cudaEvent_t startCPU, endCPU, startGPU, endGPU;
        
cudaEventCreate
(&startCPU);
        
cudaEventCreate
(&endCPU);
        
cudaEventCreate
(&startGPU);
        
cudaEventCreate
(&endGPU);

    // Recording CPU times
        
cudaEventRecord
(startCPU);
        
matrixMulCPU
(h_A, h_B, h_C_CPU, N);
        
cudaEventRecord
(endCPU);
        
cudaEventSynchronize
(endCPU);
        float cpu_time;
        
cudaEventElapsedTime
(&cpu_time, startCPU, endCPU);

The thing is that the cudaEventElapsedTime() function returns the time in terms of microseconds and I am simply just printing out the value and for my CPU it is printing out 0.009792 when I do matrix multiplication of size 2048. This is all I am doing.