On Thu, Mar 16, 2017 at 02:38:44PM -0500, Alex Thorlton wrote: > On Wed, Mar 15, 2017 at 04:59:59PM +0800, Aaron Lu wrote: > > v2 changes: Nothing major, only minor ones. > > - rebased on top of v4.11-rc2-mmotm-2017-03-14-15-41; > > - use list_add_tail instead of list_add to add worker to tlb's worker > > list so that when doing flush, the first queued worker gets flushed > > first(based on the comsumption that the first queued worker has a > > better chance of finishing its job than those later queued workers); > > - use bool instead of int for variable free_batch_page in function > > tlb_flush_mmu_free_batches; > > - style change according to ./scripts/checkpatch; > > - reword some of the changelogs to make it more readable. > > > > v1 is here: > > https://lkml.org/lkml/2017/2/24/245 > > I tested v1 on a Haswell system with 64 sockets/1024 cores/2048 threads > and 8TB of RAM, with a 1TB malloc. The average free() time for a 1TB > malloc on a vanilla kernel was 41.69s, the patched kernel averaged > 21.56s for the same test. Thanks a lot for the test result. > > I am testing v2 now and will report back with results in the next day or > so. Testing plain v2 shouldn't bring any surprise/difference, better set the following param before the test(I'm planning to make them default in the next version): # echo 64 > /sys/devices/virtual/workqueue/batch_free_wq/max_active # echo 1030 > /sys/kernel/debug/parallel_free/max_gather_batch_count Regards, Aaron -- 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>
