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* score: PR2179: Fix initially locked PCP mutexesSebastian Huber2014-05-232-0/+37
| | | | | Elevate the priority of the creating task to the ceiling priority in case a semaphore is created as initially locked.
* testsuite: Add a user keypress to start pppd.Chris Johns2014-05-221-0/+22
| | | | Allow the test to run and pass when automatic testing.
* rtems: Fix sp2038 test.Chris Johns2014-05-221-0/+37
| | | | | | | | Avoid using newlib's gmtime_r call which fails with a max signed int. Add an RTEMS specific version for 1/1/1988 to 31/12/2100. Update sp2038 to test every day from 1/1/1988 to 31/12/2100. Only days need be tested as the code splits the seconds based on days.
* score: _Thread_Set_life_protection()Sebastian Huber2014-05-212-17/+80
| | | | | | | Enable usage of _Thread_Set_life_protection() in thread dispatch critical sections. This can be used to enable the thread life-protection with thread dispatching disabled and then enable thread dispatching.
* score: Split SMP scheduler enqueue functionSebastian Huber2014-05-156-0/+178
| | | | | | | | Extract code from _Scheduler_SMP_Enqueue_ordered() and move it to the new function _Scheduler_SMP_Enqueue_scheduled_ordered() to avoid untestable execution paths. Add and use function _Scheduler_SMP_Unblock().
* score: Simplify _Thread_Change_priority()Sebastian Huber2014-05-156-175/+0
| | | | | | | | | | | | | | | | | | | | | | | | The function to change a thread priority was too complex. Simplify it with a new scheduler operation. This increases the average case performance due to the simplified logic. The interrupt disabled critical section is a bit prolonged since now the extract, update and enqueue steps are executed atomically. This should however not impact the worst-case interrupt latency since at least for the Deterministic Priority Scheduler this sequence can be carried out with a wee bit of instructions and no loops. Add _Scheduler_Change_priority() to replace the sequence of - _Thread_Set_transient(), - _Scheduler_Extract(), - _Scheduler_Enqueue(), and - _Scheduler_Enqueue_first(). Delete STATES_TRANSIENT, _States_Is_transient() and _Thread_Set_transient() since this state is now superfluous. With this change it is possible to get rid of the SCHEDULER_SMP_NODE_IN_THE_AIR state. This considerably simplifies the implementation of the new SMP locking protocols.
* score: Introduce scheduler nodesSebastian Huber2014-05-141-1/+1
| | | | | | | | | | | | Rename scheduler per-thread information into scheduler nodes using Scheduler_Node as the base type. Use inheritance for specialized schedulers. Move the scheduler specific states from the thread control block into the scheduler node structure. Validate the SMP scheduler node state transitions in case RTEMS_DEBUG is defined.
* bsps: Use bsp_start_on_secondary_processor()Sebastian Huber2014-05-121-12/+3
| | | | Use a standard function for startup on secondary processors.
* score: Fix CPU context usage on SMPSebastian Huber2014-05-081-0/+27
| | | | | | | | | | We must not alter the is executing indicator in _CPU_Context_Initialize() since this would cause an invalid state during a self restart. The is executing indicator must be valid at creation time since otherwise _Thread_Kill_zombies() uses an undefined value for not started threads. This could result in a system life lock.
* smptests/smp07: Fix test outputSebastian Huber2014-05-071-3/+2
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* smptests/smp05: Fix test name and outputSebastian Huber2014-05-071-4/+3
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* tests: Add locked_printf_plugin()Sebastian Huber2014-05-072-18/+49
| | | | Add locked_vprintf(). Return an int just like printf(), etc.
