skip to main content

SciTech ConnectSciTech Connect

Title: Mechanism of supporting sub-communicator collectives with O(64) counters as opposed to one counter for each sub-communicator

A system and method for enhancing barrier collective synchronization on a computer system comprises a computer system including a data storage device. The computer system includes a program stored in the data storage device and steps of the program being executed by a processor. The system includes providing a plurality of communicators for storing state information for a bather algorithm. Each communicator designates a master core in a multi-processor environment of the computer system. The system allocates or designates one counter for each of a plurality of threads. The system configures a table with a number of entries equal to the maximum number of threads. The system sets a table entry with an ID associated with a communicator when a process thread initiates a collective. The system determines an allocated or designated counter by searching entries in the table.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
1092901
Report Number(s):
8,527,740
12/697,164
DOE Contract Number:
B554331
Resource Type:
Patent
Research Org:
International Business Machines Corporation (Armonk, NY)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING