Re: [PATCH v2 0/3] Add NUMA support for NVDIMM devices

Jeff Moyer
2015-06-10T15:54:40Z

Toshi Kani <toshi.kani@hp.com> writes:

> 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>

Did you post the patches to numactl somewhere?

-Jeff