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[83.52.54.37]) by smtp.gmail.com with ESMTPSA id e6sm358282wrn.29.2020.03.18.15.27.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Mar 2020 15:27:37 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH-for-5.0 v2 3/4] tests/migration: Reduce autoconverge initial bandwidth Date: Wed, 18 Mar 2020 23:27:16 +0100 Message-Id: <20200318222717.24676-4-philmd@redhat.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200318222717.24676-1-philmd@redhat.com> References: <20200318222717.24676-1-philmd@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8; text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 63.128.21.74 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: Fam Zheng , Laurent Vivier , Thomas Huth , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Juan Quintela , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cornelia Huck , "Dr. David Alan Gilbert" , Peter Xu , Halil Pasic , Christian Borntraeger , qemu-s390x@nongnu.org, Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When using max-bandwidth=3D~100Mb/s, this test fails on Travis-CI s390x when configured with --disable-tcg: $ make check-qtest TEST check-qtest-s390x: tests/qtest/boot-serial-test qemu-system-s390x: -accel tcg: invalid accelerator tcg qemu-system-s390x: falling back to KVM TEST check-qtest-s390x: tests/qtest/pxe-test TEST check-qtest-s390x: tests/qtest/test-netfilter TEST check-qtest-s390x: tests/qtest/test-filter-mirror TEST check-qtest-s390x: tests/qtest/test-filter-redirector TEST check-qtest-s390x: tests/qtest/drive_del-test TEST check-qtest-s390x: tests/qtest/device-plug-test TEST check-qtest-s390x: tests/qtest/virtio-ccw-test TEST check-qtest-s390x: tests/qtest/cpu-plug-test TEST check-qtest-s390x: tests/qtest/migration-test ** ERROR:tests/qtest/migration-test.c:1229:test_migrate_auto_converge: 'got_= stop' should be FALSE ERROR - Bail out! ERROR:tests/qtest/migration-test.c:1229:test_migrate_au= to_converge: 'got_stop' should be FALSE make: *** [tests/Makefile.include:633: check-qtest-s390x] Error 1 Per David Gilbert, "it could just be the writing is slow on s390 and the migration thread fast; in which case the autocomplete wouldn't be needed. Perhaps we just need to reduce the bandwidth limit." Tuning the threshold by reducing the initial bandwidth makes the autoconverge test pass. Suggested-by: Dr. David Alan Gilbert Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- tests/qtest/migration-test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index 3d6cc83b88..727a97cf87 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -1211,7 +1211,7 @@ static void test_migrate_auto_converge(void) * without throttling. */ migrate_set_parameter_int(from, "downtime-limit", 1); - migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb= /s */ + migrate_set_parameter_int(from, "max-bandwidth", 10000000000); /* ~10G= b/s */ =20 /* To check remaining size after precopy */ migrate_set_capability(from, "pause-before-switchover", true); --=20 2.21.1