Public bug reported: kvmclock_test test in ubuntu_kvm_unit_test will fail with J-realtime on openstack amd64 instance. This issue can be seen after we start testing on openstack with 5.15.0-1036.39 in sru-20230320.
Test log: Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/kvmclock_test' BUILD_HEAD=d8edb59a timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=tcg -kernel /tmp/tmp.iHaGzFDKoX -smp 2 --append 10000000 1685680818 # -initrd /tmp/tmp.9rLek97D5m enabling apic enabling apic smp: waiting for 1 APs setup: CPU 1 online kvm-clock: cpu 0, msr 0x51241c kvm-clock: cpu 1, msr 0x51243c Wallclock test, threshold 5 Seconds get from host: 1685680818 Raw nanoseconds value from kvmclock: 0 (cpu 0) Seconds get from kvmclock: 0 (cpu 0, offset: -1685680818) offset too large! Raw nanoseconds value from kvmclock: 0 (cpu 1) Seconds get from kvmclock: 0 (cpu 1, offset: -1685680818) offset too large! Check the stability of raw cycle ... Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 19997725 Worst warp: 0 Raw cycle is stable Monotonic cycle test: Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 19999698 Worst warp: 0 Measure the performance of raw cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 6497213250 Measure the performance of adjusted cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 10223372850 FAIL kvmclock_test This issue still exist with the latest upstream kvm-unit-tests code (02d8befe99f8) It's worthy to note that this test has passed with j/ibm on openstack amd64. ** Affects: ubuntu-kernel-tests Importance: Undecided Status: New ** Affects: linux-realtime (Ubuntu) Importance: Undecided Status: New ** Tags: 5.15 amd64 jammy realtime sru-20230320 sru-20230417 sru-20230515 ** Also affects: linux-realtime (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-realtime in Ubuntu. https://bugs.launchpad.net/bugs/2022905 Title: kvmclock_test in ubuntu_kvm_unit_test failed with "offset too large!" with J-realtime on openstack AMD64 Status in ubuntu-kernel-tests: New Status in linux-realtime package in Ubuntu: New Bug description: kvmclock_test test in ubuntu_kvm_unit_test will fail with J-realtime on openstack amd64 instance. This issue can be seen after we start testing on openstack with 5.15.0-1036.39 in sru-20230320. Test log: Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/kvmclock_test' BUILD_HEAD=d8edb59a timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=tcg -kernel /tmp/tmp.iHaGzFDKoX -smp 2 --append 10000000 1685680818 # -initrd /tmp/tmp.9rLek97D5m enabling apic enabling apic smp: waiting for 1 APs setup: CPU 1 online kvm-clock: cpu 0, msr 0x51241c kvm-clock: cpu 1, msr 0x51243c Wallclock test, threshold 5 Seconds get from host: 1685680818 Raw nanoseconds value from kvmclock: 0 (cpu 0) Seconds get from kvmclock: 0 (cpu 0, offset: -1685680818) offset too large! Raw nanoseconds value from kvmclock: 0 (cpu 1) Seconds get from kvmclock: 0 (cpu 1, offset: -1685680818) offset too large! Check the stability of raw cycle ... Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 19997725 Worst warp: 0 Raw cycle is stable Monotonic cycle test: Total vcpus: 2 Test loops: 10000000 Total warps: 0 Total stalls: 19999698 Worst warp: 0 Measure the performance of raw cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 6497213250 Measure the performance of adjusted cycle ... Total vcpus: 2 Test loops: 10000000 TSC cycles: 10223372850 FAIL kvmclock_test This issue still exist with the latest upstream kvm-unit-tests code (02d8befe99f8) It's worthy to note that this test has passed with j/ibm on openstack amd64. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2022905/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp