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f89cb9cba7
This patch is also an issue report. get_cpu_topology will always save into cpupower_topology a cores size of 0. The code to handle this looks like it was commented out, and what is commented out is missing a curly bracket. https://elixir.bootlin.com/linux/v6.13.5/source/tools/power/cpupower/lib/cpupower.c#L206-L212 Inspiration was taken from psutil to implement this by querying core_cpu_list. Instead of using a hashmap, I used a sorted array, and counted the number of valid unique strings. The counting of this takes place before the qsort for .pkg as the following code says it is dependent on the order of that sort. The previous code claimed Intel CPUs are not numbered correctly. I was not able to reproduce that issue and removed that comment and the code. This commit was tested with the libcpupower SWIG Python bindings and performed correctly on 4 different setups. The most notable is the Framework Intel laptop; a hybrid system of 4 P cores (8 threads) and 8 E cores (8 threads). The 4 setups: A 4 core virt-manager VM running Fedora 41 4c/4t (specs not listed) was tested as a sanity test for VMs. A Lenovo Ryzen 7 Pro 7840HS 8c/16t. A Supermico Intel(R) Xeon(R) Gold 6330 CPU w/ 56c/112t with 2 CPU sockets. A Framework 12th Gen Intel(R) Core(TM) i5-1240P with hybrid cores. CPU(s): 16 On-line CPU(s) list: 0-15 Vendor ID: AuthenticAMD Model name: AMD Ryzen 7 PRO 7840HS w/ Radeon 780M Graphics CPU family: 25 Model: 116 Thread(s) per core: 2 Core(s) per socket: 8 Socket(s): 1 Stepping: 1 CPU(s): 112 On-line CPU(s) list: 0-111 Vendor ID: GenuineIntel BIOS Vendor ID: Intel(R) Corporation Model name: Intel(R) Xeon(R) Gold 6330 CPU @ 2.00GHz BIOS Model name: Intel(R) Xeon(R) Gold 6330 CPU @ 2.00GHz CPU @ 2.0GHz BIOS CPU family: 179 CPU family: 6 Model: 106 Thread(s) per core: 2 Core(s) per socket: 28 Socket(s): 2 Stepping: 6 CPU(s): 16 On-line CPU(s) list: 0-15 Vendor ID: GenuineIntel Model name: 12th Gen Intel(R) Core(TM) i5-1240P CPU family: 6 Model: 154 Thread(s) per core: 2 Core(s) per socket: 12 Socket(s): 1 Stepping: 3 Link: https://lore.kernel.org/r/20250305210901.24177-1-jwyatt@redhat.com Signed-off-by: "John B. Wyatt IV" <jwyatt@redhat.com> Signed-off-by: "John B. Wyatt IV" <sageofredondo@gmail.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.