Extra cudaStreamCreate/cudaStreamDestroy

[mnicely]

System information (version)

• OpenCV => 4.2.0-dev
• Operating System / Platform => Ubuntu 18.04
• Compiler => GNU G++ 7.4.0
• Python => 3.6.9

Detailed description

When I run self.frame_device.upload(self.frame, stream) I'm getting an extra cudaStreamCreate and cudaStreamDestroy right before the cudaMemcpy2DAsync. (See attached)

Steps to reproduce

import os
import sys
import glob
import numpy as np
import time
import cv2
import cudasift

class PreCuda:
    def __init__(self, size):
        print("__init__")
        self.rows = size
        self.cols = size
        self.stream = cv2.cuda_Stream( )
        self.frame = np.zeros((size,size,3),np.uint8)
        cv2.cuda.registerPageLocked(self.frame)
        self.frame_device = cv2.cuda_GpuMat(size,size,cv2.CV_8UC3)

    def __del__(self):
        print("unregisterPageLocked")
        cv2.cuda.unregisterPageLocked(self.frame)

    def ProcessFrame(self):
        print("ProcessFrame")
        self.frame_device.upload(self.frame, self.stream) # <-- issue

    def Frame(self, img):
        print("Frame")
        img = cv2.imread(image_name)
        img.resize(self.rows, self.cols, 3)
        np.copyto(self.frame,img)

image_names = glob.glob('images/*')


size = 512
image_data = PreCuda(size)

for image_name in image_names:
    image_data.Frame(image_name)
    image_data.ProcessFrame()

-->

[r2d3]

Hello Matthew @mnicely,

you could verify the latest version of OpenCV master, it integrates my patch that solves this issue. And confirm that this is solving the issue for you too.

Regards

David

[mnicely]

Hi @r2d3
Unfortunately, that task is not active and it might be awhile before I can circle back. I'm fine with closing this.