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by jgalar
2920 days ago
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Mathieu's (patch author) main motivation was removing atomic operation from the LTTng userspace tracer's hot path. In that case, the per-cpu data is the 'reserve' and 'commit' counters that must be updated when the tracer saves an event to the per-CPU buffers. Other uses that I'm aware of include memory allocators that maintain per-CPU arenas. |
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