litmus-rt.git/kernel, branch gpusync/staging The LITMUS^RT kernel. Add nvidia tasklet and workqueue tracing 2013-11-08T18:13:55+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-11-08T18:11:02+00:00 ddf9f0dda3d8053ff678a88c86dfe1900f42f9b3 This patch adds calls to trace tasklet/workqueue releases, begin-execution, and end-execution events. 
This patch adds calls to trace tasklet/workqueue
releases, begin-execution, and end-execution events.
Update/cleanup lockdep to support nested locks 2013-11-07T23:19:15+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-11-07T23:19:15+00:00 1a0b5b4ac092a1874ffcf6e3a861af2a59ad7d4a This patch modifies lockdep to support nested locking protocols--specifically allow keys allocated in dynamic memory. We need to allow spinlocks to be acquired in a nested fashion without triggering complaints from lockdep. This is needed to support chained/transitive priority inheritance. 
This patch modifies lockdep to support nested locking
protocols--specifically allow keys allocated in dynamic
memory. We need to allow spinlocks to be acquired in a
nested fashion without triggering complaints from
lockdep. This is needed to support chained/transitive
priority inheritance.
Fix compilation bug when GPUs and klmirqd are used 2013-11-06T21:30:21+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-11-06T21:30:21+00:00 68e340beb1de0d241bb2be5769820c1965084dff A few definitions were missing or misplaced. This patch puts them in the right places. 
A few definitions were missing or misplaced. This patch
puts them in the right places.
Add more robust budget tracking/enforcement. 2013-11-05T18:56:04+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-11-05T18:56:04+00:00 e46baed9a9271679b2f5f05206882a69fec23251 This patch adds more feature-rich budget tracking/enforcement features. Budget tracking is now controlled by a state machine. Each task can elect to use a different budget policy. Hooks are in place to implement bandwidth inheritance (BWI) and virtually exclusive resources. 
This patch adds more feature-rich budget tracking/enforcement
features. Budget tracking is now controlled by a state machine.
Each task can elect to use a different budget policy. Hooks
are in place to implement bandwidth inheritance (BWI) and
virtually exclusive resources.
Add auxiliary task support. 2013-11-04T22:44:58+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-11-04T22:44:58+00:00 31575bc6283016c0e1c054923cfd69df9039c5d8 Auxiliary tasks helper threads to real-time tasks. These helper tasks may inherit the priority of the real-time task(s) in the process only if that real-time task is blocked/suspended (and it is not suspending because the job has completed). Otherwise, these threads are scheduled with a default priority greater than normal Linux threads, but lower than any other real-time task, including klmirqd threads. 
Auxiliary tasks helper threads to real-time tasks. These helper
tasks may inherit the priority of the real-time task(s) in the
process only if that real-time task is blocked/suspended (and it
is not suspending because the job has completed). Otherwise,
these threads are scheduled with a default priority greater than
normal Linux threads, but lower than any other real-time task, including
klmirqd threads.
Add klmirqd interrupt handling (w/ GPU support) 2013-10-31T20:59:13+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-10-31T20:59:13+00:00 b2e8772870c7821a3565de4e78c547b05fc71474 This patch adds klmirqd, which can be used to implement real-time threaded interrupt handling and workqueue handling. Patch includes added hooks into Linux's interrrupt/tasklet/workqueue implementations. This patch also includes interrupt handling and work queue handling for GPU tasklets and work_structs. 
This patch adds klmirqd, which can be used to implement
real-time threaded interrupt handling and workqueue
handling. Patch includes added hooks into Linux's
interrrupt/tasklet/workqueue implementations.

This patch also includes interrupt handling and work
queue handling for GPU tasklets and work_structs.
hrtimer: Ignore hrtimer requeue when not in CB. 2013-10-09T22:27:45+00:00 Glenn Elliott gelliott@cs.unc.edu 2013-10-09T22:27:45+00:00 a7171faece72e1f1d68d92512369143e12d9b04d This patch removes a BUG_ON in the hrtimer root callback. Allows the hook to be called when not actually in the callback state. A BUG_ON forbid this state when a timer needed to be rearmed. Instead, we just ignore the rearm gracefully. This feature is needed for budget enforcement under bandwidth-inheritance. 
This patch removes a BUG_ON in the hrtimer root
callback. Allows the hook to be called when
not actually in the callback state. A BUG_ON
forbid this state when a timer needed to be
rearmed. Instead, we just ignore the rearm
gracefully.

This feature is needed for budget enforcement
under bandwidth-inheritance.
Protect LITMUS^RT tasks from re-nicing 2013-08-07T07:47:03+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-07-25T21:00:29+00:00 6a44f71b60d2019d64a052ec5d4fb63742e6e8ec Assigning a nice value to LITMUS^RT tasks is meaningless. Bail out early. 
Assigning a nice value to LITMUS^RT tasks is meaningless. Bail out
early.
Don't call set_tsk_need_resched() on remote LITMUS^RT task 2013-08-07T07:47:03+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-07-25T20:56:55+00:00 277efe46abaf2c7b49b7b28417bc77ae40445be2 This patch fixes a BUG_ON() in litmus/preempt.c:33 reported by Felipe Cerqueira & Manohar Vanga. 
This patch fixes a BUG_ON() in litmus/preempt.c:33 reported by Felipe
Cerqueira & Manohar Vanga.
Hook into rt scheduling class to protect LITMUS^RT tasks 2013-08-07T07:47:02+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-07-01T21:56:31+00:00 1288313c31e75a5138e4c87901eda10a07ee80ca The rt scheduling class thinks it's the highest-priority scheduling class around. It is not in LITMUS^RT. Don't go preempting remote cores that run SCHED_LITMUS tasks. 
The rt scheduling class thinks it's the highest-priority scheduling
class around. It is not in LITMUS^RT. Don't go preempting remote cores
that run SCHED_LITMUS tasks.