Messages in this thread | | | Subject | Re: [PATCH 0/2] x86/resctrl: Support wider MBM counters | From | Reinette Chatre <> | Date | Thu, 23 Apr 2020 09:40:27 -0700 |
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Hi Thomas and Borislav,
On 4/1/2020 10:51 AM, Reinette Chatre wrote: > Memory Bandwidth Monitoring (MBM) is an Intel Resource Director > Technology (RDT) feature that tracks Total and Local bandwidth > generated which misses the L3 cache. > > The original Memory Bandwidth Monitoring (MBM) architectural > definition defines counters of up to 62 bits and the first-generation > MBM implementation uses 24 bit counters. Software is required to poll > at 1 second or faster to ensure that data is retrieved before a counter > rollover occurs more than once under worst conditions. > > As system bandwidths scale the software requirement is maintained with > the introduction of a per-resource enumerable MBM counter width. > > This series adds support for the new enumerable MBM counter width. > > Details about the feature can be found 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 > > Reinette Chatre (2): > x86/resctrl: Maintain MBM counter width per resource > x86/resctrl: Support CPUID enumeration of MBM counter width > > arch/x86/include/asm/processor.h | 1 + > arch/x86/kernel/cpu/common.c | 5 +++++ > arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 8 ++++--- > arch/x86/kernel/cpu/resctrl/internal.h | 15 ++++++++++--- > arch/x86/kernel/cpu/resctrl/monitor.c | 27 ++++++++++++++++------- > arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +- > 6 files changed, 43 insertions(+), 15 deletions(-) >
Would it be possible to consider this for inclusion in v5.8?
Thank you
Reinette
ps. Upon your consideration I am planning to follow up with same the question for the next resctrl new feature series available at:https://lore.kernel.org/lkml/cover.1586801373.git.reinette.chatre@intel.com/
You could view outstanding resctrl changes at branch resctrl/next of https://github.com/rchatre/linux.git
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