linux-toradex.git/Documentation/x86/resctrl.rst, branch v5.16 Linux kernel for Apalis and Colibri modules Documentation/x86: Rename resctrl_ui.rst and add two errata to the file 2020-10-27T15:47:00+00:00 Fenghua Yu fenghua.yu@intel.com 2020-10-14T00:49:26+00:00 d1b22e36e3188f47dbf8aaef54d9e79df8e91f4c Intel Memory Bandwidth Monitoring (MBM) counters may report system memory bandwidth incorrectly on some Intel processors. This is reported in documented in erratum SKX99, erratum BDF102 and in the RDT reference manual, see Documentation/x86/index.rst. To work around the errata, MBM total and local readings are corrected using a correction factor table. Since the correction factor table is not publicly documented anywhere, document the table and the errata in Documentation/x86/resctrl.rst for future reference. [ bp: Move web links to the doc, massage. ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20201014004927.1839452-2-fenghua.yu@intel.com 
Intel Memory Bandwidth Monitoring (MBM) counters may report system
memory bandwidth incorrectly on some Intel processors. This is reported
in documented in erratum SKX99, erratum BDF102 and in the RDT reference
manual, see Documentation/x86/index.rst.

To work around the errata, MBM total and local readings are corrected
using a correction factor table.

Since the correction factor table is not publicly documented anywhere,
document the table and the errata in Documentation/x86/resctrl.rst for
future reference.

 [ bp: Move web links to the doc, massage. ]

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20201014004927.1839452-2-fenghua.yu@intel.com