On Fri, Oct 14, 2011 at 08:57:16AM -0500, Christoph Lameter wrote: > On Fri, 14 Oct 2011, Dimitri Sivanich wrote: > > > Testing on a smaller machine with 46 writer threads in parallel (my original > > test used 120). > > > > Looks as though cache-aligning and padding the end of the vm_stat array > > results in a ~150 MB/sec speedup. This is a nice improvement for only 46 > > writer threads, though it's not the full ~250 MB/sec speedup I get from > > setting OVERCOMMIT_NEVER. > > Add to this the increase in the deltas for the ZVCs and change the stat > interval to 10 sec? Increasing the ZVC deltas (threshold value in calculate*threshold == 125) does -seem- to give a small speedup in this case (maybe as much as 50 MB/sec?). Changing the stat interval to 10 seconds still has no effect, with or without the ZVC delta change. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>