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virtio_mem_hugetlb_migration: adds new test case
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Creates a new test case for performing a live migration
of a VM with a virtio-mem device that consumes hugepages

Signed-off-by: mcasquer <[email protected]>
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mcasquer committed Aug 13, 2024
1 parent 68e3565 commit 909a7d1
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36 changes: 36 additions & 0 deletions qemu/tests/cfg/virtio_mem_hugetlb_migration.cfg
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- virtio_mem_hugetlb_migration:
only Linux
no Host_RHEL.m6 Host_RHEL.m7 Host_RHEL.m8 Host_RHEL.m9.u0 Host_RHEL.m9.u1 Host_RHEL.m9.u2 Host_RHEL.m9.u3
no RHEL.6 RHEL.7 RHEL.8
no s390x
type = virtio_mem_hugetlb_migration
virt_test_type = qemu
smp = 8
vcpu_maxcpus = ${smp}
threshold = 0.025
slots_mem = 20
maxmem_mem = 80G
mem = 8192
setup_hugepages = yes
mem_devs = 'mem0 vmem0'
backend_mem_vmem0 = memory-backend-file
mem-path_vmem0 = /mnt/kvm_hugepage
vm_memdev_model_vmem0 = "virtio-mem"
reserve_vmem0 = no
guest_numa_nodes = 'node0'
numa_memdev_node0 = mem-mem0
numa_cpus_node0 = "0-7"
size_mem_mem0 = 8G
use_mem_mem0 = no
size_mem_vmem0 = 8G
use_mem_vmem0 = yes
requested-size_memory_vmem0 = 1G
node_memory_vmem0 = "0"
memdev_memory_vmem0 = "mem-vmem0"
prealloc_memory_vmem0 = yes
kernel_extra_params_add = "memhp_default_state=online_movable"
pcie_extra_root_port = 0
requested-size_test_vmem0 = "4G"
kill_vm_on_error = yes
mig_timeout = 1200
migration_protocol = "tcp"
58 changes: 58 additions & 0 deletions qemu/tests/virtio_mem_hugetlb_migration.py
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import time

from avocado.utils import process

from virttest import error_context

from virttest.utils_misc import normalize_data_size
from provider import virtio_mem_utils


@error_context.context_aware
def run(test, params, env):
"""
Do migration of a virtio-mem device consuming hugepages
1) Setup hugepages in source and destination hosts
2) Boot VMs in source and destination hosts
3) Do migration
4) Check virtio-mem device
5) Resize virtio-mem devices to a different value
6) Check virtio-mem device
:param test: QEMU test object
:param params: Dictionary with the test parameters
:param env: Dictionary with test environment
"""

vm = env.get_vm(params["main_vm"])
vm.verify_alive()
vm.wait_for_login()
threshold = params.get_numeric("threshold", target_type=float)
mem_object_id = params["mem_devs"].split().pop()
mem = params.get_numeric("mem")
initial_req_size = params.get("requested-size_memory_%s" % mem_object_id)
requested_size_vmem = params.get("requested-size_test_%s" % mem_object_id)
device_id = "virtio_mem-%s" % mem_object_id
node_id = params.get_numeric("node_memory_%s" % mem_object_id)
process.system("echo %d > /proc/sys/vm/nr_hugepages" % mem, shell=True)

mig_timeout = params.get_numeric("mig_timeout", 1200, float)
mig_protocol = params.get("migration_protocol", "tcp")
vm.migrate(mig_timeout, mig_protocol, env=env)

virtio_mem_utils.check_memory_devices(
device_id, initial_req_size, threshold, vm, test
)
virtio_mem_utils.check_numa_plugged_mem(
node_id, initial_req_size, threshold, vm, test
)

req_size_normalized = int(float(normalize_data_size(requested_size_vmem, "B")))
vm.monitor.qom_set(device_id, "requested-size", req_size_normalized)
time.sleep(10)
virtio_mem_utils.check_memory_devices(
device_id, requested_size_vmem, threshold, vm, test
)
virtio_mem_utils.check_numa_plugged_mem(
node_id, requested_size_vmem, threshold, vm, test
)

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