bugGNU Octave - Bugs: bug #64249, Segment fault while integrating...


bug #64249: Segment fault while integrating clBlast lib to an Octave package

Submitter:  None
Submitted:  Thu 25 May 2023 09:58:40 AM UTC
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Invalid Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  * Closed Release:  * 8.2.0 8.X Series Bug Fix Release
Operating System:  * GNU/Linux Fixed Release:  None
Planned Release:  None
* Mandatory Fields

Add a New Comment (Rich Markup)

Sat 27 May 2023 01:48:26 PM UTC, comment #2: 

IIUC, this was caused by an issue in clBlast and it's not a bug in Octave.

Closing as invalid

Markus M├╝tzel <mmuetzel>
Group Member
Sat 27 May 2023 12:08:56 PM UTC, comment #1: 

Dear manager,
I have located the problem and reported in CLBlast. Please mark this bug as solved.

Thank you very much!

Best wishes,
Jinchuan Tang

Jinchuan Tang <jinchuantang>
Thu 25 May 2023 09:58:40 AM UTC, original submission:  

Dear Octave Dev team,

I was trying to integrating clBlast library to an Octave package named Octave-ocl. By doing this, I am hoping that I could bring the GPU speed up on GEMM to Octave. I adapted an SGEMM example to the original Octave-ocl package, and add the library to the makefile (-L/home/tjc/Downloads/CLBlast-master/build -lclblast). But every time I execute the corresponding command on Octave after installation, I encountered segment fault on OpenSUSE. (
fatal: caught signal Segmentation fault -- stopping myself...
Segmentation fault (core dumped)) In the meantime, I tried the similar step in Windows, it also fails.

Is there something wrong with my adding commands (-L/home/tjc/Downloads/CLBlast-master/build -lclblast) in the makefile for an Octave package?

I tried to use verbose mode with clBlast, and there was no errors before segmentation errors (https://github.com/CNugteren/CLBlast/issues/478).

Best wishes,

TARGET = ocl_b1n.oct

  oclArray.m \
  ocl_to_octave.m \
  gpuArray.m \
  gather.m \
  ocl_program_file.m \

  ocl_constant.o \
  ocl_lib.o \
  ocl_context.o \
  ocl_context_obj.o \
  ocl_program.o \
  ocl_memobj.o \
  ocl_array.o \
  ocl_array_prog.o \
  ocl_ov_matrix.o \
  ocl_ov_matrix_ops.o \
  ocl_ov_matrix_fcns.o \
  ocl_ov_program.o \
  ocl_ov_types.o \
  genFFT.o \
  fftCore.o \
  transform.o \
  accessors.o \
  plan.o \
  repo.o \
  generator_stockham.o \
  generator_transpose_gcn.o \
  generator_transpose.o \
  action_transpose.o \
  generator_copy.o \
  lifetime.o \
  fft_binary_lookup.o \
  md5sum.o \
  enqueue.o \

C_FILES = $(OBJ_FILES:.o=.cc)


# main target

$(LD) $(OBJ_FILES) -L/home/tjc/Downloads/CLBlast-master/build -lclblast -o $(TARGET)

.SUFFIXES= .cc .o

$(CC)  -pipe -c -std=gnu++11 $<



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  • -email is unavailable- added by mmuetzel (Posted a comment)
  • -email is unavailable- added by jinchuantang (Posted a comment)

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2023-05-27 mmuetzel StatusNone Invalid
        Open/ClosedOpen Closed

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