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