def test_assign_pid(self, lib):
"Tests assign_pid() method."
def pqos_alloc_assign_pid_m(mask, pid_array, pid_array_len,
class_id_ref):
"Mock pqos_alloc_assign_pid()."
l2ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L2CA
l3ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L3CA
expected_mask = l2ca_mask | l3ca_mask
self.assertEqual(mask, expected_mask)
self.assertEqual(pid_array_len, 4)
self.assertEqual(pid_array[0], 1000)
self.assertEqual(pid_array[1], 1200)
self.assertEqual(pid_array[2], 2300)
self.assertEqual(pid_array[3], 5000)
ctypes_ref_set_uint(class_id_ref, 3)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_assign_pid_m)
lib.pqos_alloc_assign_pid = func_mock
alloc = PqosAlloc()
class_id = alloc.assign_pid(['l2ca', 'l3ca'], [1000, 1200, 2300, 5000])
lib.pqos_alloc_assign_pid.assert_called_once()
self.assertEqual(class_id, 3)
def test_get_pids(self, lib):
"Tests get_pids() method."
pids_uint = [ctypes.c_uint(pid) for pid in [1000, 1500, 3000, 5600]]
pid_array = ctypes_build_array(pids_uint)
def pqos_pid_get_pid_assoc_m(class_id, count_ref):
"Mock pqos_pid_get_pid_assoc()."
self.assertEqual(class_id, 7)
ctypes_ref_set_uint(count_ref, len(pid_array))
return ctypes.cast(pid_array, ctypes.POINTER(ctypes.c_uint))
func_mock = MagicMock(side_effect=pqos_pid_get_pid_assoc_m)
lib.pqos_pid_get_pid_assoc = func_mock
alloc = PqosAlloc()
with patch('pqos.allocation.free_memory'):
pids = alloc.get_pids(7)
lib.pqos_pid_get_pid_assoc.assert_called_once()
self.assertEqual(len(pids), 4)
self.assertEqual(pids[0], 1000)
self.assertEqual(pids[1], 1500)
self.assertEqual(pids[2], 3000)
self.assertEqual(pids[3], 5600)
def test_assign(self, lib):
"Tests assign() method."
def pqos_alloc_assign_m(mask, core_array, core_array_len, class_id_ref):
"Mock pqos_alloc_assign()."
mba_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_MBA
l3ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L3CA
expected_mask = mba_mask | l3ca_mask
self.assertEqual(mask, expected_mask)
self.assertEqual(core_array_len, 4)
self.assertEqual(core_array[0], 1)
self.assertEqual(core_array[1], 2)
self.assertEqual(core_array[2], 4)
self.assertEqual(core_array[3], 7)
ctypes_ref_set_uint(class_id_ref, 3)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_assign_m)
lib.pqos_alloc_assign = func_mock
alloc = PqosAlloc()
class_id = alloc.assign(['mba', 'l3ca'], [1, 2, 4, 7])
lib.pqos_alloc_assign.assert_called_once()
self.assertEqual(class_id, 3)
def test_assign(self, lib):
"Tests assign() method."
def pqos_alloc_assign_m(mask, core_array, core_array_len,
class_id_ref):
"Mock pqos_alloc_assign()."
mba_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_MBA
l3ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L3CA
expected_mask = mba_mask | l3ca_mask
self.assertEqual(mask, expected_mask)
self.assertEqual(core_array_len, 4)
self.assertEqual(core_array[0], 1)
self.assertEqual(core_array[1], 2)
self.assertEqual(core_array[2], 4)
self.assertEqual(core_array[3], 7)
ctypes_ref_set_uint(class_id_ref, 3)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_assign_m)
lib.pqos_alloc_assign = func_mock
alloc = PqosAlloc()
class_id = alloc.assign(['mba', 'l3ca'], [1, 2, 4, 7])
lib.pqos_alloc_assign.assert_called_once()
self.assertEqual(class_id, 3)
def test_assign_pid(self, lib):
"Tests assign_pid() method."
