Linux kernel co-scheduling for bulk synchronous parallel applications
Proceedings of the 1st International Workshop on Runtime and Operating Systems for Supercomputers
Linux kernel co-scheduling and bulk synchronous parallelism
International Journal of High Performance Computing Applications
Hi-index | 0.00 |
We present a new software-based clock synchronization scheme that provides high precision time agreement among distributed memory nodes. The technique is designed to minimize variance from a reference chimer during runtime and with minimal time-request latency. Our scheme permits initial unbounded variations in time and corrects both slow and fast chimers (clock skew). An implementation developed within the context of the MPI message passing interface is described and time coordination measurements are presented. Among our results, the mean time variance among a set of nodes improved from 20.0 milliseconds under standard Network Time Protocol (NTP) to 2.29 μsecs under our scheme.