def check_vcpupin(vm_name, vcpu, cpu_list, pid, vcpu_pid):
"""
This function checks the actual and the expected affinity of given vcpu
and raises error if not matchs
:param vm_name: VM Name to operate on
:param vcpu: vcpu number for which the affinity is required
:param cpu: cpu details for the affinity
:param pid: VM pid
:param vcpu: VM cpu pid
"""
total_cpu = process.run(
"ls -d /sys/devices/system/cpu/cpu[0-9]* |wc -l",
shell=True).stdout_text.strip()
logging.debug("Debug: cpulist %s", cpu_list)
expected_output = cpu.cpus_string_to_affinity_list(
cpu_list, int(total_cpu))
logging.debug("Expected affinity: %s", expected_output)
# Check for affinity value from vcpuinfo output
actual_output = affinity_from_vcpuinfo(vm_name, vcpu)
logging.debug("Actual affinity in vcpuinfo output: %s", actual_output)
if expected_output == actual_output:
logging.info("successfully pinned cpu_list: %s --> vcpu: %s",
cpu_list, vcpu)
else:
test.fail("Cpu pinning details not updated properly in"
" virsh vcpuinfo command output")
# Check for affinity value from vcpupin output
actual_output_vcpupin = affinity_from_vcpupin(vm_name, vcpu)
logging.debug("Actual affinity in vcpupin output: %s",
actual_output_vcpupin)
if expected_output == actual_output_vcpupin:
logging.info("successfully pinned cpu_list: %s --> vcpu: %s",
cpu_list, vcpu)
else:
test.fail("Cpu pinning details not updated properly in"
" virsh vcpupin command output")
if pid is None:
return
# Get the actual cpu affinity value in the proc entry
output = utils_test.libvirt.cpu_allowed_list_by_task(pid, vcpu_pid)
actual_output_proc = cpu.cpus_string_to_affinity_list(
output, int(total_cpu))
logging.debug("Actual affinity in guest proc: %s", actual_output_proc)
if expected_output == actual_output_proc:
logging.info(
"successfully pinned vcpu: %s --> cpu: %s"
" in respective proc entry", vcpu, cpu_list)
else:
test.fail("Cpu pinning details are not "
"updated properly in /proc/"
"%s/task/%s/status" % (pid, vcpu_pid))
def check_vcpu_affinity():
"""
check vcpu affinity defined by vcpu cpuset or cputune cpuset
"""
affinity = vcpu_cpuset if not cputune_cpuset else cputune_cpuset
affinity = {vcpu: affinity}
virsh.vcpuinfo(vm_name, debug=True)
host_cpu_count = cpuutil.total_cpus_count()
vmxml_live = vm_xml.VMXML.new_from_dumpxml(vm_name)
logging.debug(vmxml_live)
# if vcpu >= maxvcpu, the cputune should not exist in xml
if int(vcpu) >= int(maxvcpu):
try:
if hasattr(vmxml_live, 'cputune'):
test.fail("cputune tag is set when vcpu >= maxvcpu")
except xcepts.LibvirtXMLError:
pass
elif "config" in vcpupin_option:
vcpu_affinity = cpu.affinity_from_vcpupin(vm, vcpu, vcpupin_option)
affinity = cpu.cpus_string_to_affinity_list(
str(affinity[vcpu]), host_cpu_count)
logging.debug("vcpu_affinity {}".format(vcpu_affinity))
logging.debug("affinity {}".format(affinity))
if vcpu_affinity[int(vcpu)] != affinity:
test.fail("vcpu affinity check fail")
# check the expected vcpu affinity with the one got from running vm
elif not cpu.check_affinity(vm, affinity):
test.fail("vcpu affinity check fail")
def affinity_from_vcpupin(vm_name, vcpu):
"""
This function returns list of vcpu's affinity from vcpupin output
:param vm_name: VM Name
:param vcpu: VM cpu pid
:return : list of affinity to vcpus
"""
total_cpu = process.run("ls -d /sys/devices/system/cpu/cpu[0-9]* |wc -l", shell=True).stdout_text.strip()
vcpus_affinity = {}
output = virsh.vcpupin(vm_name).stdout
for item in output.split('\n')[2:-2]:
item = item.strip()
split_key = ' '
if ':' in item:
split_key = ':'
vcpus_affinity[item.split(split_key)[0].strip()] = item.split(split_key)[-1].strip()
return cpu.cpus_string_to_affinity_list(
vcpus_affinity[str(vcpu)], int(total_cpu))