def pqos_alloc_assign_pid_m(mask, pid_array, pid_array_len,
class_id_ref):
"Mock pqos_alloc_assign_pid()."
l2ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L2CA
l3ca_mask = 1 << CPqosCapability.PQOS_CAP_TYPE_L3CA
expected_mask = l2ca_mask | l3ca_mask
self.assertEqual(mask, expected_mask)
self.assertEqual(pid_array_len, 4)
self.assertEqual(pid_array[0], 1000)
self.assertEqual(pid_array[1], 1200)
self.assertEqual(pid_array[2], 2300)
self.assertEqual(pid_array[3], 5000)
ctypes_ref_set_uint(class_id_ref, 3)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_assign_pid_m)
lib.pqos_alloc_assign_pid = func_mock
alloc = PqosAlloc()
class_id = alloc.assign_pid(['l2ca', 'l3ca'], [1000, 1200, 2300, 5000])
lib.pqos_alloc_assign_pid.assert_called_once()
self.assertEqual(class_id, 3)
def test_get_pids(self, lib):
"Tests get_pids() method."
pids_uint = [ctypes.c_uint(pid) for pid in [1000, 1500, 3000, 5600]]
pid_array = ctypes_build_array(pids_uint)
def pqos_pid_get_pid_assoc_m(class_id, count_ref):
"Mock pqos_pid_get_pid_assoc()."
self.assertEqual(class_id, 7)
ctypes_ref_set_uint(count_ref, len(pid_array))
return ctypes.cast(pid_array, ctypes.POINTER(ctypes.c_uint))
func_mock = MagicMock(side_effect=pqos_pid_get_pid_assoc_m)
lib.pqos_pid_get_pid_assoc = func_mock
alloc = PqosAlloc()
with patch('pqos.allocation.free_memory'):
pids = alloc.get_pids(7)
lib.pqos_pid_get_pid_assoc.assert_called_once()
self.assertEqual(len(pids), 4)
self.assertEqual(pids[0], 1000)
self.assertEqual(pids[1], 1500)
self.assertEqual(pids[2], 3000)
self.assertEqual(pids[3], 5600)
def test_assoc_set_pid(self, lib):
"Tests assoc_set_pid() method."
# pylint: disable=no-self-use
lib.pqos_alloc_assoc_set_pid = MagicMock(return_value=0)
alloc = PqosAlloc()
alloc.assoc_set_pid(2, 1)
lib.pqos_alloc_assoc_set_pid.assert_called_once_with(2, 1)
def test_assoc_set_pid(self, lib):
"Tests assoc_set_pid() method."
# pylint: disable=no-self-use
lib.pqos_alloc_assoc_set_pid = MagicMock(return_value=0)
alloc = PqosAlloc()
alloc.assoc_set_pid(2, 1)
lib.pqos_alloc_assoc_set_pid.assert_called_once_with(2, 1)
def reset_allocation():
"""
Resets allocation configuration.
"""
alloc = PqosAlloc()
try:
alloc.reset('any', 'any', 'any')
print("Allocation reset successful")
except:
print("Allocation reset failed!")
def init(self, iface, force_iface=False):
"""
Initializes libpqos
Returns:
0 on success
-1 otherwise
"""
if not force_iface and not iface in self.supported_iface():
log.error("RDT does not support '%s' interface!" % (iface))
return -1
# deinitialize lib first
if self.shared_dict['current_iface']:
self.fini()
# umount restcrl to improve caps detection
if platform.system() == 'FreeBSD':
result = os.system(
"/sbin/umount -a -t resctrl") # nosec - string literal
else:
result = os.system(
"/bin/umount -a -t resctrl") # nosec - string literal
if result:
log.error("Failed to umount resctrl fs! status code: %d"\
% (os.WEXITSTATUS(result)))
return -1
# attempt to initialize libpqos
try:
self.pqos.init(iface.upper())
self.cap = PqosCap()
self.l3ca = PqosCatL3()
self.mba = PqosMba()
self.alloc = PqosAlloc()
self.cpuinfo = PqosCpuInfo()
except Exception as ex:
log.error(str(ex))
return -1
# save current interface type in shared dict
self.shared_dict['current_iface'] = iface
# Reread MBA BW status from libpqos
self.refresh_mba_bw_status()
return 0
def set_allocation_class(class_id, cores):
"""
Sets up allocation classes of service on selected CPUs
Parameters:
class_id: class of service ID
cores: a list of cores
"""
alloc = PqosAlloc()
for core in cores:
try:
alloc.assoc_set(core, class_id)
except:
print("Setting allocation class of service association failed!")
