Re: [PATCH bpf-next v4] selftests/bpf: Add LPM trie microbenchmarks

On Wed, Aug 27, 2025 at 12:50 AM Alexei Starovoitov
[off-list ref] wrote:

On Tue, Aug 26, 2025 at 6:12 AM Matt Fleming [off-list ref] wrote:

quoted

+static int baseline(__u32 index, __u32 *unused)
+{
+       struct trie_key key;
+       __s64 blackbox;
+
+       generate_key(&key);
+       /* Avoid compiler optimizing out the modulo */
+       barrier_var(blackbox);
+       blackbox = READ_ONCE(key.data);

Overall looks good, but gcc-bpf found an actual issue.

Thanks. I'll submit a v5 with a fix shortly.