Reported to the GCC maintainers:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110156
037...@bugs.debian.org>
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thread arena and
memory leak
I've managed to find a workaround. Not a great workaround, but it seems to let
me take advantage of all cores for OMP without penalty. I'll be running some
more tests on that.
The thread needs t
I've managed to find a workaround. Not a great workaround, but it seems to let
me take advantage of all cores for OMP without penalty. I'll be running some
more tests on that.
The thread needs to call:
#include
omp_pause_resource_all(omp_pause_soft);
at thread termination (a hard
On Mon, 5 Jun 2023, Beauregard,Christophe (ECCC) wrote:
FWIW, I think I may have figured out what's happening. It's probably
something to note in the http://www.graphicsmagick.org/OpenMP.html
documentation.
In a nutshell, my understanding is that libgomp keeps track of its
thread pool in
5, 2023 08:58
To: László Böszörményi (GCS) ; Bob Friesenhahn
; 1037...@bugs.debian.org
<1037...@bugs.debian.org>
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thread arena and
memory leak
>Do you think it might be a problem with another system component, a
GCC optimization
; 1037...@bugs.debian.org
<1037...@bugs.debian.org>
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thread arena and
memory leak
>Do you think it might be a problem with another system component, a
GCC optimization or this is fixed meanwhile?
I'm not sure. It took me most of a week to e
ers, etc.
c.
From: László Böszörményi (GCS)
Sent: Sunday, June 4, 2023 06:25
To: Bob Friesenhahn ; 1037...@bugs.debian.org
<1037...@bugs.debian.org>
Cc: Beauregard,Christophe (ECCC)
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thr
My own testing is under Ubuntu 20.04 using GCC 10.
Do you think it might be a problem with another system component, a
GCC optimization or this is fixed meanwhile? At least I do wonder why
this issue is CPU / machine dependent.
As a further data point, I compiled the test program under
On Sun, 4 Jun 2023, László Böszörményi wrote:
Hi,
On Sat, Jun 3, 2023 at 8:30 PM Bob Friesenhahn
wrote:
I am definitely able to confirm that memory consumption builds due to
invoking GetImageDepth() via a POSIX thread. The rate that it builds
is image sensitive since some images cause
Hi,
On Sat, Jun 3, 2023 at 8:30 PM Bob Friesenhahn
wrote:
> I am definitely able to confirm that memory consumption builds due to
> invoking GetImageDepth() via a POSIX thread. The rate that it builds
> is image sensitive since some images cause GetImageDepth() to perform
> more OpenMP loops.
I am definitely able to confirm that memory consumption builds due to
invoking GetImageDepth() via a POSIX thread. The rate that it builds
is image sensitive since some images cause GetImageDepth() to perform
more OpenMP loops.
In /proc/PID/smaps I see multiple memory-mapped regions
I did manage to get the test program compiled on my PC (a laptop).
It was challenging since the source code (extracted from email) seemed
to have hidden characters in it that the C compiler did not like.
I do see the reported RSS very gradually creeping up. It seems to go
up and then go back
32
To: Bob Friesenhahn ; 1037...@bugs.debian.org
<1037...@bugs.debian.org>
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thread arena and
memory leak
I'm kind of stuck with this version of GM; my organization is currently
tracking Debian LTS.
I suppose I should have added
my sanity.
From: Bob Friesenhahn
Sent: Friday, June 2, 2023 14:38
To: Beauregard,Christophe (ECCC) ;
1037...@bugs.debian.org <1037...@bugs.debian.org>
Subject: Re: Bug#1037042: graphicsmagick: GetImageDepth has a thread arena and
memory leak
[You don't often get
Christophe,
It would be good to test a modern GM version which supports "resource
limited memory". Probably Debian's 1.4 version supports that.
For a version which supports the resource limited memory allocator,
you can set 'MAGICK_DEBUG=resource' in the environment prior to
running the
Package: graphicsmagick
Version: 1.4+really1.3.36+hg16481-2+deb11u1
Severity: normal
Tags: upstream
The GraphicsMagick API has a thread arena and more general memory leak
somewhere in the GetImageDepth() API call, presumably a side-effect of
the OpenMP usage.
First, you need a server class
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