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Fri, 16 Oct 2026 09:05:39 -0700 (PDT) Content-Type: text/plain; charset=UTF-8 Date: Fri, 16 Oct 2026 16:05:38 +0000 Message-Id: Cc: , , Subject: Re: [PATCH bpf-next] selftests/bpf: Run tc_edt serially From: "Alexei Starovoitov" To: "Qiliang Yuan" , "Daniel Borkmann" , "Andrii Nakryiko" , "Eduard Zingerman" , "Kumar Kartikeya Dwivedi" , "Martin KaFai Lau" , "Song Liu" , "Yonghong Song" , "Jiri Olsa" , "Emil Tsalapatis" , "Ihor Solodrai" , "Shuah Khan" , =?utf-8?q?Alexis_Lothor=C3=A9?= In-Reply-To: <20261009-selftests-bpf-tc-edt-serial-v1-1-f72e045f2465@gmail.com> References: <20261009-selftests-bpf-tc-edt-serial-v1-1-f72e045f2465@gmail.com> X-Mailer: mkdraft (claude review draft; edit before sending) Content-Transfer-Encoding: 8bit Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, Oct 09, 2026 at 09:50 AM Qiliang Yuan wrote: > The measured time includes the time the sender and the receiver take to > run. When test_progs runs other tests in parallel, the sender and the > receiver compete with those for the CPUs, the transfer takes longer, > and the measured rate falls outside of the 2% margin. The test is flaky without -j too. It's in DENYLIST.s390x in CI since Dec 2025: https://github.com/kernel-patches/vmtest/pull/418 and it fails on x86 with ASAN: https://github.com/kernel-patches/vmtest/issues/503 Both jobs run test_progs without -j. serial_ won't help there. pw-bot: cr