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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-07-01 09:44:48 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-07-01 11:51:49 +0200 |
| commit | 8d5b03802e99e581c360e9a2cf67856596ec824c (patch) | |
| tree | 9344762a8c137754c6413044d9520771069da2ce | |
| parent | score: Next try to fix thread lock on SMP (diff) | |
| download | rtems-8d5b03802e99e581c360e9a2cf67856596ec824c.tar.bz2 | |
score: Workaround for #2751
The ARM and PowerPC interrupt epilogues call _Thread_Dispatch() with
interrupts disabled (counter example: SPARC).
On SMP configurations, since inter-processor interrupts set the thread
dispatch necessary indicator this prevents a thread dispatch
notification in post-switch handlers (which all run with interrupts
disabled).
On all configurations, this is a serious issue for the interrupt
latency.
Update #2751
| -rw-r--r-- | cpukit/score/src/threadrestart.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/cpukit/score/src/threadrestart.c b/cpukit/score/src/threadrestart.c index 21e260b10b..32ecfba65d 100644 --- a/cpukit/score/src/threadrestart.c +++ b/cpukit/score/src/threadrestart.c @@ -357,6 +357,10 @@ void _Thread_Life_action_handler( _Thread_Make_zombie( executing ); + /* FIXME: Workaround for https://devel.rtems.org/ticket/2751 */ + cpu_self->dispatch_necessary = true; + + _Assert( cpu_self->heir != executing ); _Thread_Dispatch_enable( cpu_self ); RTEMS_UNREACHABLE(); } |