diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2019-02-28 15:31:23 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-03-01 01:31:47 +0100 |
| commit | 51edf5f6e015c48b62e24ab2fbcad8885ca1c74e (patch) | |
| tree | f62542a11348c36a6e3ef331659a7d17f0e6806c /tools/lib/bpf/btf.h | |
| parent | 1baabdc1089eb807cdcabebad50b36c8b9895a48 (diff) | |
btf: allow to customize dedup hash table size
Default size of dedup table (16k) is good enough for most binaries, even
typical vmlinux images. But there are cases of binaries with huge amount
of BTF types (e.g., allyesconfig variants of kernel), which benefit from
having bigger dedup table size to lower amount of unnecessary hash
collisions. Tools like pahole, thus, can tune this parameter to reach
optimal performance.
This change also serves double purpose of allowing tests to force hash
collisions to test some corner cases, used in follow up patch.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib/bpf/btf.h')
| -rw-r--r-- | tools/lib/bpf/btf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index b60bb7cf5fff..28a1e1e59861 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -90,6 +90,7 @@ LIBBPF_API __u32 btf_ext__func_info_rec_size(const struct btf_ext *btf_ext); LIBBPF_API __u32 btf_ext__line_info_rec_size(const struct btf_ext *btf_ext); struct btf_dedup_opts { + unsigned int dedup_table_size; bool dont_resolve_fwds; }; |