Implement user-mode work queues
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5712 42af7a65-404d-4744-a932-0658087f49c3
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@ -4255,5 +4255,8 @@
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(2013-03-05)
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* libc/wqueue: Work queue logic moved from sched/ to libc/wqueue. It
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is not really core OS functionality and this move helps prepare for
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user-space work queues.
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user-space work queues. (2013-03-05)
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* libc/wqueue: Implemented user-space work queues. These will not
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get tested until the next time I attempt a NuttX kernel build.
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(2013-03-05).
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21
TODO
21
TODO
@ -1,4 +1,4 @@
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NuttX TODO List (Last updated February 5, 2013)
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NuttX TODO List (Last updated March 5, 2013)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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This file summarizes known NuttX bugs, limitations, inconsistencies with
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@ -6,7 +6,7 @@ standards, things that could be improved, and ideas for enhancements.
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nuttx/
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(11) Task/Scheduler (sched/)
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(10) Task/Scheduler (sched/)
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(1) Memory Managment (mm/)
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(3) Signals (sched/, arch/)
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(2) pthreads (sched/)
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@ -126,23 +126,6 @@ o Task/Scheduler (sched/)
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Status: Open
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Priority: Low -- There is no plan to implement this.
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Title: USER-SPACE WORK QUEUES
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Description: There has been some use of work queues that has crept into some
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user code. I am thinking of NxWidgets::CNxTimer. That timer
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logic was originally implemented (correctly) using POSIX timers,
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but was re-implemented using timed work.
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The issue is that NxWidgets::CNxTimer is a user-space application
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but the work queues are an OS internal feature. This will be a
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problem for KERNEL builds. Hooks and definitions have been added
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in include/nuttx/wqueue.h to support a user-space work queue, but
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the corresponding logic has not been implemented.
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The work queue logic will need to be moved from sched/ to libc/wqueue/
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Status: Open. No work will probably be done until a functional KERNEL build
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that includes NxWisges::CNxTimer is needed.
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Priority: Medium Low for now
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Title: INCOMPATIBILITES WITH execv() AND execl()
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Description: Simplified 'execl()' and 'execv()' functions are provided by
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NuttX. NuttX does not support processes and hence the concept
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@ -61,6 +61,10 @@
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* (which runs at the lowest of priority and may not be appropriate
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* if memory reclamation is of high priority). If CONFIG_SCHED_WORKQUEUE
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* is enabled, then the following options can also be used:
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* CONFIG_SCHED_HPWORK - Build the high priority work queue. To preserve
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* legacy behavior, CONFIG_SCHED_HPWORK is assumed to be true in a flat
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* build (CONFIG_SCHED_KERNEL=n) but must be defined in kernel mode
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* in order to build the high priority work queue.
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* CONFIG_SCHED_WORKPRIORITY - The execution priority of the worker
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* thread. Default: 192
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* CONFIG_SCHED_WORKPERIOD - How often the worker thread checks for
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@ -83,23 +87,85 @@
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* priority worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE.
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*/
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/* Is this a kernel build (CONFIG_NUTTX_KERNEL=y) */
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#ifdef CONFIG_NUTTX_KERNEL
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/* Yes.. kernel worker threads are not built in a kernel build when we are
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* building the user-space libraries.
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*/
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# ifndef __KERNEL__
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# undef CONFIG_SCHED_HPWORK
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# undef CONFIG_SCHED_LPWORK
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/* User-space worker threads are not built in a kernel build when we are
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* building the kernel-space libraries.
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*/
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# else
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# undef CONFIG_SCHED_USRWORK
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# endif
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/* User-space worker threads are not built in a flat build
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* (CONFIG_NUTTX_KERNEL=n)
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*/
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#else
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/* To preserve legacy behavior, CONFIG_SCHED_HPWORK is assumed to be true
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* in a flat build (CONFIG_SCHED_KERNEL=n) but must be defined in kernel
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* mode in order to build the high priority work queue.
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*/
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# undef CONFIG_SCHED_HPWORK
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# undef CONFIG_SCHED_USRWORK
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# define CONFIG_SCHED_HPWORK 1
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#endif
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/* We never build the low priority work queue without building the high
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* priority work queue.
