コード例 #1
0
ファイル: App.cpp プロジェクト: tylerwolverton/CS-334
void App::onRender() {
    // Show message
    message("Rendering...");

    Stopwatch timer;
    rayTraceImage(1.0f, m_raysPerPixel);
    timer.after("Trace");
    debugPrintf("%f s\n", timer.elapsedTime());
//    m_result->toImage3uint8()->save("result.png");
}
コード例 #2
0
ファイル: bsls_performancehint.t.cpp プロジェクト: che2/bde
int main(int argc, char *argv[])
{
    int test = argc > 1 ? atoi(argv[1]) : 0;
    int verbose = argc > 2;
    int veryVerbose = argc > 3;
    int veryVeryVerbose = argc > 4;

    (void) veryVeryVerbose;

    printf("TEST " __FILE__ " CASE %d\n", test);

    switch (test) { case 0:  // Zero is always the leading case.


      case 5: {
        // --------------------------------------------------------------------
        // TESTING USAGE EXAMPLE 3
        //   This will test the usage example 3 provided in the component
        //   header file for 'prefetchForReading' and 'prefetchForWriting'.
        //
        // Concerns:
        //   The usage example provided in the component header file must
        //   compile, link, and run on all platforms as shown.
        //
        // Plan:
        //   Run the usage example using 'prefetchForReading' and
        //   'prefetchForWriting'.
        //
        // Testing:
        //   prefetchForReading
        //   prefetchForWriting
        // --------------------------------------------------------------------

        if (verbose) printf("\nTESTING USAGE EXAMPLE 3"
                            "\n=======================\n");

        UsageExample3Case::testUsageExample3(argc, false);

      } break;
      case 4: {
        // --------------------------------------------------------------------
        // TESTING USAGE EXAMPLE 2
        //   This will test the usage example 2 provided in the component
        //   header file for 'BSLS_PERFORMANCEHINT_PREDICT_EXPECT'.
        //
        // Concerns:
        //   The usage example provided in the component header file must
        //   compile, link, and run on all platforms as shown.
        //
        // Plan:
        //   Ensure the usage example compiles.
        //
        // Testing:
        //   BSLS_PERFORMANCEHINT_PREDICT_EXPECT
        // --------------------------------------------------------------------

        if (verbose) printf("\nTESTING USAGE EXAMPLE 2"
                            "\n=======================\n");

        int x = rand() % 4;

        // Incorrect usage of 'BSLS_PERFORMANCEHINT_PREDICT_EXPECT', since the
        // probability of getting a 3 is equivalent to other numbers (0, 1, 2).
        // However, this is sufficient to illustrate the intent of this macro.

        switch(BSLS_PERFORMANCEHINT_PREDICT_EXPECT(x, 3)) {
          case 1: //..
                  break;
          case 2: //..
                  break;
          case 3: //..
                  break;
          default: break;
        }

      } break;
      case 3: {
        // --------------------------------------------------------------------
        // TESTING USAGE EXAMPLE 1
        //   This will test the usage example 1 provided in the component
        //   header file for 'BSLS_PERFORMANCEHINT_PREDICT_LIKELY' and
        //   'BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY'.
        //
        // Concerns:
        //   The usage example provided in the component header file must
        //   compile, link, and run on all platforms as shown.
        //
        // Plan:
        //   Run the usage example using 'BSLS_PERFORMANCEHINT_PREDICT_LIKELY'
        //   and 'BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY'.
        //
        // Testing:
        //   BSLS_PERFORMANCEHINT_PREDICT_LIKELY,
        //   BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY
        // --------------------------------------------------------------------

        if (verbose) printf("\nTESTING USAGE EXAMPLE 1"
                            "\n=======================\n");


        ASSERT(true);
        UsageExample1Case::testUsageExample1(argc, true);

      } break;

      case 2: {
        // --------------------------------------------------------------------
        // TESTING: BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE
        //
        // Concerns:
        //: 1 'OPTIMIZATION_FENCE' compiles on all platforms.
        //:
        //: 2 On platforms on which it is reasonably implemented,
        //:   'OPTIMIZATION_FENCE' impedes compiler optimizations on optimized
        //:   builds.
        //
        // Plan:
        //: 1 Perform a simple loop incrementing a counter for a set period of
        //:   time, both with and without the use of the 'OPTMIZATION_FENCE'.
        //:   Use a timer to verify the rate of increments using the
        //:   'OPTIMIZATION_FENCE' is slower.  Note that in practice, on
        //:   platforms on which the fence is reasonably implemented (*not*
        //:   older versions of Sun CC), the iteration with the
        //:   'OPTIMIZATION_FENCE" is very noticeably slower (several times
        //:   slower).
        //
        // Testing:
        //   BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE
        // --------------------------------------------------------------------

        if (verbose) printf(
            "\nTESTING: BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE"
            "\n================================================\n");

