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Date: Fri, 17 Feb 2017 11:58:47 -0800 From: Vikas Shivappa <vikas.shivappa@...ux.intel.com> To: vikas.shivappa@...el.com Cc: linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com, tglx@...utronix.de, mingo@...nel.org, peterz@...radead.org, ravi.v.shankar@...el.com, tony.luck@...el.com, fenghua.yu@...el.com, andi.kleen@...el.com, vikas.shivappa@...ux.intel.com Subject: [PATCH 0/8 V2] x86/intel_rdt: Intel Memory bandwidth allocation Memory b/w allocation(MBA) is part of the Intel Resource Director Technology (RDT). RDT helps monitor and share processor shared resources. MBA helps enforce a limit on the memory bandwidth(b/w) threads can use when they are scheduled. OS does the enforcement using MSR(model specific register) interface and mapping the threads to architecture specific CLOSids(class of service IDs). The user interface is via the common resctrl fs for RDT features. This can be used along with MBM (memory b/w monitoring) and cache allocation to control and monitor the applications cache and memory resources as per the QoS or other performance requirements. Use cases could be large serverclusters, VM, clould and container based services where the admin or orchestration tools can use this framework to manage/allocate these processor shared resources like other memory/cpu resources to provide QoS guarentees. Detailed use case examples are documented in the 01/08 Documentation patch. Patches are dependent on : https://lkml.org/lkml/2017/2/17/595 V2 changes ---------- Thanks to Thomas for all the feed back and below are the changes as per the feedback: - Sent the RDT generic improvements patch series seperately - Split the info file/validate apis as prep patches to MBA changes - Fixed a lot of coding convention issues, variable initializations, and removing unnecessary allocations etc. - Changed the hotcpu handling for CLOS/RMID to zero the CLOSid/RMID when cpu is offlined. - Changed some naming conventions. - Changed the interface to show the bandwidth percentage that can be requested rather than showing h/w specific delay values which do not map to a particular b/w percentage in non-linear scale [PATCH 1/8] Documentation, x86: Documentation for Intel Mem b/w [PATCH 2/8] x86/intel_rdt/mba: Generalize the naming to get ready for [PATCH 3/8] x86/intel_rdt/mba: Memory b/w allocation feature detect [PATCH 4/8] x86/intel_rct/mba: Add MBA structures and initialize MBA [PATCH 5/8] x86/intel_rdt: info file support for MBA prepare [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA [PATCH 7/8] x86/intel_rdt: schemata file support for MBA prepare [PATCH 8/8] x86/intel_rdt/mba: Add schemata file support for MBA
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