Title: 		Anticipating Performance Information of Newly Portable Computers on 			the WLAN for Load Balancing

Authors: 	David Sánchez, Elsa M. Macías and Álvaro Suárez

Affiliation: 	University of Las Palmas de Gran Canaria
		Department of Ingeniería Telemática

Mail Address: 	Campus Universitario de Tafira s/n.
		Edif. Telecomunicaciones, Pab. C, 237
		Department of Ingeniería Telemática
		University of Las Palmas de Gran Canaria
		35017 Las Palmas de Gran Canaria
		SPAIN

E-mail Address:	David Sánchez 	david@dit.ulpgc.es
		Elsa M. Macías	elsa@dit.ulpgc.es
		Álvaro Suárez	alvaro@dit.ulpgc.es


Abstract:

Parallel and distributed computing over heterogeneous networks is a hot
topic nowadays. We have used a combination of a Local Area Network
(LAN) and a Wireless LAN (WLAN) to implement Master-Slave parallel
distributed programs which exhibit dependences among iterations and
parallel calculation inside an iteration. In this environment it is
necessary to consider the unbalance communication bandwidths and
computing power of fixed and portable computers to avoid long idle
times. To solve this problem, in our previous work, we developed an
efficient load balancing strategy considering that no new processes
are spawned in new portable computers at run time. Due to it is not
realistic, in this paper we present a new method for balancing the
parallel calculations when parallel processes are spawned on portable
computers which uses performance information supplied by a framework
based on the standard Simple Network Management Protocol (SNMP). With
this new method idle times are minimized and therefore better execution
times are obtained.