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AMD's gift to software developers
On Monday, AMD released a proposal for "Lightweight Profiling" instructions (or LWP; download here), describing a new way for software developers to gather information on software while it runs.
I've only had a few minutes to check out the document, but it looks pretty interesting. Existing performance analysis tools, like Intel's VTune and AMD's CodeAnalyst, generally create significant overhead when gathering performance information. They usually need code that runs in supervisor mode, for example, and they're just for developer use--they aren't meant to be used in production systems.
LWP lets applications gather their … Read more
