From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Matt Fleming <matt@readmodwrite.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Eduard Zingerman <eddyz87@gmail.com>,
Shuah Khan <shuah@kernel.org>,
kernel-team <kernel-team@cloudflare.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
Martin KaFai Lau <martin.lau@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
Network Development <netdev@vger.kernel.org>,
Matt Fleming <mfleming@cloudflare.com>
Subject: Re: [PATCH bpf-next v4] selftests/bpf: Add LPM trie microbenchmarks
Date: Tue, 26 Aug 2025 16:49:50 -0700 [thread overview]
Message-ID: <CAADnVQ+=bYcR6whXxEPst4a4n1eKeDXp4tO8Q2wEx_6GbwqMFg@mail.gmail.com> (raw)
In-Reply-To: <20250826131158.171530-1-matt@readmodwrite.com>
On Tue, Aug 26, 2025 at 6:12 AM Matt Fleming <matt@readmodwrite.com> wrote:
>
> +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.
pw-bot: cr
next prev parent reply other threads:[~2025-08-26 23:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-26 13:11 [PATCH bpf-next v4] selftests/bpf: Add LPM trie microbenchmarks Matt Fleming
2025-08-26 23:49 ` Alexei Starovoitov [this message]
2025-08-27 11:27 ` Matt Fleming
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