* Rik van Riel <riel@xxxxxxxxxx> wrote: > On 12/10/2012 01:22 PM, Thomas Gleixner wrote: > > > So autonuma and numacore are basically on the same page, > > with a slight advantage for numacore in the THP enabled > > case. balancenuma is closer to mainline than to > > autonuma/numacore. > > Indeed, when the system is fully loaded, numacore does very > well. Note that the latest (-v3) code also does well in under-loaded situations: http://lkml.org/lkml/2012/12/7/331 Here's the 'perf bench numa' comparison to 'balancenuma': balancenuma | NUMA-tip [test unit] : -v10 | -v3 ------------------------------------------------------------ 2x1-bw-process : 6.136 | 9.647: 57.2% 3x1-bw-process : 7.250 | 14.528: 100.4% 4x1-bw-process : 6.867 | 18.903: 175.3% 8x1-bw-process : 7.974 | 26.829: 236.5% 8x1-bw-process-NOTHP : 5.937 | 22.237: 274.5% 16x1-bw-process : 5.592 | 29.294: 423.9% 4x1-bw-thread : 13.598 | 19.290: 41.9% 8x1-bw-thread : 16.356 | 26.391: 61.4% 16x1-bw-thread : 24.608 | 29.557: 20.1% 32x1-bw-thread : 25.477 | 30.232: 18.7% 2x3-bw-thread : 8.785 | 15.327: 74.5% 4x4-bw-thread : 6.366 | 27.957: 339.2% 4x6-bw-thread : 6.287 | 27.877: 343.4% 4x8-bw-thread : 5.860 | 28.439: 385.3% 4x8-bw-thread-NOTHP : 6.167 | 25.067: 306.5% 3x3-bw-thread : 8.235 | 21.560: 161.8% 5x5-bw-thread : 5.762 | 26.081: 352.6% 2x16-bw-thread : 5.920 | 23.269: 293.1% 1x32-bw-thread : 5.828 | 18.985: 225.8% numa02-bw : 29.054 | 31.431: 8.2% numa02-bw-NOTHP : 27.064 | 29.104: 7.5% numa01-bw-thread : 20.338 | 28.607: 40.7% numa01-bw-thread-NOTHP : 18.528 | 21.119: 14.0% ------------------------------------------------------------ More than half of these testcases are under-loaded situations. > The main issues that have been observed with numacore are when > the system is only partially loaded. Something strange seems > to be going on that causes performance regressions in that > situation. I haven't seen such reports with -v3 yet, which is what Thomas tested. Mel has not tested -v3 yet AFAICS. If there are any such instances left then I'll investigate, but right now it's looking pretty good. Thanks, Ingo -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>