canonical-ubuntu-qa team mailing list archive

[Po-Hsu Lin <2022905@xxxxxxxxxxxxxxxxxx>]

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 Canonical
Platform QA Team, which is subscribed to ubuntu-kernel-tests.
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