Gregory Nutt
4f5879f998
C library: Add ffs(). Add strings.h. Move strcasecmp, strncasecmp, bzero, bcmp, and bcopy to where they belong in strings.h.h, not string.h. bzero, bcmp, and bcopy are legacy functions; the contemporary counterparts should be used instead.
2017-02-16 16:10:09 -06:00
Gregory Nutt
74189d84e2
Cancellation points: Fix some backward logic in conditional compilation.
2017-02-02 06:42:41 -06:00
Gregory Nutt
e0f199e42e
Missing semicolon in previous commit
2017-01-31 14:18:20 -06:00
Gregory Nutt
154873a3d0
Timer logic: Add private function prototypes to eliminate a warning; Functions should not be inline because the may recurse.
2017-01-31 13:45:22 -06:00
Gregory Nutt
e30b2617e3
Shared Libs: Implement module based shared libraries for the PROTECTED mode build
2017-01-29 13:03:53 -06:00
Gregory Nutt
2c45f482b1
Module names are not needed in libc/modlib when the module library is used only for shared library support.
2017-01-29 12:23:24 -06:00
Gregory Nutt
86bdd0a4c7
Modules: Move last of many C files from sched/module to libc/modlib
2017-01-29 11:54:54 -06:00
Gregory Nutt
6da66fb5c8
Modules: Move next five of many C files from sched/module to libc/modlib
2017-01-29 11:17:29 -06:00
Gregory Nutt
5e94dd22bb
Modules: Move first five of many C files from sched/module to libc/modlib
2017-01-29 10:05:15 -06:00
Gregory Nutt
00e46b5966
Move gnu-elf.ld from sched/module to libc/modlib. Update paths in Make.defs files to account for new location of file
2017-01-29 09:03:01 -06:00
Gregory Nutt
2717e781f0
libc/modlib: Add build a configuration logic for a shared module library.
2017-01-29 08:55:27 -06:00
Gregory Nutt
b79ca9dcdd
Modules: Move sched/module/module.h to include/nuttx/lib/modlib.h
2017-01-29 08:24:42 -06:00
Gregory Nutt
68a7110195
sched/modules: Add support for dependencies between modules.
2017-01-27 11:43:27 -06:00
Gregory Nutt
6a4880f415
SMP: Fix timer related issues: Round robin and sporadic scheduling were only being performed for tasks running on the CPU that processes the system timer interrupt. Similary, CPU load measurements were only be processed for running on the CPU that receives the sampling interrupt.
2017-01-23 12:14:01 -06:00
Gregory Nutt
4574a1ca42
Modules: Extend the module interface so that we can access symbols exported by the module.
2017-01-22 14:26:22 -06:00
Gregory Nutt
d90e66a024
Kernel Modules: Module initializer may now return a symbol table (not yet used for anything)
2017-01-22 11:37:49 -06:00
Gregory Nutt
1823c78663
Update some comments
2017-01-22 10:17:51 -06:00
Gregory Nutt
686041f8e7
CPU load: Correct computation of the nominal period to use when the source is a oneshot timer.
2017-01-22 07:12:22 -06:00
rg
1e38884088
Fix a compile error: in sched_cpuload.c:Line136, the variables ts and secs are not defined if CONFIG_CPULOAD_ONESHOT_ENTROPY = 0. However, these variables are used regardless of CONFIG_CPULOAD_ONESHOT_ENTROPY at lines~180:onwards.
2017-01-22 06:48:11 -06:00
Gregory Nutt
edd9186540
ELF: Move ARMv7-A and ARMv7-R versions of ELF relocation logic to libc/machine
2017-01-21 14:40:26 -06:00
Gregory Nutt
fba247b119
Update some comments
2017-01-13 16:32:09 -06:00
Gregory Nutt
99bb2dda5d
i.MX6: Corrects behavior of last SMP patch with i.MX6
2017-01-13 12:29:57 -06:00
Gregory Nutt
a51b5b7e17
Add REVISIT to comments.
2017-01-13 09:40:17 -06:00
Gregory Nutt
37e6e6a52e
Eliminate a warning
2017-01-13 06:56:13 -06:00
Gregory Nutt
9ce4022096
SMP: Fix an error in critical section logic when performing a context switch from an interrupt handler. The g_cpu_irqset bit was not being set for the CPU so other CPUs did not know about the critical section.
