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When SNC mode is enabled, create subdirectories and files to monitor at the SNC node granularity. Legacy behavior is preserved by tagging the monitor files at the L3 granularity with the "sum" attribute. When the user reads these files the kernel will read monitor data from all SNC nodes that share the same L3 cache instance and return the aggregated value to the user. Note that the "domid" field for files that must sum across SNC domains has the L3 cache instance id, while non-summing files use the domain id. The "sum" files do not need to make a call to mon_event_read() to initialize the MBM counters. This will be handled by initializing the individual SNC nodes that share the L3. Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Tested-by: Babu Moger <babu.moger@amd.com> Link: https://lore.kernel.org/r/20240628215619.76401-14-tony.luck@intel.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.