def test_assoc_get(self, lib):
"Tests assoc_get() method."
def pqos_allc_assoc_get_m(core, class_id_ref):
"Mock pqos_alloc_assoc_get()."
self.assertEqual(core, 2)
ctypes_ref_set_uint(class_id_ref, 5)
return 0
lib.pqos_alloc_assoc_get = MagicMock(side_effect=pqos_allc_assoc_get_m)
alloc = PqosAlloc()
class_id = alloc.assoc_get(2)
lib.pqos_alloc_assoc_get.assert_called_once()
self.assertEqual(class_id, 5)
def test_assoc_get(self, lib):
"Tests assoc_get() method."
def pqos_allc_assoc_get_m(core, class_id_ref):
"Mock pqos_alloc_assoc_get()."
self.assertEqual(core, 2)
ctypes_ref_set_uint(class_id_ref, 5)
return 0
lib.pqos_alloc_assoc_get = MagicMock(side_effect=pqos_allc_assoc_get_m)
alloc = PqosAlloc()
class_id = alloc.assoc_get(2)
lib.pqos_alloc_assoc_get.assert_called_once()
self.assertEqual(class_id, 5)
def test_assoc_get_pid(self, lib):
"Tests assoc_get_pid() method."
def pqos_allc_assoc_get_pid_m(pid, class_id_ref):
"Mock pqos_alloc_assoc_get_pid()."
self.assertEqual(pid, 200)
ctypes_ref_set_uint(class_id_ref, 1)
return 0
func_mock = MagicMock(side_effect=pqos_allc_assoc_get_pid_m)
lib.pqos_alloc_assoc_get_pid = func_mock
alloc = PqosAlloc()
class_id = alloc.assoc_get_pid(200)
lib.pqos_alloc_assoc_get_pid.assert_called_once()
self.assertEqual(class_id, 1)
def test_assoc_get_pid(self, lib):
"Tests assoc_get_pid() method."
def pqos_allc_assoc_get_pid_m(pid, class_id_ref):
"Mock pqos_alloc_assoc_get_pid()."
self.assertEqual(pid, 200)
ctypes_ref_set_uint(class_id_ref, 1)
return 0
func_mock = MagicMock(side_effect=pqos_allc_assoc_get_pid_m)
lib.pqos_alloc_assoc_get_pid = func_mock
alloc = PqosAlloc()
class_id = alloc.assoc_get_pid(200)
lib.pqos_alloc_assoc_get_pid.assert_called_once()
self.assertEqual(class_id, 1)
def test_reset(self, lib):
"Tests reset() method."
def pqos_alloc_reset_m(l3_cdp_cfg, l2_cdp_cfg, mba_cfg):
"Mock pqos_alloc_reset()."
self.assertEqual(l3_cdp_cfg, 1)
self.assertEqual(l2_cdp_cfg, 2)
self.assertEqual(mba_cfg, 2)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_reset_m)
lib.pqos_alloc_reset = func_mock
alloc = PqosAlloc()
alloc.reset('on', 'any', 'ctrl')
lib.pqos_alloc_reset.assert_called_once()
def test_reset(self, lib):
"Tests reset() method."
