On Wed, Jan 16, 2019 at 6:59 PM Keith Busch <keith.busch@xxxxxxxxx> wrote: > > Add descriptions for memory class initiator performance access attributes. Again, I would combine this with the previous patch. > Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx> > --- > Documentation/ABI/stable/sysfs-devices-node | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/Documentation/ABI/stable/sysfs-devices-node b/Documentation/ABI/stable/sysfs-devices-node > index a9c47b4b0eee..2217557f29d3 100644 > --- a/Documentation/ABI/stable/sysfs-devices-node > +++ b/Documentation/ABI/stable/sysfs-devices-node > @@ -114,3 +114,31 @@ Description: > The node list of memory targets that this initiator node has > class "Y" access. Memory accesses from this node to nodes not > in this list may have differet performance. > + > +What: /sys/devices/system/node/nodeX/classY/read_bandwidth > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + This node's read bandwidth in MB/s available to memory > + initiators in nodes found in this class's initiators_nodelist. > + > +What: /sys/devices/system/node/nodeX/classY/read_latency > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + This node's read latency in nanoseconds available to memory > + initiators in nodes found in this class's initiators_nodelist. I'm not sure if the term "read latency" is sufficient here. Is this the latency between sending a request and getting a response or between sending the request and when the data actually becomes available? Moreover, is it the worst-case latency or the average latency? > + > +What: /sys/devices/system/node/nodeX/classY/write_bandwidth > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + This node's write bandwidth in MB/s available to memory > + initiators in nodes found in this class's initiators_nodelist. > + > +What: /sys/devices/system/node/nodeX/classY/write_latency > +Date: December 2018 > +Contact: Keith Busch <keith.busch@xxxxxxxxx> > +Description: > + This node's write latency in nanoseconds available to memory > + initiators in nodes found in this class's initiators_nodelist. > -- Same questions as for the read latency apply here.