* score: Implement forced thread migrationSebastian Huber2014-05-0710-15/+306
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of task migration in RTEMS has some implications with respect to the interrupt latency. It is crucial to preserve the system invariant that a task can execute on at most one processor in the system at a time. This is accomplished with a boolean indicator in the task context. The processor architecture specific low-level task context switch code will mark that a task context is no longer executing and waits that the heir context stopped execution before it restores the heir context and resumes execution of the heir task. So there is one point in time in which a processor is without a task. This is essential to avoid cyclic dependencies in case multiple tasks migrate at once. Otherwise some supervising entity is necessary to prevent life-locks. Such a global supervisor would lead to scalability problems so this approach is not used. Currently the thread dispatch is performed with interrupts disabled. So in case the heir task is currently executing on another processor then this prolongs the time of disabled interrupts since one processor has to wait for another processor to make progress. It is difficult to avoid this issue with the interrupt latency since interrupts normally store the context of the interrupted task on its stack. In case a task is marked as not executing we must not use its task stack to store such an interrupt context. We cannot use the heir stack before it stopped execution on another processor. So if we enable interrupts during this transition we have to provide an alternative task independent stack for this time frame. This issue needs further investigation.
* testsuites: Remove BSP_SMALL_MEMORYJoel Sherrill2014-05-0616-153/+18
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* score: Add SMP test message handlerSebastian Huber2014-05-056-0/+245
| | | | | This handler can be used to test the inter-processor interrupt implementation.
* score: SMP_FATAL_SCHEDULER_WITHOUT_PROCESSORSSebastian Huber2014-05-057-122/+51
| | | | | Avoid the SMP_FATAL_SCHEDULER_WITHOUT_PROCESSORS fatal error and make it a run-time error in rtems_scheduler_ident() and _Scheduler_Get_by_id().
* testsuite: Add a per BSP test check for tests not to build.Chris Johns2014-05-058-110/+145
| | | | | | | | Provide a file per BSP to list tests that do not build for a BSP. This change removes the BSP_SMALL_MEMORY hack from the code. That hack was a mistake. Provide configuration files for each BSP with tests that cannot build.
* score: Statically initialize _ISR_Vector_tableSebastian Huber2014-04-292-5/+1
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* utf8proc01: Honor BSP_SMALL_MEMORYJoel Sherrill2014-04-221-1/+7
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* flashdisk01: Honor BSP_SMALL_MEMORYJoel Sherrill2014-04-221-2/+2
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* fsdosfsname01: Honor BSP_SMALL_MEMORYJoel Sherrill2014-04-221-9/+23
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* fsdosfsformat01: Honor BSP_SMALL_MEMORYJoel Sherrill2014-04-221-4/+10
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* smptests/smpload01: Reduce timeout valueSebastian Huber2014-04-161-7/+3
| | | | Use events instead of suspend/resume.
* score: Add clustered/partitioned schedulingSebastian Huber2014-04-1527-9/+902
| | | | | | | | | | | | | | | Clustered/partitioned scheduling helps to control the worst-case latencies in the system. The goal is to reduce the amount of shared state in the system and thus prevention of lock contention. Modern multi-processor systems tend to have several layers of data and instruction caches. With clustered/partitioned scheduling it is possible to honour the cache topology of a system and thus avoid expensive cache synchronization traffic. We have clustered scheduling in case the set of processors of a system is partitioned into non-empty pairwise-disjoint subsets. These subsets are called clusters. Clusters with a cardinality of one are partitions. Each cluster is owned by exactly one scheduler instance.
* rtems: Add task get/set schedulerSebastian Huber2014-04-151-1/+77
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* rtems: Add scheduler get processorsSebastian Huber2014-04-151-0/+53
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* rtems: Add scheduler identificationSebastian Huber2014-04-151-1/+29
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* score: Task get/set affinitySebastian Huber2014-04-156-1/+167
| | | | | Make rtems_task_get_affinity() and rtems_task_set_affinity() available on non-SMP configurations. Allow larger CPU sets.
* score: Static scheduler configurationSebastian Huber2014-04-155-34/+39
| | | | | | Do not allocate the scheduler control structures from the workspace. This is a preparation step for configuration of clustered/partitioned schedulers on SMP.