def pqos_alloc_reset_m(l3_cdp_cfg, l2_cdp_cfg, mba_cfg):
"Mock pqos_alloc_reset()."
self.assertEqual(l3_cdp_cfg, 1)
self.assertEqual(l2_cdp_cfg, 2)
self.assertEqual(mba_cfg, 2)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_reset_m)
lib.pqos_alloc_reset = func_mock
alloc = PqosAlloc()
alloc.reset('on', 'any', 'ctrl')
lib.pqos_alloc_reset.assert_called_once()
def test_release(self, lib):
"Tests release() method."
def pqos_alloc_release_m(core_array, core_array_len):
"Mock pqos_alloc_release()."
self.assertEqual(core_array_len, 3)
self.assertEqual(core_array[0], 2)
self.assertEqual(core_array[1], 3)
self.assertEqual(core_array[2], 5)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_release_m)
lib.pqos_alloc_release = func_mock
alloc = PqosAlloc()
alloc.release([2, 3, 5])
lib.pqos_alloc_release.assert_called_once()
def test_release(self, lib):
"Tests release() method."
def pqos_alloc_release_m(core_array, core_array_len):
"Mock pqos_alloc_release()."
self.assertEqual(core_array_len, 3)
self.assertEqual(core_array[0], 2)
self.assertEqual(core_array[1], 3)
self.assertEqual(core_array[2], 5)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_release_m)
lib.pqos_alloc_release = func_mock
alloc = PqosAlloc()
alloc.release([2, 3, 5])
lib.pqos_alloc_release.assert_called_once()
def test_release_pid(self, lib):
"Tests release_pid() method."
def pqos_alloc_release_pid_m(pid_array, pid_array_len):
"Mock pqos_alloc_release_pid()."
self.assertEqual(pid_array_len, 4)
self.assertEqual(pid_array[0], 1234)
self.assertEqual(pid_array[1], 5432)
self.assertEqual(pid_array[2], 7568)
self.assertEqual(pid_array[3], 4545)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_release_pid_m)
lib.pqos_alloc_release_pid = func_mock
alloc = PqosAlloc()
alloc.release_pid([1234, 5432, 7568, 4545])
lib.pqos_alloc_release_pid.assert_called_once()
def init(self):
"""
Initializes libpqos
Returns:
0 on success
-1 otherwise
"""
try:
self.pqos.init('MSR')
self.cap = PqosCap()
self.l3ca = PqosCatL3()
self.mba = PqosMba()
self.alloc = PqosAlloc()
self.cpuinfo = PqosCpuInfo()
except Exception as ex:
log.error(str(ex))
return -1
return 0
def test_release_pid(self, lib):
"Tests release_pid() method."
def pqos_alloc_release_pid_m(pid_array, pid_array_len):
"Mock pqos_alloc_release_pid()."
self.assertEqual(pid_array_len, 4)
self.assertEqual(pid_array[0], 1234)
self.assertEqual(pid_array[1], 5432)
self.assertEqual(pid_array[2], 7568)
self.assertEqual(pid_array[3], 4545)
return 0
func_mock = MagicMock(side_effect=pqos_alloc_release_pid_m)
lib.pqos_alloc_release_pid = func_mock
alloc = PqosAlloc()
alloc.release_pid([1234, 5432, 7568, 4545])
lib.pqos_alloc_release_pid.assert_called_once()
def print_allocation_config():
"""
Prints allocation configuration.
"""
l3ca = PqosCatL3()
alloc = PqosAlloc()
cpuinfo = PqosCpuInfo()
sockets = cpuinfo.get_sockets()
for socket in sockets:
try:
coses = l3ca.get(socket)
print("L3CA COS definitions for Socket %u:" % socket)
for cos in coses:
cos_params = (cos.class_id, cos.mask)
print(" L3CA COS%u => MASK 0x%x" % cos_params)
except:
print("Error")
raise
for socket in sockets:
try:
print("Core information for socket %u:" % socket)
cores = cpuinfo.get_cores(socket)
for core in cores:
class_id = alloc.assoc_get(core)
try:
print(" Core %u => COS%u" % (core, class_id))
except:
print(" Core %u => ERROR" % core)
except:
print("Error")
raise
def print_allocation_config():
"""
Prints allocation configuration.
