Bug#637654: libglib2.0-dev: glib programs can'T be run with realtime priority (or any non-SCHED_OTHER regime)
smcv at debian.org
Mon Jan 16 15:22:49 UTC 2012
forwarded 637654 https://bugzilla.gnome.org/show_bug.cgi?id=667651
retitle 637654 libglib2.0-dev: g_thread_create() causes a fatal error under realtime scheduling
tags 637654 + patch
On Sat, 13 Aug 2011 at 15:27:42 +0200, Marc Lehmann wrote:
> GThread-ERROR **: file /tmp/buildd/glib2.0-2.28.6/./gthread/gthread-posix.c: line 348 (g_thread_create_posix_impl): error 'Invalid argument' during 'pthread_attr_setschedparam (&attr, &sched)'
The actual bug here is that g_thread_create() and g_thread_create_full()
attempt to change the thread's priority, and then implement it wrong: they
either crash (under realtime scheduling) or have no effect (otherwise).
This was independently found in Maemo, and I've forwarded it upstream
This bug no longer exists in GLib 2.31, where the concept of thread priorities
has been deprecated, and GLib never actually changes a thread's priority.
My proposed solution is for 2.30 to not change new threads' scheduling
policy or priority either, because on Unix that functionality has never
actually worked - policy and priority were always inherited. See the upstream
bug for details.
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