[Piglit] [PATCH] fix CL_KERNEL_GLOBAL_WORK_SIZE bug.

[Luo, Xionghu]

Hi Tom,
According to the opencl-1.2 spec in page 165, the option CL_KERNEL_GLOBAL_WORK_SIZE for clGetKernelWorkGroupInfo should call built in kernel or custom device.

"This provides a mechanism for the
application to query the maximum global
size that can be used to execute a kernel
(i.e. global_work_size argument to
clEnqueueNDRangeKernel) on a custom
device given by device or a built-in kernel
on an OpenCL device given by device.
If device is not a custom device or kernel
is not a built-in kernel,
clGetKernelArgInfo returns the error
CL_INVALID_VALUE."

And this case called dummy kernel instead of built in kernel, so the return value is not as expected, my patch could call built in kernel to test the correct return value of option CL_KERNEL_GLOBAL_WORK_SIZE.



Luo Xionghu
Best Regards

-----Original Message-----
From: Tom Stellard [mailto:tom at stellard.net] 
Sent: Friday, September 19, 2014 10:14 PM
To: Luo, Xionghu
Cc: piglit at lists.freedesktop.org
Subject: Re: [Piglit] [PATCH] fix CL_KERNEL_GLOBAL_WORK_SIZE bug.

On Wed, Sep 17, 2014 at 06:05:12AM +0800, xionghu.luo at intel.com wrote:
> From: Luo <xionghu.luo at intel.com>
> 
> the option  CL_KERNEL_GLOBAL_WORK_SIZE for clGetKernelWorkGroupInfo 
> should call built in kernel or custom device according to the spec, 
> this patch calls the built in kernel to query the GLOBAL_WOR_SIZ.
> 

This commit message doesn't seem to match the contents of the patch.

> Signed-off-by: Luo <xionghu.luo at intel.com>
> ---
>  tests/cl/api/get-kernel-work-group-info.c |   40 ++++++++++++++++++++++++++---
>  1 file changed, 37 insertions(+), 3 deletions(-)
> 
> diff --git a/tests/cl/api/get-kernel-work-group-info.c 
> b/tests/cl/api/get-kernel-work-group-info.c
> index 47d09da..2b2c7ba 100644
> --- a/tests/cl/api/get-kernel-work-group-info.c
> +++ b/tests/cl/api/get-kernel-work-group-info.c
> @@ -60,6 +60,7 @@ piglit_cl_test(const int argc,
>  
>  	int i;
>  	cl_int errNo;
> +	cl_program built_in_prog;
>  	cl_kernel kernel;
>  
>  	size_t param_value_size;
> @@ -70,15 +71,47 @@ piglit_cl_test(const int argc,
>  	const cl_kernel_work_group_info* kernel_work_group_infos =
>  		PIGLIT_CL_ENUM_ARRAY(cl_kernel_work_group_info);
>  
> -	kernel = clCreateKernel(env->program,
> -	                        "dummy_kernel",
> -	                        &errNo);
> +	char* built_in_kernel_names;
> +	char* kernel_name;
> +	size_t built_in_kernels_size;
> +	size_t ret_sz;
> +
> +	errNo = clGetDeviceInfo(env->device_id, CL_DEVICE_BUILT_IN_KERNELS, 0, 0, &built_in_kernels_size);
> +	if(!piglit_cl_check_error(errNo, CL_SUCCESS)) {
> +		fprintf(stderr,
> +		        "Failed (error code: %s): Get Device Info.\n",
> +		        piglit_cl_get_error_name(errNo));
> +		return PIGLIT_FAIL;
> +	}
> +
> +	built_in_kernel_names = (char* )malloc(built_in_kernels_size * 
> +sizeof(char) );
> +
> +	errNo = clGetDeviceInfo(env->device_id, CL_DEVICE_BUILT_IN_KERNELS, built_in_kernels_size, (void*)built_in_kernel_names, &ret_sz);
> +	if(!piglit_cl_check_error(errNo, CL_SUCCESS)) {
> +		fprintf(stderr,
> +		        "Failed (error code: %s): Get Device Info.\n",
> +		        piglit_cl_get_error_name(errNo));
> +		return PIGLIT_FAIL;
> +	}
> +
> +	built_in_prog = 
> +clCreateProgramWithBuiltInKernels(env->context->cl_ctx, 1, 
> +&env->device_id, built_in_kernel_names, &errNo);

Won't this call fail if there are no builtin kernels?

-Tom

> +	if(!piglit_cl_check_error(errNo, CL_SUCCESS)) {
> +		fprintf(stderr,
> +		        "Failed (error code: %s): Create BuiltIn Program.\n",
> +		        piglit_cl_get_error_name(errNo));
> +		return PIGLIT_FAIL;
> +	}
> +
> +	kernel_name = strtok(built_in_kernel_names, ";");
> +
> +	kernel = clCreateKernel(built_in_prog, kernel_name,  &errNo);
>  	if(!piglit_cl_check_error(errNo, CL_SUCCESS)) {
>  		fprintf(stderr,
>  		        "Failed (error code: %s): Create kernel.\n",
>  		        piglit_cl_get_error_name(errNo));
>  		return PIGLIT_FAIL;
>  	}
> +	free(built_in_kernel_names);
>  
>  	/*** Normal usage ***/
>  	for(i = 0; i < num_kernel_work_group_infos; i++) { @@ -188,6 +221,7 
> @@ piglit_cl_test(const int argc,
>  	}
>  
>  	clReleaseKernel(kernel);
> +	clReleaseProgram(built_in_prog);
>  
>  	return result;
>  }
> --
> 1.7.9.5
> 
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