The Gstreamer plugin run slow

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Hi, I have created a GStreamer plugin. In my plugin, I add a simple test code, as follows:

long long int sum = 0;
for (long long int i=0; i< 1000; i++)
{
    for(int j=0; j< 1000000; j++)
    {
        sum = sum + i + j;
    }

}

when run in single thread in that plug-in, this part takes about 4.01s. when run in double threads, this part need takes about 8.02s.
However if I isolate to run the simple test code, that part is done in only takes about 3.78s.
why?

2

Please run tegrastats to check CPU loading.

DeepStream SDK requires high loading, and other processes may be affected.

3

We were only running DeepStream SDK at that time, it didn’t run other processes.

4

Hi,
Do you follow [Implementing a Custom Plugin] in the document? We have a custom plugin ‘dsexample’. Suggest you implement your usecase in this plugin.

Also if it is an issue in your usecase, please share a practical sample. We would like to check real usecase instead of dummy test code.

5

I have been test in the custom plugin ‘dsexample’,I add the test code in dsexample_lib.c:

DsExampleOutput *
DsExample_DequeueOutput (DsExampleCtx * ctx)
{
  DsExampleOutput *out = g_malloc0 (sizeof (DsExampleOutput));

  // Processing finished. Dequeue

  long long int sum = 0;
  double startTime;
  double endTime;
  startTime = clock();
  for (long long int i=0; i< 1000; i++)
  {
      for(int j=0; j< 1000000; j++)
      {
          sum = sum + i + j;
      }

  }
  endTime = clock();
  g_print("------%f\n", (endTime-startTime) / CLOCKS_PER_SEC;

  return out;
}

It had the same result, this part takes about 4.01s.

6

We think the code is dummy and for test only:

for (long long int i=0; i< 1000; i++)
  {
      for(int j=0; j< 1000000; j++)
      {
          sum = sum + i + j;
      }

  }

Please give real usecase.

7

Hi 940763113,

Have you clarified the cause and got performance improvement?
Any result can be shared?

Thanks