Please find enclosed a patch set that introduces enhancements and new test cases to the selftests/xsk framework. These test the robustness and reliability of AF_XDP across both minimal and maximal ring size configurations. While running these tests, a bug [1] was identified when the batch size is roughly the same as the NIC ring size. This has now been addressed by Maciej's fix. [1] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=913eda2b08cc49d31f382579e2be34c2709eb789 Patch Summary: 1: Adds the definition of ethtool_ringparam to the UAPI header, a necessary step for the subsequent patches to run tests with various ring sizes. 2: Modifies the BATCH_SIZE from a constant to a variable, batch_size, to support dynamic modification at runtime for testing different hardware ring sizes. 3: Implements a function, get_hw_ring_size, to retrieve the current maximum interface size and store this information in the hw_ring structure. 4: Implements a new function, set_hw_ring_size, which allows for the dynamic configuration of the ring size within an interface. 5: Adds a new test case that puts the AF_XDP driver under stress by configuring minimal hardware and software ring sizes, verifying its functionality under constrained conditions. 6: Enhances the framework by adding a new test case that evaluates the maximum ring sizes for AF_XDP, ensuring its reliability under maximum ring utilization. Testing Strategy: Check the system in extreme scenarios, such as maximum and minimum configurations. This helps identify and fix any bugs that may occur. Tushar Vyavahare (6): tools/include: add ethtool_ringparam definition to UAPI header selftests/xsk: make batch size variable selftests/xsk: implement get_hw_ring_size function to retrieve current and max interface size selftests/xsk: implement set_hw_ring_size function to configure interface ring size selftests/xsk: test AF_XDP functionality under minimal ring configurations selftests/xsk: enhance framework with a new test case for AF_XDP under max ring sizes Signed-off-by: Tushar Vyavahare <tushar.vyavahare@xxxxxxxxx> --- tools/include/uapi/linux/ethtool.h | 41 ++++++ tools/testing/selftests/bpf/xskxceiver.c | 155 +++++++++++++++++++++-- tools/testing/selftests/bpf/xskxceiver.h | 14 +- 3 files changed, 200 insertions(+), 10 deletions(-) -- 2.34.1
