Support to optimize page placement via NUMA balancing among bound nodes #104
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
In Linux kernel v5.12, a new mode flag MPOL_F_NUMA_BALANCING is added
to set_mempolicy() to optimize the page placement among the NUMA nodes
with the NUMA balancing mechanism even if the memory of the
applications are bound with MPOL_BIND. For details about kernel
change, please refer to commit bda420b98505 ("numa balancing: migrate
on fault among multiple bound nodes"). This patch adds the
corresponding support to libnuma and numactl.
A new API: numa_set_membind_balancing() is added to libnuma. It is
same as numa_set_membind() except that the Linux kernel NUMA balancing
will be enabled for the task if the feature is supported by the
kernel.
At the same time, a new option: --balancing (-b) is added to numactl.
Which can be used before the --membind/-m memory policy in the command
line. With it, the Linux kernel NUMA balancing will be enabled for
the process if --membind/-m is used and the feature is supported by
the kernel.
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
|
Thanks. Merged. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
In Linux kernel v5.12, a new mode flag MPOL_F_NUMA_BALANCING is added
to set_mempolicy() to optimize the page placement among the NUMA nodes
with the NUMA balancing mechanism even if the memory of the
applications are bound with MPOL_BIND. For details about kernel
change, please refer to commit bda420b98505 ("numa balancing: migrate
on fault among multiple bound nodes"). This patch adds the
corresponding support to libnuma and numactl.
A new API: numa_set_membind_balancing() is added to libnuma. It is
same as numa_set_membind() except that the Linux kernel NUMA balancing
will be enabled for the task if the feature is supported by the
kernel.
At the same time, a new option: --balancing (-b) is added to numactl.
Which can be used before the --membind/-m memory policy in the command
line. With it, the Linux kernel NUMA balancing will be enabled for
the process if --membind/-m is used and the feature is supported by
the kernel.
Signed-off-by: "Huang, Ying" ying.huang@intel.com