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GNU Octave 3.8.1 with ACML 6 on Ubuntu 13.10 does not seem to use iGPU on Kaveri platform.

Question asked by bsp2020 on Apr 28, 2014
Latest reply on May 1, 2014 by kknox

I'm trying to get GNU Octave 3.8.1 with ACML 6 on Ubuntu 13.10 to use iGPU of Kaveri. However, it does not seem to work. I was able to build Octave to use ACML mp (ACML and iGPU of Kaveri) but its performance is the same whether I have Catalyst driver installed or not. Below is clinfo output and the performance number I got. I'd really like to get the iGPU working and compare the performance and appreciate any help.

 

clinfo output

$ clinfo

Number of platforms: 1

  Platform Profile: FULL_PROFILE

  Platform Version: OpenCL 1.2 AMD-APP (1445.5)

  Platform Name: AMD Accelerated Parallel Processing

  Platform Vendor: Advanced Micro Devices, Inc.

  Platform Extensions: cl_khr_icd cl_amd_event_callback cl_amd_offline_devices cl_amd_hsa

   

  Platform Name: AMD Accelerated Parallel Processing

Number of devices: 2

  Device Type: CL_DEVICE_TYPE_GPU

  Vendor ID: 1002h

  Board name: AMD Radeon(TM) R7 Graphics

  Device Topology: PCI[ B#0, D#1, F#0 ]

  Max compute units: 8

  Max work items dimensions: 3

    Max work items[0]: 256

    Max work items[1]: 256

    Max work items[2]: 256

  Max work group size: 256

  Preferred vector width char: 4

  Preferred vector width short: 2

  Preferred vector width int: 1

  Preferred vector width long: 1

  Preferred vector width float: 1

  Preferred vector width double: 1

  Native vector width char: 4

  Native vector width short: 2

  Native vector width int: 1

  Native vector width long: 1

  Native vector width float: 1

  Native vector width double: 1

  Max clock frequency: 900Mhz

  Address bits: 32

  Max memory allocation: 289406976

  Image support: Yes

  Max number of images read arguments: 128

  Max number of images write arguments: 8

  Max image 2D width: 16384

  Max image 2D height: 16384

  Max image 3D width: 2048

  Max image 3D height: 2048

  Max image 3D depth: 2048

  Max samplers within kernel: 16

  Max size of kernel argument: 1024

  Alignment (bits) of base address: 2048

  Minimum alignment (bytes) for any datatype: 128

  Single precision floating point capability

    Denorms: No

    Quiet NaNs: Yes

    Round to nearest even: Yes

    Round to zero: Yes

    Round to +ve and infinity: Yes

    IEEE754-2008 fused multiply-add: Yes

  Cache type: Read/Write

  Cache line size: 64

  Cache size: 16384

  Global memory size: 1157627904

  Constant buffer size: 65536

  Max number of constant args: 8

  Local memory type: Scratchpad

  Local memory size: 32768

  Kernel Preferred work group size multiple: 64

  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: No

  Queue properties:

    Out-of-Order: No

    Profiling : Yes

  Platform ID: 0x00007fcb9b1c8080

  Name: Spectre

  Vendor: Advanced Micro Devices, Inc.

  Device OpenCL C version: OpenCL C 1.2

  Driver version: 1445.5 (VM)

  Profile: FULL_PROFILE

  Version: OpenCL 1.2 AMD-APP (1445.5)

  Extensions: cl_khr_fp64 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_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_atomic_counters_32 cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_image2d_from_buffer cl_khr_spir cl_khr_gl_event

   

  Device Type: CL_DEVICE_TYPE_CPU

  Vendor ID: 1002h

  Board name:

  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: 8

  Preferred vector width double: 4

  Native vector width char: 16

  Native vector width short: 8

  Native vector width int: 4

  Native vector width long: 2

  Native vector width float: 8

  Native vector width double: 4

  Max clock frequency: 1700Mhz

  Address bits: 64

  Max memory allocation: 2147483648

  Image support: Yes

  Max number of images read arguments: 128

  Max number of images write arguments: 8

  Max image 2D width: 8192

  Max image 2D height: 8192

  Max image 3D width: 2048

  Max image 3D height: 2048

  Max image 3D depth: 2048

  Max samplers within kernel: 16

  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: Yes

  Cache type: Read/Write

  Cache line size: 64

  Cache size: 16384

  Global memory size: 7184535552

  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: 0x00007fcb9b1c8080

  Name: AMD A10-7850K APU with Radeon(TM) R7 Graphics

  Vendor: AuthenticAMD

  Device OpenCL C version: OpenCL C 1.2

  Driver version: 1445.5 (sse2,avx,fma4)

  Profile: FULL_PROFILE

  Version: OpenCL 1.2 AMD-APP (1445.5)

  Extensions: cl_khr_fp64 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_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_spir cl_amd_svm cl_khr_gl_event

 

Some performance number I got.

Linux Default BLAS/LAPACK ->

octave:1> a = rand(5000,5000,"single");

octave:2> tic();svd(a);elapsed_time = toc()

elapsed_time =  59.904

octave:3> tic();a*a;elapsed_time = toc()

elapsed_time =  15.024

octave:4> a = rand(5000,5000);

octave:5> tic();svd(a);elapsed_time = toc()

elapsed_time =  132.46

octave:6> tic();a*a;elapsed_time = toc()

elapsed_time =  28.595

 

 

ACML:no GPU ->

octave:1> a = rand(5000,5000,"single");

octave:2> tic();svd(a);elapsed_time = toc()

elapsed_time =  49.774

octave:3> tic();a*a;elapsed_time = toc()

elapsed_time =  5.6783

octave:4> a = rand(5000,5000);

octave:5> tic();svd(a);elapsed_time = toc()

elapsed_time =  82.735

octave:6> tic();a*a;elapsed_time = toc()

elapsed_time =  11.423

 

ACML_mp:with and without GPU (with and without Catalyst 14.04 installed) ->

octave:1> a = rand(5000,5000,"single");

octave:2> tic();svd(a);elapsed_time = toc()

elapsed_time =  27.879

octave:3> tic();a*a;elapsed_time = toc()

elapsed_time =  2.4581

octave:4> a = rand(5000,5000);

octave:5> tic();svd(a);elapsed_time = toc()

elapsed_time =  52.070

octave:6> tic();a*a;elapsed_time = toc()

elapsed_time =  5.0666

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