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docs: mm: numaperf.rst Add brief description for access class 1.

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Try to make minimal changes to the document which already describes
access class 0 in a generic fashion (including IO initiatiors that
are not CPUs).

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Jonathan Cameron 2020-09-30 22:05:47 +08:00 committed by Rafael J. Wysocki
parent b9fffe4721
commit dc9e7860df
1 changed files with 8 additions and 0 deletions
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Documentation/admin-guide/mm/numaperf.rst
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@ -56,6 +56,11 @@ nodes' access characteristics share the same performance relative to other
linked initiator nodes. Each target within an initiator's access class,
though, do not necessarily perform the same as each other.
The access class "1" is used to allow differentiation between initiators
that are CPUs and hence suitable for generic task scheduling, and
IO initiators such as GPUs and NICs. Unlike access class 0, only
nodes containing CPUs are considered.
================
NUMA Performance
================
@ -88,6 +93,9 @@ The latency attributes are provided in nanoseconds.
The values reported here correspond to the rated latency and bandwidth
for the platform.
Access class 1 takes the same form but only includes values for CPU to
memory activity.
==========
NUMA Cache
==========