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Dhananjay Ugwekar
b4943b8bfc
Add a new "power_core" PMU and "energy-core" event for monitoring energy consumption by each individual core. The existing energy-cores event aggregates the energy consumption of CPU cores at the package level. This new event aligns with the AMD's per-core energy counters. Tested the package level and core level PMU counters with workloads pinned to different CPUs. Results with workload pinned to CPU 4 in core 4 on an AMD Zen4 Genoa machine: $ sudo perf stat --per-core -e power_core/energy-core/ -- taskset -c 4 stress-ng --matrix 1 --timeout 5s stress-ng: info: [21250] setting to a 5 second run per stressor stress-ng: info: [21250] dispatching hogs: 1 matrix stress-ng: info: [21250] successful run completed in 5.00s Performance counter stats for 'system wide': S0-D0-C0 1 0.00 Joules power_core/energy-core/ S0-D0-C1 1 0.00 Joules power_core/energy-core/ S0-D0-C2 1 0.00 Joules power_core/energy-core/ S0-D0-C3 1 0.00 Joules power_core/energy-core/ S0-D0-C4 1 8.43 Joules power_core/energy-core/ S0-D0-C5 1 0.00 Joules power_core/energy-core/ S0-D0-C6 1 0.00 Joules power_core/energy-core/ S0-D0-C7 1 0.00 Joules power_core/energy-core/ S0-D1-C8 1 0.00 Joules power_core/energy-core/ S0-D1-C9 1 0.00 Joules power_core/energy-core/ S0-D1-C10 1 0.00 Joules power_core/energy-core/ Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: "Gautham R. Shenoy" <gautham.shenoy@amd.com> Link: https://lore.kernel.org/r/20241115060805.447565-11-Dhananjay.Ugwekar@amd.com
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.