* sp74.doc: Correct minor typosJoel Sherrill2014-04-141-3/+5
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* rtems: Rename rtems_smp_get_current_processor()Sebastian Huber2014-04-1117-29/+29
| | | | | | | Rename rtems_smp_get_current_processor() in rtems_get_current_processor(). Make rtems_get_current_processor() a function in uni-processor configurations to enable ABI compatibility with SMP configurations.
* rtems: Rename rtems_smp_get_processor_count()Sebastian Huber2014-04-1123-34/+34
| | | | | | Rename rtems_smp_get_processor_count() in rtems_get_processor_count(). Make rtems_get_processor_count() a function in uni-processor configurations to enable ABI compatibility with SMP configurations.
* score: Statically initialize IO managerSebastian Huber2014-04-103-6/+1
| | | | | | | | | | | | This simplifies the RTEMS initialization and helps to avoid a memory overhead. The workspace demands of the IO manager were not included in the <rtems/confdefs.h> workspace size estimate. This is also fixed as a side-effect. Update documentation and move "Specifying Application Defined Device Driver Table" to the section end. This sub-section is not that important for the user. Mentioning this at the beginning may lead to confusion.
* sptests/sp37: Account for internal struct alignSebastian Huber2014-04-091-2/+10
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* smptests/smpschedule01: Rename in smpscheduler01Sebastian Huber2014-04-097-23/+23
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* sptests/sp68: Fix configurationSebastian Huber2014-04-071-0/+2
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* psxtests/psxkey02: Test for proper error caseSebastian Huber2014-04-072-37/+14
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* tmtests/tm21: Fix configurationSebastian Huber2014-04-072-2/+4
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* sptests/spwatchdog: Fix for short enumsSebastian Huber2014-04-071-4/+11
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* score: Delete _Thread_Ticks_per_timesliceSebastian Huber2014-04-071-1/+0
| | | | Use the Configuration instead.
* score: Delete _Thread_Maximum_extensionsSebastian Huber2014-04-071-1/+0
| | | | Use the Configuration instead.
* Disable per task variables when SMP is enabledJoel Sherrill2014-04-044-12/+22
| | | | | | Per task variables are inherently unsafe in SMP systems. This patch disables them from the build and adds warnings in the appropriate documentation and configuration sections.
* rhealstone/rhmlatency: Fix configurationSebastian Huber2014-04-041-0/+2
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* score: Add scheduler control to scheduler opsSebastian Huber2014-04-042-6/+12
| | | | | Scheduler operations must be free of a global scheduler context to enable partitioned/clustered scheduling.
* smpaffinity01: Use Priority Affinity SMP scheduler.Jennifer Averett2014-04-031-1/+2
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* smppsxaffinity01: Use Priority Affinity SMP scheduler.Jennifer Averett2014-04-031-0/+1
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* smppsxaffinity02: Use Priority Affinity SMP scheduler.Jennifer Averett2014-04-031-0/+1
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* samples/fileio: Fix configurationSebastian Huber2014-04-031-1/+1
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* score: Move priority bit map to scheduler instanceSebastian Huber2014-04-033-28/+21
| | | | | | Delete global variables _Priority_Major_bit_map and _Priority_Bit_map. This makes it possible to use multiple priority scheduler instances for example with clustered/partitioned scheduling on SMP.
* score: PR788: Add INTERNAL_ERROR_RESOURCE_IN_USESebastian Huber2014-04-0311-16/+89
| | | | | | | | | | | | | | | Issue a fatal error in case a thread is deleted which still owns resources (e.g. a binary semaphore with priority inheritance or ceiling protocol). The resource count must be checked quite late since RTEMS task variable destructors, POSIX key destructors, POSIX cleanup handler, the Newlib thread termination extension or other thread termination extensions may release resources. In this context it would be quite difficult to return an error status to the caller. An alternative would be to place threads with a non-zero resource count not on the zombie chain. Thus we have a resource leak instead of a fatal error. The terminator thread can see this error if we return an RTEMS_RESOURCE_IN_USE status for the rtems_task_delete() for example.
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