@Kai-Heng Feng, the fix is not showing up in 4.4.0-72
carl@carl-5520:~$ uname -a
Linux carl-5520 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
carl@carl-5520:~$ sudo powertop
Package | Core | CPU 0 CPU 4
POLL 0.0% | POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
C1 2.7% | C1 2.2% | C1 4.3% 1.3 ms 0.1%
0.3 ms
C2 7.3% | C2 7.3% | C2 7.0% 1.6 ms 7.7%
4.1 ms
C3 87.9% | C3 88.4% | C3 85.2% 14.8 ms 91.5%
23.1 ms
| Core | CPU 1 CPU 5
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 2.6% | C1 0.0% 0.1 ms 5.2%
1.2 ms
| C2 4.4% | C2 2.8% 1.9 ms 6.1%
1.1 ms
| C3 91.3% | C3 96.0% 10.2 ms 86.6%
7.4 m
| Core | CPU 2 CPU 6
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 5.1% | C1 8.8% 0.7 ms 1.4%
1.1 ms
| C2 8.4% | C2 14.7% 2.5 ms 2.1%
1.5 ms
| C3 84.6% | C3 73.7% 6.9 ms 95.4%
10.6 ms
| Core | CPU 3 CPU 7
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 0.9% | C1 0.5% 0.2 ms 1.3%
3.3 ms
| C2 8.9% | C2 13.6% 1.6 ms 4.2%
2.5 ms
| C3 87.1% | C3 80.3% 6.8 ms 93.9%
10.8 ms
carl@carl-5520:~$ sudo i7z
Cpu speed from cpuinfo 2902.00Mhz
cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating
via tsc
Linux's inbuilt cpu_khz code emulated now
True Frequency (without accounting Turbo) 2902 MHz
CPU Multiplier 29x || Bus clock frequency (BCLK) 100.07 MHz
Socket [0] - [physical cores=4, logical cores=8, max online cores ever=4]
TURBO ENABLED on 4 Cores, Hyper Threading ON
Max Frequency without considering Turbo 3002.07 MHz (100.07 x [30])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 39x/37x/36x/35x
Real Current Frequency 1395.28 MHz [100.07 x 13.94] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 %
Temp VCore
Core 1 [0]: 1351.45 (13.51x) 5.21 97.6 0 0
44 0.8995
Core 2 [1]: 1395.28 (13.94x) 1.37 99.3 0 0
43 0.8981
Core 3 [2]: 1310.44 (13.10x) 2.49 98.9 0 0
44 0.8981
Core 4 [3]: 1328.40 (13.27x) 1 99.6 0 0
44 0.8954
C0 = Processor running without halting
C1 = Processor running with halts (States >C0 are power saver modes with cores
idling)
C3 = Cores running with PLL turned off and core cache turned off
C6, C7 = Everything in C3 + core state saved to last level cache, C7 is deeper
than C6
Above values in table are in percentage over the last 1 sec
[core-id] refers to core-id number in /proc/cpuinfo
'Garbage Values' message printed when garbage values are read
Ctrl+C to exit
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1672439
Title:
No C-State Deeper than C3 utilized by Kaby Lake 7820HQ in Precision
5520
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Xenial:
Fix Committed
Bug description:
My processor does not appear to be utilizing and idling states deeper
than C3.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-66-generic 4.4.0-66.87
ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
Uname: Linux 4.4.0-66-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: carl 2446 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Mar 13 08:57:06 2017
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-xenial-amd64-20160624-2
HibernationDevice: RESUME=UUID=65474558-ead3-4d66-85e5-b55f81978b88
InstallationDate: Installed on 2017-03-09 (3 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary
20160624-10:47
IwConfig:
lo no wireless extensions.
wlp2s0 no wireless extensions.
MachineType: Dell Inc. Precision 5520
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic.efi.signed
root=UUID=d19efcb8-515b-494c-a236-ee0da23f2393 ro acpi_rev_override locale=C
quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-66-generic N/A
linux-backports-modules-4.4.0-66-generic N/A
linux-firmware 1.157.8
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/18/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.3
dmi.board.name: 0X41RR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.1.3:bd01/18/2017:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn0X41RR:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.name: Precision 5520
dmi.sys.vendor: Dell Inc.
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