Pedro Mindlin - Academia.edu (original) (raw)

Papers by Pedro Mindlin

IEEE International Symposium on - ISPASS Performance Analysis of Systems and Software, 2004

Leonard0 R. Bachega, Jose R. Brunhemto, Luiz DeRose, Pedro Mindlin and JosC E. Moreira IBM Thomas... more Leonard0 R. Bachega, Jose R. Brunhemto, Luiz DeRose, Pedro Mindlin and JosC E. Moreira IBM Thomas J. Watson Research Center Yorktown Heights, NY 10598-0218 {lrbacheg,brunhe,laderose,pamindli,jmoreira}~us.ibm.com ... Absnwcl-The design and ...

WSEAS Transactions on Information Science and Applications, Jun 1, 2005

This paper presents the Heterogeneous Network QoS Evaluation Tool. This tool should help to manag... more This paper presents the Heterogeneous Network QoS Evaluation Tool. This tool should help to manage technical influences on the system and allow the consumer/user to evaluate real applications and services from a qualitative point of view. It simulates the behaviour of a real network with the transmission of real data like video streams. We tested our tool using Mpeg2 and Mpeg4 video transmissions over Real Time Protocol. We also propose a method for validating this tool by measuring the distance between its results and real networks ...

The development of electronic commerce has led to a new trend: the distribution of digital inform... more The development of electronic commerce has led to a new trend: the distribution of digital information. Micropayment systems come as an alternative, allowing the implementation of such transactions at low costs. This work introduces a micropayment system based on central generation of electronic coins that are bought by and distributed among customers and easily verified-and thus accepted as payment-by electronic commerce vendors. It differentiates itself by generating a single group of tokens that can be used for shopping in all of these vendors. This process is performed concerning security and scalability requirements. The development of electronic commerce has led to the development of a new category of payment systems. Many of them already exist and are currently being used, such as credit card and electronic money systems. However, these systems usually can't be used for small amount payments and they present high latencies for each transaction. Micropayment systems were designed to solve both questions to small amount transactions-concerning also security and scalability requirements that are inherent to any payment system to be implemented in open networks. The possibility of performing small amount transactions opens interesting new paths to electronic commerce: it makes selling information products-with values in the range of cents, such as images or access to information pages or individual news texts-possible.

IEEE International Symposium on - ISPASS Performance Analysis of Systems and Software, 2004, 2004

WSEAS Transactions on Information Science and Applications, Jun 1, 2005

The BlueGene/L supercomputer will use system-on-a-chip integration and a highly scalable cellular... more The BlueGene/L supercomputer will use system-on-a-chip integration and a highly scalable cellular architecture to deliver 360 Teraflops of peak computing power. With 65,536 compute nodes, BlueGene/L represents a new level of scalability for parallel systems. As such, it is natural for many scalability challenges to arise. In this paper, we discuss challenges in the area of system management and control, including machine booting, software installation, user account management, system monitoring, and job exe-cution. We address the issue of scalability by organizing the system hierarchically. The 65,536 compute nodes are or-ganized in 1,024 clusters of 64 compute nodes each, called processing sets. Each processing set is under control of a 65 th node, called an I/O node. The 1,024 processing sets can then be managed to a great extent as a regular Linux cluster, of which there are several successful examples. Reg-ular cluster management is complemented by BlueGene/L specific services, ...

Hardware performance monitoring is the basis of modern performance analysis tools for application... more Hardware performance monitoring is the basis of modern performance analysis tools for application optimization. We are interested in providing such performance analysis tools for the new BlueGene/L supercomputer as early as possible, so that applications can be tuned for that machine. We are faced with two challenges in achieving that goal. First, the machine is still going through its final design and assembly stages and, therefore, it is not yet available to system and application programmers. Second, and most important, key hardware performance metrics, such as instruction counters and Level 1 cache behavior counters, are missing from the BlueGene/L architecture. Our solution to those problems has been to implement a set of nonarchitected performance counters in an instructionset simulator of BlueGene/L, and to provide a mechanism for executing code to retrieve the value of those counters. Using that mechanism, we have ported a version of the libHPM performance analysis library. We validate our implementation by comparing our results for BlueGene/L to analytical models and to results from a real machine.

E-Commerce, E-Business, and E-Government, 2003

1 Introduction The rapid advances recently in mobile devices, wireless networking, and messaging ... more 1 Introduction The rapid advances recently in mobile devices, wireless networking, and messaging technologies have given mobile users an excess of choices to access service contents [9]. Unfortunately, all these devices and protocols, such as Palm PDAs, cell phones with ...

IEEE International Symposium on - ISPASS Performance Analysis of Systems and Software, 2004

WSEAS Transactions on Information Science and Applications, Jun 1, 2005

IEEE International Symposium on - ISPASS Performance Analysis of Systems and Software, 2004, 2004

WSEAS Transactions on Information Science and Applications, Jun 1, 2005

E-Commerce, E-Business, and E-Government, 2003