[Bug libgomp/43706] scheduling two threads on one core leads to starvation

[jakub at gcc dot gnu dot org]

------- Comment #10 from jakub at gcc dot gnu dot org  2010-04-21 14:01 -------
Subject: Bug 43706

Author: jakub
Date: Wed Apr 21 14:00:10 2010
New Revision: 158601

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158601
Log:
        PR libgomp/43706
        * config/linux/affinity.c (gomp_init_affinity): Decrease
        gomp_available_cpus if affinity mask confines the process to fewer
        CPUs.
        * config/linux/proc.c (get_num_procs): If gomp_cpu_affinity is
        non-NULL, just return gomp_available_cpus.

Modified:
    branches/gcc-4_4-branch/libgomp/ChangeLog
    branches/gcc-4_4-branch/libgomp/config/linux/affinity.c
    branches/gcc-4_4-branch/libgomp/config/linux/proc.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43706