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*/
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#if defined(CONFIG_SCHED_LPWORK) && !defined(CONFIG_SCHED_HPWORK)
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# error "CONFIG_SCHED_LPWORK defined, but CONFIG_SCHED_HPWORK not defined"
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# undef CONFIG_SCHED_LPWORK
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#endif
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/* We might not be building any work queue support in this context */
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#if !defined(CONFIG_SCHED_HPWORK) && !defined(CONFIG_SCHED_LPWORK) && !defined(CONFIG_SCHED_USRWORK)
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# undef CONFIG_SCHED_WORKQUEUE
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#endif
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#ifdef CONFIG_SCHED_WORKQUEUE
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/* We are building work queues... Work queues need signal support */
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#if defined(CONFIG_SCHED_WORKQUEUE) && defined(CONFIG_DISABLE_SIGNALS)
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# warning "Worker thread support requires signals"
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#endif
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#ifndef CONFIG_SCHED_WORKPRIORITY
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# define CONFIG_SCHED_WORKPRIORITY 192
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#endif
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/* High priority, kernel work queue configuration ***************************/
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#ifndef CONFIG_SCHED_WORKPERIOD
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# define CONFIG_SCHED_WORKPERIOD (50*1000) /* 50 milliseconds */
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#endif
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#ifdef CONFIG_SCHED_HPWORK
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#ifndef CONFIG_SCHED_WORKSTACKSIZE
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# define CONFIG_SCHED_WORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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#endif
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# ifndef CONFIG_SCHED_WORKPRIORITY
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# define CONFIG_SCHED_WORKPRIORITY 192
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# endif
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# ifndef CONFIG_SCHED_WORKPERIOD
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# define CONFIG_SCHED_WORKPERIOD (50*1000) /* 50 milliseconds */
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# endif
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# ifndef CONFIG_SCHED_WORKSTACKSIZE
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# define CONFIG_SCHED_WORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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/* Low priority kernel work queue configuration *****************************/
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#ifdef CONFIG_SCHED_LPWORK
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# ifndef CONFIG_SCHED_LPWORKPRIORITY
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# define CONFIG_SCHED_LPWORKPRIORITY 50
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# endif
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@ -111,44 +177,88 @@
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# ifndef CONFIG_SCHED_LPWORKSTACKSIZE
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# define CONFIG_SCHED_LPWORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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#endif
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/* How many worker threads are there? */
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#ifdef CONFIG_SCHED_LPWORK
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# define NWORKERS 2
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#else
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# define NWORKERS 1
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#endif
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/* Work queue IDs (indices):
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*
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* Kernel Work Queues:
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* HPWORK: This ID of the high priority work queue that should only be used for
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* hi-priority, time-critical, driver bottom-half functions.
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*
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* LPWORK: This is the ID of the low priority work queue that can be used for any
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* purpose. if CONFIG_SCHED_LPWORK is not defined, then there is only one kernel
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* work queue and LPWORK == HPWORK.
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*
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* User Work Queue:
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* USRWORK: CONFIG_NUTTX_KERNEL and CONFIG_SCHED_USRWORK are defined, then NuttX
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* will also support a user-accessible work queue. Otherwise, USRWORK == LPWORK.
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/* The high priority worker thread should be higher priority than the low
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* priority worker thread.
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*/
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#define HPWORK 0
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#ifdef CONFIG_SCHED_LPWORK
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# define LPWORK (HPWORK+1)
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#else
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# define LPWORK HPWORK
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#if CONFIG_SCHED_LPWORKPRIORITY > CONFIG_SCHED_WORKPRIORITY
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# warning "The Lower priority worker thread has the higher priority"
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#endif
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#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_SCHED_USRWORK)
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# warning "Feature not implemented"
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# define USRWORK (LPWORK+1)
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#endif /* CONFIG_SCHED_LPWORK */
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#endif /* CONFIG_SCHED_HPWORK */
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/* User space work queue configuration **************************************/
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#ifdef CONFIG_SCHED_USRWORK
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# ifndef CONFIG_SCHED_USRWORKPRIORITY
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# define CONFIG_SCHED_USRWORKPRIORITY 50
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# endif
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# ifndef CONFIG_SCHED_USRWORKPERIOD
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# define CONFIG_SCHED_USRWORKPERIOD (50*1000) /* 50 milliseconds */
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# endif
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# ifndef CONFIG_SCHED_USRWORKSTACKSIZE
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# define CONFIG_SCHED_USRWORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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#endif /* CONFIG_SCHED_USRWORK */
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/* How many worker threads are there? In the user-space phase of a kernel
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* build, there will be no more than one.
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*
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* Work queue IDs (indices):
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*
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* Kernel Work Queues: There are none and any attempts to use them
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* should generate errors.
