Autonomously Finding Performance Regressions In The Linux Kernel

[ Thanks to Michael Larabel for this link. ]

"Long story short, in tracking down this performance regression we have finally devised a way to autonomously locate performance regressions within the Linux kernel and potentially any Git-based project for that matter. Here are a few details.

"For some background information on the test that led to this work, the PostgreSQL performance under the Linux 2.6.32-rc1 through the Linux 2.6.32-rc5 (and still in Git master) is in shambles when compared to earlier kernels (tested Linux 2.6.30 and 2.6.31 for comparison). This regression was found using the same kernel configuration with the default options on a clean Ubuntu 9.10 installation. To ensure this wasn't an isolated incident, first this regression was confirmed on an entirely different system -- a dual AMD Opteron system compared to an Intel Atom "nettop" system."

Complete Story

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