        ReorderingFenceTestCase::testReorderingFence(argc);

      } break;
      case 1: {
        // --------------------------------------------------------------------
        // TESTING TEST-MACHINERY: 'Stopwatch'
        //
        // Concerns:
        //: 1 That 'Stopwatch' is created in a STOPPED state with an elapsed
        //:   time of 0.
        //:
        //: 2 That 'start' puts the stopwatch in a RUNNING state
        //:
        //: 3 That 'stop' puts the soptwatch in a STOPPED state and recurds
        //:   the accumuted time.
        //:
        //: 4 That 'elaspsedTime' returns the correct elapsed time in
        //:   nanoseconds.
        //:
        //: 5 That 'reset' resets the 'Stopwatch' to its defualt constructed
        //:   state.
        //
        // Plan:
        //: 1 Construct a 'Stopwatch' and verify 'isRunning' is 'false' and
        //:   'elapsedTime' is 0. (C-1)
        //:
        //: 2 Construct a 'Stopwatch', call 'start', sleep for ~1 second and
        //:   verify 'isRunning' it 'true' and 'elapsedTime' is ~1 second.
        //:
        //: 2 Construct a 'Stopwatch', call 'start', sleep for ~1 second and
        //:   then stop the 'Stopwatch'.  Sleep another second. Verify
        //:   'isRunning' it 'false', 'elapsedTime' is ~1, and that the elapsed
        //:   time has not changed since the stopwatch was stopped.
        //
        // Testing:
        //   TESTING TEST-MACHINERY: 'Stopwatch'
        // --------------------------------------------------------------------

        if (verbose) printf("\nTESTING TEST-MACHINERY: 'Stopwatch'"
                            "\n===================================\n");

        const double TOLERANCE = .5;

        if (veryVerbose) printf("\tCompare constructed 'Stopwatch'\n");
        {
            Stopwatch mX; const Stopwatch& X = mX;

            ASSERT(false == X.isRunning());
            ASSERT(0     == X.elapsedTime());
        }

        if (veryVerbose) printf("Test starting a stopwatch\n");
        {
            Stopwatch mX; const Stopwatch& X = mX;

            ASSERT(false == X.isRunning());
            ASSERT(0     == X.elapsedTime());

            mX.start();
            sleep(1);

            ASSERT(true  == X.isRunning());
            ASSERT(1 - TOLERANCE <  X.elapsedTime());
            ASSERT(1 + TOLERANCE >  X.elapsedTime());
        }

        if (veryVerbose) printf("Test stop and elapsedTime\n");
        {
            Stopwatch mX; const Stopwatch& X = mX;

            ASSERT(false == X.isRunning());
            ASSERT(0     == X.elapsedTime());

            mX.start();
            sleep(1);

            ASSERT(true  == X.isRunning());
            ASSERT(0     <  X.elapsedTime());

            mX.stop();

            double EXPECTED = X.elapsedTime();

            sleep(1);

            double ACTUAL   = X.elapsedTime();
            ASSERTV(EXPECTED, ACTUAL,
                    EXPECTED - EXPECTED * .00001 < ACTUAL &&
                    EXPECTED + EXPECTED * .00001 > ACTUAL);
            ASSERTV(X.elapsedTime(), 1 - TOLERANCE <  X.elapsedTime());
            ASSERTV(X.elapsedTime(), 1 + TOLERANCE >  X.elapsedTime());

            mX.reset();

            ASSERT(false == X.isRunning());
            ASSERT(0     == X.elapsedTime());
        }
      } break;
      case -1: {
        // --------------------------------------------------------------------
        // PERFORMANCE TEST
        //   Test the improvement of performance in using various performance
        //   hints.
        //
        // Concerns:
        //   The performance of using the performance hints in the various
        //   usage examples must be faster than not using them.
        //
        // Plan:
        //   Using 'Stopwatch', compare the time it takes to run the test
        //   using the performance hints and not using the hints.  Then compare
        //   and assert the time difference.  The test driver must observe an
        //   improvement in performance.  To minimize the effect of caching
        //   biasing the result, run the version that uses the proper hint
        //   first.
        //
        // Testing:
        //   PERFORMANCE TEST
        // --------------------------------------------------------------------

        if (verbose) printf("\nPERFORMANCE TEST"
                            "\n================\n");

        if (veryVerbose) {
            printf("Usage Example 1:\n");
        }

        UsageExample1Case::testUsageExample1(argc, true);

        if (veryVerbose) {
            printf("Usage Example 3:\n");
        }

        UsageExample3Case::testUsageExample3(argc, true);

      } break;
      case -2: {
        // --------------------------------------------------------------------
        // CONCERN: STOPWATCH ACCURACY
        //   This test is concerned with the accuracy of 'Stopwatch'. It is a
        //   negative test case because it takes ~1 minute to run.

