1ac9558460
sched/irq and sched/sched: Measurement of interrupt handler duration used to be available only in Tickless mode since it used the high resolution Tickless timer to measure interrupt time. This commit adds CONFIG_SCHED_IRQMONITOR_GETTIME which, if enabled, will force the interrupt duration caculation to use the same high-resolution, platform-specific timer as is used with the Critical Section Monitor. This leads to two improvements: (1) You can now measure interrupt duration in non-Tickless mode, and (2) in either mode, the interrupt duration and the critical section measures will use the same high-resulotion timer and should, therefore, never be any descripancy due to different clock sources.
2018-11-26 11:29:20 -06:00
80e7107c9f
sched/irq/Make.defs: Fix warning about irq_csection.o appearing multiple times in the same rule.
2018-11-25 17:22:33 -06:00
4ca7b72a98
sched/Kconfig: Simplify some configurations. This adds configuration settings that control individual features, rather than long complex OR expressions that determines if an individual feature is required.
2018-11-25 11:50:15 -06:00
807d5bb4ae
Critical Section Monitor: Add low level timer support for simulation. Fix serial bugs and logic errors in initial implementation. Still does not work; takes assertions.
2018-11-24 15:07:12 -06:00
fc6084f311
Squashed commit of the following:
...
fs/procfs/fs_procfsproc: Extended the process ID ProcFS output to show per-thread maximum time for pre-emption disabled and maximum time within a critical section.
sched/sched/sched_critmonitor.c: Adds data collection logic in support of monitoring critical sections and pre-emption state.
2018-11-24 10:32:45 -06:00
dbf01d12b7
Assertions: Identify the running task correctly when dumping task state information. It takes time to switch to the target task after g_readytorun has been modified. If panic/assert happen during this period, the dump will contain the incorrect and confusing information due to the difference between the real running task and the return value of this_task(). This change resolve this problem by adding g_running_task to track the real running task through the context switch.
2018-11-15 07:11:51 -06:00
a7265d71c6
This commit adds support for default signal actions for SIGSTOP, SIGSTP, and SIGCONT.
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Squashed commit of the following:
Add procfs support to show stopped tasks. Add nxsig_action() to solve a chicken and egg problem: We needed to use sigaction to set default actions, but sigaction() would refuse to set actions if the default actions could not be caught or ignored.
sched/signal: Add configuration option to selectively enabled/disable default signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT. Fix some compilation issues.
sched/sched: Okay.. I figured out a way to handle state changes that may occur while they were stopped. If a task/thread was already blocked when SIGSTOP/SIGSTP was received, it will restart in the running state. I will appear that to the task/thread that the blocked condition was interrupt by a signal and returns the EINTR error.
sched/group and sched/sched: Finish framework for continue/resume logic.
sched/signal: Roughing out basic structure to support task suspend/resume
2018-08-30 10:27:18 -06:00
73c73af777
sched/irq/irq_dispatch.c: Fix my typo that was added while reviewing Xiang's changne.
2018-08-29 07:13:26 -06:00
347d10497c
sched/irq/irq_dispatch.c: Fix error 'ndx undeclared'
2018-08-29 06:10:52 -06:00
c9b24615a6
sched/irq: Monitor the irq execution time. This is very useful for measuring the interrupt latency.
2018-08-25 07:12:21 -06:00
38452007a3
sched/irq/irq_dispatch.c: Fix an error found in build testing.
2018-08-24 16:12:31 -06:00
2aa208ccf0
sched/irq/irq_procfs.c: Fix occasional computation error when fracpart >= 1000
2018-08-24 15:16:11 -06:00
d38be46655
sched/irq: Add support interrupt chains in NuttX. IRQ chain is very useful in these cases: (1) Multiple hardware connect to the same request line(e.g. PCI), (2) Need multiple driver to support one hardware block (like Linux MFD)
2018-08-24 15:10:23 -06:00
6cb606d42b
sched/irq/irq_dispatch.c: Ensure vector never points to NULL since interrupt may happen before irq_initialize()
2018-08-24 15:01:32 -06:00
e1202d2ed3
Replace all ASSERT with DEBUGASSERT to save the code space
2018-08-24 06:58:30 -06:00
8fdbb1e0a4
Elimate use of the non-standard type systime_t and replace it the equivalent, standard type clock_t
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Squashed commit of the following:
sched: Rename all use of system_t to clock_t.
syscall: Rename all use of system_t to clock_t.
net: Rename all use of system_t to clock_t.
libs: Rename all use of system_t to clock_t.
fs: Rename all use of system_t to clock_t.
drivers: Rename all use of system_t to clock_t.
arch: Rename all use of system_t to clock_t.
include: Remove definition of systime_t; rename all use of system_t to clock_t.
2018-06-16 12:16:13 -06:00
97ca4ef956
Merged in masayuki2009/nuttx.nuttx/change_copyright (pull request #621 )
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Change all Sony related copyright to conform with our company's internal rules.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
Approved-by: Gregory Nutt <gnutt@nuttx.org>
2018-04-04 12:35:47 +00:00
50ab5d638a
sched/task: It is not appropriate for logic in task_exit() to call the new version of this_task(). sched/irq: Remove redundant fetch of CPU index; configs/sabre-6qguad: update README.
2018-02-06 19:06:33 -06:00
0ba7853016
sched/irq: Fix a infinite recursion problem that a recent change introduced into the i.MX6 SMP implementation.
2018-02-06 09:18:03 -06:00
56bb76caca
sched/irq: Fix an error in a assertion introduced in commit 37c9b3d54a. Noted by Masayuki Ishikawa.
2018-02-05 21:13:42 -06:00
b884fb9fed
sched/sched: Extend the last global lock change to work with the lc823450-xgevk which does not support the atomic fetch add but does support disabling interprocessor interrupts. Disabling interprocessor interrupts will also guarantee that the TCB addres calculation is atomic.
2018-02-05 13:32:09 -06:00
37c9b3d54a
sched/sched: Implements a global scheduler lock capability as part of SMP support. This allows the scheduler to be locked with no knowledge or access to the TCB of the currently running task. This is necessary because accessing the TCB of the currenlty running task is, itself, a non-atomic operation. This global scheduler lock cpability was add just to support that atomic access to the TCB.
2018-02-05 13:12:36 -06:00
5beab6fbf0
spin_lock_irqsave() and spin_unlock_irqrestore() are only valid if the CPU supports global disabling of interrupts.
2018-02-04 15:41:22 -06:00
fad70bf90e
Update some comments
2018-02-03 09:35:46 -06:00
7cf88d7dbd
Make sure that labeling is used consistently in all function headers.
2018-02-01 10:00:02 -06:00
12e3e47d3c
Update comments, mostly spelling errors.
2018-01-27 09:37:46 -06:00
0080225473
sched/irq: Add a configuration option to show interrupt information via a procfs file.
2018-01-12 18:26:46 -06:00
b2adb4917f
arch/arm/src/lpc54xx: Add register level debug output for Ethernet testing. Fixed a few start up problems. Still hangs on start-up, however.
2017-12-31 11:11:57 -06:00
6150299f54
Merged in masayuki2009/nuttx.nuttx/irq_spinlock (pull request #550 )
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SMP: Introduce spin_lock_irqsave() and spin_unlock_irqrestore()
These APIs are simplified version of enter_critical_section() and
leave_critical_section() to protect data (e.g. registers) in SMP mode.
By using these APIs inside drivers, performace will be improved.
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
Approved-by: Gregory Nutt <gnutt@nuttx.org>
2017-12-07 19:39:04 +00:00
b274a97840
Miscellaneous fixes from astyle tool.
2017-08-14 17:19:27 -06:00
dffb8a67e3
Add entropy pool and strong random number generator
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Entropy pool gathers environmental noise from device drivers, user-space, etc., and returns good random numbers, suitable for cryptographic use. Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm for CSPRNG output.
Patch also adds /dev/urandom support for using entropy pool RNG and new 'getrandom' system call for getting randomness without file-descriptor usage (thus avoiding file-descriptor exhaustion attacks). The 'getrandom' interface is similar as 'getentropy' and 'getrandom' available on OpenBSD and Linux respectively.
2017-03-30 07:38:37 -06:00
e1218c4b4b
Smaller vector tables: Add irq_mapped_t.
2017-03-03 10:20:40 -06:00
c2b620b4f8
Implements support for smaller interrupt tables as described at http://www.nuttx.org/doku.php?id=wiki:howtos:smallvectors . This is largely the work of Mark Schulte. However, I have made several changes to match with the Wiki document. If you like the change, thanks go to Marc. For any errors you can blame me.
2017-03-03 09:20:25 -06:00
02b1e1ec1a
Fixes for coding standard: '*' needs to 'snuggle' with following variable name
2017-02-28 18:22:57 -06:00
840c5935a3
Correct a typo from one of the preceding commits.
2017-02-27 11:58:20 -06:00
b3222bbc8a
irq_dispatch: Add argument pointer to irq_dispatch
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Provide a user defined callback context for irq's, such that when
registering a callback users can provide a pointer that will get
passed back when the isr is called.
2017-02-27 06:27:56 -06:00
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
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
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
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
d45a81d643
Revert "SMP: Fix a error introduced in 36b676eea6 and fully decouple disabling of pre-emption from critical sections."
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This reverts commit 9aedf1bdec
2016-12-26 07:48:22 -06:00
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
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
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
d75a7643d0
Fix a trivial typo
2016-12-23 13:01:20 -06:00
e6fff09ef8
Implement deferred IRQ locking. So far only form ARMv7-M.
2016-12-23 07:55:41 -06:00
9ed0387379
Olimex-LPC1766-STK: Enable procfs in NSH configuration. Automount /proc on startup.
2016-12-05 08:52:40 -06:00
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
e3fe320e08
SMP: Add support for linking spinlocks into a special, non-cached memory region.
2016-11-26 08:47:03 -06:00
1d06e786e1
SMP: Clean-up and simplication of logic that I implemented late last night.
2016-11-26 07:05:27 -06:00
a0e1af2614
SMP: Fix yet another potential deadlock
2016-11-25 23:04:27 -06:00
7bec4ffeec
Update some comments
2016-11-23 17:40:01 -06:00
f90525a5d1
SMP: Update some comments; trivial improvement by inlining static function.
2016-11-22 16:48:57 -06:00
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
69e9f8638d
Most interrupt handling logic interacts with tasks via standard mechanism such as sem_post, sigqueue, mq_send, etc. This all call enter_critical_section and are assumed to be safe in the SMP case.
...
But certain logic interacts with tasks in different ways. The only one that comes to mind are wdogs. There is a tasking interface that to manipulate wdogs, and a different interface in the timer interrupt handling logic to manage wdog expirations.
In the normal case, this is fine. Since the tasking level code calls enter_critical_section, interrupts are disabled an no conflicts can occur. But that may not be the case in the SMP case. Most architectures do not permit disabling interrupts on other CPUs so enter_critical_section must work differently: Locks are required to protect code.
So this change adds locking (via enter_critical section) to wdog expiration logic for the the case if the SMP configuration.
2016-11-18 13:57:30 -06:00
78fd358023
Update some comments.
2016-11-18 08:20:52 -06:00
8602e8a8a9
SMP: irq_csection() has a bad assumption. It assumed that the state of certain variables. That was true on entry into the interrupt handler, but might change to the execution of logic within the interrupt handler.
2016-11-18 07:38:16 -06:00
8e029f019b
Update comments
2016-11-17 17:30:12 -06:00
47b52a2633
Fix an error in manually bringing in Sebastien's changes; Update some comments.
2016-11-17 16:15:06 -06:00
9acd57c819
Fix up some naming and update some comments.
2016-11-17 15:50:39 -06:00
558f4049d4
sched/irq/irq_csection: Fix a bad DEBUG assertion when SMP is enabled.
2016-11-17 15:36:27 -06:00
2c314464a8
Fix a typo in a comment
2016-11-17 08:03:45 -06:00
ccdc11d8ff
Fix typo in variable naming. g_cpu_irqset should be g_cpu_irqlock.
2016-11-17 06:37:24 -06:00
1c1564f0c1
Add logic to handled nested calls to enter_critical_section() from interrupts handlers (with SMP).
2016-11-16 22:45:08 -06:00
0c3207e86e
Fix backward logic in an assertion.
2016-11-16 21:48:27 -06:00
16f0b8fa96
Fix typos in DEBUASSERT statements
2016-11-16 19:58:51 -06:00
f1e4951a8d
Fix some comments
2016-11-16 19:11:31 -06:00
4ca653a1cc
Add some experimental changes to enter/leave_critical_section to deal with the case where interrupts are disabled only on the local CPU
2016-11-16 18:28:35 -06:00
5ce3b399d5
Correct some typos in comments
2016-11-15 16:48:40 -06:00
40d7216a22
Back out 65ab12 and parts of 21f92b
2016-11-15 15:44:43 -06:00
6683f01444
Trivial change to comment
2016-11-15 13:38:43 -06:00
21f92ba601
Review some SMP logic; update comments; refresh configuration.