2017-01-13 06:48:10 -06:00
Masayuki Ishikawa
acbfa47f70
sched_note: Fix spinlock instrumentation
2017-01-12 08:04:28 -06:00
Gregory Nutt
d5b1ca14e2
Update README and some comments.
2017-01-02 13:54:07 -06:00
Gregory Nutt
04557a1198
Eliminate a warning
2016-12-31 14:47:32 -06:00
Gregory Nutt
8f716a386b
SMP: Use irq_cpu_locked() in sched_removereadytorun() and sched_setpriority()
2016-12-29 10:40:58 -06:00
Gregory Nutt
af92a67fc5
SMP: Use irq_cpu_locked() in sched_mergepending()
2016-12-29 08:53:31 -06:00
Gregory Nutt
e7d2b9f0e8
SMP: Move sharable function to common file as irq_cpu_locked(). Use irq_cpu_locked() in sched_unlock()
2016-12-29 08:17:10 -06:00
Gregory Nutt
96394f339e
SMP: Fix a gap where we may try to make modifications to the task lists without being in a critical sections. That permits concurrent access to the tasks lists and many subtle problems. This fix just remains in the critical section throughout the operation (and possible until the task is restore in the event of a context switch). Makes a big difference in stability
2016-12-28 13:58:24 -06:00
Gregory Nutt
88da65ad8a
sched_cpulocked: Avoid use of spinlock. That has been reported to cause a deadlock.
2016-12-28 12:10:17 -06:00
Gregory Nutt
72490f84e6
SMP: Make checks for CPU lock set more robust. There are certains conditions early in initialization on during interrupt handling where things need to be done a little differently.
2016-12-28 10:21:05 -06:00
Gregory Nutt
cfb876263a
SMP: There were certain conditions that we must avoid by preventing releasing the pending tasks while withn a critical section. But this logic was incomplete; there was no logic to prevent other CPUs from adding new, running tasks while on CPU is in a critical section.
...
This commit corrects this. This is matching logic in sched_addreadytorun to avoid starting new tasks within the critical section (unless the CPU is the holder of the lock). The holder of the IRQ lock must be permitted to do whatever it needs to do.
2016-12-27 08:49:07 -06:00
Gregory Nutt
e0f3f4ae19
Update some coments
2016-12-26 16:12:27 -06:00
Gregory Nutt
849a5dc2a9
SMP: Enforce this rule: Tasks which are normally restored when sched_unlock() is called must remain pending (1) if we are in a critical section, i.e., g_cpu_irqlock is locked , or (2) other CPUs still have pre-emption disabled, i.e., g_cpu_schedlock is locked. In those cases, the release of the pending tasks must be deferred until those conditions are met.
2016-12-26 08:15:02 -06:00
Gregory Nutt
d45a81d643
Revert "SMP: Fix a error introduced in 36b676eea6 and fully decouple disabling of pre-emption from critical sections."
...
This reverts commit 9aedf1bdec
2016-12-26 07:48:22 -06:00
Gregory Nutt
9aedf1bdec
SMP: Fix a error introduced in 36b676eea6 and fully decouple disabling of pre-emption from critical sections.
2016-12-25 06:54:43 -06:00
Gregory Nutt
efb86382c3
SMP: Back out deferred IRQ locking. This was accidentally merged into master and it looks like it is going to be more work than I thought to get it working again. Changes will go to the irqlock branch.
2016-12-24 19:53:37 -06:00
Gregory Nutt
3af6b2a9a6
Update a comment
2016-12-24 19:01:07 -06:00
Gregory Nutt
f55bad863b
SMP: Fix logic error in last change: Deferred restoration of IRQ lock only applies if the context switch was on this CPU.
2016-12-24 18:52:58 -06:00
Gregory Nutt
36b676eea6
SMP sched_unlock: Should merging depend on g_cpu_irqlock or not? Let's at least be consistent. And don't use irqcount; use g_cpu_irqlock.
2016-12-24 13:45:11 -06:00
Gregory Nutt
d75a7643d0
Fix a trivial typo
2016-12-23 13:01:20 -06:00
Gregory Nutt
e6fff09ef8
Implement deferred IRQ locking. So far only form ARMv7-M.
2016-12-23 07:55:41 -06:00
Gregory Nutt
d648f9c8b4
Add task_testcancel()
2016-12-10 16:34:14 -06:00
Gregory Nutt
f132960789
Add task_setcanceltype()
2016-12-10 16:06:14 -06:00
Gregory Nutt
5fb207eb36
Add task_setcancelstate()
2016-12-10 15:16:46 -06:00
Gregory Nutt
698597a838
task_delete() now obeys all cancellation point semantics.
