lect10-cray-bluegene

lect10-cray-bluegene - Notes ! OpenMP project due Wednesday...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CMSC 714 Lecture 10 Cray XT4 and IBM Blue Gene/L Alan Sussman 2 CMSC 714 - Alan Sussman Notes ! OpenMP project due Wednesday at 6PM – Questions? – MPI project grades by tomorrow ! Sample topics for group project posted, and proposal deadline is Oct. 26 3 Cray XT4 vs. XT3 ! Dual core AMD Opteron nodes (later upgraded to quad core) with integrated memory controller for DDR2 RAM (up to 12.8 GB/sec) ! Nodes connected via SeaStar2 3D toroidal network – sustained bi-directional bandwith of 6GB/sec over 6 links – Opteron memory bus directly connected to SeaStar chip (like Intel QPI), not to I/O bus ! Compute nodes run a stripped down version of Linux from Sandia, for scaling – to limit effects of OS activities on computations – and limit effects of contention between multiple processes/ threads running on multiple cores within a node – two modes – virtual node (VN) and single/serial node (SN) ! Lustre parallel filesystem – multiple I/O nodes on SeaStar network, running full Linux,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/12/2012 for the course CMSC 714 taught by Professor Staff during the Fall '07 term at Maryland.

Page1 / 2

lect10-cray-bluegene - Notes ! OpenMP project due Wednesday...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online