Martin Wilck wrote: > Hello, > > we recently did SPECpower benchmark measurements on a 2xQuad-Core > Harpertown (Intel E5440) Server and found that the results were > generally slightly better under Windows than under Linux, despite Linux > technology like the tickless kernel. The reason was twofold: > > 1 The raw performance value under Windows is 1-2% better. This seems to > be a matter of optimization of the JVM used (BEA), not a lot we can do > about it. > > 2 The power consumption under Linux at 100% and 0% load is approx. the > same as under Windows. But in the intermediate levels 50%-10%, Windows > is roughly 3-5W better (increasing towards lower load levels). This > suggests that Windows power management is more aggressive than Linux. Is > there a description somewhere how to modify cpuidle governor tunables? > > The kernel used was Fedora Rawhide 2.6.24-fc9 (x86_64).
remember that rawhide has the various kernel debug options enabled ;) I'll CC Tim who might be able to give you some other suggestions wrt specpower _______________________________________________ Discuss mailing list [email protected] http://mail.lesswatts.org/mailman/listinfo/discuss
