CL_DEVICE_MAX_WORK_ITEM_SIZES Error 30

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi everybody,

to debug my program I try to get some information from the gpu. Unfortunately I get an error when I try to find out [font=“Courier New”]CL_DEVICE_MAX_WORK_ITEM_SIZES[/font]. The error# is 30, which means [font=“Courier New”]CL_INVALID_VALUE[/font]

This is my code:

[codebox]size_t workgroupsize;

cl_uint devicedata;

size_t maxitems[1];

clGetKernelWorkGroupInfo(*cl_forward1,GPUDevices[0], CL_KERNEL_WORK_GROUP_SIZE, sizeof(size_t), &workgroupsize, NULL);

printf(“\nCL_KERNEL_WORK_GROUP_SIZE:%i\n”,workgroupsize);

clGetDeviceInfo(GPUDevices[0], CL_DEVICE_ADDRESS_BITS, sizeof(cl_uint), &devicedata, NULL);

printf(“\nCL_DEVICE_ADDRESS_BITS:%i\n”,devicedata);

_err= clGetDeviceInfo(GPUDevices[0], CL_DEVICE_MAX_WORK_ITEM_SIZES, sizeof( maxitems), &maxitems, NULL);

printf(“\nCL_DEVICE_MAX_WORK_ITEM_SIZES:%i + error=%i\n”,maxitems[0],_err);

_err= clGetDeviceInfo(GPUDevices[0], CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof( maxitems), &maxitems, NULL);

printf(“\nCL_DEVICE_MAX_WORK_GROUP_SIZE:%i + error=%i\n”,maxitems[0],_err); [/codebox]

And this is the output:

[codebox]CL_KERNEL_WORK_GROUP_SIZE:512

CL_DEVICE_ADDRESS_BITS:32

CL_DEVICE_MAX_WORK_ITEM_SIZES:42331 + error=-30

CL_DEVICE_MAX_WORK_GROUP_SIZE:512 + error=0

[/codebox]

What could be the cause of this error?

Thank you

2

Hi everybody,

to debug my program I try to get some information from the gpu. Unfortunately I get an error when I try to find out [font=“Courier New”]CL_DEVICE_MAX_WORK_ITEM_SIZES[/font]. The error# is 30, which means [font=“Courier New”]CL_INVALID_VALUE[/font]

This is my code:

[codebox]size_t workgroupsize;

cl_uint devicedata;

size_t maxitems[1];

clGetKernelWorkGroupInfo(*cl_forward1,GPUDevices[0], CL_KERNEL_WORK_GROUP_SIZE, sizeof(size_t), &workgroupsize, NULL);

printf(“\nCL_KERNEL_WORK_GROUP_SIZE:%i\n”,workgroupsize);

clGetDeviceInfo(GPUDevices[0], CL_DEVICE_ADDRESS_BITS, sizeof(cl_uint), &devicedata, NULL);

printf(“\nCL_DEVICE_ADDRESS_BITS:%i\n”,devicedata);

_err= clGetDeviceInfo(GPUDevices[0], CL_DEVICE_MAX_WORK_ITEM_SIZES, sizeof( maxitems), &maxitems, NULL);

printf(“\nCL_DEVICE_MAX_WORK_ITEM_SIZES:%i + error=%i\n”,maxitems[0],_err);

_err= clGetDeviceInfo(GPUDevices[0], CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof( maxitems), &maxitems, NULL);

printf(“\nCL_DEVICE_MAX_WORK_GROUP_SIZE:%i + error=%i\n”,maxitems[0],_err); [/codebox]

And this is the output:

[codebox]CL_KERNEL_WORK_GROUP_SIZE:512

CL_DEVICE_ADDRESS_BITS:32

CL_DEVICE_MAX_WORK_ITEM_SIZES:42331 + error=-30

CL_DEVICE_MAX_WORK_GROUP_SIZE:512 + error=0

[/codebox]

What could be the cause of this error?

Thank you

3

So, working on it more, it seems like the error 30 was caused by the variable [font=“Courier New”]size_t maxitems[1][/font]; being of the wrong size.

Correct would be [font=“Courier New”]maxitems[3][/font], as [font=“Courier New”]CL_DEVICE_MAX_WORK_ITEM_SIZES[/font] and [font=“Courier New”]CL_DEVICE_MAX_WORK_GROUP_SIZE[/font] return a [font=“Courier New”]size_t[/font] of the size 3.

4

So, working on it more, it seems like the error 30 was caused by the variable [font=“Courier New”]size_t maxitems[1][/font]; being of the wrong size.

Correct would be [font=“Courier New”]maxitems[3][/font], as [font=“Courier New”]CL_DEVICE_MAX_WORK_ITEM_SIZES[/font] and [font=“Courier New”]CL_DEVICE_MAX_WORK_GROUP_SIZE[/font] return a [font=“Courier New”]size_t[/font] of the size 3.