Publication Type
Conference Paper
Publication Date
Volume
n/a
Conference Name
CUG 2011
Conference Location
Fairbanks, Alaska, United States of America
Conference Sponsor
CUG
Conference Date
-
Abstract
We present a new high precision clock synchronization algorithm designed for large XT4 and XT5 leadership-class machines. The algorithm, which is designed to support OS noise reduction through co-scheduling, is suitable for usage cases requiring low overhead and minimal time deviation between nodes. Unlike most high-precision algorithms which reach their precision in a post-mortem analysis after the application has completed, the new ORNL developed algorithm rapidly provides precise results during runtime. Previous to our work, the leading high-precision clock synchronization algorithms that made results available during runtime relied on probabilistic schemes that are not guaranteed to result in
an answer.
