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2022-06-06 20:37:46 +02:00 · 2022-06-06 20:37:46 +02:00 · 3c13871f6c
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+---
+title: 'Overclocking in Linux'
+---
+
+[toc]
+## Overclocking
+### CPU
+*TODO* I have not yet checked for system-tools for overclocking  
+
+### GPU
+#### AMD
+[CoreCtrl](https://gitlab.com/corectrl/corectrl) allows the manipulation of GPU frequency, voltages, power and the fancurve.  
+
+*TODO* installation hints  
+
+### RAM
+*I'm unaware of any platform supporting online-editing of RAM timings*  
+
+## Monitoring
+### Sensors
+The `lm_sensors` package shows temperatures, fan pwm and other sensors for your CPU, GPU and motherboard.  
+Run `$ sensors` to get the output.  
+
+#### Support for motherboard ITE LPC chips
+Support for this type of chip does not come built in to `lm_sensors`.  
+In the AUR the package `it87-dkms-git` provides a kernel module with support for a variety of ITE chips. It pulls from [this](https://github.com/frankcrawford/it87) git repo. You can find a list of supported chips there. See [this issue on lm_sensors git repo](https://github.com/lm-sensors/lm-sensors/issues/134) for background info.  
+
+The kernel driver can be automatically loaded on boot by putting `it87` into `/etc/modules-load.d/(filename).conf`  
+The option `acpi_enforce_resources=lax` also needs to be added to `GRUB_CMDLINE_LINUX_DEFAULT` in `/etc/default/grub` or your bootloader equivalent.  
+
+### CoreFreq
+[CoreFreq](https://github.com/cyring/CoreFreq) can display a lot of information about the CPU and the memory controller.  
+
+To run, the systemd service `corefreqd` needs to be enabled.  
+CoreFreq also depends on a kernel driver. Simply put `corefreqk` into `/etc/modules-load.d/(filename).conf` to load it automatically on boot.
+
+Access the TUI using `$ corefreq-cli`  
+
+A few interesting views:  
+`Shift + C` shows per thread frequency, voltage and power, as well as overall power and temperature.  
+`Shift + M` shows the memory timings, frequency and DIMM layout.  
+
+### CoreCtrl
+CoreCtrl displays a range of information for AMD GPUs.  
+
+### Error monitoring
+Some applications have hardware error reporting built-in.  
+#### Kernel log
+For others, try checking the kernel log.  
+`$ journalctl -k --grep=mce`  
+
+#### Rasdaemon
+You can also install `aur/rasdaemon` and enable its two services.  
+`# systemctl enable --now ras-mc-ctl.service`  
+`# systemctl enable --now rasdaemon.service`  
+
+`$ ras-mc-ctl --summary` shows all historic errors  
+`$ ras-mc-ctl --error-count` shows memory errors of the current session  
+
+## Testing
+> [More Testing Tools can be found on the ArchWiki](https://wiki.archlinux.org/title/Stress_testing?useskinversion=1)  
+
+### CPU
+#### Prime95/Mprime
+`$ mprime`  
+Select "No" when asked to join the distributed computing project  
+`16` for torture testing  
+Recommended test: `2`  
+
+This application includes hardware error checking. Output to the CLI as well as the logfile.  
+Check the file `results.txt`  
+
+#### ffmpeg video encoding
+This command encodes random noise with x265 and discards the resulting video  
+`$ ffmpeg -y -f rawvideo -video_size 1920x1080 -pixel_format yuv420p -framerate 60 -i /dev/urandom -c:v libx265 -preset placebo -f matroska /dev/null`  
+> [ArchWiki Source](https://wiki.archlinux.org/title/Stress_testing?useskinversion=1#Video_encoding)  
+
+#### Stress
+Stress is capable of testing CPU, memory, I/O and disks  
+Use `$ stress -c (threads)`  to test the CPU  
+
+### GPU
+*TODO*  
+
+### RAM
+#### Stressapptest
+**NOTE**: Produces heavy load on the CPU as well. A stable CPU OC before running this is recommended.  
+`$ stressapptest -M (RAM MiB) -s (time in s) -m (CPU threads)`