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Wed, 06 Jan 2021 05:51:20 -0800 (PST) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id v11sm3251743wrt.25.2021.01.06.05.51.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jan 2021 05:51:19 -0800 (PST) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id CB17F1FF7E; Wed, 6 Jan 2021 13:51:18 +0000 (GMT) References: <20210106114159.981538-1-berrange@redhat.com> User-agent: mu4e 1.5.7; emacs 28.0.50 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: =?utf-8?Q?Daniel_P=2E_Berrang=C3=A9?= Subject: Re: [PATCH] cirrus: don't run full qtest on macOS Date: Wed, 06 Jan 2021 13:51:11 +0000 In-reply-to: <20210106114159.981538-1-berrange@redhat.com> Message-ID: <874kju2my1.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::32b; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x32b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Thomas Huth , Ed Maste , qemu-devel@nongnu.org, Li-Wen Hsu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Daniel P. Berrang=C3=A9 writes: > The Cirrus CI macOS build hosts have exhibited a serious performance > degradation in recent months. For example the "qom-test" qtest takes > over an hour for only the qemu-system-aarch64 binary. This is as much > 20-40 times slower than other environments. The other qtests all show > similar performance degradation, as do many of the unit tests. > > This does not appear related to QEMU code changes, since older git > commits which were known to fully complete in less than 1 hour on > Cirrus CI now also show similar bad performance. Either Cirrus CI > performance has degraded, or an change in its environment has exposed > a latent bug widely affecting all of QEMU. Debugging the qom-test > showed no easily identified large bottleneck - every step of the > test execution was simply slower. > > macOS builds/tests run outside Cirrus CI show normal performance. > > With an inability to identify any obvious problem, the only viable > way to get a reliably completing Cirrus CI macOS job is to cut out > almost all of the qtests. We choose to run the x86_64 target only, > since that has very few machine types and thus is least badly > impacted in the qom-test execution. > > With this change, the macOS jobs complete in approx 35 minutes. > > Signed-off-by: Daniel P. Berrang=C3=A9 Queued to testing/next, thanks. --=20 Alex Benn=C3=A9e