| Commit message (Collapse) | Author | Age | Files | Lines |
... | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Use a per-CPU thread dispatch disable level. So instead of one global
thread dispatch disable level we have now one instance per processor.
This is a major performance improvement for SMP. On non-SMP
configurations this may simplifiy the interrupt entry/exit code.
The giant lock is still present, but it is now decoupled from the thread
dispatching in _Thread_Dispatch(), _Thread_Handler(),
_Thread_Restart_self() and the interrupt entry/exit. Access to the
giant lock is now available via _Giant_Acquire() and _Giant_Release().
The giant lock is still implicitly acquired via
_Thread_Dispatch_decrement_disable_level().
The giant lock is only acquired for high-level operations in interrupt
handlers (e.g. release of a semaphore, sending of an event).
As a side-effect this change fixes the lost thread dispatch necessary
indication bug in _Thread_Dispatch().
A per-CPU thread dispatch disable level greatly simplifies the SMP
support for the interrupt entry/exit code since no spin locks have to be
acquired in this area. It is only necessary to get the current
processor index and use this to calculate the address of the own per-CPU
control. This reduces the interrupt latency considerably.
All elements for the interrupt entry/exit code are now part of the
Per_CPU_Control structure: thread dispatch disable level, ISR nest level
and thread dispatch necessary. Nothing else is required (except CPU
port specific stuff like on SPARC).
|
| |
|
|
|
|
| |
Fix _times().
|
|
|
|
|
| |
Use an event triggered unicast to inform remote processors about a
necessary thread dispatch instead.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
If we enter _Thread_Dispatch() then _Thread_Dispatch_disable_level must
be zero. Single processor RTEMS assumes that stores of non-zero values
to _Thread_Dispatch_disable_level are observed by interrupts as non-zero values.
Move the _Thread_Dispatch_set_disable_level( 1 ) out of the first ISR
disabled critical section. In case interrupts happen between the
_Thread_Dispatch_set_disable_level( 1 ) and _ISR_Disable( level ) then
the interrupt will observe a non-zero _Thread_Dispatch_disable_level and
will not issue a _Thread_Dispatch() and we can enter the ISR disabled
section directly after interrupt processing.
This change leads to symmetry between the single processor and SMP
configuration.
|
|
|
|
|
|
|
|
| |
Move implementation specific parts of thread.h and thread.inl into new
header file threadimpl.h. The thread.h contains now only the
application visible API.
Remove superfluous header file includes from various files.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Delete _Thread_libc_reent and add __getreent() instead according to
__DYNAMIC_REENT__ define.
For SMP configurations __DYNAMIC_REENT__ must be defined.
A Newlib including the following patch is required:
2013-07-09 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libc/include/sys/config.h (__DYNAMIC_REENT__): Define for RTEMS.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
The new Simple SMP Scheduler allocates a processor for the processor
count highest priority ready threads. The thread priority and position
in the ready chain are the only information to determine the scheduling
decision. Threads with an allocated processor are in the scheduled
chain. After initialization the scheduled chain has exactly processor
count nodes. Each processor has exactly one allocated thread after
initialization. All enqueue and extract operations may exchange threads
with the scheduled chain. One thread will be added and another will be
removed. The scheduled and ready chain is ordered according to the
thread priority order. The chain insert operations are O(count of ready
threads), thus this scheduler is unsuitable for most real-time
applications.
The thread preempt mode will be ignored.
|
|
|
|
|
|
|
| |
Move thread dispatch declarations and inline functions to new header
<rtems/score/threaddispatch.h> to make it independent of the
Thread_Control structure. This avoids a cyclic dependency in case
thread dispatch functions are used for the object implementation.
|
|
|
|
|
|
|
|
| |
Move post switch hook from API_extensions_Control to new
API_extensions_Post_switch_control. Rename
_API_extensions_Run_postswitch() in _API_extensions_Run_post_switch().
Add _API_extensions_Post_switch_list and
_API_extensions_Add_post_switch().
|
|
|
|
|
|
|
| |
This patch is a task from GCI 2012 which improves the Doxygen
comments in the RTEMS source.
http://www.google-melange.com/gci/task/view/google/gci2012/7985215
|
|
|
|
|
| |
The _API_extensions_Run_postswitch() function is only used in
_Thread_Dispatch(). Avoid superfluous load of _Thread_Executing.
|
|
|
|
|
| |
This file contains the parts of <rtems/score/userext.h> that are only
necessary for the RTEMS implementation.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
The changes in _Thread_Dispatch() of commits
dad36c52b8be5d7b46bc7af85655055db7208652 and
d4dc7c8196355f08044e67a3f5c1e19485f17ff1 introduced a severe bug which
destroys the real-time properties of RTEMS completely.
