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tests/avocado: s390x cpu topology polarization

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Polarization is changed on a request from the guest.
Let's verify the polarization is accordingly set by QEMU.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Message-ID: <20231016183925.2384704-17-nsg@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Pierre Morel 2023-10-16 20:39:20 +02:00 committed by Thomas Huth
parent e5bc49d54d
commit cb042c73f3
1 changed files with 45 additions and 0 deletions
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45
tests/avocado/s390_topology.py
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@ -41,6 +41,7 @@ class S390CPUTopology(QemuSystemTest):
The polarization is changed on a request from the guest.
"""
timeout = 90
event_timeout = 10
KERNEL_COMMON_COMMAND_LINE = ('printk.time=0 '
'root=/dev/ram '
@ -103,6 +104,14 @@ class S390CPUTopology(QemuSystemTest):
'-initrd', initrd_path,
'-append', kernel_command_line)
def system_init(self):
self.log.info("System init")
exec_command_and_wait_for_pattern(self,
""" mount proc -t proc /proc;
mount sys -t sysfs /sys;
cat /sys/devices/system/cpu/dispatching """,
'0')
def test_single(self):
"""
This test checks the simplest topology with a single CPU.
@ -198,3 +207,39 @@ class S390CPUTopology(QemuSystemTest):
self.check_topology(3, 1, 1, 1, 'high', False)
self.check_topology(4, 1, 1, 1, 'medium', False)
self.check_topology(5, 2, 1, 1, 'high', True)
def guest_set_dispatching(self, dispatching):
exec_command(self,
f'echo {dispatching} > /sys/devices/system/cpu/dispatching')
self.vm.event_wait('CPU_POLARIZATION_CHANGE', self.event_timeout)
exec_command_and_wait_for_pattern(self,
'cat /sys/devices/system/cpu/dispatching', dispatching)
def test_polarization(self):
"""
This test verifies that QEMU modifies the entitlement change after
several guest polarization change requests.
:avocado: tags=arch:s390x
:avocado: tags=machine:s390-ccw-virtio
"""
self.kernel_init()
self.vm.launch()
self.wait_until_booted()
self.system_init()
res = self.vm.qmp('query-s390x-cpu-polarization')
self.assertEqual(res['return']['polarization'], 'horizontal')
self.check_topology(0, 0, 0, 0, 'medium', False)
self.guest_set_dispatching('1');
res = self.vm.qmp('query-s390x-cpu-polarization')
self.assertEqual(res['return']['polarization'], 'vertical')
self.check_topology(0, 0, 0, 0, 'medium', False)
self.guest_set_dispatching('0');
res = self.vm.qmp('query-s390x-cpu-polarization')
self.assertEqual(res['return']['polarization'], 'horizontal')
self.check_topology(0, 0, 0, 0, 'medium', False)