"""
alloc = PqosAlloc()
cpuinfo = PqosCpuInfo()
sockets = cpuinfo.get_sockets()
for socket in sockets:
try:
print("Core information for socket %u:" % socket)
cores = cpuinfo.get_cores(socket)
for core in cores:
class_id = alloc.assoc_get(core)
try:
print(" Core %u => COS%u" % (core, class_id))
except:
print(" Core %u => ERROR" % core)
except:
print("Error")
raise
class PqosApi:
# pylint: disable=too-many-instance-attributes
"""
Wrapper for libpqos wrapper.
"""
def __init__(self):
self.pqos = Pqos()
self.cap = None
self.l3ca = None
self.mba = None
self.alloc = None
self.cpuinfo = None
self._supported_iface = []
# dict to share interface type and MBA BW status
# between REST API process and "backend"
self.shared_dict = common.MANAGER.dict()
self.shared_dict['current_iface'] = None
self.shared_dict['mba_bw_supported'] = None
self.shared_dict['mba_bw_enabled'] = None
def detect_supported_ifaces(self):
"""
Detects supported RDT interfaces
"""
for iface in ["msr", "os"]:
if not self.init(iface, True):
log.info("Interface %s, MBA BW: %ssupported."\
% (iface.upper(), "un" if not self.is_mba_bw_supported() else ""))
self.fini()
self._supported_iface.append(iface)
log.info("Supported RDT interfaces: " + str(self.supported_iface()))
def init(self, iface, force_iface=False):
"""
Initializes libpqos
Returns:
0 on success
-1 otherwise
"""
if not force_iface and not iface in self.supported_iface():
log.error("RDT does not support '%s' interface!" % (iface))
return -1
# deinitialize lib first
if self.shared_dict['current_iface']:
self.fini()
# umount restcrl to improve caps detection
if platform.system() == 'FreeBSD':
result = os.system(
"/sbin/umount -a -t resctrl") # nosec - string literal
else:
result = os.system(
"/bin/umount -a -t resctrl") # nosec - string literal
if result:
log.error("Failed to umount resctrl fs! status code: %d"\
% (os.WEXITSTATUS(result)))
return -1
# attempt to initialize libpqos
try:
self.pqos.init(iface.upper())
self.cap = PqosCap()
self.l3ca = PqosCatL3()
self.mba = PqosMba()
self.alloc = PqosAlloc()
self.cpuinfo = PqosCpuInfo()
except Exception as ex:
log.error(str(ex))
return -1
# save current interface type in shared dict
self.shared_dict['current_iface'] = iface
# Reread MBA BW status from libpqos
self.refresh_mba_bw_status()
return 0
def refresh_mba_bw_status(self):
"""
Reads MBA BW status from libpqos
and save results in shared dict
Returns:
0 on success
-1 otherwise
"""
try:
supported, enabled = self.cap.is_mba_ctrl_enabled()
# convert None to False
supported = bool(supported)
self.shared_dict['mba_bw_supported'] = supported
self.shared_dict['mba_bw_enabled'] = enabled
except Exception as ex:
log.error("libpqos is_mba_ctrl_enabled(..) call failed!")
