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Saeed Mahameed
6849c6d86b
Once every napi poll cycle, check if numa node is different than the page pool's numa id, and update it using page_pool_update_nid(). Alternatively, we could have registered an irq affinity change handler, but page_pool_update_nid() must be called from napi context anyways, so the handler won't actually help. Performance testing: XDP drop/tx rate and TCP single/multi stream, on mlx5 driver while migrating rx ring irq from close to far numa: mlx5 internal page cache was locally disabled to get pure page pool results. CPU: Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz NIC: Mellanox Technologies MT27700 Family [ConnectX-4] (100G) XDP Drop/TX single core: NUMA | XDP | Before | After --------------------------------------- Close | Drop | 11 Mpps | 10.9 Mpps Far | Drop | 4.4 Mpps | 5.8 Mpps Close | TX | 6.5 Mpps | 6.5 Mpps Far | TX | 3.5 Mpps | 4 Mpps Improvement is about 30% drop packet rate, 15% tx packet rate for numa far test. No degradation for numa close tests. TCP single/multi cpu/stream: NUMA | #cpu | Before | After -------------------------------------- Close | 1 | 18 Gbps | 18 Gbps Far | 1 | 15 Gbps | 18 Gbps Close | 12 | 80 Gbps | 80 Gbps Far | 12 | 68 Gbps | 80 Gbps In all test cases we see improvement for the far numa case, and no impact on the close numa case. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.