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ffdbd3d835
This patch is to add the general hardware last level cache (LLC) events for PMUv3: one event is for LLC access and another is for LLC miss. With this change, perf tool can support last level cache profiling, below is an example to demonstrate the usage on Arm64: $ perf stat -e LLC-load-misses -e LLC-loads -- \ perf bench mem memcpy -s 1024MB -l 100 -f default [...] Performance counter stats for 'perf bench mem memcpy -s 1024MB -l 100 -f default': 35,534,262 LLC-load-misses # 2.16% of all LL-cache hits 1,643,946,443 LLC-loads [...] Signed-off-by: Leo Yan <leo.yan@linaro.org> Link: https://lore.kernel.org/r/20200811053505.21223-1-leo.yan@linaro.org Signed-off-by: Will Deacon <will@kernel.org> |
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kernel | ||
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README |
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.