Consider the following scenario. We have three tasks L (lowest
priority), M (middle priority), and H (highest priority). Now let a
thread dispatch from M to L happen. An interrupt occurs in
_Thread_Dispatch() here:
void _Thread_Dispatch( void )
{
[...]
post_switch:
_ISR_Enable( level );
<-- INTERRUPT
<-- AFTER INTERRUPT
_Thread_Unnest_dispatch();
_API_extensions_Run_postswitch();
}
The interrupt event makes task H ready. The interrupt code will see
_Thread_Dispatch_disable_level > 0 and thus doesn't perform a
_Thread_Dispatch(). Now we return to position "AFTER INTERRUPT". This
means task L executes now although task H is ready! Task H will execute
once someone calls _Thread_Dispatch().
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| |
Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
|
|
|
|
|
|
|
|
| |
PR 1876
* score/Makefile.am, score/include/rtems/score/isr.h, score/src/isr.c,
score/src/smp.c, score/src/smplock.c, score/src/threaddispatch.c,
score/src/threaddispatchdisablelevel.c: Add smp isr support.
* score/src/isrsmp.c: New file.
|
|
|
|
|
|
|
|
| |
PR 1796/cpukit
* sapi/src/exshutdown.c, score/include/rtems/score/percpu.h,
score/include/rtems/score/smp.h, score/src/smp.c,
score/src/threaddispatch.c, score/src/threadhandler.c: Added SMP
interprocess communications.
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
PR 1777/cpukit
* libcsupport/src/malloc_deferred.c, libcsupport/src/realloc.c,
score/Makefile.am, score/cpu/lm32/irq.c, score/cpu/nios2/irq.c,
score/include/rtems/score/coremutex.h,
score/include/rtems/score/thread.h,
score/inline/rtems/score/thread.inl, score/src/heapfree.c,
score/src/pheapwalk.c, score/src/smp.c, score/src/threaddispatch.c:
Consolidated access to _Thread_Dispatch_disable_level.
* score/src/threaddisabledispatch.c, score/src/threadenabledispatch.c:
New files.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* include/rtems/bspIo.h, include/rtems/concat.h, include/rtems/irq.h,
score/cpu/i386/rtems/score/idtr.h,
score/cpu/powerpc/rtems/powerpc/registers.h,
score/src/objectidtoname.c, score/src/schedulerpriorityblock.c,
score/src/schedulerpriorityschedule.c,
score/src/schedulerpriorityunblock.c,
score/src/schedulerpriorityyield.c, score/src/thread.c,
score/src/threadchangepriority.c, score/src/threadclearstate.c,
score/src/threadclose.c, score/src/threadcreateidle.c,
score/src/threaddelayended.c, score/src/threaddispatch.c,
score/src/threadget.c, score/src/threadhandler.c,
score/src/threadinitialize.c, score/src/threadloadenv.c,
score/src/threadready.c, score/src/threadreset.c,
score/src/threadrestart.c, score/src/threadresume.c,
score/src/threadsetpriority.c, score/src/threadsetstate.c,
score/src/threadsettransient.c, score/src/threadstackallocate.c,
score/src/threadstackfree.c, score/src/threadstart.c,
score/src/threadstartmultitasking.c, score/src/threadsuspend.c,
score/src/threadtickletimeslice.c, score/src/threadyieldprocessor.c:
Fix typo where license said found in found in.
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
PR 1599/cpukit
* posix/src/psignalunblockthread.c, posix/src/pthreadkill.c,
rtems/src/signalsend.c, score/include/rtems/score/percpu.h,
score/inline/rtems/score/thread.inl, score/src/thread.c,
score/src/threadchangepriority.c, score/src/threadclearstate.c,
score/src/threaddispatch.c, score/src/threadready.c,
score/src/threadresume.c, score/src/threadsetstate.c,
score/src/threadstartmultitasking.c, score/src/threadsuspend.c,
score/src/threadyieldprocessor.c: Rename _Context_Switch_necessary to
_Thread_Dispatch_necessary to more properly reflect the intent.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
PR 1573/cpukit
* configure.ac, posix/src/killinfo.c,
posix/src/psignalclearprocesssignals.c,
posix/src/psignalsetprocesssignals.c,
posix/src/psignalunblockthread.c, posix/src/pthreadcreate.c,
posix/src/pthreadkill.c, posix/src/pthreadsigmask.c,
rtems/src/signalsend.c, rtems/src/taskmode.c, score/Makefile.am,
score/preinstall.am, score/include/rtems/system.h,
score/include/rtems/score/context.h, score/include/rtems/score/isr.h,
score/include/rtems/score/thread.h, score/src/isr.c,
score/src/isrthreaddispatch.c, score/src/thread.c,
score/src/threaddispatch.c, score/src/threadloadenv.c: Add a per cpu
data structure which contains the information required by RTEMS for
each CPU core. This encapsulates information such as thread
executing, heir, idle and dispatch needed.
* score/include/rtems/score/percpu.h, score/src/percpu.c: New files.
|
|
|
|
|
|
|
|
|
| |
* libcsupport/src/__times.c, libmisc/cpuuse/cpuusagedata.c,
libmisc/cpuuse/cpuusagereport.c, libmisc/cpuuse/cpuusagereset.c,
rtems/include/rtems/rtems/types.h, rtems/src/ratemongetstatistics.c,
rtems/src/ratemonreportstatistics.c, score/src/threaddispatch.c,
score/src/threadinitialize.c, score/src/threadtickletimeslice.c:
Updated copyright line.
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* configure.ac, libcsupport/src/__times.c,
libmisc/cpuuse/cpuusagedata.c, libmisc/cpuuse/cpuusagereport.c,
libmisc/cpuuse/cpuusagereset.c, rtems/include/rtems/rtems/ratemon.h,
rtems/include/rtems/rtems/types.h, rtems/src/ratemongetstatistics.c,
rtems/src/ratemongetstatus.c, rtems/src/ratemonperiod.c,
rtems/src/ratemonreportstatistics.c,
score/include/rtems/score/thread.h, score/src/threaddispatch.c,
score/src/threadinitialize.c, score/src/threadtickletimeslice.c:
Changed the configuration of statistics granularity to use just one
define.
|
|
|
|
|
|
| |
* score/inline/rtems/score/thread.inl, score/src/threaddispatch.c:
Correct conditionals so _Thread_Enable_dispatch() is always inlined
when intended.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* libcsupport/src/__times.c, libmisc/cpuuse/cpuusagereport.c,
libmisc/cpuuse/cpuusagereset.c, posix/src/clockgettime.c,
posix/src/pthread.c, posix/src/timersettime.c,
rtems/include/rtems/rtems/ratemon.h,
rtems/src/clockgetsecondssinceepoch.c, rtems/src/clockgetuptime.c,
rtems/src/ratemongetstatus.c, rtems/src/ratemonperiod.c,
rtems/src/ratemonreportstatistics.c, rtems/src/taskwakewhen.c,
rtems/src/timerfirewhen.c, rtems/src/timerserver.c,
rtems/src/timerserverfirewhen.c, score/Makefile.am,
score/preinstall.am, score/include/rtems/score/thread.h,
score/include/rtems/score/tod.h, score/src/coretod.c,
score/src/coretodget.c, score/src/coretodgetuptime.c,
score/src/coretodset.c, score/src/coretodtickle.c,
score/src/threaddispatch.c, score/src/threadinitialize.c: Add
SuperCore handler Timestamp to provide an opaque class for the
representation and manipulation of uptime, time of day, and the
difference between two timestamps. By using SuperCore Timestamp, it
is clear which methods and APIs really have to be struct timespec and
which can be in an optimized native format.
* score/include/rtems/score/timestamp.h,
score/src/coretodgetuptimetimespec.c: New files.
|
| |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* libcsupport/src/__times.c, libmisc/cpuuse/cpuusagereport.c,
libmisc/cpuuse/cpuusagereset.c, libmisc/monitor/mon-task.c,
rtems/include/rtems/rtems/ratemon.h, rtems/src/ratemongetstatus.c,
rtems/src/ratemonperiod.c, score/include/rtems/score/thread.h,
score/src/threaddispatch.c, score/src/threadinitialize.c,
score/src/threadtickletimeslice.c: Add typedefs for cpu usage and
period timing statistics. Also renamed related variables and
structure members so they are the same whether you are using
nanosecond (e.g. struct timespec) or ticks (e.g. uint32_t)
granularity. This lays the groundwork for future cleanup.
