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KS2010: Performance regressions
Posted Nov 2, 2010 13:07 UTC (Tue) by jbh (subscriber, #494)
Posted Nov 2, 2010 13:12 UTC (Tue) by Cyberax (✭ supporter ✭, #52523)
Phoromatic tracker allows you to track only one variable (kernel version), while leaving everything else frozen. They even have support for btrfs snapshots to quickly revert system to a known state.
But seriously, Phoronix tracker is quite useful now.
Posted Nov 2, 2010 13:54 UTC (Tue) by jbh (subscriber, #494)
But the arbitrary mix of operations-per-seconds and seconds-to-complete is very annoying, it means I have to read the fine print on every graph to parse it. Gah!
Posted Nov 2, 2010 15:15 UTC (Tue) by Cyberax (✭ supporter ✭, #52523)
Single-threaded benchmarks are not pointless. I had regressions in single-thread workloads caused by 'too clever' locking which had higher overhead than good old lock_kernel.
Anyway, it's certainly possible to disable uninteresting benchmarks in Phoromatic.
Posted Nov 2, 2010 21:29 UTC (Tue) by jbh (subscriber, #494)
Posted Nov 3, 2010 5:32 UTC (Wed) by mtippett (guest, #70976)
Phoronix Test Suite is just a system to run tests in a repeated manner. If you keep the compiler consistent between kernels you are only testing the kernel. People usually raise issues when there are multiple variables changing between systems under tests (some say the kernel, some say the compiler, some say the filesystem).
Posted Nov 3, 2010 8:01 UTC (Wed) by jbh (subscriber, #494)
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