linux-kernel - [PATCH 0/2] x86/resctrl: Enable user to view and select thread throttling mode

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Date:   Wed,  1 Apr 2020 11:30:46 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     tglx@...utronix.de, fenghua.yu@...el.com, bp@...en8.de,
        tony.luck@...el.com
Cc:     kuo-lang.tseng@...el.com, mingo@...hat.com, babu.moger@....com,
        hpa@...or.com, x86@...nel.org, linux-kernel@...r.kernel.org,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: [PATCH 0/2] x86/resctrl: Enable user to view and select thread throttling mode

The first patch in this series introduces a new resctrl file,
"thread_throttle_mode", on Intel systems that exposes to the
user how per-thread values are allocated to a core. This is added in
support of newer Intel systems that can be configured to allocate
either maximum or minimum throttling of the per-thread CLOS values
to the core.

Details about the feature can be found in the commit description and
in Chapter 9 of the most recent Intel ISE available from
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf

The first patch parses user input with the appropriate sysfs API that has
not previously been used in resctrl. The second patch is added as a
subsequent cleanup that switches existing resctrl string parsing code
to also use this appropriate API.

Reinette Chatre (2):
  x86/resctrl: Enable user to view and select thread throttling mode
  x86/resctrl: Use appropriate API for strings terminated by newline

 Documentation/x86/resctrl_ui.rst       |  21 ++-
 arch/x86/kernel/cpu/resctrl/core.c     |  29 ++++
 arch/x86/kernel/cpu/resctrl/internal.h |   9 +
 arch/x86/kernel/cpu/resctrl/rdtgroup.c | 221 +++++++++++++++++++++++--
 4 files changed, 266 insertions(+), 14 deletions(-)

-- 
2.21.0