log.error(str(ex))
return -1
return 0
def current_iface(self):
"""
Returns current RDT interface
Returns:
interface name on success
None when libpqos is not initialized
"""
return self.shared_dict['current_iface']
def supported_iface(self):
"""
Returns list of supported RDT interfaces
Returns:
list of supported interfaces
"""
# no need to keep it in shared dict as it does not changed
# during runtime.
return self._supported_iface
def is_mba_bw_supported(self):
"""
Returns MBA BW support status
Returns:
MBA BW support status
"""
return self.shared_dict['mba_bw_supported']
def is_mba_bw_enabled(self):
"""
Returns MBA BW enabled status
Returns:
MBA BW enabled status
"""
return self.shared_dict['mba_bw_enabled']
def enable_mba_bw(self, enable):
"""
Change MBA BW enabled status
Returns:
0 on success
-1 otherwise
"""
try:
# call libpqos alloc reset
self.alloc.reset("any", "any", "ctrl" if enable else "default")
except Exception as ex:
log.error("libpqos reset(..) call failed!")
log.error(str(ex))
return -1
# Reread MBA BW status from libpqos
self.refresh_mba_bw_status()
return 0
def fini(self):
"""
De-initializes libpqos
"""
self.pqos.fini()
self.shared_dict['current_iface'] = None
return 0
def release(self, cores):
"""
Release cores, assigns cores to CoS#0
Parameters:
cores: list of cores to be released
Returns:
0 on success
-1 otherwise
"""
if cores is None:
return 0
try:
self.alloc.release(cores)
except Exception as ex:
log.error(str(ex))
return -1
return 0
def alloc_assoc_set(self, cores, cos):
"""
Assigns cores to CoS
Parameters:
cores: list of cores to be assigned to cos
cos: Class of Service
Returns:
0 on success
-1 otherwise
"""
if not cores:
return 0
try:
for core in cores:
self.alloc.assoc_set(core, cos)
except Exception as ex:
log.error(str(ex))
return -1
return 0
def l3ca_set(self, sockets, cos_id, ways_mask):
"""
Configures L3 CAT for CoS
Parameters:
sockets: sockets list on which to configure L3 CAT
cos_id: Class of Service
ways_mask: L3 CAT CBM to set
Returns:
0 on success
-1 otherwise
"""
try:
cos = self.l3ca.COS(cos_id, ways_mask)
for socket in sockets:
self.l3ca.set(socket, [cos])
except Exception as ex:
log.error(str(ex))
return -1
return 0
def mba_set(self, sockets, cos_id, mb_max, ctrl=False):
"""
Configures MBA rate for CoS
Parameters:
sockets: sockets list on which to configure L3 CAT
cos_id: Class of Service
mb_max: MBA rate to set
Returns:
0 on success
-1 otherwise
"""
try:
cos = self.mba.COS(cos_id, mb_max, ctrl)
for socket in sockets:
self.mba.set(socket, [cos])
except Exception as ex:
log.error(str(ex))
return -1
return 0
def is_mba_supported(self):
"""
Checks for MBA support
Returns:
True if supported
False otherwise
"""
try:
return bool(self.get_mba_num_cos())
except Exception as ex:
log.error(str(ex))
return False
def is_l3_cat_supported(self):
"""
Checks for L3 CAT support
Returns:
True if supported
False otherwise
"""
try:
return bool(self.get_l3ca_num_cos())
except Exception as ex:
log.error(str(ex))
return False
def is_multicore(self):
"""
Checks if system is multicore
Returns:
True if multicore
False otherwise
"""
return self.get_num_cores() > 1
def get_num_cores(self):
"""
Gets number of cores in system
Returns:
num of cores
None otherwise
"""
try:
sockets = self.cpuinfo.get_sockets()
return sum(
[len(self.cpuinfo.get_cores(socket)) for socket in sockets])
except Exception as ex:
log.error(str(ex))
return None
def check_core(self, core):
"""
Verifies if a specified core is a valid logical core ID.
