On Thu, 2015-06-11 at 08:38 -0700, Dan Williams wrote: > On Tue, Jun 9, 2015 at 4:10 PM, Toshi Kani <toshi.kani@xxxxxx> wrote: > > Since NVDIMMs are installed on memory slots, they expose the NUMA > > topology of a platform. This patchset adds support of sysfs > > 'numa_node' to I/O-related NVDIMM devices under /sys/bus/nd/devices. > > This enables numactl(8) to accept 'block:' and 'file:' paths of > > pmem and btt devices as shown in the examples below. > > numactl --preferred block:pmem0 --show > > numactl --preferred file:/dev/pmem0s --show > > > > numactl can be used to bind an application to the locality of > > a target NVDIMM for better performance. Here is a result of fio > > benchmark to ext4/dax on an HP DL380 with 2 sockets for local and > > remote settings. > > > > Local [1] : 4098.3MB/s > > Remote [2]: 3718.4MB/s > > > > [1] numactl --preferred block:pmem0 --cpunodebind block:pmem0 fio <fs-on-pmem0> > > [2] numactl --preferred block:pmem1 --cpunodebind block:pmem1 fio <fs-on-pmem0> > > > > Patch 1/3 applies on top of the acpica branch of the pm tree. > > Patch 2/3-3/3 apply on top of Dan Williams's v5 patch series of > > "libnvdimm: non-volatile memory devices". > > > > --- > > v2: > > - Add acpi_map_pxm_to_online_node(), which returns an online node. > > - Manage visibility of sysfs numa_node with is_visible. (Dan Williams) > > - Check ACPI_NFIT_PROXIMITY_VALID in spa->flags. > > > > --- > > Toshi Kani (3): > > 1/3 acpi: Add acpi_map_pxm_to_online_node() > > 2/3 libnvdimm: Set numa_node to NVDIMM devices > > 3/3 libnvdimm: Add sysfs numa_node to NVDIMM devices > > Looks good to me. Once Rafael acks the ACPI core changes I'll pull it > in to libnvdimm-for-next. Great! Thanks Dan, -Toshi -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
