| #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; |
| Stat active; |
| |
| void reset() { |
| start = entered = 0; |
| active.reset(); |
| } |
| |
| void enter(uint64_t now) { |
| entered=now; |
| if (!start) start = Duration(now); |
| } |
| |
| void exit(uint64_t now) { |
| active.sample(now - 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) { |
| interval = now-data.start; |
| if (interval > reportInterval) |
| report(fn, file, line); |
| } |
| data.enter(now); |
| } |
| |
| ~ActivityTimer() { |
| data.exit(Duration(now())); |
| } |
| |
| private: |
| Data& data; |
| uint64_t interval; |
| |
| void report(const char* fn, const char* file, int line) { |
| long rate = (data.active.count*TIME_SEC)/interval; |
| double percent = (data.active.total*100.0)/interval; |
| printf("%s:%d: TIMER %ld/sec %f%% [%lu] %s\n", |
| file, line, rate, percent, Thread::current().id(), fn); |
| 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 }}; \ |
| ::qpid::sys::ActivityTimer qpid__ActivityTimerInstance__(qpid__ActivityTimerData__, BOOST_CURRENT_FUNCTION, __FILE__, __LINE__, 2*::qpid::sys::TIME_SEC) |
| |
| #endif /*!QPID_SYS_ACTIVITYTIMER_H*/ |