|
|
|
|
|
|
|
|
| |
* configure.ac, score/inline/rtems/score/thread.inl,
score/src/threaddispatch.c: Add ability for user to disable inlining
of _Thread_Enable_dispatch. This can save code space but more
importantly it means the binary generated does not have code inlined
that is difficult to test and very seldom executed.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* ChangeLog, configure.ac, libcsupport/src/__times.c,
libmisc/cpuuse/cpuuse.c, libmisc/stackchk/check.c,
rtems/include/rtems/rtems/ratemon.h, rtems/src/ratemongetstatus.c,
rtems/src/ratemonperiod.c, rtems/src/ratemonreportstatistics.c,
rtems/src/ratemonresetall.c, rtems/src/ratemontimeout.c,
score/Makefile.am, score/include/rtems/score/thread.h,
score/include/rtems/score/timespec.h, score/src/threaddispatch.c,
score/src/threadinitialize.c, score/src/threadtickletimeslice.c,
score/src/timespecdivide.c: Add nanoseconds granularity to the rate
monotonic period statistics and CPU usage statistics. This capability
is enabled by default although may be conditionally disabled by the
user. It could be too much overhead on small targets but it does not
appear to be bad in early testing. Its impact on code size has not
been evaluated either. It is possible that both forms of statistics
gathering could be disabled with further tweaking of the conditional
compilation.
* score/src/timespecdividebyinteger.c: New file.
|
|
|
|
|
|
|
| |
* itron/src/itrontime.c: Fix typo.
* score/include/rtems/score/tod.h: Add TOD_TICKS_PER_SECOND macro.
* score/src/iterateoverthreads.c: Safely take NULL as argument.
* score/src/threaddispatch.c: Formatting.
|
| |
|
|
|
|
|
|
| |
PR 609/rtems
* score/src/threaddispatch.c: Close race condition between
_Thread_Dispatch and _Thread_Tickle_timeslice.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* include/rtems/debug.h, include/rtems/seterr.h,
include/rtems/system.h, include/rtems/score/address.h,
include/rtems/score/apiext.h, include/rtems/score/apimutex.h,
include/rtems/score/bitfield.h, include/rtems/score/chain.h,
include/rtems/score/context.h, include/rtems/score/copyrt.h,
include/rtems/score/coremsg.h, include/rtems/score/coremutex.h,
include/rtems/score/coresem.h, include/rtems/score/heap.h,
include/rtems/score/interr.h, include/rtems/score/isr.h,
include/rtems/score/mpci.h, include/rtems/score/mppkt.h,
include/rtems/score/object.h, include/rtems/score/objectmp.h,
include/rtems/score/priority.h, include/rtems/score/stack.h,
include/rtems/score/states.h, include/rtems/score/sysstate.h,
include/rtems/score/thread.h, include/rtems/score/threadmp.h,
include/rtems/score/threadq.h, include/rtems/score/tod.h,
include/rtems/score/tqdata.h, include/rtems/score/userext.h,
include/rtems/score/watchdog.h, include/rtems/score/wkspace.h,
inline/rtems/score/address.inl, inline/rtems/score/chain.inl,
inline/rtems/score/coremsg.inl, inline/rtems/score/coremutex.inl,
inline/rtems/score/coresem.inl, inline/rtems/score/heap.inl,
inline/rtems/score/isr.inl, inline/rtems/score/mppkt.inl,
inline/rtems/score/object.inl, inline/rtems/score/objectmp.inl,
inline/rtems/score/priority.inl, inline/rtems/score/stack.inl,
inline/rtems/score/states.inl, inline/rtems/score/sysstate.inl,
inline/rtems/score/thread.inl, inline/rtems/score/threadmp.inl,
inline/rtems/score/tod.inl, inline/rtems/score/tqdata.inl,
inline/rtems/score/userext.inl, inline/rtems/score/watchdog.inl,
inline/rtems/score/wkspace.inl, macros/rtems/score/address.inl,
macros/rtems/score/chain.inl, macros/rtems/score/coremsg.inl,
macros/rtems/score/coremutex.inl, macros/rtems/score/coresem.inl,
macros/rtems/score/heap.inl, macros/rtems/score/isr.inl,
macros/rtems/score/mppkt.inl, macros/rtems/score/object.inl,
macros/rtems/score/objectmp.inl, macros/rtems/score/priority.inl,
macros/rtems/score/stack.inl, macros/rtems/score/states.inl,
macros/rtems/score/sysstate.inl, macros/rtems/score/thread.inl,
macros/rtems/score/threadmp.inl, macros/rtems/score/tod.inl,
macros/rtems/score/tqdata.inl, macros/rtems/score/userext.inl,
macros/rtems/score/watchdog.inl, macros/rtems/score/wkspace.inl,
src/apiext.c, src/chain.c, src/coremsg.c, src/coremsgbroadcast.c,
src/coremsgclose.c, src/coremsgflush.c, src/coremsgflushsupp.c,
