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857a61c2ce
The previous approach introduced roundoff errors during division when calculating the boost ratio. This, in turn, affected the maximum frequency calculation, often resulting in reporting lower frequency values. For example, on the Glinda SoC based board with the following parameters: max_perf = 208 nominal_perf = 100 nominal_freq = 2600 MHz The Linux kernel previously calculated the frequency as: freq = ((max_perf * 1024 / nominal_perf) * nominal_freq) / 1024 freq = 5405 MHz // Integer arithmetic. With the updated formula: freq = (max_perf * nominal_freq) / nominal_perf freq = 5408 MHz This change ensures more accurate frequency calculations by eliminating unnecessary shifts and divisions, thereby improving precision. Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com> [ML: trim the changelog from commit message] Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://lore.kernel.org/r/20241219201833.2750998-1-naresh.solanki@9elements.com Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> |
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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.