def test_init(self, lib):
"""
Tests if the pointer to capabilities object given to PQoS library APIs
is the same returned from pqos_cap_get() API during
an initialization of PqosCap.
"""
builder = PqosCapMockBuilder()
p_cap = builder.build()
def pqos_cap_get_mock(cap_ref, _cpu_ref):
"Mock pqos_cap_get()."
ctypes.memmove(cap_ref, ctypes.addressof(p_cap),
ctypes.sizeof(p_cap))
return 0
def pqos_cap_get_type_mock(cap_ref, _type_enum, _p_cap_item_ref):
"Mock pqos_cap_get_type()."
cap_ref_addr = ctypes.addressof(cap_ref.contents)
p_cap_addr = ctypes.addressof(p_cap.contents)
self.assertEqual(cap_ref_addr, p_cap_addr)
return 1
lib.pqos_cap_get = MagicMock(side_effect=pqos_cap_get_mock)
lib.pqos_cap_get_type = MagicMock(side_effect=pqos_cap_get_type_mock)
pqos_cap = PqosCap()
with self.assertRaises(PqosError):
pqos_cap.get_type('mba')
def test_init(self, lib):
"""
Tests if the pointer to capabilities object given to PQoS library APIs
is the same returned from pqos_cap_get() API during
an initialization of PqosCap.
"""
builder = PqosCapMockBuilder()
p_cap = builder.build()
def pqos_cap_get_mock(cap_ref, _cpu_ref):
"Mock pqos_cap_get()."
ctypes.memmove(cap_ref, ctypes.addressof(p_cap),
ctypes.sizeof(p_cap))
return 0
def pqos_cap_get_type_mock(cap_ref, _type_enum, _p_cap_item_ref):
"Mock pqos_cap_get_type()."
cap_ref_addr = ctypes.addressof(cap_ref.contents)
p_cap_addr = ctypes.addressof(p_cap.contents)
self.assertEqual(cap_ref_addr, p_cap_addr)
return 1
lib.pqos_cap_get = MagicMock(side_effect=pqos_cap_get_mock)
lib.pqos_cap_get_type = MagicMock(side_effect=pqos_cap_get_type_mock)
pqos_cap = PqosCap()
with self.assertRaises(PqosError):
pqos_cap.get_type('mba')
def test_get_type_mba(self, lib):
"Tests get_type() method for MBA."
mba = CPqosCapabilityMBA(mem_size=ctypes.sizeof(CPqosCapabilityMBA),
num_classes=2,
throttle_max=95,
throttle_step=15,
is_linear=1,
ctrl=1,
ctrl_on=0)
mba_u = CPqosCapabilityUnion(mba=ctypes.pointer(mba))
mba_cap = CPqosCapability(type=CPqosCapability.PQOS_CAP_TYPE_MBA,
u=mba_u)
_prepare_get_type(lib, mba_cap)
pqos_cap = PqosCap()
mba_capability = pqos_cap.get_type('mba')
self.assertEqual(mba_capability.num_classes, 2)
self.assertEqual(mba_capability.throttle_max, 95)
self.assertEqual(mba_capability.throttle_step, 15)
self.assertEqual(mba_capability.is_linear, True)
self.assertEqual(mba_capability.ctrl, True)
self.assertEqual(mba_capability.ctrl_on, False)
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 test_get_mba_cos_num(self, lib):
"Tests get_mba_cos_num() method."
def pqos_mba_cos_num_m(_cap_ref, cos_num_ref):
"Mock pqos_mba_cos_num()."
ctypes_ref_set_int(cos_num_ref, 9)
return 0
lib.pqos_cap_get = MagicMock(return_value=0)
lib.pqos_mba_get_cos_num = MagicMock(side_effect=pqos_mba_cos_num_m)
pqos_cap = PqosCap()
cos_num = pqos_cap.get_mba_cos_num()
self.assertEqual(cos_num, 9)
def test_is_mba_ctrl_enabled(self, lib):
"Tests is_mba_ctrl_enabled() method."
