[Llvm-bgq-discuss] Node implementation of std::chrono::system_clock?

[Hal Finkel]

Hi Antonin,

Great! The fix is also in r266865-stable-3.

 -Hal

----- Original Message -----
> From: "Antonin Portelli" <antonin.portelli at ed.ac.uk>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: llvm-bgq-discuss at lists.alcf.anl.gov
> Sent: Friday, May 20, 2016 7:28:10 AM
> Subject: Re: [Llvm-bgq-discuss] Node implementation of std::chrono::system_clock?
> 
> Dear Hal,
> 
> I have run my minimal example with r270049-20160519 and I can confirm
> that now it outputs correctly the timings. Thank you very much for
> correcting that so quickly.
> 
> Best,
> 
> Antonin
> 
> > On 19 May 2016, at 14:44, Hal Finkel <hfinkel at anl.gov> wrote:
> > 
> > Hi Antonin,
> > 
> > This is fixed in the latest nightly build (r270049-20160519), and
> > I'll pull the change into the next stable patch release soon.
> > 
> > -Hal
> > 
> > ----- Original Message -----
> >> From: "Antonin Portelli" <antonin.portelli at ed.ac.uk>
> >> To: llvm-bgq-discuss at lists.alcf.anl.gov
> >> Sent: Wednesday, May 18, 2016 10:54:07 AM
> >> Subject: [Llvm-bgq-discuss] Node implementation of
> >> std::chrono::system_clock?
> >> 
> >> Dear bgclang maintainers,
> >> 
> >> First let me thank you for making clang so easily available for
> >> BG/Q.
> >> I am struggling to run a code doing some timings using the C++11
> >> function std::chrono::system_clock::now(). If I run the code on a
> >> BG/Q node it throws a std::system_error exception with an empty
> >> message. I just wanted to if by any chance you were aware of this
> >> issue?
> >> 
> >> I wrote the following minimal example to isolate the problem:
> >> 
> >> #include <chrono>
> >> #include <iostream>
> >> #include <numeric>
> >> #include <vector>
> >> 
> >> using namespace std;
> >> 
> >> int main(void)
> >> {
> >>    auto start = chrono::system_clock::now();
> >>    std::vector<int> v(100000, 42);
> >>    auto sink = std::accumulate(v.begin(), v.end(), 0u);
> >>    auto end = chrono::system_clock::now();
> >>    std::chrono::duration<double> diff = end-start;
> >>    cout << diff.count() << endl;
> >> 
> >>    return 0;
> >> }
> >> 
> >> It runs well when compiled for the frontend but crashes throwing
> >> std::system_error when compiled & run on a node, the backtrace is
> >> the following:
> >> 
> >> 0 :Node (25)
> >> 1 :    <traceback not fetched> (1)
> >> 1 :    0000000000000000 (24)
> >> 2 :        .__libc_start_main (24)
> >> 3 :            .generic_start_main (24)
> >> 4 :                .main (24)
> >> 5 :                    .std::__1::chrono::system_clock::now() (24)
> >> 6 :                        .std::__1::__throw_system_error(int,
> >> char
> >> const*) (24)
> >> 7 :                            .__cxa_throw (24)
> >> 8 :                                .std::terminate() (24)
> >> 9 :
> >>                                    .__cxxabiv1::__terminate(void
> >> (*)()) (24)
> >> 10:
> >>                                       .__gnu_cxx::__verbose_terminate_handler()
> >> (24)
> >> 11:                                            .abort (24)
> >> 
> >> Best regards,
> >> 
> >> Antonin Portelli
> >> --
> >> The University of Edinburgh is a charitable body, registered in
> >> Scotland, with registration number SC005336.
> >> 
> >> _______________________________________________
> >> llvm-bgq-discuss mailing list
> >> llvm-bgq-discuss at lists.alcf.anl.gov
> >> https://lists.alcf.anl.gov/mailman/listinfo/llvm-bgq-discuss
> >> 
> > 
> > --
> > Hal Finkel
> > Assistant Computational Scientist
> > Leadership Computing Facility
> > Argonne National Laboratory
> > 
> 
> 
> --
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
> 
> 

-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory