From: Jonathan Cameron Date: Wed, 30 Sep 2020 14:05:47 +0000 (+0800) Subject: docs: mm: numaperf.rst Add brief description for access class 1. X-Git-Tag: v5.10-rc1~149^2~2^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dc9e7860df91625fef04d7016182653e8f678f05;p=thirdparty%2Fkernel%2Flinux.git docs: mm: numaperf.rst Add brief description for access class 1. 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 Signed-off-by: Rafael J. Wysocki --- diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst index 4d69ef1de8303..86f2a3c4b6387 100644 --- a/Documentation/admin-guide/mm/numaperf.rst +++ b/Documentation/admin-guide/mm/numaperf.rst @@ -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 ==========