[SET_CPU_AFFINITY] Improve Mellanox IRQ and Ethtool decoding

scripts/set_cpu_affinity

@@ -393,9 +393,11 @@ class NetDev:
             klass.ProcIntRe = re.compile(re_str)
         return klass.ProcIntRe
 
-    ProcIntNameRe = re.compile('((?P<type>[^_]+)_comp(?P<mlx_queue>[0-9]+)@'
-                                      'pci:(?P<pci>[0-9:.]+)|'
-                                '(?P<name>[^-]+)-[TtRrXx]+-(?P<intel_queue>[0-9]+))')
+    ProcIntNameRe = re.compile('((?P<type>mlx[^_-]+)(_comp|-)'
+                                      '(?P<mlx_queue>[0-9]+)@'
+                                      '(pci:)?(?P<pci>[0-9A-Fa-f:.]+)|'
+                                '(?P<name>[^-]+)-[TtRrXx]+-'
+                                      '(?P<intel_queue>[0-9]+))')
 
     ProcIntCache = None
 
@@ -405,6 +407,8 @@ class NetDev:
 
     def __init__(self, name):
         self.m_name = name
+        if not os.path.exists(self.getSysfsDir()):
+            raise ValueError(f'Unknown NetDev {name}')
 
     def getSysfsDir(self):
         return f'/sys/class/net/{self.m_name}'
@@ -473,10 +477,10 @@ class NetDev:
 
     def getActiveRxQueueList(self):
         cmd = SystemCmd(['ethtool', '-S', self.getName()])
-        ethtool = cmd.doPopen(stdout=PIPE)
+        ethtool = cmd.doPopen(stdout=PIPE, text=True)
         queue_list = []
         for l in ethtool.stdout:
-            m = self.EthtoolPacketsRe.match(l.decode())
+            m = self.EthtoolPacketsRe.match(l)
             if not m:
                 continue
             if int(m['packets']) > 0: