A gcc implementation of OpenMP.
The GNU Offloading and Multi Processing Runtime Library is an implementation of OpenMP for the GNU C Compiler (gcc). https://gcc.gnu.org/projects/gomp/
Questions tagged [libgomp]
32 questions
13
votes
4 answers
Xgboost throws an error when trying to import
I have a project that is using xgboost. We now transfer the project to containers.
But after installing it using pip, it throws the following error:
Traceback (most recent call last):
File "restart_db.py", line 5, in
from…
NotSoShabby
- 3,316
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10
votes
3 answers
Telling GCC to *not* link libgomp so it links libiomp5 instead
I need to figure out a compiler/linker directive I can feed into gcc so that it won't automatically link libgomp when -fopenmp is specified.
The reason is that I'm trying to build against Intel's MKL BLAS. MKL requires adding a separate Intel…
Bob
- 1,274
- 1
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6
votes
2 answers
OpenMP + linux - GOMP_4.0 not found
I've been trying to compile a program which uses OpenMP on suse with gcc --version 4.9.4
> g++ -std=c++11 -o a.exe -fopenmp ./file.cpp
> ./a.exe
./a.exe: /usr/lib64/libgomp.so.1: version `GOMP_4.0' not found
(required by ./a.exe)
I have a file…
Yurkee
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5
votes
1 answer
Support for OMPT in mainstream compilers?
The OpenMP specification from version 5.0 defines the OMPT interface to allow external tools to query the openmp runtime.
I wanted to give it a try but i am really confused about how mainstream compilers actually support this.
GCC-11 claims to have…
user1551605
- 166
- 9
5
votes
4 answers
segmentation fault when using omp parallel for, but not sequentially
I'm having trouble using the #pragma omp parallel for
Basically I have several hundred DNA sequences that I want to run against an algorithm called NNLS.
I figured that doing it in parallel would give me a pretty good speed up, so I applied the…
MutantTurkey
- 536
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- 14
2
votes
2 answers
OpenMP: "libgomp: Thread creation failed: Resource temporarily unavailable" when code run as regular user
When I run the following example code:
#include "stdio.h"
#include
int main(int argc, char *argv[])
{
#pragma omp parallel
{
int NCPU,tid,NPR,NTHR;
/* get the total number of CPUs/cores available for OpenMP */
NCPU =…
conk
- 57
- 1
- 1
- 9
2
votes
0 answers
OpenMP not seeing all the CPUs
I use OpenMP with MinGW on Windows. GCC version 7.2.0 x86-64-posix-sev-rev1, Built by MinGW-W64 project.
On a computer with 2 x Xeon E5-2699 V4 running Windows Server 2016. I am running:
printf("%d ", omp_get_num_procs());
printf("%d ",…
Piotr Lopusiewicz
- 2,514
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2
votes
1 answer
Objdump disassemble doesn't match source code
I'm investigating the execution flow of a OpenMP program linked to libgomp. It uses the #pragma omp parallel for. I already know that this construct becomes, among other things, a call to GOMP_parallel function, which is implemented as…
Márcio Jales
- 205
- 1
- 8
2
votes
0 answers
Camb error with "GOMP 4.0"
I'm trying to use CAMB in jupyter notebook, so I used the first part of the CAMB demo code:
%matplotlib inline
import sys, platform, os
from matplotlib import pyplot as plt
import numpy as np
#uncomment this if you are running…
Xoca
- 23
- 4
2
votes
1 answer
How can I separately build and develop libgomp (openMP runtime)?
I am trying to make changes to the openMP runtime library (GOMP). As far as I know, the library comes with GCC compiler but my goal is to work on GOMP alone. So I wonder how I can build and develop GOMP separately from GCC. Any help would be highly…
Nabil
- 23
- 4
2
votes
0 answers
is it possible to change the OpenMP scheduler for tasks?
Can I provide an implementation specific scheduler? If so, is there some documentation about how to do it?
Dervin Thunk
- 19,515
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1
vote
1 answer
libgomp: Thread creation failed: Resource temporarily unavailable OpenMP parallel Merge Sorting
I am new to OpenMP. I was trying to implement a parallel version of merge sorting. The code of my serial implementation is the same of this, but I did not use the parallelMergeSort function.
My parallel implementation is the following:
//PARALLEL…
CasellaJr
- 378
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1
vote
2 answers
[AZURE]OSError: libgomp.so.1: cannot open shared object file: No such file or directory
[Hosted on Azure App Services] Container crashing due to this error:
2021-07-05T20:06:22.251645248Z [2021-07-05 20:06:22 +0000] [39] [ERROR] Exception in worker process
2021-07-05T20:06:22.251697248Z Traceback (most recent call…
Avi Coomar
- 21
- 2
1
vote
1 answer
Cannot understand how libgomp implements the FOR construct
According to the libgomp manual, a code in the form:
#pragma omp parallel for
for (i = lb; i <= ub; i++)
body;
becomes
void subfunction (void *data)
{
long _s0, _e0;
while (GOMP_loop_static_next (&_s0, &_e0))
{
long _e1 = _e0, i;
…
Márcio Jales
- 205
- 1
- 8
1
vote
0 answers
How to enable libgomp
When running gcc -v, --enable-libgomp is excluded.
How can I enable libgomp in gcc ?
gcc -v results:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with:…
RonTLV
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