[V6,7/7] docs: mm: numaperf.rst Add brief description for access class 1.
diff mbox series

Message ID 20191216153809.105463-8-Jonathan.Cameron@huawei.com
State New
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Series
  • ACPI: Support Generic Initiator proximity domains
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Commit Message

Jonathan Cameron Dec. 16, 2019, 3:38 p.m. UTC
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>
---
 Documentation/admin-guide/mm/numaperf.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Brice Goglin Dec. 18, 2019, 11:34 a.m. UTC | #1
Le 16/12/2019 à 16:38, Jonathan Cameron a écrit :
> 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>
> ---
>  Documentation/admin-guide/mm/numaperf.rst | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst
> index a80c3c37226e..327c0d72692d 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 CPUs.  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 0, takes the same form, but only includes values for CPU to
> +memory activity.


Shouldn't this be "class 1" here?

Both hunks look contradictory to me.

Brice
Jonathan Cameron Dec. 18, 2019, 2:37 p.m. UTC | #2
On Wed, 18 Dec 2019 12:34:34 +0100
Brice Goglin <brice.goglin@gmail.com> wrote:

> Le 16/12/2019 à 16:38, Jonathan Cameron a écrit :
> > 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>
> > ---
> >  Documentation/admin-guide/mm/numaperf.rst | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst
> > index a80c3c37226e..327c0d72692d 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 CPUs.  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 0, takes the same form, but only includes values for CPU to
> > +memory activity.  
> 
> 
> Shouldn't this be "class 1" here?
> 
Good point.

Jonathan

> Both hunks look contradictory to me.
> 
> Brice
> 
>

Patch
diff mbox series

diff --git a/Documentation/admin-guide/mm/numaperf.rst b/Documentation/admin-guide/mm/numaperf.rst
index a80c3c37226e..327c0d72692d 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 CPUs.  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 0, takes the same form, but only includes values for CPU to
+memory activity.
+
 ==========
 NUMA Cache
 ==========