Comments (3)
Thank you for reporting this.
The RAW MSR dump shows worrying things, e.g. the min multiplier is clearly stated as 9, in reg 0x0ce. But as I see the docs, the number there may be MHz*100, not multiplier. What is the idle frequency (at min multiplier), can you test?
By multiplier 6 it would be 1600 MHz, which I see as rather high, but possible.
We definitely don't decode IA32_PERF_STATUS (0x198) properly. The 0x06 0x1e there is undocumented ("model-specific, do not assume anything"), and our comment there is "the high byte seems to be the multiplier, the low byte is 0". This probably looked right on another CPU, but it's not correct. If this decoding can be trusted it, the 0x06 0x1e would mean "600 MHz, 1.18V", so at least the voltage seems correct.
The temperature computation is wrong because MSR_TEMPERATURE_TARGET (0x1a2) is basically empty - the thermal trip temperature is read as 0°C, instead of a reasonable value like 100°C. If it were 100°C, then the computation would be close to correct (37°C or 42°C, depending on whether TCC is 100 or 105°C).
from libcpuid.
According to CPU-Z, minimum CPU multiplier is 6 and maximum CPU multiplier is 9:
MSR_PLATFORM_INFO
is not documented for Intel Core 2 processor family and for Intel Xeon processors based on Intel Core microarchitecture (DisplayFamily 06H, DisplayModel 0FH):
Not sure how to properly detect if this MSR is supported.
This register seems valid starting Intel Core ix CPUs.
I found this for coreboot in get_fsb_tsc()
: they enumerate all display family and models.
In Intel® 64 and IA-32 Architectures Software Developer’s Manual, there is table 35-1 (CPUID Signature Values of DisplayFamily_DisplayModel).
For AMD CPUs, it is easier because display family is increasing generation after generation, unlike Intel; implementing such checks in libcpuid will require some work.
Intel Core 2 CPU family is 16 years old, meaning fewer and fewer people are still using these CPUs nowaday.
I understand all decoded values from MSRs are wrong with your CPU (it is in the name itself: they are model specific), but I do not want to invest time to fix that, sorry.
from libcpuid.
Related Issues (20)
- Missing detection of SHA_NI and RDSEED on AMD HOT 1
- Report TSC multiplier HOT 2
- CMake build script not in 0.5.0 tarball release HOT 1
- conda-forge package HOT 5
- CPU Family/Model is used as Ext.Family/Model HOT 5
- Intel Alder Lake processors are not properly recognized HOT 21
- C:\Program Files (x86)\Embarcadero\Dev-Cpp\TDM-GCC-64\x86_64-w64-mingw32\bin\ld.exe C:\Users\user\AppData\Local\Temp\cc79calV.o:sysinfo.cpp:(.text+0x15a): undefined reference to `cpuid_present' HOT 2
- xmp profile on H670 chipset does not seem to be detected HOT 2
- cpuid_tool.exe v0.6.0 doesn't work on my PC HOT 3
- Library naming inconsistent between Autotools and CMake HOT 2
- v0.6.0 alder lake(hyper thread disabled) core numbers are not correct. HOT 1
- "Segmentation Fault" on Celeron 900 (Core 2) HOT 6
- x86_64 architecture level HOT 4
- cpuid_tool 0.6.2 does not work on osx HOT 3
- Misprint, not enough zeros in the constant HOT 1
- cpuid_get_all_raw_data() leaves CPU affinity set to a single core HOT 3
- Overclock intel CPU HOT 3
- minimum and maximum frequency of AMD cpu HOT 7
- Support Extended CPU Topology for AMD CPU/APU HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from libcpuid.