Author: aconway
Date: Sun Dec 7 10:46:40 2008
New Revision: 724169
URL: http://svn.apache.org/viewvc?rev=724169&view=rev
Log:
src/qpid/sys/ActivityTimer.h: record time spent in specific code segments, for
profiling/debugging.
Added:
incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h (with props)
Added: incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h
URL:
http://svn.apache.org/viewvc/incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h?rev=724169&view=auto
==============================================================================
--- incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h (added)
+++ incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h Sun Dec 7
10:46:40 2008
@@ -0,0 +1,111 @@
+#ifndef QPID_SYS_ACTIVITYTIMER_H
+#define QPID_SYS_ACTIVITYTIMER_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "qpid/sys/Time.h"
+#include "qpid/sys/Thread.h"
+#include <boost/current_function.hpp>
+#include <stdio.h>
+
+namespace qpid {
+namespace sys {
+
+/**
+ * Measures and reports time spent in a particular segment of code.
+ * This is real time so it includes time blocked/sleeping as well as time on
CPU.
+ *
+ * Intended to be used via the QPID_ACTIVITY_TIMER macro for profiling
+ * during development & debugging
+ */
+class ActivityTimer
+{
+ public:
+
+ struct Stat { // Must be a POD
+ uint64_t total, count;
+ void sample(uint64_t value) { total += value; ++count; }
+ uint64_t mean() { return count ? total/count : 0; }
+ void reset() { total = count = 0; }
+ };
+
+ struct Data { // Must be a POD
+ uint64_t start, entered, exited;
+ Stat active, inactive;
+
+ void reset() {
+ start = entered = exited = 0;
+ active.reset();
+ inactive.reset();
+ }
+
+ void enter(uint64_t now) {
+ entered=now;
+ if (start) {
+ assert(exited);
+ assert(entered > exited);
+ inactive.sample(entered - exited);
+ }
+ else
+ start = Duration(now);
+ }
+
+ void exit(uint64_t now) {
+ assert(start);
+ assert(entered);
+ exited=now;
+ assert(exited > entered);
+ active.sample(exited - entered);
+ }
+ };
+
+ ActivityTimer(Data& d, const char* fn, const char* file, int line,
uint64_t reportInterval) : data(d) {
+ uint64_t now = Duration(qpid::sys::now());
+ if (data.start && now - data.start > reportInterval)
+ report(fn, file, line);
+ data.enter(now);
+ }
+
+ ~ActivityTimer() {
+ data.exit(Duration(now()));
+ }
+
+ private:
+ Data& data;
+
+ void report(const char* fn, const char* file, int line) {
+ uint64_t secs = (Duration(now())-data.start)/TIME_SEC;
+ printf("[%lu]%s:%d: %s: rate=%llu/sec active=%llu inactive=%llu\n",
Thread::current().id(), file, line, fn, data.active.count/secs,
data.active.mean()/TIME_USEC, data.inactive.mean()/TIME_USEC);
+ data.reset();
+ }
+};
+
+}} // namespace qpid::sys
+
+/** Measures time between the point of declaration and the end of the
innermost enclosing scope.
+ * Can only have one in a given scope.
+ */
+#define ACTIVITY_TIMER(REPORT_INTERVAL_SECS) \
+ static __thread ::qpid::sys::ActivityTimer::Data qpid__ActivityTimerData__
= { 0, 0, 0, { 0, 0 }, { 0, 0 } }; \
+ ActivityTimer qpid__ActivityTimerInstance__(qpid__ActivityTimerData__,
BOOST_CURRENT_FUNCTION, __FILE__, __LINE__, 2*TIME_SEC)
+
+#endif /*!QPID_SYS_ACTIVITYTIMER_H*/
Propchange: incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h
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svn:eol-style = native
Propchange: incubator/qpid/trunk/qpid/cpp/src/qpid/sys/ActivityTimer.h
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svn:keywords = Rev Date
