On 11/24/12, Mel Gorman <mgorman@xxxxxxx> wrote: > Warning: This is an insanely long mail and there a lot of data here. Get > coffee or something. > > This is another round of comparisons between the latest released versions > of each of three automatic numa balancing trees that are out there. > > From the series "Automatic NUMA Balancing V5", the kernels tested were > > stats-v5r1 Patches 1-10. TLB optimisations, migration stats > thpmigrate-v5r1 Patches 1-37. Basic placement policy, PMD handling, THP > migration etc. > adaptscan-v5r1 Patches 1-38. Heavy handed PTE scan reduction > delaystart-v5r1 Patches 1-40. Delay the PTE scan until running on a new > node > > If I just say balancenuma, I mean the "delaystart-v5r1" kernel. The other > kernels are included so you can see the impact the scan rate adaption > patch has and what that might mean for a placement policy using a proper > feedback mechanism. > > The other two kernels were > > numacore-20121123 It was no longer clear what the deltas between releases > and > the dependencies might be so I just pulled tip/master on November > 23rd, 2012. An earlier pull had serious difficulties and the patch > responsible has been dropped since. This is not a like-with-like > comparison as the tree contains numerous other patches but it's > the best available given the timeframe > > autonuma-v28fast This is a rebased version of Andrea's autonuma-v28fast > branch with Hugh's THP migration patch on top. FYI, based on how target huge page is selected, + + new_page = alloc_pages_node(numa_node_id(), + (GFP_TRANSHUGE | GFP_THISNODE) & ~__GFP_WAIT, HPAGE_PMD_ORDER); the thp replacement policy is changed to be MORON, + /* Migrate the page towards the node whose CPU is referencing it */ + if (pol->flags & MPOL_F_MORON) + polnid = numa_node_id(); described in [PATCH 29/46] mm: numa: Migrate on reference policy https://lkml.org/lkml/2012/11/21/228 Hillf -- 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>