NUMA Distance for Heterogeneous Memory
Author/Presenter
Event Type
Workshop
Compiler Analysis and Optimization
NVRAM
Parallel Programming Languages, Libraries, Models
and Notations
Performance
SIGHPC Workshop
TimeSunday, November 12th12pm -
12:15pm
Location702
DescriptionExperience with Intel Xeon Phi suggests that NUMA alone
is inadequate for assignment of pages to devices in
heterogeneous memory systems. We argue that this is
because NUMA is based on a single distance metric
between all domains (i.e., number of devices “in
between” the domains), while relationships between
heterogeneous domains can and should be characterized by
multiple metrics (e.g., latency, bandwidth, capacity).
We therefore propose elaborating the concept of NUMA
distance to give better and more intuitive control of
placement of pages, while retaining most of the
simplicity of the NUMA abstraction. This can be based on
minor modification of the Linux kernel, with the
possibility for further development by hardware
vendors.
Author/Presenter
