Improve the performance of BTF type lookups with binary search #6392
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added 7 commits
November 18, 2025 19:27
Introduce btf__permute() API to allow in-place rearrangement of BTF types. This function reorganizes BTF type order according to a provided array of type IDs, updating all type references to maintain consistency. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
This patch introduces test cases for the btf__permute function to ensure it works correctly with both base BTF and split BTF scenarios. The test suite includes: - test_permute_base: Validates permutation on base BTF - test_permute_split: Tests permutation on split BTF - test_permute_drop_base: Validates type dropping on base BTF - test_permute_drop_split: Tests type dropping on split BTF - test_permute_drop_dedup: Tests type dropping and deduping Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
This patch introduces a new --btf_sort option that leverages libbpf's btf__permute interface to reorganize BTF layout. The implementation sorts BTF types by name in ascending order, placing anonymous types at the end to enable efficient binary search lookup. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
This patch introduces binary search optimization for BTF type lookups when the BTF instance contains sorted types. The optimization significantly improves performance when searching for types in large BTF instances with sorted type names. For unsorted BTF or when nr_sorted_types is zero, the implementation falls back to the original linear search algorithm. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
…ization This patch adds validation to verify BTF type name sorting, enabling binary search optimization for lookups. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
Improve btf_find_by_name_kind() performance by adding binary search support for sorted types. Falls back to linear search for compatibility. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
Implement validation of BTF type ordering to enable efficient binary search for sorted BTF. Cc: Eduard Zingerman <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Alan Maguire <[email protected]> Cc: Song Liu <[email protected]> Cc: Xiaoqin Zhang <[email protected]> Signed-off-by: Donglin Peng <[email protected]>
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Upstream branch: d6ec090 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1025100 expired. Closing PR. |
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Pull request for series with
subject: Improve the performance of BTF type lookups with binary search
version: 7
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1025100