def buildTxn(self, counter, resumeTxn=False):
"""
Constructs a new transaction instance
:param counter: counter with probe and sample data
"""
txnId = None
self.suspendingTxn = False
if resumeTxn:
txnId = counter.data
txn = Transaction(counter, txnId)
self.resumeFragment = self.fragments.addResumeFragment(txnId, txn)
return txn
self.resumeFragment = None
self.nextFragmentId += 1
return Transaction(counter, self.nextFragmentId)
def loadCounter(self, counter):
"""
Associates the given counter to a transaction
:param counter: Counter with probe and sample data
:type counter: xpedite.types.Counter
"""
self.processedCounterCount += 1
userProbe = self.probeMap.get(counter.probe, None)
if self.currentTxn:
if userProbe:
if not userProbe.isAnonymous:
self.markCounter(counter)
if counter.txnId or userProbe.isAnonymous:
if userProbe.isAnonymous or counter.txnId == self.currentTxn.txnId:
self.currentTxn.addCounter(counter, False)
else:
if self.distortionCount == 0:
self.appendTxn(self.currentTxn)
self.currentTxn = Transaction(counter, counter.txnId)
else:
self.distortionCount -= 1
self.compromisedTxns.append(self.currentTxn)
self.currentTxn = Transaction(counter, counter.txnId)
else:
# explicit probe missing id likely compromised - skip this and the next transaction
self.currentTxn.addCounter(counter, False)
self.distortionCount = 2
else:
self.currentTxn.addCounter(counter, False)
elif userProbe and not userProbe.isAnonymous and self.markCounter(counter):
self.currentTxn = Transaction(counter, counter.txnId)
else:
self.nonTxnCounters.append(counter)
class ChaoticTxnLoader(AbstractTxnLoader):
"""Loads transactions from counters with tolerance for compromised transactions"""
def __init__(self, name, cpuInfo, probes, topdownMetrics, events):
"""
Constructs a transaction loader resilient to data corruption
:param name: Name of the profile being loaded
:param probes: List of probes enabled for the profile session
:param topdownMetrics: Top down metrics to be computed
:param events: PMU events collected for the profile session
"""
AbstractTxnLoader.__init__(self, name, cpuInfo, probes, topdownMetrics, events)
self.distortionCount = 0
@staticmethod
def markCounter(counter):
"""
Extracts transaction id from the given counter
:param counter: Counter with transaction id
"""
if counter.data and len(counter.data) >= 8:
idIndex = len(counter.data)-8
counter.txnId = int(counter.data[idIndex:], 16)
counter.data = counter.data[0:idIndex]
return counter.txnId
def loadCounter(self, counter):
"""
Associates the given counter to a transaction
:param counter: Counter with probe and sample data
:type counter: xpedite.types.Counter
"""
self.processedCounterCount += 1
userProbe = self.probeMap.get(counter.probe, None)
if self.currentTxn:
if userProbe:
if not userProbe.isAnonymous:
self.markCounter(counter)
if counter.txnId or userProbe.isAnonymous:
if userProbe.isAnonymous or counter.txnId == self.currentTxn.txnId:
self.currentTxn.addCounter(counter, False)
else:
if self.distortionCount == 0:
self.appendTxn(self.currentTxn)
self.currentTxn = Transaction(counter, counter.txnId)
else:
self.distortionCount -= 1
self.compromisedTxns.append(self.currentTxn)
self.currentTxn = Transaction(counter, counter.txnId)
else:
# explicit probe missing id likely compromised - skip this and the next transaction
self.currentTxn.addCounter(counter, False)
self.distortionCount = 2
else:
self.currentTxn.addCounter(counter, False)
elif userProbe and not userProbe.isAnonymous and self.markCounter(counter):
self.currentTxn = Transaction(counter, counter.txnId)
else:
self.nonTxnCounters.append(counter)
def endLoad(self):
"""Marks end of the current load session"""
if self.currentTxn:
if self.distortionCount == 0:
self.appendTxn(self.currentTxn)
else:
self.compromisedTxns.append(self.currentTxn)
self.distortionCount = 0
self.currentTxn = None