfo| grep microcode
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode : 0x29
microcode
Working (intel-microcode not installed):
➜ ~ git:(master) ✗ cat /proc/cpuinfo| grep microcode
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x27
microcode : 0x
please show the output of this command on the failing config:
cat /proc/cpuinfo |grep microcode
If you can disable the update and show the output on the working config,
and also the BIOS version, that would also be helpful.
also, so you see the same behaviour when you are running intel_pstate
as
Thank you for looking into this, Colin.
If I have your attention, I'd like to know whether you have a plan for
#911206, if you don't mind sharing there.
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Bug #911206, that is.
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Title:
Breaks frequency scaling in Xeon® E5-2687W v3
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** Changed in: intel-microcode (Ubuntu)
Status: Confirmed => In Progress
** Changed in: intel-microcode (Ubuntu)
Importance: Undecided => High
** Changed in: intel-microcode (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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I can confirm the exact same thing here.
Kubuntu 15.04
intel-microcode 3.20150121.1
CPU Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz
When intel-microcode is installed the CPU frequencies are stuck between
400 and 500 Mhz, they just slightly scale between this two values. No
special messages in dmesg
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: intel-microcode (Ubuntu)
Status: New => Confirmed
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Tit
It is also probably important to add:
With the intel-microcode package installed the cpu scales to much, much
lower than without.
Without is minimum 1.2GHz and with can be as low as around 400MHz.
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@colin-king, thank you for giving this attention.
`$ sudo systemctl stop thermald` doesn't seem to change it.
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Title:
Breaks frequency scaling i
I wonder if it is something like thermald being over-zealous.
Can you try:
sudo systemctl stop thermald
and see if that changes the behaviour
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** Description changed:
When I boot with this installed frequency scaling is no longer behaving
as expected.
It seems that with this installed, the OS loses control of the scaling.
It seems that scaling is performed, though. And very much to the purpose
of power saving.
Perfor
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