On Wed, 27 Feb 2019 15:50:28 -0700 Keith Busch <keith.busch@xxxxxxxxx> wrote: > == Changes since v6 == > > Updated to linux-next, which has a change to the HMAT structures to > account for ACPI revision 6.3. > > Changed memory-side cache "associativity" attribute to "indexing" > > > Regarding the Kconfig, I am having the implementation specific as a user > selectable option, and the generic interface, HMEM_REPORTING, is not a > user prompt. I just wanted to clarify the point that there's only one. > > > == Background == > > Platforms may provide multiple types of cpu attached system memory. The > memory ranges for each type may have different characteristics that > applications may wish to know about when considering what node they want > their memory allocated from. > > It had previously been difficult to describe these setups as memory > rangers were generally lumped into the NUMA node of the CPUs. New > platform attributes have been created and in use today that describe > the more complex memory hierarchies that can be created. > > This series' objective is to provide the attributes from such systems > that are useful for applications to know about, and readily usable with > existing tools and libraries. Those applications may query performance > attributes relative to a particular CPU they're running on in order to > make more informed choices for where they want to allocate hot and cold > data. This works with mbind() or the numactl library. Hi Keith, Great to see this 'nearly' good to go. For those that were too small / trivial to deserve a reviewed-by Acked-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Subject to that one tweak in patch 7, Tested-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Note that my tests were very limited for the memory-side caches and not exactly comprehensive for the access attributes either. They focused on the cases I care about rather than putting together a fuller test suite. That is probably worth doing at some point though not sure I'll get to it any time soon. Thanks, Jonathan > > Keith Busch (10): > acpi: Create subtable parsing infrastructure > acpi: Add HMAT to generic parsing tables > acpi/hmat: Parse and report heterogeneous memory > node: Link memory nodes to their compute nodes > node: Add heterogenous memory access attributes > node: Add memory-side caching attributes > acpi/hmat: Register processor domain to its memory > acpi/hmat: Register performance attributes > acpi/hmat: Register memory side cache attributes > doc/mm: New documentation for memory performance > > Documentation/ABI/stable/sysfs-devices-node | 87 +++- > Documentation/admin-guide/mm/numaperf.rst | 164 +++++++ > arch/arm64/kernel/acpi_numa.c | 2 +- > arch/arm64/kernel/smp.c | 4 +- > arch/ia64/kernel/acpi.c | 14 +- > arch/x86/kernel/acpi/boot.c | 36 +- > drivers/acpi/Kconfig | 1 + > drivers/acpi/Makefile | 1 + > drivers/acpi/hmat/Kconfig | 11 + > drivers/acpi/hmat/Makefile | 1 + > drivers/acpi/hmat/hmat.c | 670 ++++++++++++++++++++++++++ > drivers/acpi/numa.c | 16 +- > drivers/acpi/scan.c | 4 +- > drivers/acpi/tables.c | 76 ++- > drivers/base/Kconfig | 8 + > drivers/base/node.c | 352 +++++++++++++- > drivers/irqchip/irq-gic-v2m.c | 2 +- > drivers/irqchip/irq-gic-v3-its-pci-msi.c | 2 +- > drivers/irqchip/irq-gic-v3-its-platform-msi.c | 2 +- > drivers/irqchip/irq-gic-v3-its.c | 6 +- > drivers/irqchip/irq-gic-v3.c | 10 +- > drivers/irqchip/irq-gic.c | 4 +- > drivers/mailbox/pcc.c | 2 +- > include/linux/acpi.h | 6 +- > include/linux/node.h | 72 ++- > 25 files changed, 1487 insertions(+), 66 deletions(-) > create mode 100644 Documentation/admin-guide/mm/numaperf.rst > create mode 100644 drivers/acpi/hmat/Kconfig > create mode 100644 drivers/acpi/hmat/Makefile > create mode 100644 drivers/acpi/hmat/hmat.c >
