On 20 August 2012 00:41, Michael Hope <michael.h...@linaro.org> wrote: > On 20 August 2012 11:36, Mans Rullgard <mans.rullg...@linaro.org> wrote: >> On 19 August 2012 23:55, Michael Hope <michael.h...@linaro.org> wrote: >>>> On 17 August 2012 00:37, Michael Hope <michael.h...@linaro.org> wrote: >>>>> Hi there. I'm seeing a huge improvement in the SPEC floating point >>>>> benchmarks between a hacked Ubuntu Precise 3.2.14 kernel and Linus >>>>> 3.5. Does anyone know why off the top of their head? >>>> >>>> Hacked how? How big a change? What does perf say? >>> >>> It's a different config but otherwise the same as the Ubuntu >>> linux-ti-omap4_3.2.0-1412.16 package. perf is next. >> >> So... what did you change? > > The config file is here: > http://people.linaro.org/~michaelh/incoming/precise.config > > It's mainly turning power management and similar features off. I > didn't touch the errata or other core config. The next step would be > to run the Ubuntu supplied build and see if performs the same as my > reconfigured version to check if it's in the Precise tree or just my > fault.
Changing power management options can affect the maximum CPU clock, but that would not be specific to floating-point. Let's get those perf numbers and see what that hints at. -- Mans Rullgard / mru _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
