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e9a023f2b7
Currently, when the CPU is doing suspend to ram, we don't save pmu counter register and its content will be lost. To ensure perf profiling is not affected by suspend to ram, this patch is based on arm_pmu CPU_PM notifier and implements riscv pmu pm notifier. In the pm notifier, we stop the counter and update the counter value before suspend and start the counter after resume. Signed-off-by: Eric Lin <eric.lin@sifive.com> Link: https://lore.kernel.org/r/20220705091920.27432-1-eric.lin@sifive.com Signed-off-by: Will Deacon <will@kernel.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 Restructured Text 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.