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*
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* User Work Queue: Will be available if CONFIG_SCHED_USRWORK is defined
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*/
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#if defined(CONFIG_NUTTX_KERNEL) && !defined(__KERNEL__)
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# ifdef CONFIG_SCHED_USRWORK
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# define NWORKERS 1
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# define USRWORK 0
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# endif
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#else
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# define USRWORK LPWORK
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#endif
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/* In a flat build (CONFIG_NUTTX_KERNEL=n) or during the kernel phase of
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* the kernel build, there may be 0, 1, or 2 work queues.
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*
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* Work queue IDs (indices):
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*
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* Kernel Work Queues:
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* HPWORK: This ID of the high priority work queue that should only be
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* used for hi-priority, time-critical, driver bottom-half functions.
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*
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* LPWORK: This is the ID of the low priority work queue that can be
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* used for any purpose. if CONFIG_SCHED_LPWORK is not defined, then
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* there is only one kernel work queue and LPWORK == HPWORK.
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*
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* User Work Queue:
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* USRWORK: In the kernel phase a a kernel build, there should be no
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* references to user-space work queues. That would be an error.
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* Otherwise, in a flat build, user applications will use the lower
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* priority work queue (if there is one).
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*/
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# define HPWORK 0
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# ifdef CONFIG_SCHED_LPWORK
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# define LPWORK (HPWORK+1)
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# define NWORKERS 2
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# else
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# define LPWORK HPWORK
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# define NWORKERS 1
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# endif
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# ifndef CONFIG_NUTTX_KERNEL
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# define USRWORK LPWORK
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# endif
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#endif /* CONFIG_NUTTX_KERNEL && !__KERNEL__ */
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/****************************************************************************
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* Public Types
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@ -202,22 +312,50 @@ extern "C"
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* logic.
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*/
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#ifdef CONFIG_NUTTX_KERNEL
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/* Play some games in the kernel mode build to assure that different
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* naming is used for the global work queue data structures. This may
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* not be necessary but it safer.
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*/
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# ifdef __KERNEL__
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EXTERN struct wqueue_s g_kernelwork[NWORKERS];
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# define g_work g_kernelwork
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# else
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EXTERN struct wqueue_s g_usrwork[NWORKERS];
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# define g_work g_usrwork
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# endif
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#else /* CONFIG_NUTTX_KERNEL */
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EXTERN struct wqueue_s g_work[NWORKERS];
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#endif /* CONFIG_NUTTX_KERNEL */
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: work_hpthread and work_lpthread
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* Name: work_hpthread, work_lpthread, and work_usrthread
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*
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* Description:
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* These are the main worker threads that performs actions placed on the
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* work lists. One thread also performs periodic garbage collection (that
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* is performed by the idle thread if CONFIG_SCHED_WORKQUEUE is not defined).
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* These are the worker threads that performs actions placed on the work
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* lists.
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*
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* These entrypoints are referenced by OS internally and should not be
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* accessed by application logic.
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* work_hpthread and work_lpthread: These are the kernel mode work queues
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* (also build in the flat build). One of these threads also performs
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* periodic garbage collection (that is otherwise performed by the idle
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* thread if CONFIG_SCHED_WORKQUEUE is not defined).
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*
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* These worker threads are started by the OS during normal bringup.
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*
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* work_usrthread: This is a user mode work queue. It must be started
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* by application code by calling work_usrstart().
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*
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* All of these entrypoints are referenced by OS internally and should not
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* not be accessed by application logic.
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*
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* Input parameters:
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* argc, argv (not used)
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@ -227,12 +365,37 @@ EXTERN struct wqueue_s g_work[NWORKERS];
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_HPWORK
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int work_hpthread(int argc, char *argv[]);
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#endif
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#ifdef CONFIG_SCHED_LPWORK
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int work_lpthread(int argc, char *argv[]);
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#endif
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#ifdef CONFIG_SCHED_USRWORK
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int work_usrthread(int argc, char *argv[]);
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#endif
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/****************************************************************************
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* Name: work_usrstart
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*
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* Description:
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* Start the user mode work queue.
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*
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* Input parameters:
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* None
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*
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* Returned Value:
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* The task ID of the worker thread is returned on success. A negated
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* errno value is returned on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_USRWORK
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int work_usrstart(void);
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#endif
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/****************************************************************************
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* Name: work_queue
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*
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@ -324,4 +487,5 @@ int work_signal(int qid);
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_SCHED_WORKQUEUE */
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#endif /* __INCLUDE_NUTTX_WQUEUE_H */
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113
libc/Kconfig
113
libc/Kconfig
@ -346,7 +346,118 @@ config ARCH_BZERO
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endif
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comment "Non-standard Helper Functions"
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comment "Non-standard Library Support"
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config SCHED_WORKQUEUE
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bool "Enable worker thread"
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default n
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depends on !DISABLE_SIGNALS
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---help---
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Create a dedicated "worker" thread to handle delayed processing from interrupt
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handlers. This feature is required for some drivers but, if there are no
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complaints, can be safely disabled. The worker thread also performs
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garbage collection -- completing any delayed memory deallocations from
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interrupt handlers. If the worker thread is disabled, then that clean up will
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be performed by the IDLE thread instead (which runs at the lowest of priority
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and may not be appropriate if memory reclamation is of high priority).