Parameters:
core: core ID
Returns:
True/False a given core number is valid/invalid
None otherwise
"""
try:
return self.cpuinfo.check_core(core)
except Exception as ex:
log.error(str(ex))
return None
def get_sockets(self):
"""
Gets list of sockets
Returns:
sockets list,
None otherwise
"""
try:
return self.cpuinfo.get_sockets()
except Exception as ex:
log.error(str(ex))
return None
def get_l3ca_num_cos(self):
"""
Gets number of COS for L3 CAT
Returns:
num of COS for L3 CAT
None otherwise
"""
try:
return self.cap.get_l3ca_cos_num()
except Exception as ex:
log.error(str(ex))
return None
def get_mba_num_cos(self):
"""
Gets number of COS for MBA
Returns:
num of COS for MBA
None otherwise
"""
try:
return self.cap.get_mba_cos_num()
except Exception as ex:
log.error(str(ex))
return None
def get_max_cos_id(self, alloc_type):
"""
Gets max COS# (id) that can be used to configure set of allocation technologies
Returns:
Available COS# to be used
None otherwise
"""
max_cos_num = None
max_cos_cat = self.get_l3ca_num_cos()
max_cos_mba = self.get_mba_num_cos()
if common.CAT_CAP not in alloc_type and common.MBA_CAP not in alloc_type:
return None
if common.CAT_CAP in alloc_type and not max_cos_cat:
return None
if common.MBA_CAP in alloc_type and not max_cos_mba:
return None
if common.CAT_CAP in alloc_type:
max_cos_num = max_cos_cat
if common.MBA_CAP in alloc_type:
if max_cos_num is not None:
max_cos_num = min(max_cos_mba, max_cos_num)
else:
max_cos_num = max_cos_mba
return max_cos_num - 1
def get_max_l3_cat_cbm(self):
"""
Gets Max L3 CAT CBM
Returns:
Max L3 CAT CBM
None otherwise
"""
if not self.is_l3_cat_supported():
return None
try:
l3ca_caps = self.cap.get_type("l3ca")
return 2**l3ca_caps.num_ways - 1
except Exception as ex:
log.error(str(ex))
return None
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
################################################################################
import os
from pqos import Pqos
from pqos.allocation import PqosAlloc
# Initialize PQoS library
pqos = Pqos()
pqos.init("OS")
alloc = PqosAlloc()
# Get PID of the current process
pid = os.getpid()
# Associate process with COS 1
print('Associating process %d with COS 1...' % pid)
alloc.assoc_set_pid(pid, 1)
# Get all processes associated with COS 1
print('Processes associated with COS 1:')
print(alloc.get_pids(1))
# Release association
print('Releasing association for process %d...' % pid)
alloc.release_pid([pid])
class PqosApi:
"""
Wrapper for libpqos wrapper.
"""
def __init__(self):
self.pqos = Pqos()
self.cap = None
self.l3ca = None
self.mba = None
self.alloc = None
self.cpuinfo = None
def init(self):
"""
Initializes libpqos
Returns:
0 on success
-1 otherwise
"""
try:
self.pqos.init('MSR')
self.cap = PqosCap()
self.l3ca = PqosCatL3()
self.mba = PqosMba()
self.alloc = PqosAlloc()
self.cpuinfo = PqosCpuInfo()
except Exception as ex:
log.error(str(ex))
return -1
return 0
def fini(self):
"""
De-initializes libpqos
"""
self.pqos.fini()
return 0
def release(self, cores):
"""
Release cores, assigns cores to CoS#0
Parameters:
cores: list of cores to be released
Returns:
0 on success
-1 otherwise
"""
if cores is None:
return 0
try:
self.alloc.release(cores)
except Exception as ex:
log.error(str(ex))
return -1
return 0
def alloc_assoc_set(self, cores, cos):
"""
Assigns cores to CoS
Parameters:
cores: list of cores to be assigned to cos
cos: Class of Service
Returns:
0 on success
-1 otherwise
"""
if not cores:
return 0
try:
for core in cores:
self.alloc.assoc_set(core, cos)