        // Concerns:
        //: 1 That the 'elapsedTime' reported by 'Stopwatch' is accurate.
        //
        // Plan:
        //: 1 Perform a loop-based tested, sleeping over a series of different
        //:   delay periods and comparing the results of
        //:   'Stopwatch::elapsedTime' to 'time'
        //
        // Testing:
        //   CONCERN: STOPWATCH ACCURACY
        // --------------------------------------------------------------------

        if (verbose) printf("\nCONCERN: STOPWATCH ACCURACY"
                            "\n===========================\n");

        if (veryVerbose) printf("\tCompare results w/ 'time'\n");

        for (int i = 1; i < 7; ++i){
            const int DELAY = i;

            time_t    startTime = time(0);
            Stopwatch mX;
            mX.start();

            sleep(DELAY);

            mX.stop();
            time_t expectedElaspedTime = time(0) - startTime;

            if (veryVerbose) {
                P_(DELAY); P_(mX.elapsedTime()); P(expectedElaspedTime);
            }
            ASSERT(mX.elapsedTime() < expectedElaspedTime + 1 &&
                   mX.elapsedTime() > expectedElaspedTime - 1);
        }
      } break;
       default: {
        fprintf(stderr, "WARNING: CASE `%d' NOT FOUND.\n", test);
        testStatus = -1;
      }
    }

    if (testStatus > 0) {
        fprintf(stderr, "Error, non-zero test status = %d.\n", testStatus);
    }
    return testStatus;
}
コード例 #3
0
ファイル: bsls_performancehint.t.cpp プロジェクト: che2/bde
void testReorderingFence(int argc)
{
    int verbose = argc > 2;
    int veryVerbose = argc > 3;
    int veryVeryVerbose = argc > 4;

    // suppress 'unused parameter' compiler warnings:
    (void) verbose;
    (void) veryVeryVerbose;

    enum {
        CHUNK_SIZE = 1000
    };
    double    rateWithFence;
    double    rateWithoutFence;

    if (veryVerbose) {
        printf("With BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE\n");
    }
    {
        Stopwatch timer;
        timer.start();

        double elapsedTime = 0;
        int    iterations  = 0;
        int    numChunks   = 0;
        while (elapsedTime <= .4) {
            for (int i = 0; i < CHUNK_SIZE; ++i) {
                iterations++;
                BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE;
            }
            ++numChunks;
            elapsedTime = timer.elapsedTime();
        }

        rateWithFence = numChunks/elapsedTime;
    }

    if (veryVerbose) {
        printf("\trate = %f\n", rateWithFence);
    }


    if (veryVerbose) {
        printf("Without BSLS_PERFORMANCEHINT_OPTIMIZATION_FENCE\n");
    }
    {
        Stopwatch timer;
        timer.start();

        double elapsedTime = 0;
        int    iterations  = 0;
        int    numChunks   = 0;
        while (elapsedTime <= .4) {
            for (int i = 0; i < CHUNK_SIZE; ++i) {
                iterations++;
            }
            ++numChunks;
            elapsedTime = timer.elapsedTime();
        }

        rateWithoutFence = numChunks/elapsedTime;
    }
    if (veryVerbose) {
        printf("\trate = %f\n", rateWithoutFence);
    }

#if defined(BDE_BUILD_TARGET_OPT) &&                                          \
  !(defined(BSLS_PLATFORM_CMP_SUN) && (BSLS_PLATFORM_CMP_VERSION < 0x5110))

    // Perform this test only for optimized builds.  Also older Sun compilers
    // do not support this fence.

    LOOP2_ASSERT(rateWithFence, rateWithoutFence,
                 rateWithFence < rateWithoutFence);
#endif
}
コード例 #4
0
ファイル: bsls_performancehint.t.cpp プロジェクト: che2/bde
void testUsageExample3(int argc, bool assert)
{
    int verbose = argc > 2;
    int veryVerbose = argc > 3;
    int veryVeryVerbose = argc > 4;

    // suppress 'unused parameter' compiler warnings:
    (void) assert;
    (void) verbose;
    (void) veryVeryVerbose;

    if (veryVerbose) {
        printf("Adding without prefetch\n");
    }

    UsageExample3Case::init(UsageExample3Case::array1,
                            UsageExample3Case::array2);

