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dstat_vmk_int.py
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### Author: Bert de Bruijn <bert+dstat$debruijn,be> ### VMware ESX kernel interrupt stats ### Displays kernel interrupt statistics on VMware ESX servers # NOTE TO USERS: command-line plugin configuration is not yet possible, so I've # "borrowed" the -I argument. # EXAMPLES: # # dstat --vmkint -I 0x46,0x5a # You can even combine the Linux and VMkernel interrupt stats # # dstat --vmkint -i -I 14,0x5a # Look at /proc/vmware/interrupts to see which interrupt is linked to which function class dstat_plugin(dstat): def __init__(self): self.name = 'vmkint' self.type = 'd' self.width = 4 self.scale = 1000 self.open('/proc/vmware/interrupts') # self.intmap = self.intmap() # def intmap(self): # ret = {} # for line in dopen('/proc/vmware/interrupts').readlines(): # l = line.split() # if len(l) <= self.vmkcpunr: continue # l1 = l[0].split(':')[0] # l2 = ' '.join(l[vmkcpunr()+1:]).split(',') # ret[l1] = l1 # for name in l2: # ret[name.strip().lower()] = l1 # return ret def vmkcpunr(self): #the service console sees only one CPU, so cpunr == 1, only the vmkernel sees all CPUs ret = [] # default cpu number is 2 ret = 2 for l in self.fd[0].splitlines(): if l[0] == 'Vector': ret = int( int( l[-1] ) + 1 ) return ret def discover(self): #interrupt names are not decimal numbers, but rather hexadecimal numbers like 0x7e ret = [] self.fd[0].seek(0) for line in self.fd[0].readlines(): l = line.split() if l[0] == 'Vector': continue if len(l) < self.vmkcpunr()+1: continue name = l[0].split(':')[0] amount = 0 for i in l[1:1+self.vmkcpunr()]: amount = amount + long(i) if amount > 20: ret.append(str(name)) return ret def vars(self): ret = [] if op.intlist: list = op.intlist else: list = self.discover # len(list) > 5: list = list[-5:] for name in list: if name in self.discover: ret.append(name) # elif name.lower() in self.intmap.keys(): # ret.append(self.intmap[name.lower()]) return ret def check(self): try: os.listdir('/proc/vmware') except: raise Exception, 'Needs VMware ESX' info(1, 'The vmkint module is an EXPERIMENTAL module.') def extract(self): self.fd[0].seek(0) for line in self.fd[0].readlines(): l = line.split() if len(l) < self.vmkcpunr()+1: continue name = l[0].split(':')[0] if name in self.vars: self.set2[name] = 0 for i in l[1:1+self.vmkcpunr()]: self.set2[name] = self.set2[name] + long(i) for name in self.set2.keys(): self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed if step == op.delay: self.set1.update(self.set2) # vim:ts=4:sw=4