From: "LAMOME Julien CS-SI" <julien.lamome-cs-si@irsn.fr>
To: <gcc-help@gcc.gnu.org>
Subject: Automatic Parallelization fail
Date: Thu, 08 Dec 2011 14:47:00 -0000 [thread overview]
Message-ID: <72041471EE7D1540B7ECD771EA430DB7040E3C37@AMESS102.proton.intra.irsn.fr> (raw)
Hi !
I try to use the automatic parellilazion with the last (4.6.2) gcc version. I use this « tuto » http://openwall.info/wiki/internal/gcc-local-build for building gcc and tools.
I compile with :
my-gcc loop.c -o loop -fopenmp -floop-parallelize-all -ftree-parallelize-loops=8 -fdump-tree-parloops-details -lpthread
When I launch my "loop", I have only one processor used.
If I add a "#pragma " directive (for use explicitely OpenMP), I have some processors used.
In test-c-117t.parloops, loop 5 and 7are not noted "loop is not parallel according to graphite", so I think they could be parallelized ?
Thank for your help
reply other threads:[~2011-12-08 14:47 UTC|newest]
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