Google Sponsors Improvements to FreeBSD

Google Sponsors Improvements to FreeBSD’s Performance Measurement Toolkit

Google BSD SearchRecently, Google sponsored the development of an oft requested enhancement to FreeBSD’s PmcTools: that of capturing the call chains leading to “hot” locations in the code. Call chains provide additional insight into the behavior of the system; in addition to determining the “hot” locations in the code, developers gain insight into why these locations became “hot” in the first place.

HWPMC and associated userland tools have been invaluable to the FreeBSD community in improving the scalability and performance of the upcoming FreeBSD 7 release. Kris Kennaway of the FreeBSD Project notes that

hwpmc is one of our most powerful tools for measuring and understanding CPU performance on FreeBSD. Support for profiling of call graphs was an important missing piece that will simplify the ability of developers to analyze performance bottlenecks in the kernel and in application code.

More on the Google Code Blog.

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