Gregory Nutt
6a20560ba2
Trivia fix to typo in comment
2016-10-26 12:29:36 -06:00
Gregory Nutt
3e13ed2400
Within the OS, when a thread obtains a semaphore count it must call sem_addholder() if CONFIG_PRIORITY_INHERITANCE is enabled. If a count is available, then sem_wait() calls sem_addholder(), otherwise it waited for the semaphore and called sem_addholder() when it eventually received the count.
...
This caused a problem when the thread calling sem_wait() was very low priority. When it received the count, there may be higher priority threads "hogging" the CPU that prevent the lower priority task from running and, as a result, the sem_addholder() may be delayed indefinitely.
The fix was to have sem_post() call sem_addholder() just before restarting the thread waiting for the semaphore count.
This problem was noted by Benix Vincent who also suggested the solution.
2016-10-26 07:23:15 -06:00
Gregory Nutt
8669183852
sched/pthread and task: When a pthread is started, there is a small bit of logic that will run on the thread of execution of the new pthread. In the case where the new pthread has a lower priority than the parent thread, then this could cause both the parent thread and the new pthread to be blocked at the priority of the lower priority pthread (assuming that CONFIG_PRIORITY_INHERITANCE is not selected).
...
This change temporarily boosts the priority of the new pthread to at least the priority of the new pthread to at least the priority of the parent thread. When that bit of logic has executed on the thread of execution of the new pthread, it will then drop to the correct priority (if necessary) before calling into the new pthread's entry point.
2016-10-01 11:38:22 -06:00
Gregory Nutt
75104b0808
Remove duplicate function prototype from wrong header file
2016-10-01 10:56:42 -06:00
Sagitta Li
9fa1024eef
vector table should have dimension NR_IRQS, not NR_IRQS+1
2016-09-22 07:56:12 -06:00
Gregory Nutt
f0b4705d57
Correct a comment
2016-09-15 13:10:42 -06:00
Gregory Nutt
e3bbfa2d85
mq_send() was not setting the errno value on certain failures to allocate a message
2016-09-15 12:42:24 -06:00
Gregory Nutt
368f241637
Correct some comments
2016-09-15 08:46:41 -06:00
Gregory Nutt
952268274a
sched/: Fix misplaced right bracket; remove redundant assertion.
2016-09-06 12:27:12 -06:00
Gregory Nutt
7582c2344c
sched/: Eliminate calculation of a possibly unused value.
2016-09-06 10:28:19 -06:00
Gregory Nutt
e034c78516
improve some assertions; add some comments.
2016-09-06 10:21:41 -06:00
Gregory Nutt
27919549f1
sched/: Simplify some child/parent logic
2016-09-06 08:40:55 -06:00
Gregory Nutt
05aa586aa6
sched/: Move fields related to parent/child task relationship out of TCB into group structure.
2016-09-06 08:28:31 -06:00
Gregory Nutt
858af4295c
The TCB nchildren field should not be incremented when pthreads are created.
2016-09-06 07:34:36 -06:00
Gregory Nutt
60b70f7dbb
Make xorshift128 re-entrant so that we do do have to suffer the overhad of serialization controls.
2016-08-21 07:47:53 -06:00
Gregory Nutt
53b2de18eb
Trivial typo fix
2016-08-20 13:23:41 -06:00
Gregory Nutt
300361539a
sched/sched_cpuload_oneshot: Use the oneshot timer with optional entropy to measuer cPU load if so configured.
2016-08-20 12:47:07 -06:00
Gregory Nutt
6f833be9d5
Separate XorShift128 PRNG from /dev/urandom and make it generally available.
2016-08-20 11:36:02 -06:00
Gregory Nutt
5ea77118aa
Explicitly initialize the group tg_exitsem with sem_init(). The existing logic worked because the correct initialization value is all zero, but it is better to initialize the semaphore explicitly. Noted by Jouko Holopainen.
2016-08-10 07:38:07 -06:00
Gregory Nutt
3404b3cb4a
sched/: Review and correct some stylistic inconsistencies
2016-08-07 08:32:11 -06:00
Gregory Nutt
18ce4ff57b
sched/: Review and correct some stylistic inconsistencies
2016-08-07 08:25:30 -06:00
Gregory Nutt
94d34bba47
Fix a typo in a Make.defs file
2016-07-28 09:46:28 -06:00
Gregory Nutt
309480d0f9
Merge branch 'timekeeping' of bitbucket.org:nuttx/nuttx
2016-07-28 09:34:00 -06:00
Gregory Nutt
7370d3171a
Move include/nuttx/lib.h to include/nuttx/lib/lib.h
2016-07-21 14:05:44 -06:00
Gregory Nutt
246773faa7
Rename CONFIG_SCHED_TIMEKEEPING to CONFIG_CLOCK_TIMEKEEPING. That is a better compartmentalized name.
