x86/intel_rdt/mbm: Add mbm counter initialization

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MBM counters are monotonically increasing counts representing the total
memory bytes at a particular time. In order to calculate total_bytes for
an rdtgroup, we store the value of the counter when we create an
rdtgroup or when a new domain comes online.

When the total_bytes(all memory controller bytes) or local_bytes(local
memory controller bytes) file in "mon_data" is read it shows the
total bytes for that rdtgroup since its creation. User can snapshot this
at different time intervals to obtain bytes/second.

Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: eranian@google.com
Cc: vikas.shivappa@intel.com
Cc: ak@linux.intel.com
Cc: davidcc@google.com
Cc: reinette.chatre@intel.com
Link: http://lkml.kernel.org/r/1501017287-28083-28-git-send-email-vikas.shivappa@linux.intel.com

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This commit is contained in:

Vikas Shivappa 2017-07-25 14:14:46 -07:00 • committed by Thomas Gleixner

parent 9f52425ba3

commit a4de1dfdd7

4 changed files with 23 additions and 2 deletions

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9

arch/x86/kernel/cpu/intel_rdt.h

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5

arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c

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7

arch/x86/kernel/cpu/intel_rdt_monitor.c

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4

arch/x86/kernel/cpu/intel_rdt_rdtgroup.c

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