Hello everyone, It's time for a new autonuma-alpha14 milestone. Removed the [RFC] from Subject because 1) this is a release I'm quite happy with (from the implementation side it allows the same kernel image to boot optimally on NUMA and not-NUMA hardware and it avoids altering the scheduler runtime most of the time) and 2) because of the great benchmark results we got so far, showing this design so far has been proved to perform best. I believe (realistically speaking) nobody is going to change applications to specify which thread is using which memory (for threaded apps) with the only exception of QEMU and a few others. For not threaded apps that fits in a NUMA node, there's no way a blind home node can perform nearly as good as AutoNUMA: AutoNUMA monitor the whole status of the memory of the running processes and it optimizes the memory placement and CPU placement dynamically accordingly. There's a small memory and CPU cost in collecting so much information to be able to make smart decisions, but the benefits largely outweight those costs. If a big idle task was idle for a long while, but it suddenly start computing, AutoNUMA may totally change the memory and CPU placement of the other running tasks according to what's best, because it has enough information to take optimal NUMA placement decisions. git clone --reference linux -b autonuma-alpha14 git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git autonuma-alpha14 Development autonuma branch (currently equal to autonuma-alpha14 == a49fedcc284a8e8b47175fbc23e9d3b075884e53): git clone --reference linux -b autonuma git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git to update: git fetch; git checkout -f origin/autonuma Changelog from alpha13 to alpha14: o page_autonuma introduction, no memory wasted if the kernel is booted on not-NUMA hardware. Tested with flatmem/sparsemem on x86 autonuma=y/n and sparsemem/vsparsemem on x86_64 with autonuma=y/n. The "noautonuma" kernel param disables autonuma permanently also when booted on NUMA hardware (no /sys/kernel/mm/autonuma, and no page_autonuma allocations, like cgroup_disable=memory) o autonuma_balance only runs along with run_rebalance_domains, to avoid altering the scheduler runtime. autonuma_balance gives a "kick" to the scheduler only along the load balance events (it overrides the load balance activity if needed). This change has not yet been tested on specjbb or more schedule intensive benchmarks, but I don't expect measurable NUMA affinity regressions. For intensive compute loads not involving a flood of scheduling activity this has already been verified not to show any performance regression, and it will boost the scheduler performance compared to previous autonuma releases. Note: autonuma_balance still runs from normal context (not softirq context like run_rebalance_domains) to be able to wait on process migration (avoid _nowait), but most of the time it does nothing at all. Changelog from alpha11 to alpha13: o autonuma_balance optimization (take the fast path when process is in the preferred NUMA node) TODO: o THP native migration (orthogonal and also needed for cpuset/migrate_pages(2)/numa/sched). o distribute pagecache to other nodes (and maybe shared memory or other movable memory) if knuma_migrated stops because the local node is full Andrea Arcangeli (35): mm: add unlikely to the mm allocation failure check autonuma: make set_pmd_at always available xen: document Xen is using an unused bit for the pagetables autonuma: define _PAGE_NUMA_PTE and _PAGE_NUMA_PMD autonuma: x86 pte_numa() and pmd_numa() autonuma: generic pte_numa() and pmd_numa() autonuma: teach gup_fast about pte_numa autonuma: introduce kthread_bind_node() autonuma: mm_autonuma and sched_autonuma data structures autonuma: define the autonuma flags autonuma: core autonuma.h header autonuma: CPU follow memory algorithm autonuma: add page structure fields autonuma: knuma_migrated per NUMA node queues autonuma: init knuma_migrated queues autonuma: autonuma_enter/exit autonuma: call autonuma_setup_new_exec() autonuma: alloc/free/init sched_autonuma autonuma: alloc/free/init mm_autonuma autonuma: avoid CFS select_task_rq_fair to return -1 autonuma: teach CFS about autonuma affinity autonuma: sched_set_autonuma_need_balance autonuma: core autonuma: follow_page check for pte_numa/pmd_numa autonuma: default mempolicy follow AutoNUMA autonuma: call autonuma_split_huge_page() autonuma: make khugepaged pte_numa aware autonuma: retain page last_nid information in khugepaged autonuma: numa hinting page faults entry points autonuma: reset autonuma page data when pages are freed autonuma: initialize page structure fields autonuma: link mm/autonuma.o and kernel/sched/numa.o autonuma: add CONFIG_AUTONUMA and CONFIG_AUTONUMA_DEFAULT_ENABLED autonuma: boost khugepaged scanning rate autonuma: page_autonuma arch/x86/include/asm/paravirt.h | 2 - arch/x86/include/asm/pgtable.h | 51 ++- arch/x86/include/asm/pgtable_types.h | 22 +- arch/x86/mm/gup.c | 2 +- fs/exec.c | 3 + include/asm-generic/pgtable.h | 12 + include/linux/autonuma.h | 53 ++ include/linux/autonuma_flags.h | 68 ++ include/linux/autonuma_sched.h | 50 ++ include/linux/autonuma_types.h | 88 ++ include/linux/huge_mm.h | 2 + include/linux/kthread.h | 1 + include/linux/mm_types.h | 5 + include/linux/mmzone.h | 18 + include/linux/page_autonuma.h | 53 ++ include/linux/sched.h | 3 + init/main.c | 2 + kernel/fork.c | 36 +- kernel/kthread.c | 23 + kernel/sched/Makefile | 1 + kernel/sched/core.c | 12 +- kernel/sched/fair.c | 72 ++- kernel/sched/numa.c | 281 +++++++ kernel/sched/sched.h | 10 + mm/Kconfig | 13 + mm/Makefile | 1 + mm/autonuma.c | 1464 ++++++++++++++++++++++++++++++++++ mm/huge_memory.c | 58 ++- mm/memory.c | 36 +- mm/mempolicy.c | 15 +- mm/mmu_context.c | 2 + mm/page_alloc.c | 6 +- mm/page_autonuma.c | 234 ++++++ mm/sparse.c | 126 +++- 34 files changed, 2776 insertions(+), 49 deletions(-) create mode 100644 include/linux/autonuma.h create mode 100644 include/linux/autonuma_flags.h create mode 100644 include/linux/autonuma_sched.h create mode 100644 include/linux/autonuma_types.h create mode 100644 include/linux/page_autonuma.h create mode 100644 kernel/sched/numa.c create mode 100644 mm/autonuma.c create mode 100644 mm/page_autonuma.c -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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