Evaluation of Knight Landing High Bandwidth Memory for
HPC Workloads
Author/Presenters
Event Type
Workshop
Applications
Architectures
Graph Algorithms
SIGHPC Workshop
TimeMonday, November 13th4:20pm -
4:30pm
Location507
DescriptionThe Intel Knight Landing (KNL) manycore chip includes
3D-stacked memory named MCDRAM, also known as High
Bandwidth Memory (HBM) for parallel applications that
needs to scale to high thread count. In this paper, we
provide a quantitative study of the KNL for HPC proxy
applications including Lulesh, HPCG, AMG, and Hotspot
when using DDR4 and MCDRAM. The results indicate that
HBM signicantly improves the performance of memory
intensive applications for as many as three times better
than DDR4 in HPCG, and Lulesh and HPCG for as many as
40% and 200%. For the selected compute intensive
applications, the performance advantage of MCDRAM over
DDR4 varies from 2% to 28%. We also observed that the
cross-points, where MCDRAM starts outperforming DDR4,
are around 8 to 16 threads.
Author/Presenters
