NvApplicationProfiler.h

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/*
 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of NVIDIA CORPORATION nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#ifndef __NV_PROFILER_H__
#define __NV_PROFILER_H__

#include <iostream>
#include <pthread.h>
#include <stdint.h>
#include <sys/time.h>
#include <time.h>

class NvApplicationProfiler
{
public
 typedef struct
 {
 struct timeval total_time;
 float peak_cpu_usage;
 float avg_cpu_usage;
 uint32_t num_cpu_cores;
 uint32_t cpu_freq_mhz;
 } NvAppProfilerData;

 static const uint64_t DefaultSamplingInterval = 100;

 static NvApplicationProfiler& getProfilerInstance();

 void start(uint32_t sampling_interval_ms);

 void stop();

 void printProfilerData(std::ostream &outstream = std::cout);

 void getProfilerData(NvAppProfilerData &data);

private
 static void * ProfilerThread(void *);

 bool running;
 uint32_t sampling_interval;
 pthread_mutex_t thread_lock;
 pthread_t profiling_thread;
 uint32_t num_cpu_cores;
 uint32_t cpu_freq;
 bool check_cpu_usage;
 struct ProfilerDataInternal
 {
 struct timeval start_time;
 struct timeval stop_time;

 struct timespec start_proc_cpu_clock_time;
 struct timespec start_cpu_clock_time;

 struct timespec stop_proc_cpu_clock_time;
 struct timespec stop_cpu_clock_time;

 float max_cpu_usage;
 float min_cpu_usage;
 float avg_cpu_usage;

 uint64_t num_readings;
 } data;
 void profile();

 NvApplicationProfiler();

 NvApplicationProfiler(const NvApplicationProfiler& that);
 void operator=(NvApplicationProfiler const&);
};

#endif