def pqos_mba_ct_enabled_m(_cap_ref, supported_ref, enabled_ref):
"Mock pqos_mba_ctrl_enabled()."
ctypes_ref_set_int(supported_ref, 1)
ctypes_ref_set_int(enabled_ref, -1)
return 0
lib.pqos_cap_get = MagicMock(return_value=0)
lib.pqos_mba_ctrl_enabled = MagicMock(side_effect=pqos_mba_ct_enabled_m)
pqos_cap = PqosCap()
supported, enabled = pqos_cap.is_mba_ctrl_enabled()
self.assertEqual(supported, True)
self.assertEqual(enabled, None)
def get(self, l2id):
"""
Reads classes of service from a L2 ID.
Parameters:
l2id: L2 cache identifier
"""
cap = PqosCap()
cos_num = cap.get_l2ca_cos_num()
l2cas = (CPqosL2Ca * cos_num)()
num_ca = ctypes.c_uint(0)
num_ca_ref = ctypes.byref(num_ca)
ret = self.pqos.lib.pqos_l2ca_get(l2id, cos_num, num_ca_ref, l2cas)
pqos_handle_error('pqos_l2ca_get', ret)
coses = [l2ca.to_cos(self.COS) for l2ca in l2cas[:num_ca.value]]
return coses
def get(self, socket):
"""
Reads classes of service from a socket.
Parameters:
socket: a socket number
"""
cap = PqosCap()
cos_num = cap.get_l2ca_cos_num()
l2cas = (CPqosL2Ca * cos_num)()
num_ca = ctypes.c_uint(0)
num_ca_ref = ctypes.byref(num_ca)
ret = self.pqos.lib.pqos_l2ca_get(socket, cos_num, num_ca_ref, l2cas)
pqos_handle_error(u'pqos_l2ca_get', ret)
coses = [l2ca.to_cos(self.COS) for l2ca in l2cas]
return coses
def test_get_type_l3ca(self, lib):
"Tests get_type() method for L3 cache allocation."
l3ca = CPqosCapabilityL3(mem_size=ctypes.sizeof(CPqosCapabilityL3),
num_classes=2, num_ways=8, way_size=1024*1024,
way_contention=0, cdp=1, cdp_on=0)
l3ca_u = CPqosCapabilityUnion(l3ca=ctypes.pointer(l3ca))
l3ca_cap = CPqosCapability(type=CPqosCapability.PQOS_CAP_TYPE_L3CA,
u=l3ca_u)
_prepare_get_type(lib, l3ca_cap)
pqos_cap = PqosCap()
l3ca_capability = pqos_cap.get_type('l3ca')
self.assertEqual(l3ca_capability.num_classes, 2)
self.assertEqual(l3ca_capability.num_ways, 8)
self.assertEqual(l3ca_capability.way_size, 1024*1024)
self.assertEqual(l3ca_capability.way_contention, 0)
self.assertEqual(l3ca_capability.cdp, True)
self.assertEqual(l3ca_capability.cdp_on, False)
def test_get_type_l2ca(self, lib):
"Tests get_type() method for L2 cache allocation."
l2ca = CPqosCapabilityL2(mem_size=ctypes.sizeof(CPqosCapabilityL2),
num_classes=4, num_ways=16,
way_size=2*1024*1024, way_contention=0, cdp=1,
cdp_on=0)
l2ca_u = CPqosCapabilityUnion(l2ca=ctypes.pointer(l2ca))
l2ca_cap = CPqosCapability(type=CPqosCapability.PQOS_CAP_TYPE_L2CA,
u=l2ca_u)
_prepare_get_type(lib, l2ca_cap)
pqos_cap = PqosCap()
l2ca_capability = pqos_cap.get_type('l2ca')
self.assertEqual(l2ca_capability.num_classes, 4)
self.assertEqual(l2ca_capability.num_ways, 16)
self.assertEqual(l2ca_capability.way_size, 2*1024*1024)
self.assertEqual(l2ca_capability.way_contention, 0)
self.assertEqual(l2ca_capability.cdp, True)
self.assertEqual(l2ca_capability.cdp_on, False)
def test_get_type_mba(self, lib):
"Tests get_type() method for MBA."