2016-12-10 14:39:19 -06:00
Gregory Nutt
6997cda1b5
Grrr... cloned typos!
2016-12-10 09:45:55 -06:00
Gregory Nutt
842ec7e612
ifdef out some non-reachable code
2016-12-10 09:43:04 -06:00
Gregory Nutt
b52e4e5ecd
Move cancellation point definitions to their own header file.
2016-12-10 09:08:26 -06:00
Gregory Nutt
bc3ca25cc7
Cancellation points: Close up some logic to eliminte some race conditions.
2016-12-10 08:36:58 -06:00
Gregory Nutt
e62b3bccd3
pthread_setcanceltype() and pthread_testcancel() do not have to be system calls if cancellation points are not enabled.
2016-12-10 07:40:48 -06:00
Gregory Nutt
a0f567f4a3
Update TODO, cosmetic changes, spelling -- US English spells it canceled and canceling vs cancelled and cancelling. No idea why.
2016-12-09 18:39:40 -06:00
Gregory Nutt
018eb7c1d2
Cancellation points no longer depend on EXPERIMENTAL
2016-12-09 17:44:37 -06:00
Gregory Nutt
a76e729b0d
Trivial, cosmetic
2016-12-09 17:27:57 -06:00
Gregory Nutt
113d8bdcca
Fix some SMP-related compilation errors
2016-12-09 17:10:59 -06:00
Gregory Nutt
78cdc9f113
Fix a typo in a debug assertion.
2016-12-09 16:59:10 -06:00
Gregory Nutt
7ee0862e67
Merge remote-tracking branch 'origin/master' into cancelpt
2016-12-09 16:54:15 -06:00
Gregory Nutt
b07964461e
pthread_mutex_destroy(): Fix an error in destorynig a mutex which can occur after a pthread has been canceled while holding the mutex.
2016-12-09 16:53:29 -06:00
Gregory Nutt
7fce8022c6
Finishes all cancellation point logic
2016-12-09 16:50:34 -06:00
Gregory Nutt
d8783a7345
Update Documentation
2016-12-09 14:41:54 -06:00
Gregory Nutt
3eba0acb1c
More cancellation points.
2016-12-09 13:49:36 -06:00
Gregory Nutt
c9ca97b4b5
cancellation points are basically function. More tested is needed and additional cancellation points must be implemented before this can be merged back to master.
2016-12-09 12:01:18 -06:00
Gregory Nutt
018db84567
Flesh out more cancellation point logic.
2016-12-09 10:31:40 -06:00
Gregory Nutt
d35e589d56
Flesh basic cancellation point support
2016-12-09 09:44:23 -06:00
Gregory Nutt
82a79b9c1b
Add framework for cancellation point support.
2016-12-09 08:13:28 -06:00
Gregory Nutt
acaae12e8b
Add pthread_testcancel(), pthread_testcancel(), and definitiions for cancellation types.
2016-12-09 07:23:00 -06:00
Gregory Nutt
6224e47533
pthread cleanup stack: Replace critical section with sched_lock/unlock(). The cleanup stack modification only needs to have the TCB stationary. The stack is never modified from interrupt level logic
2016-12-08 14:33:02 -06:00
Gregory Nutt
ab43681f15
Update TODO and some comments.
2016-12-08 10:24:40 -06:00
Gregory Nutt
a1fbc2ad0d
pthreads: Add pthread_cleanup_push() and pthread_cleanup_pop()
2016-12-08 09:27:13 -06:00
Gregory Nutt
7632dfd6c7
Update some comments.
2016-12-08 07:52:02 -06:00
Gregory Nutt
a7b688e87b
sched notes: Add additional note to see if/when CPU is started in SMP mode.
2016-12-07 09:08:20 -06:00
Gregory Nutt
9ed0387379
Olimex-LPC1766-STK: Enable procfs in NSH configuration. Automount /proc on startup.
2016-12-05 08:52:40 -06:00
Masayuki Ishikawa
13c9031a8d
Fix DEBUGASSERT() in group_signal.c
2016-12-04 06:52:08 -06:00
Gregory Nutt
b78c3fcc30
Finish backing out previous change
2016-11-30 08:13:43 -06:00
Gregory Nutt
e6eb2e8bfa
Back out the last change. I just noticed some complexities that need to be verified before this is released onto the world.
