ansoncat

HelloCL get segmentation fault on CPU

Discussion created by ansoncat on Jan 6, 2011
Latest reply on Jan 7, 2011 by pulec

Hi,

On my computer, the sample program HelloCL get segmentation fault while running on a CPU device.

Here are output messages:


HelloCL!

Getting Platform Information

Creating a context AMD platform

Getting device info

Loading and compiling CL source

Segmentation fault

Segmentation fault is gone when I try to use GDB to debug it.

I have no idea what may happened.

Testing environment I used : 

Ubuntu 10.10 32-bit + Stream SDK 2.2/2.3 + Core i5 520M + Geforce 310M (nvidia ICD is removed)

Here are info dump by CLInfo:

 


 

Number of platforms: 1

  Platform Profile: FULL_PROFILE

  Platform Version: OpenCL 1.1 ATI-Stream-v2.3 (451)

  Platform Name: ATI Stream

  Platform Vendor: Advanced Micro Devices, Inc.

  Platform Extensions: cl_khr_icd cl_amd_event_callback cl_amd_offline_devices

  Platform Name: ATI Stream

Number of devices: 1

  Device Type: CL_DEVICE_TYPE_CPU

  Device ID: 4098

  Max compute units: 4

  Max work items dimensions: 3

    Max work items[0]: 1024

    Max work items[1]: 1024

    Max work items[2]: 1024

  Max work group size: 1024

  Preferred vector width char: 16

  Preferred vector width short: 8

  Preferred vector width int: 4

  Preferred vector width long: 2

  Preferred vector width float: 4

  Preferred vector width double: 0

  Native vector width char: 16

  Native vector width short: 8

  Native vector width int: 4

  Native vector width long: 2

  Native vector width float: 4

  Native vector width double: 0

  Max clock frequency: 2400Mhz

  Address bits: 32

  Max memory allocation: 536870912

  Image support: No

  Max size of kernel argument: 4096

  Alignment (bits) of base address: 1024

  Minimum alignment (bytes) for any datatype: 128

  Single precision floating point capability

    Denorms: Yes

    Quiet NaNs: Yes

    Round to nearest even: Yes

    Round to zero: Yes

    Round to +ve and infinity: Yes

    IEEE754-2008 fused multiply-add: No

  Cache type: Read/Write

  Cache line size: 64

  Cache size: 32768

  Global memory size: 1073741824

  Constant buffer size: 65536

  Max number of constant args: 8

  Local memory type: Global

  Local memory size: 32768

  Kernel Preferred work group size multiple: 1

  Error correction support: 0

  Unified memory for Host and Device: 1

  Profiling timer resolution: 1

  Device endianess: Little

  Available: Yes

  Compiler available: Yes

  Execution capabilities:  

    Execute OpenCL kernels: Yes

    Execute native function: Yes

  Queue properties:  

    Out-of-Order: No

    Profiling : Yes

  Platform ID: 0xb74fcb80

  Name: Intel(R) Core(TM) i5 CPU       M 520  @ 2.40GHz

  Vendor: GenuineIntel

  Driver version: 2.0

  Profile: FULL_PROFILE

  Version: OpenCL 1.1 ATI-Stream-v2.3 (451)

  Extensions: cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_media_ops cl_amd_popcnt cl_amd_printf 

 


 

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