New: Intel CPU maximum boost frequency reduced after resume from suspend to RAM
https://bugzilla.kernel.org/show_bug.cgi?id=217589
Bug ID: 217589
Summary: Intel CPU maximum boost frequency reduced after resume
from suspend to RAM
Product: Power Management
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: cpufreq
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Hardware: MSI MAG Tomahawk Z790 Wifi motherboard, 7D91vH6 BIOS, with Intel i7-13700K, p-cores overclocked to 5.5GHz, e-cores overclocked to 4.4GHz
Kernel: Linux fedora 6.3.9-200.fc38.x86_64
While running: sysbench cpu run --num-threads=24, then run cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq | sort -rn
Correct output after reboot:
5500054
5500054
5500000
5500000
5500000
5500000
5500000
5500000
5500000
5500000
5499945
5499945
5499945
5499945
5499945
5499945
4400096
4400044
4400017
4400006
4400004
4400002
4400000
4399960
After suspend to RAM and resume, CPU frequencies are at hardware default without overclock:
5399941
5399941
5300057
5300057
5300000
5300000
5300000
5300000
5300000
5300000
5300000
5300000
5300000
5300000
4500000
4499951
4200050
4200038
4200036
4200004
4199991
4199985
4199963
4199897
CPU boost clock should retain overclocked speeds after resume from suspend.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
https://bugzilla.kernel.org/show_bug.cgi?id=217589
Srinivas Pandruvada ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected] | |ntel.com
--- Comment #1 from Srinivas Pandruvada ([email protected]) --- How did you overclock?
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #2 from Brad Jackson ([email protected]) --- The CPU was overclocked by setting the CPU ratio in the BIOS
(https://youtu.be/X26WU900IAQ?t=2632). This is the only way I'm aware of to overclock on Linux. There is no Intel XTU for Linux and I don't know of a way to increase maximum frequency by writing to /sys/devices.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #3 from Srinivas Pandruvada ([email protected]) --- I suggest to dump
rdmsr -a 0x774
before and after suspend to RAM.
They should be same.
The problem is voltage settings done via BIOS. OS doesn't have support to read and restore. That must be done by the BIOS.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #4 from Brad Jackson ([email protected]) --- Output of rdmsr -a 0x774 before suspend:
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
4646
2c2c
2c2c
2c2c
2c2c
2c2c
2c2c
2c2c
2c2c
After resume:
4646
4444
4444
4444
4444
4444
4444
4444
4545
4545
4545
4545
4444
4444
4444
4444
2a2a
2a2a
2a2a
2a2a
2a2a
2a2a
2a2a
2a2a
So this is a BIOS bug to report to MSI?
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #5 from Srinivas Pandruvada ([email protected]) --- Capture one log with:
echo "file intel_pstate.c +p" >/sys/kernel/debug/dynamic_debug/control echo 0 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu1/online
Another with
echo "file intel_pstate.c +p" >/sys/kernel/debug/dynamic_debug/control suspend to RAM and resume
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #6 from Brad Jackson ([email protected]) --- Had to disable secure boot for debug output. First log:
intel_pstate: CPU 1 going offline
smpboot: CPU 1 is now offline
x86: Booting SMP configuration:
smpboot: Booting Node 0 Processor 1 APIC 0x1intel_pstate: CPU 1 going onlineintel_pstate: set_policy cpuinfo.max 5500000 policy->max 5500000intel_pstate: cpu:1 min_policy_perf:11 max_policy_perf:70intel_pstate: cpu:1 global_min:11 global_max:70intel_pstate: cpu:1 max_perf_ratio:70 min_perf_ratio:11
Second log attached below.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #7 from Brad Jackson ([email protected]) --- Created attachment 304475
--> https://bugzilla.kernel.org/attachment.cgi?id=304475&action=edit
pstate debug log
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #8 from Srinivas Pandruvada ([email protected]) --- It is indicating BIOS issue.
Please dump:
rdmsr -a 0x771
before and after suspend to RAM.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #9 from Brad Jackson ([email protected]) --- Before:
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
1112c46
10d1a2c
10d1a2c
10d1a2c
10d1a2c
10d1a2c
10d1a2c
10d1a2c
10d1a2c
After:
10b2c44
10b2c44
10b2c44
10b2c44
10b2c44
10b2c44
10b2c44
10b2c44
10b2c45
10b2c45
10b2c45
10b2c45
10b2c44
10b2c44
10b2c44
10b2c44
1081a2a
1081a2a
1081a2a
1081a2a
1081a2a
1081a2a
1081a2a
1081a2a
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #10 from Srinivas Pandruvada ([email protected]) --- The BIOS didn't restore max after suspend to RAM. So this is not OS issue. Report to MSI.
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[Bug 217589] Intel CPU maximum boost frequency reduced after resume from suspend to RAM
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=217589
--- Comment #11 from Brad Jackson ([email protected]) --- MSI has ignored my support ticket for weeks, but after chatting with a support person, they don't provide support for Linux or seemingly overclocking either. I don't have a convenient way to test Windows on my PC to prove it's a BIOS bug.
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