mba = CPqosCapabilityMBA(mem_size=ctypes.sizeof(CPqosCapabilityMBA),
num_classes=2, throttle_max=95,
throttle_step=15, is_linear=1, ctrl=1,
ctrl_on=0)
mba_u = CPqosCapabilityUnion(mba=ctypes.pointer(mba))
mba_cap = CPqosCapability(type=CPqosCapability.PQOS_CAP_TYPE_MBA,
u=mba_u)
_prepare_get_type(lib, mba_cap)
pqos_cap = PqosCap()
mba_capability = pqos_cap.get_type('mba')
self.assertEqual(mba_capability.num_classes, 2)
self.assertEqual(mba_capability.throttle_max, 95)
self.assertEqual(mba_capability.throttle_step, 15)
self.assertEqual(mba_capability.is_linear, True)
self.assertEqual(mba_capability.ctrl, True)
self.assertEqual(mba_capability.ctrl_on, False)
def get(self, socket):
"""
Reads MBA configuration for a socket.
Parameters:
socket: socket ID
Returns:
a list of PqosMba.COS object with actual MBA configuration
for a given socket
"""
cap = PqosCap()
max_num_cos = cap.get_mba_cos_num()
num_cos = ctypes.c_uint(0)
cos_arr = (CPqosMba * max_num_cos)()
ret = self.pqos.lib.pqos_mba_get(socket, max_num_cos,
ctypes.byref(num_cos), cos_arr)
pqos_handle_error(u'pqos_mba_get', ret)
coses = [cos_arr[i].to_cos(self.COS) for i in range(num_cos.value)]
return coses
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
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
# 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.
################################################################################
from pqos import Pqos
from pqos.capability import PqosCap
from pqos.mba import PqosMba
# Initialize PQoS library
pqos = Pqos()
pqos.init('OS')
# Check if MBA is supported
cap = PqosCap()
mba_supported = False
try:
cap.get_type('mba')
mba_supported = True
except:
pass
print('Is MBA supported? %s' % ('Yes' if mba_supported else 'No'))
if mba_supported:
mba = PqosMba()
# Get MBA configuration for socket 0
coses = mba.get(0)
# 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.
################################################################################
from pqos import Pqos
from pqos.capability import PqosCap
from pqos.mba import PqosMba
# Initialize PQoS library
pqos = Pqos()
pqos.init('OS')
# Check if MBA is supported
cap = PqosCap()
mba_supported = False
try:
cap.get_type('mba')
mba_supported = True
except:
pass
print('Is MBA supported? %s' % ('Yes' if mba_supported else 'No'))
if mba_supported:
mba = PqosMba()
# Get MBA configuration for socket 0
coses = mba.get(0)
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# 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.
################################################################################
from pqos import Pqos
from pqos.capability import PqosCap
# Initialize PQoS library
pqos = Pqos()
pqos.init('OS')
cap = PqosCap()
# Check if MBA is supported
mba_supported = False
try:
cap.get_type('mba')
mba_supported = True
except:
pass
print('Is MBA supported? %s' % ('Yes' if mba_supported else 'No'))
if mba_supported:
# Get number of MBA classes of service
mba_cos_num = cap.get_mba_cos_num()
print('MBA: available %d classes of service' % mba_cos_num)
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
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# 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.
################################################################################
from pqos import Pqos
from pqos.capability import PqosCap
# Initialize PQoS library
pqos = Pqos()
pqos.init('OS')
cap = PqosCap()
# Check if MBA is supported
mba_supported = False
try:
cap.get_type('mba')
mba_supported = True
except:
pass
print('Is MBA supported? %s' % ('Yes' if mba_supported else 'No'))
if mba_supported:
# Get number of MBA classes of service
mba_cos_num = cap.get_mba_cos_num()
print('MBA: available %d classes of service' % mba_cos_num)