    Stopwatch timer;
    timer.start();

    for(int i = 0; i < TESTSIZE; ++i) {
        UsageExample3Case::addWithoutPrefetch(UsageExample3Case::array1,
                                              UsageExample3Case::array2);
    }

    timer.stop();
    double withoutPrefetch = timer.elapsedTime();

    if (veryVerbose) {
        P(withoutPrefetch);
    }

    if (veryVerbose) {
        printf("Adding with prefetch\n");
    }

    UsageExample3Case::init(UsageExample3Case::array3,
                            UsageExample3Case::array4);

    timer.reset();
    timer.start();

    for(int i = 0; i < UsageExample3Case::TESTSIZE; ++i) {
        addWithPrefetch(array3, array4);
    }

    timer.stop();
    double withPrefetch = timer.elapsedTime();

    if (veryVerbose) {
        P(withPrefetch);
    }

#if defined(BDE_BUILD_TARGET_OPT)
    // Only check under optimized build.

#if defined(BSLS_PLATFORM_CMP_CLANG)                                          \
 || defined(BSLS_PLATFORM_CMP_GNU)                                            \
 || defined(BSLS_PLATFORM_CMP_SUN)                                            \
 || defined(BSLS_PLATFORM_CMP_IBM)                                            \
 || defined(BSLS_PLATFORM_OS_WINDOWS)
    // Only check when 'prefetchForReading' or 'prefetchForWriting' expands
    // expands into something meaningful.

    double tolerance = 0.02;

    // Note that when compiling using 'bde_build.pl -t opt_exc_mt', the
    // optimization flag is set to '-O'.  Whereas, the optimization flag used
    // by 'IS_OPTIMIZED=1 pcomp' is set to '-xO2'.  Therefore, the improvement
    // in efficiency is much less than what's described in the usage example
    // when compiled using bde_build.

    if (assert) {
        // Only assert in performance test case.
        LOOP2_ASSERT(withoutPrefetch, withPrefetch,
                     withoutPrefetch + tolerance > withPrefetch);
    }

#endif

#endif

}
コード例 #5
0
ファイル: bsls_performancehint.t.cpp プロジェクト: che2/bde
void testUsageExample1(int argc, bool assert)
{
    int verbose = argc > 2;
    int veryVerbose = argc > 3;
    int veryVeryVerbose = argc > 4;

    double tolerance = 0.05;

    (void) assert;
    (void) verbose;
    (void) veryVerbose;
    (void) veryVeryVerbose;
    (void) tolerance;

    Stopwatch timer;

    timer.reset();

    if (veryVerbose) {
        printf("BSLS_PERFORMANCEHINT_PREDICT_LIKELY\n");
    }

    timer.start();

    for (int x = 0; x < TESTSIZE; ++x) {
        int y = rand() % 100;

        // Incorrect usage of 'BSLS_PERFORMANCEHINT_PREDICT_LIKELY' since there
        // is only a one in 100 chance that this branch is taken.

        if (BSLS_PERFORMANCEHINT_PREDICT_LIKELY(y == 8)) {
            foo();
        }
        else {
            BSLS_PERFORMANCEHINT_UNLIKELY_HINT;
            bar();
        }
    }

    timer.stop();
    double likelyTime = timer.elapsedTime();

    if (veryVerbose) {
        P(likelyTime);
    }


    if (veryVerbose) {
        printf("BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY\n");
    }

    timer.reset();
    timer.start();

    for (int x = 0; x < TESTSIZE; ++x) {
        int y = rand() % 100;

        // Correct usage of 'BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY' since there
        // is only a one in 100 chance that this branch is taken.

        if (BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY(y == 8)) {
            BSLS_PERFORMANCEHINT_UNLIKELY_HINT;
            foo();
        }
        else {
            bar();
        }
    }
    timer.stop();
    double unlikelyTime = timer.elapsedTime();

    if (veryVerbose) {
        P(unlikelyTime);
    }

#if defined(BDE_BUILD_TARGET_OPT)
    // Only check under optimized build.

#if defined(BSLS_PLATFORM_CMP_CLANG)                                          \
 || defined(BSLS_PLATFORM_CMP_GNU)                                            \
 || defined(BSLS_PLATFORM_CMP_SUN)                                            \
 || (defined(BSLS_PLATFORM_CMP_IBM) && BSLS_PLATFORM_CMP_VERSION >= 0x0900)
    // Only check when 'BSLS_PERFORMANCEHINT_PREDICT_LIKELY' and
    // 'BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY' expands into something
    // meaningful.

    if (assert) {
        LOOP2_ASSERT(likelyTime, unlikelyTime,
                     likelyTime + tolerance > unlikelyTime);
    }

#endif

#endif

}