Function evaluateScoreForDevice

deps/tesseract/opencl/openclwrapper.cpp:2557–2609

evaluate devices

// evaluate devices
static ds_status evaluateScoreForDevice( ds_device *device, void *inputData) {
    // overwrite statuc gpuEnv w/ current device
    // so native opencl calls can be used; they use static gpuEnv
    printf("\n[DS] Device: \"%s\" (%s) evaluation...\n", device->oclDeviceName, device->type==DS_DEVICE_OPENCL_DEVICE ? "OpenCL" : "Native" );
    GPUEnv *env = NULL;
    if (device->type == DS_DEVICE_OPENCL_DEVICE) {
        env = new GPUEnv;
        //printf("[DS] populating tmp GPUEnv from device\n");
        populateGPUEnvFromDevice( env, device->oclDeviceID);
        env->mnFileCount = 0; //argc;
        env->mnKernelCount = 0UL;
        //printf("[DS] compiling kernels for tmp GPUEnv\n");
        OpenclDevice::gpuEnv = *env;
        OpenclDevice::CompileKernelFile(env, "");
    }

    TessScoreEvaluationInputData *input = (TessScoreEvaluationInputData *)inputData;

    // pixReadTiff
    double composeRGBPixelTime = composeRGBPixelMicroBench( env, *input, device->type );

    // HistogramRect
    double histogramRectTime = histogramRectMicroBench( env, *input, device->type );

    // ThresholdRectToPix
    double thresholdRectToPixTime = thresholdRectToPixMicroBench( env, *input, device->type );

    // getLineMasks
    double getLineMasksMorphTime = getLineMasksMorphMicroBench( env, *input, device->type );


    // weigh times (% of cpu time)
    // these weights should be the % execution time that the native cpu code took
    float composeRGBPixelWeight     = 1.2f;
    float histogramRectWeight       = 2.4f;
    float thresholdRectToPixWeight  = 4.5f;
    float getLineMasksMorphWeight = 5.0f;

    float weightedTime = composeRGBPixelWeight * composeRGBPixelTime +
                         histogramRectWeight * histogramRectTime +
                         thresholdRectToPixWeight * thresholdRectToPixTime +
                         getLineMasksMorphWeight * getLineMasksMorphTime;
    device->score = new TessDeviceScore;
    ((TessDeviceScore *)device->score)->time = weightedTime;

    printf("[DS] Device: \"%s\" (%s) evaluated\n", device->oclDeviceName, device->type==DS_DEVICE_OPENCL_DEVICE ? "OpenCL" : "Native" );
    printf("[DS]%25s: %f (w=%.1f)\n", "composeRGBPixel", composeRGBPixelTime, composeRGBPixelWeight );
    printf("[DS]%25s: %f (w=%.1f)\n", "HistogramRect", histogramRectTime, histogramRectWeight );
    printf("[DS]%25s: %f (w=%.1f)\n", "ThresholdRectToPix", thresholdRectToPixTime, thresholdRectToPixWeight );
    printf("[DS]%25s: %f (w=%.1f)\n", "getLineMasksMorph", getLineMasksMorphTime, getLineMasksMorphWeight );
    printf("[DS]%25s: %f\n", "Score", ((TessDeviceScore *)device->score)->time );
    return DS_SUCCESS;
}

// initial call to select device
ds_device OpenclDevice::getDeviceSelection( ) {