Okay. Right away I notice a difference with the program i7z:
Cpu speed from cpuinfo 2875.00Mhz
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) 2895 MHz
CPU Multiplier 29x || Bus clock frequency (BCLK) 99.83 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 2994.83 MHz (99.83 x [30])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 39x/37x/36x/35x
Real Current Frequency 2881.62 MHz [99.83 x 28.87] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 %
Temp VCore
Core 1 [0]: 2865.41 (28.70x) 1.77 96.2 1 1
46 1.0009
Core 2 [1]: 2874.93 (28.80x) 1.74 86.3 1 11
46 0.9927
Core 3 [2]: 2881.62 (28.87x) 1.34 96.1 1 1.55
46 1.0076
Core 4 [3]: 2877.37 (28.82x) 1.4 95 1 2.62
46 1.0226
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
WAY MORE activity in C6 state. Although I don't see any listings for C10
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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:
Incomplete
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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