def is_bfq(self):
"""
Judge which scheduler is used, 'bfq' or 'cfq'
:return: bool, True if bfq is used, False if cfq is used
"""
first_blk = utils_disk.get_first_disk()
schedulerfd = "/sys/block/%s/queue/scheduler" % first_blk
bfq_scheduler = False
with open(schedulerfd, 'r') as iosche:
if 'bfq' in iosche.readline():
bfq_scheduler = True
return bfq_scheduler
def run(test, params, env):
"""
Test blkio tuning
1) Positive testing
1.1) get the current blkio parameters for a running/shutoff guest
1.2) set the current blkio parameters for a running/shutoff guest
2) Negative testing
2.1) get blkio parameters for a running/shutoff guest
2.2) set blkio parameters running/shutoff guest
"""
# Run test case
vm_name = params.get("main_vm")
vm = env.get_vm(vm_name)
cg = utils_cgroup.CgconfigService()
cgconfig = params.get("cgconfig", "on")
libvirtd = params.get("libvirtd", "on")
start_vm = params.get("start_vm", "yes")
status_error = params.get("status_error", "no")
change_parameters = params.get("change_parameters", "no")
original_vm_xml = libvirt_xml.VMXML.new_from_inactive_dumpxml(vm_name)
first_disk = utils_disk.get_first_disk()
schedulerfd = params.get('schedulerfd') % first_disk
params['schedulerfd'] = schedulerfd
blkio_device_weights = params.get('blkio_device_weights')
if blkio_device_weights and blkio_device_weights.count('%s'):
params['blkio_device_weights'] = params.get(
'blkio_device_weights') % first_disk
# Make sure vm is down if start not requested
if start_vm == "no" and vm and vm.is_alive():
vm.destroy()
test_dict = prepare_scheduler(params, test, vm)
# positive and negative testing
cgstop = False
try:
if start_vm == "yes" and not vm.is_alive():
vm.start()
vm.wait_for_login()
if status_error == "no":
if change_parameters == "no":
get_blkio_parameter(test, test_dict, cgstop)
else:
set_blkio_parameter(test, test_dict, cgstop)
if cgconfig == "off":
# If running, then need to shutdown a running guest before
# stopping cgconfig service and will start the guest after
# restarting libvirtd service
if cg.cgconfig_is_running():
if vm.is_alive():
vm.destroy()
cg.cgconfig_stop()
cgstop = True
# If we stopped cg, then refresh libvirtd service
# to get latest cgconfig service change; otherwise,
# if no cg change restart of libvirtd is pointless
if cgstop and libvirtd == "restart":
try:
utils_libvirtd.libvirtd_restart()
finally:
# Not running is not a good thing, but it does happen
# and it will affect other tests
if not utils_libvirtd.libvirtd_is_running():
test.fail("libvirt service is not running!")
# Recover previous running guest
if (cgconfig == "off" and libvirtd == "restart" and not vm.is_alive()
and start_vm == "yes"):
vm.start()
if status_error == "yes":
if change_parameters == "no":
get_blkio_parameter(test, test_dict, cgstop)
else:
set_blkio_parameter(test, test_dict, cgstop)
finally:
# Restore guest
original_vm_xml.sync()
with open(schedulerfd, 'w') as scf:
scf.write(test_dict['oldmode'])
# If we stopped cg, then recover and refresh libvirtd to recognize
if cgstop:
cg.cgconfig_start()
utils_libvirtd.libvirtd_restart()