except Exception as ex:
log.error(str(ex))
return -1
return 0
def l3ca_set(self, sockets, cos_id, ways_mask):
"""
Configures L3 CAT for CoS
Parameters:
sockets: sockets list on which to configure L3 CAT
cos_id: Class of Service
ways_mask: L3 CAT CBM to set
Returns:
0 on success
-1 otherwise
"""
try:
cos = self.l3ca.COS(cos_id, ways_mask)
for socket in sockets:
self.l3ca.set(socket, [cos])
except Exception as ex:
log.error(str(ex))
return -1
return 0
def mba_set(self, sockets, cos_id, mb_max):
"""
Configures MBA for CoS
Parameters:
sockets: sockets list on which to configure L3 CAT
cos_id: Class of Service
mb_max: MBA to set
Returns:
0 on success
-1 otherwise
"""
try:
cos = self.mba.COS(cos_id, mb_max)
for socket in sockets:
self.mba.set(socket, [cos])
except Exception as ex:
log.error(str(ex))
return -1
return 0
def is_mba_supported(self):
"""
Checks for MBA support
Returns:
1 if supported
0 otherwise
"""
try:
return self.get_mba_num_cos() != 0
except Exception as ex:
log.error(str(ex))
return 0
def is_l3_cat_supported(self):
"""
Checks for L3 CAT support
Returns:
1 if supported
0 otherwise
"""
try:
return self.get_l3ca_num_cos() != 0
except Exception as ex:
log.error(str(ex))
return 0
def is_multicore(self):
"""
Checks if system is multicore
Returns:
True if multicore
False otherwise
"""
return self.get_num_cores() > 1
def get_num_cores(self):
"""
Gets number of cores in system
Returns:
num of cores
0 otherwise
"""
try:
sockets = self.cpuinfo.get_sockets()
return sum([len(self.cpuinfo.get_cores(socket)) for socket in sockets])
except Exception as ex:
log.error(str(ex))
return None
def check_core(self, core):
"""
Verifies if a specified core is a valid logical core ID.
Parameters:
core: core ID
Returns:
True/False a given core number is valid/invalid
None otherwise
"""
try:
return self.cpuinfo.check_core(core)
except Exception as ex:
log.error(str(ex))
return None
def get_sockets(self):
"""
Gets list of sockets
Returns:
sockets list,
None otherwise
"""
try:
return self.cpuinfo.get_sockets()
except Exception as ex:
log.error(str(ex))
return None
def get_l3ca_num_cos(self):
"""
Gets number of COS for L3 CAT
Returns:
num of COS for L3 CAT
None otherwise
"""
try:
return self.cap.get_l3ca_cos_num()
except Exception as ex:
log.error(str(ex))
return None
def get_mba_num_cos(self):
"""
Gets number of COS for MBA
Returns:
num of COS for MBA
None otherwise
"""
try:
return self.cap.get_mba_cos_num()
except Exception as ex:
log.error(str(ex))
return None
def get_max_cos_id(self, alloc_type):
"""
Gets max COS# (id) that can be used to configure set of allocation technologies
Returns:
Available COS# to be used
None otherwise
"""
max_cos_num = None
max_cos_cat = self.get_l3ca_num_cos()
max_cos_mba = self.get_mba_num_cos()
if common.CAT_CAP not in alloc_type and common.MBA_CAP not in alloc_type:
return None
if common.CAT_CAP in alloc_type and not max_cos_cat:
return None
if common.MBA_CAP in alloc_type and not max_cos_mba:
return None
if common.CAT_CAP in alloc_type:
max_cos_num = max_cos_cat
if common.MBA_CAP in alloc_type:
if max_cos_num is not None:
max_cos_num = min(max_cos_mba, max_cos_num)
else:
max_cos_num = max_cos_mba
return max_cos_num - 1
def get_max_l3_cat_cbm(self):
"""
Gets Max L3 CAT CBM
Returns:
Max L3 CAT CBM
None otherwise
"""
if not self.is_l3_cat_supported():
return None
try:
l3ca_caps = self.cap.get_type("l3ca")
return 2**l3ca_caps.num_ways - 1
except Exception as ex:
log.error(str(ex))
return None
