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* Re: GCC: OpenMP posix pthread
@ 2012-02-19 15:24 Erotavlas_turbo
  0 siblings, 0 replies; 7+ messages in thread
From: Erotavlas_turbo @ 2012-02-19 15:24 UTC (permalink / raw)
  To: gcc

> On 2/19/2012 9:42 AM, Erotavlas_turbo@libero.it wrote:
>
> > I'm starting to use Helgrind a tool of Valgrind. I read on the manual the following statement:
> > Runtime support library for GNU OpenMP (part of GCC), at least for GCC versions 4.2 and 4.3. The GNU OpenMP runtime library (libgomp.so) constructs its own synchronisation primitives using combinations of atomic memory instructions and the futex syscall, which causes total chaos since in Helgrind since it cannot "see" those.
> >
> > In the latest version of GCC, is this still true or now the OpenMP uses the standard POSIX pthread?
> >
>
> Do you have a specific OS family in mind?
>
>
> --
> Tim Prince
>

Yes, I'm talking about the UNIX OS (Linux, MacOSx). The tool valgrind is only available for these systems.


Salvatore Frandina


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: GCC: OpenMP posix pthread
@ 2012-03-02 20:45 Erotavlas_turbo
  0 siblings, 0 replies; 7+ messages in thread
From: Erotavlas_turbo @ 2012-03-02 20:45 UTC (permalink / raw)
  To: gcc

Hi,

I have found the solution i.e. the developers of GCC have found it. The latest version of GCC 4.6.3 can be used with Helgrind. See here for more detail http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug.html#debug.races


Best Regards

Salvatore


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: GCC: OpenMP posix pthread
@ 2012-02-22 23:43 Erotavlas_turbo
  0 siblings, 0 replies; 7+ messages in thread
From: Erotavlas_turbo @ 2012-02-22 23:43 UTC (permalink / raw)
  To: gcc

Hi,

thank you for your reply. So I cannot use the Helgrind tool without disabling the futexes. Do you know if exist a open source thread analyzer?

Thank you



^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: GCC: OpenMP posix pthread
@ 2012-02-21 15:19 Erotavlas_turbo
  2012-02-21 20:16 ` Jakub Jelinek
  0 siblings, 1 reply; 7+ messages in thread
From: Erotavlas_turbo @ 2012-02-21 15:19 UTC (permalink / raw)
  To: gcc

Nobody can answer to my question?

Thank you

Salvatore Frandina


^ permalink raw reply	[flat|nested] 7+ messages in thread
* GCC: OpenMP posix pthread
@ 2012-02-19 13:43 Erotavlas_turbo
  2012-02-19 13:53 ` Tim Prince
  0 siblings, 1 reply; 7+ messages in thread
From: Erotavlas_turbo @ 2012-02-19 13:43 UTC (permalink / raw)
  To: gcc

Hi,

I'm starting to use Helgrind a tool of Valgrind. I read on the manual the following statement:
Runtime support library for GNU OpenMP (part of GCC), at least for GCC versions 4.2 and 4.3. The GNU OpenMP runtime library (libgomp.so) constructs its own synchronisation primitives using combinations of atomic memory instructions and the futex syscall, which causes total chaos since in Helgrind since it cannot "see" those.

In the latest version of GCC, is this still true or now the OpenMP uses the standard POSIX pthread?

Thank you


^ permalink raw reply	[flat|nested] 7+ messages in thread
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2012-02-19 15:24 GCC: OpenMP posix pthread Erotavlas_turbo
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2012-03-02 20:45 Erotavlas_turbo
2012-02-22 23:43 Erotavlas_turbo
2012-02-21 15:19 Erotavlas_turbo
2012-02-21 20:16 ` Jakub Jelinek
2012-02-19 13:43 Erotavlas_turbo
2012-02-19 13:53 ` Tim Prince

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