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hwloc describes the core/processor/cache/memory layout where a program is running; no other library does this that well. I am developing infrastructure for multi-threading, and need to decide how to lay out threads so that they traverse multi-dimensional arrays in the most efficient manner. Before hwloc, I had to manually set up tables describing each system where my application (the Einstein Toolkit) would run. hwloc allows automating this, making this much simpler and more flexible.
hwloc describes the core/processor/cache/memory layout where a program is running; no other library does this that well. I am developing infrastructure for multi-threading, and need to decide how to lay out threads so that they traverse multi-dimensional arrays in the most efficient manner. Before hwloc, I had to manually set up tables describing each system where my application (the Einstein Toolkit) would run. hwloc allows automating this, making this much simpler and more flexible.