Re: [boost] [compute] [OS X 10.11.5] [GeForce GT 750M] Segmentation fault

Subject: Re: [boost] [compute] [OS X 10.11.5] [GeForce GT 750M] Segmentation fault
From: Kyle Lutz (kyle.r.lutz_at_[hidden])
Date: 2016-05-25 01:12:02

On Sun, May 22, 2016 at 10:32 PM, Prashant <prashant.thakre_at_[hidden]> wrote:
> Hi,
>    Am trying to sort a vector on GPU (GeForce GT 750M) using example code which generates  SEGV.
>    However, it runs fine on Iris Pro (Intel(R) Core(TM) i7-4850HQ CPU).
>
>    We observe SEGV when size is 10 million.
>    When the size is 5 million, following exception is thrown:
> boost/1_61_0/include/boost/compute/command_queue.hpp(453): Throw in function
>  boost::compute::event boost::compute::command_queue::enqueue_write_buffer(const
>  boost::compute::buffer &, size_t, size_t, const void *, const boost::compute::wait_list
>  &) Dynamic exception type:
>  boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<
>    boost::compute::opencl_error> > std::exception::what: Invalid Value
>
>     Another observation: if the size of vector is 50 million the sorting works fine,
> though the timings are worse than Iris Pro.
>     Also, when is size is 100 million, the binary causes the OS to crash.
>
>    Compiler details:
>     clang++ --version
>     Apple LLVM version 7.3.0 (clang-703.0.31)
>     Target: x86_64-apple-darwin15.5.0
>     Thread model: posix
>
>    OS:
>     System Version:     OS X 10.11.5 (15F34)
>     Kernel Version:     Darwin 15.5.0

Thanks for the report. I see you've also opened an issue [1] on
GitHub, I'll follow up there.

-kyle

[1] https://github.com/boostorg/compute/issues/615