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KernelTrap: Benchmarking Scheduling Latency

Oct 03, 2003, 04:00 (0 Talkback[s])

[ Thanks to Jeremy Andrews for this link. ]

"Rick Lindsley recently uploaded some interesting comparisons of scheduler latency between 2.6.0-test5, -test5-mm3, -test6, and -test6-mm1 with four different benchmarks. The benchmarks used were Volanomark, SPECjbb, SPECdets, and the Kernbench kernel compilation scripts. His summmary looks at how performance has changed, how scheduler behavior has changed, and how these changes affect the different benchmarking tools used. He explains:

"'High latency would usually indicate congested runqueues. High runslices generally indicates workloads that were cpu-bound. Different benchmarks have different 'normal' behavior, however. Although results were gathered, most benchmarks were run in an abbreviated manner to see trends and characteristics rather than run full out, fully tuned, to get valid test results...'"

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