| Matthew Rosewarne on 16 Jun 2007 18:41:41 -0000 |
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On Saturday 16 June 2007, Antony P Joseph wrote: > I just listed the available governors. "Performance" is governors which > always sets frequency to the maximum. This governor is for systems that don't have continuous scaling, but instead only a fixed set of speeds (usually two), such as my P3. The "performance" governor is the counterpart of the "powersave" governor, which always sets the frequency to the minimum. Newer CPUs that support dynamic continuous scaling do not need such crude governors and are much better off using an intelligent governor such as "ondemand" instead of "performance". On battery, "conservative" is generally used, which actually does sacrifice some performance. > This feature looks like "hack" in "synchronous processors" to achieve > the power efficiency of "asynchronous processsors" by sacrificing > performance. Well, regardless of whether it's a hack or not, it does work and is a far better approach than leaving the processor running at full speed even when it isn't doing anything, which is why all modern CPUs do it. Seriously, did I not make it clear that there _isn't_ a performance hit already? I don't wish to be rude, but if you reply to someones message, do give them the bare minimum courtesy by at least reading it first. Attachment:
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