On Fri, Aug 26, 2011 at 08:11:50PM +0800, Peter Zijlstra wrote: > On Fri, 2011-08-26 at 19:26 +0800, Wu Fengguang wrote: > > Now I get 3 figures. Test case is: run 1 dd write task for 300s, with > > a "disturber" dd read task during roughly 120-130s. > > Ah, but ideally the disturber task should run in bursts of 100ms > (<feedback period), otherwise your N is indeed mostly constant. Ah yeah, the disturber task should be a dd writer! Then we get - 120s: N=1 => N=2 - 130s: N=2 => N=1 I'll try it right away. Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