2016-11-30 07:41:48 -06:00
Gregory Nutt
8453343426
scheduler instrumentation: Add a little more protection for the SMP case
2016-11-30 07:24:15 -06:00
Gregory Nutt
9ee3f3b933
sched_note: Permit spinlock and critical section notes in in-memory buffer iff sched_not_get() interfaces is disabled.
2016-11-28 18:36:26 -06:00
Gregory Nutt
00215fbc98
sched_note: Add spinlock instrumentation; In SMP configurations, select to log only notes from certain CPUs
2016-11-28 10:33:46 -06:00
Gregory Nutt
d65be718c2
sched_note: Extend OS instrumentation to include some SMP events.
2016-11-27 17:14:57 -06:00
Gregory Nutt
e3fe320e08
SMP: Add support for linking spinlocks into a special, non-cached memory region.
2016-11-26 08:47:03 -06:00
Gregory Nutt
1d06e786e1
SMP: Clean-up and simplication of logic that I implemented late last night.
2016-11-26 07:05:27 -06:00
Gregory Nutt
a0e1af2614
SMP: Fix yet another potential deadlock
2016-11-25 23:04:27 -06:00
Gregory Nutt
eb9f8074c0
Update comments
2016-11-24 09:56:43 -06:00
Gregory Nutt
7bec4ffeec
Update some comments
2016-11-23 17:40:01 -06:00
Gregory Nutt
d4037a30aa
Update some comments
2016-11-23 13:20:18 -06:00
Gregory Nutt
f90525a5d1
SMP: Update some comments; trivial improvement by inlining static function.
2016-11-22 16:48:57 -06:00
Gregory Nutt
bac7153609
SMP: Add logic to avoid a deadlock condition when CPU1 is hung waiting for g_cpu_irqlock and CPU0 is waitin for g_cpu_paused
2016-11-22 11:34:16 -06:00
Gregory Nutt
130bfa3f6b
Remove a assertion condition that appears to rarely cause false-alarm assertions. Teported by Petteri Aimonen
2016-11-21 14:43:56 -06:00
Gregory Nutt
558784d06f
Spinlocks: Added capability to provide architecture-specific memory barriers. This was for i.MX6 but does not help with the SMP problems. It is still a good feature.
2016-11-21 11:55:59 -06:00
Gregory Nutt
2d1765a014
Remove more of those annoying empty comment blocks.
2016-11-21 07:34:27 -06:00
Gregory Nutt
0029c04dad
task_restart: Make sure new task starts with pre-emption disabled and not in a critical section.
2016-11-21 07:33:23 -06:00
Gregory Nutt
cee8d59b58
Update TODO list
2016-11-20 12:26:08 -06:00
Gregory Nutt
e24f281401
This commit adds a new internal interfaces and fixes a problem with three APIs in the SMP configuration. The new internal interface is sched_cpu_pause(tcb). This function will pause a CPU if the task associated with 'tcb' is running on that CPU. This allows a different CPU to modify that OS data stuctures associated with the CPU. When the other CPU is resumed, those modifications can safely take place.
...
The three fixes are to handle cases in the SMP configuration where one CPU does need to make modifications to TCB and data structures on a task that could be running running on another CPU. Those three cases are task_delete(), task_restart(), and execution of signal handles. In all three cases the solutions is basically the same: (1) Call sched_cpu_pause(tcb) to pause the CPU on which the task is running, (2) perform the necessary operations, then (3) call up_cpu_resume() to restart the paused CPU.
2016-11-20 07:57:18 -06:00
Gregory Nutt
f40fbaa4b9
sched/task: task_restart() test not supported on SMP systems. This is not fully implemented.
2016-11-19 11:41:05 -06:00
Rajan Gill
0d8e191d69
sched/clock: Correct calculation for the case of Tickless mode with a 32-bit timer. In that case, the calculation was returning millisecond accuracy. That is not good when the timer accuracy is < 1 msec.
2016-11-19 09:55:21 -06:00
Gregory Nutt
5ca9128c38
Update comments
2016-11-19 08:33:55 -06:00
Gregory Nutt
ceacacbc63
vfork(): Fix a race condition in the SMP case. Existing logic depended on the fact that the child would not run until waitpid was called because the child had the same priority as the parent. BUT in the SMP case that is not true... the child may run immediately on a different CPU.
2016-11-19 07:30:01 -06:00
