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
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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
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