2016-11-15 09:24:00 -06:00
65ab12fbb9
If SMP is enabled, if any interrupt handler calls enter_critical_section(), it should take the spinlock.
2016-11-15 08:37:58 -06:00
b53866c872
sched/irq: Change order for SMP case in enter_critical_section: Disble local interrupts BEFORE taking spinlock.
2016-11-15 07:54:18 -06:00
9fa1024eef
vector table should have dimension NR_IRQS, not NR_IRQS+1
2016-09-22 07:56:12 -06:00
2a751068e6
Without lowsyslog() *llerr() is not useful. Eliminate and replace with *err().
2016-06-20 12:44:38 -06:00
0c8c7fecf0
Add _ to the beginning of all debug macros to avoid name collisions
2016-06-16 12:33:32 -06:00
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
e99301d7c2
Rename *lldbg to *llerr
2016-06-11 14:55:27 -06:00
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
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
d20db82fcb
Scheduler instrumentation: Fix some associated with monitoring critical sections
2016-03-21 17:08:07 -06:00
7f19631338
sched/: Add option to buffer scheduler instrumentation data in memory.
2016-03-17 09:49:43 -06:00
320b70ebad
Update submodules
2016-03-12 13:24:38 -06:00
0fb035f76b
Standardize some naming in code section comments
2016-02-21 18:09:04 -06:00
72d3920295
Rename cpuset_t to cpu_set_t which is the type used in some non-standard Linux/GNU interfaces. Move definitions of cpu_set_t to include/sys/types.h. Add prototypes for sched_setaffinity(), sched_getaffinity(), pthread_attr_setaffinity_np(), pthread_attr_getaffinity_np(), pthread_setaffinity_np(), and pthread_getaffinity_np(). No implementation is yet in place.
2016-02-19 15:57:07 -06:00
b50325bb38
SMP: Add funtions to perform atomic bit set/clear operations; fix two errors in SMP macros
2016-02-17 13:20:01 -06:00
8ac12839c3
leave_critical_section: Fix text of whether spinlock should be released or not
2016-02-17 10:55:18 -06:00
384e51cb05
Add some additional schedule instrumentation
2016-02-16 15:21:45 -06:00
fccef49305
Cosmetic changes to comments
2016-02-15 13:48:08 -06:00
8399938138
SMP: I think we have to spinlock before we are possibly suspended
2016-02-15 10:15:07 -06:00
3c46fa3f9f
Fix a contention problem in the previous critical section design
2016-02-15 08:50:20 -06:00
c7df82147f
SMP: First cut integration of enter/leave_critical_section and the scheduler. There are some issues.
2016-02-15 08:06:17 -06:00
9cb2a6b1f9
Rename irqsave() and irqrestore() to up_irq_save() and up_irq_restore()
2016-02-14 16:19:15 -06:00
6e3107650d
nuttx/sched: Replace irqsave() with enter_critical_section(); replace irqrestore() with leave_critical_section()
2016-02-14 08:17:46 -06:00
d017e3eb2e
SMP: Forgot to add a file before the last commit
2016-02-13 10:25:36 -06:00
97cbd7112f
SMP: Implement enter/leave_critical_section
2016-02-13 10:23:16 -06:00
5b51a9fcdd
Standardize the width of all comment boxes in C files
2015-10-02 17:43:18 -06:00
cb9e27c3b0
Standardize naming used for public data and function groupings
2015-10-02 16:30:35 -06:00
b4423c1eed
Make some file section headers more consistent with standard
2015-04-08 06:47:36 -06:00
322f9f401c
Simplify how C source files are selected in the build
2014-10-07 07:42:36 -06:00
e1769b22f1
Remove os_internal.h it has been replace by several new header files under sched/. There have been some sneak inclusion paths via os_internal.h, so expect a few compilation errors for some architectures
2014-08-08 18:39:28 -06:00
85e8117062
Move interrupt dispatch logic from sched/ to sched/irq
2014-08-08 14:31:15 -06:00
Gregory Nutt