cs.PF cs.PF

A supercomputer simulating laser plasma is like a kitchen where hundreds of chefs are preparing a single dish. If ten people crowd around one stove while another stands empty, the work grinds to a halt. The same happens in simulations: plasma particles bunch up in certain regions of space, leaving others nearly empty.

Recommendation systems that decide which post you’ll see next run on deep neural networks made up of thousands of operations — intricate computation Graphs (blueprints of operations on data). These systems are living, ever-evolving Dynamical Systems: the slightest architecture change cascades through the entire graph.

Seven cores froze at an invisible barrier. The eighth lingered on someone else's process, and the entire LLM inference hung. That's the central collision of machine learning tasks and ordinary processes sharing a CPU. An inference gang demands that all cores strike in perfect unison — otherwise silence.