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[FangQ]

I am trying to debug an OpenCL kernel translated from a CUDA code. In the CUDA code, I defined a macro:

#ifdef __DEVICE_EMULATION__
#define GPUDEBUG(x)        printf x
#else
#define GPUDEBUG(x)
#endif

to enable printing under device emulation mode. When I ran the translated unit on ATI stream sdk, I can not find a macro similar to "__DEVICE_EMULATION__".

printf does work when using CPU device, but will crash for GPU devices.

I am curious if there is such a macro so that I can keep my debug approach. Or if there is an alternative?

thank you

[nou]

you can define it manualy.

clBuildProgram(prog, NULL, NULL, "-D __DEVICE_EMULATION__", NULL, NULL);

[FangQ]

Originally posted by: nou you can define it manualy.

clBuildProgram(prog, NULL, NULL, "-D __DEVICE_EMULATION__", NULL, NULL);

thank you, it works

[pavandsp]

I tried by defining

clBuildProgram(prog, NULL, NULL, "-D __DEVICE_EMULATION__", NULL, NULL);

in host app and

#ifdef __DEVICE_EMULATION__
#define GPUDEBUG(x)        printf x
#else
#define GPUDEBUG(x)
#endif

in kernel.

I am unable to Build because of this.

error: expected a ";"
 GPUDEBUG("Hello  Print \n");

and  warning: expression has no effect
  GPUDEBUG("Hello Print\n");

Please let me know for any modifications needed. i am working in ATI GPU HD 4350.

[nou]

try this #define GPUDEBUG(x)        printf(x)

[pavandsp]

nou,

I tried but its not building.have you tried in ATI Radeon GPU. I am working on RV710.

[nou]

printf is working only on CPU device.

[pavandsp]

But Mr FangQ says its working in above messages.I guess he tested in ATI Radeon only.

[omkaranathan]

Pavan,

printf is not supported in GPU.

[pavandsp]

Hi Omkar,

Thanks for the conclusion.