On Thu, 23 Jul 2009, Mel Gorman wrote: > oprofile_start.sh has the option of scaling the sampling of PMU events > by some factor. The reasoning is that oprofile introduces high overhead > when sampling at it's maximum rate - somewhere between 8% and 14% > depending on the workload. However, the minimum sampling rate for CPU > cycles and events such as DTLB misses are significantly different. CPU > cycles may know need to be scaled by a factor of 4 and DTLB misses by a > factor of 16 to get acceptable performance overhead of profiling. > > This patch allows CPU cycles and events to be scaled by separate values. > > Signed-off-by: Mel Gorman <m...@csn.ul.ie>
Applied, thanks. Eric
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