src/coremsgflushwait.c, src/coremsginsert.c, src/coremsgseize.c,
src/coremsgsubmit.c, src/coremutex.c, src/coremutexflush.c,
src/coremutexseize.c, src/coremutexsurrender.c, src/coresem.c,
src/coresemflush.c, src/coresemseize.c, src/coresemsurrender.c,
src/coretod.c, src/coretodset.c, src/coretodtickle.c,
src/coretodtoseconds.c, src/coretodvalidate.c, src/heap.c,
src/heapallocate.c, src/heapextend.c, src/heapfree.c,
src/heapgetinfo.c, src/heapsizeofuserarea.c, src/heapwalk.c,
src/interr.c, src/isr.c, src/iterateoverthreads.c, src/mpci.c,
src/object.c, src/objectallocate.c, src/objectallocatebyindex.c,
src/objectclearname.c, src/objectcomparenameraw.c,
src/objectcomparenamestring.c, src/objectcopynameraw.c,
src/objectcopynamestring.c, src/objectextendinformation.c,
src/objectfree.c, src/objectget.c, src/objectgetbyindex.c,
src/objectgetisr.c, src/objectgetnext.c, src/objectgetnoprotection.c,
src/objectidtoname.c, src/objectinitializeinformation.c,
src/objectmp.c, src/objectnametoid.c, src/objectshrinkinformation.c,
src/thread.c, src/threadchangepriority.c, src/threadclearstate.c,
src/threadclose.c, src/threadcreateidle.c, src/threaddelayended.c,
src/threaddispatch.c, src/threadevaluatemode.c, src/threadget.c,
src/threadhandler.c, src/threadidlebody.c, src/threadinitialize.c,
src/threadloadenv.c, src/threadmp.c, src/threadq.c,
src/threadqdequeue.c, src/threadqdequeuefifo.c,
src/threadqdequeuepriority.c, src/threadqenqueue.c,
src/threadqenqueuefifo.c, src/threadqenqueuepriority.c,
src/threadqextract.c, src/threadqextractfifo.c,
src/threadqextractpriority.c, src/threadqextractwithproxy.c,
src/threadqfirst.c, src/threadqfirstfifo.c,
src/threadqfirstpriority.c, src/threadqflush.c, src/threadqtimeout.c,
src/threadready.c, src/threadreset.c, src/threadresettimeslice.c,
src/threadrestart.c, src/threadresume.c, src/threadrotatequeue.c,
src/threadsetpriority.c, src/threadsetstate.c,
src/threadsettransient.c, src/threadstackallocate.c,
src/threadstackfree.c, src/threadstart.c,
src/threadstartmultitasking.c, src/threadsuspend.c,
src/threadtickletimeslice.c, src/threadyieldprocessor.c,
src/userext.c, src/watchdog.c, src/watchdogadjust.c,
src/watchdoginsert.c, src/watchdogremove.c, src/watchdogtickle.c,
src/wkspace.c: URL for license changed.
|
|
|
|
|
|
|
|
|
| |
* include/rtems/score/thread.h, inline/rtems/score/thread.inl,
src/threaddispatch.c, src/threadinitialize.c:
Move the C library re-enterrant support directly into
the thread dispatch code. RTEMS needs libc and so requiring
libc to use a user extension with its overhead is not the best
solution. This patch lowers the overhead to 2 pointer moves.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
* src/threaddispatch.c, src/threadhandler.c: Per PR211 fix
saving/restoring floating point context. The fpsave and fprestore
routines are only used in a executing context which _is_ fp and hence
has the FPU enabled. The current behavior required the FPU always to
be on which is very dangerous if lazy context switching is used.
[Joel Note: Some ports explicitly enabled the FPU in the FP save and
restore routines to avoid this.]
The patch also makes sure (on powerpc only) that the FPU is disabled
for integer tasks. Note that this is crucial if deferred fp context
switching is used. Otherwise, fp context corruption may go undetected!
Also note that even tasks which merely push/pop FP registers to/from
the stack without modifying them still MUST be FP tasks - otherwise
(if lazy FP context switching is used), FP register corruption (of
other, FP, tasks may occur)!
Furthermore, (on PPC) by default, lazy FP context save/restore
is _disabled_.
|
|
|
|
|
|
|
|
|
|
|
| |
a BSP (c4xsim) supporting the simulator included with gdb. This port
was done by Joel Sherrill and Jennifer Averett of OAR Corporation.
Also included with this port is a space/time optimization to eliminate
FP context switch management on CPUs without hardware or software FP.
An issue with this port was that sizeof(unsigned32) = sizeof(unsigned8)
on this CPU. This required addressing alignment checks and assumptions
as well as fixing code that assumed sizeof(unsigned32) == 4.
|
| |
|
|
split into one function per file, this will decrease the size of executables.
|