Hi, anyone who cares
I meet with memory leak when calling clEnqueueNDRangeKernel in a deadloop using amd card, below case I used an empty kernel, but I think this issue is not because of my empty kernel, I ever use matrix add/mul kernel and kernel execution results are right but still meet memory leak.
my code looks as below:
-----------------------------------------code start------------------------------------------------------------------
do {
for (i = 0; i < ciDeviceCount; ++i) {
ciErrNum = clEnqueueNDRangeKernel(commandQueue, matrixEqual, 2, 0, globalWorkSize, localWorkSize,
0, NULL, &GPUExecution);
oclCheckError(ciErrNum, CL_SUCCESS);
ciErrNum = clFinish(commandQueue);
oclCheckError(ciErrNum, CL_SUCCESS);
}
} while(1);
-----------------------------------------code end----------------------------------------------------------------------
and my kernel is an empty kernel
-----------------------------------------code start------------------------------------------------------------------
__kernel void
matrixEqual(int m, int n)
{
m = n;
}
-----------------------------------------code end----------------------------------------------------------------------
after run many loops, my process's memory consuming rising to 7g and finally killed by the linux kernel.
In /var/log/syslog, it showed that kernel kill the process because out of memory.
snd kernel: [ 8779.289654] Out of memory: Kill process 5239 (myprocess) score 917 or sacrifice child
OS version:
Linux snd 4.10.0-42-generic #46~16.04.1-Ubuntu SMP Mon Dec 4 15:57:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Part of clinfo:
Platform Version: OpenCL 2.0 AMD-APP (2482.3)
Platform ID: 0x7f19c67e1098
Name: Ellesmere
Vendor: Advanced Micro Devices, Inc.
Device OpenCL C version: OpenCL C 1.2
Driver version: 2482.3
Profile: FULL_PROFILE
Version: OpenCL 1.2 AMD-APP (2482.3)
Device Type: CL_DEVICE_TYPE_GPU
Vendor ID: 1002h
Board name: Radeon RX 570 Series
Hardware
2 cores Intel(R) Celeron(R) CPU G3930 @ 2.90GHz
8 cards Radeon RX 570 Series
I also attach the full code to the post.