2016-07-11 06:54:02 -06:00
Gregory Nutt
f47b69e1f0
Add support for adjtime system call
2016-07-10 16:55:32 -06:00
Gregory Nutt
c326b6320a
Add description of adjtime() from Linux man page
2016-07-10 16:47:06 -06:00
Max Neklyudov
8db29071da
timekeeping: initial implementation
2016-07-10 16:14:25 -06:00
Gregory Nutt
830af912a1
Add sig_raise()
2016-07-04 09:32:36 -06:00
Paul A. Patience
891113dac9
sched/semaphore: Fix setting EINVAL in sem_post() and sem_wait()
2016-06-28 10:15:52 -04:00
Gregory Nutt
62d8f839c7
SYSLOG: Now a two phase initialization. Some SYSLOG channels cannot be initialized until later in the bringup
2016-06-21 07:52:24 -06:00
Gregory Nutt
2a751068e6
Without lowsyslog() *llerr() is not useful. Eliminate and replace with *err().
2016-06-20 12:44:38 -06:00
Gregory Nutt
43eb04bb8f
Without lowsyslog() *llinfo() is not useful. Eliminate and replace with *info().
2016-06-20 11:59:15 -06:00
Gregory Nutt
f4c47636e7
SYSLOG: Debug output from the IDLE task should be forced like interrupt level output
2016-06-20 07:35:38 -06:00
Gregory Nutt
3fa41c0f18
Kconfig files: Fix some dependencies that have CONFIG_ in the variable name
2016-06-17 19:30:19 -06:00
Gregory Nutt
0c8c7fecf0
Add _ to the beginning of all debug macros to avoid name collisions
2016-06-16 12:33:32 -06:00
Gregory Nutt
f3ec664f63
Debug output level (error, warning, info) is now selectable on a per-subsystem, per-driver basis
2016-06-12 13:08:23 -06:00
Gregory Nutt
13cac3b592
sched/: Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.
2016-06-11 16:42:42 -06:00
Gregory Nutt
a1469a3e95
Add CONFIG_DEBUG_ERROR. Change names of *dbg() * *err()
2016-06-11 15:50:49 -06:00
Gregory Nutt
e99301d7c2
Rename *lldbg to *llerr
2016-06-11 14:55:27 -06:00
Gregory Nutt
86b79b33cf
Reserver the name 'err' for other purposes
2016-06-11 14:40:07 -06:00
Gregory Nutt
1cdc746726
Rename CONFIG_DEBUG to CONFIG_DEBUG_FEATURES
2016-06-11 14:14:08 -06:00
Gregory Nutt
fc3540cffe
Replace all occurrences of vdbg with vinfo
2016-06-11 11:59:51 -06:00
Gregory Nutt
3a74a438d9
Rename CONFIG_DEBUG_VERBOSE to CONFIG_DEBUG_INFO
2016-06-11 11:50:18 -06:00
Gregory Nutt
80d0b2736e
Reorder some logic: (1) set initial CPU IDLE task regsters AFTER allocating stack, (2) invalidate cache in CPU start-up BEFORE handling first interrupt.
2016-05-22 15:01:49 -06:00
Gregory Nutt
07acd5327a
SMP: Clean CPU0 D-Cache before starting new CPU; Invalidate D-Cache when new CPU started.
2016-05-20 12:39:02 -06:00
Gregory Nutt
32838fcc2c
enter/leave_critical_section: In SMP configuration, may attempt to access the task lists before they have been initialized
2016-05-18 09:17:01 -06:00
Gregory Nutt
3d87005e5a
Fix some compilation issues when certain combinations of debug options are selected.
2016-05-17 12:06:32 -06:00
Gregory Nutt
faca2fb1e7
ARMv7-A/i.MX6: Add logic to handle allocation of CPU IDLE thread stacks more efficiently
2016-05-13 11:39:42 -06:00
Gregory Nutt
70782b0f14
ARMv7-A i.MX6: More SMP logic. Still untested.
2016-05-12 15:04:46 -06:00
