Linux Kernel Benchmarks Of 2.6.24 Through 2.6.39
The FS-Mark test experiences a large drop in performance with the Linux 2.6.33 kernel, but that is fixed in Linux 2.6.34+. Since then the results have been largely unchanged and there was not the 2.6.30-to-2.6.32 regression.
When running the FS-Mark test but without enforcing sync/fsync, the performance is on the rise through the early 2.6.30 kernel releases but there is a pullback with 2.6.37.
The Threaded I/O Tester with its random writes has relatively unchanged performance across all of the kernels tested.
More of these test results can be found on OpenBenchmarking.org.
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