Section: New Results

TABARNAC: Tools for Analyzing Behavior of Applications Running on NUMA Architecture.

In modern parallel architectures, memory accesses represent a common bottleneck. We develop TABARNAC, a tool for analyzing the memory behavior of parallel applications with a focus on NUMA architectures. TABARNAC provides a new visualization of the memory access behavior, focusing on the distribution of accesses by thread and by structure. Such visualization allows the developer to easily understand why performance issues occur. Using TABARNAC, we explain why some applications do not benefit from data and thread mapping. Moreover, we propose several code modifications to improve the memory access behavior of several parallel applications [29] .