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if SCHED_WORKQUEUE
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config SCHED_HPWORK
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bool "High priority (kernel) worker thread"
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default y
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---help---
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If SCHED_WORKQUEUE is defined, then a single, high priority work queue is
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created by default. This high priority worker thread is intended to serve
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as the "bottom half" for driver interrupt handling.
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if SCHED_HPWORK
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config SCHED_WORKPRIORITY
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int "High priority worker thread priority"
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default 192
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---help---
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The execution priority of the worker thread. Default: 192
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config SCHED_WORKPERIOD
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int "High priority worker thread period"
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default 50000
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---help---
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How often the worker thread checks for work in units of microseconds.
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Default: 50*1000 (50 MS).
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config SCHED_WORKSTACKSIZE
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int "High priority worker thread stack size"
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default 2048
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depends on SCHED_WORKQUEUE
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---help---
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The stack size allocated for the worker thread. Default: 2K.
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config SCHED_LPWORK
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bool "Low priority (kernel) worker thread"
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default n
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---help---
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If SCHED_WORKQUEUE is defined, then a single work queue is created by
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default. If SCHED_LPWORK is also defined then an additional, lower-
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priority work queue will also be created. This lower priority work
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queue is better suited for more extended processing (such as file system
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clean-up operations)
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if SCHED_LPWORK
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config SCHED_LPWORKPRIORITY
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int "Low priority worker thread priority"
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default 50
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---help---
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The execution priority of the lopwer priority worker thread. Default: 192
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config SCHED_LPWORKPERIOD
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int "Low priority worker thread period"
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default 50000
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---help---
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How often the lower priority worker thread checks for work in units
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of microseconds. Default: 50*1000 (50 MS).
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config SCHED_LPWORKSTACKSIZE
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int "Low priority worker thread stack size"
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default 2048
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---help---
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The stack size allocated for the lower priority worker thread. Default: 2K.
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endif # SCHED_LPWORK
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endif # SCHED_HPWORK
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if NUTTX_KERNEL
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config SCHED_USRWORK
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bool "User mode worker thread"
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default n
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---help---
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User space work queues can also be made available for deferred processing in the NuttX kernel build.
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if SCHED_USRWORK
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config SCHED_LPWORKPRIORITY
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int "User mode priority worker thread priority"
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default 50
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---help---
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The execution priority of the lopwer priority worker thread. Default: 192
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config SCHED_LPWORKPERIOD
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int "User mode worker thread period"
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default 50000
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---help---
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How often the lower priority worker thread checks for work in units
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of microseconds. Default: 50*1000 (50 MS).
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config SCHED_LPWORKSTACKSIZE
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int "User mode worker thread stack size"
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default 2048
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---help---
|
||||
The stack size allocated for the lower priority worker thread. Default: 2K.
|
||||
|
||||
endif # SCHED_USRWORK
|
||||
endif # NUTTX_KERNEL
|
||||
endif # SCHED_WORKQUEUE
|
||||
|
||||
config LIB_KBDCODEC
|
||||
bool "Keyboard CODEC"
|
||||
|
||||
@ -39,6 +39,10 @@ ifeq ($(CONFIG_SCHED_WORKQUEUE),y)
|
||||
|
||||
CSRCS += work_thread.c work_queue.c work_cancel.c work_signal.c
|
||||
|
||||
ifeq ($(CONFIG_NUTTX_KERNEL),y)
|
||||
CSRCS += work_usrstart.c
|
||||
endif
|
||||
|
||||
# Add the wqueue directory to the build
|
||||
|
||||
DEPPATH += --dep-path wqueue
|
||||
|
||||
@ -65,10 +65,30 @@
|
||||
* Public Variables
|
||||
****************************************************************************/
|
||||
|
||||
/* The state of each work queue */
|
||||
/* The state of each work queue. */
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
|
||||
/* Play some games in the kernel mode build to assure that different
|
||||
* naming is used for the global work queue data structures. This may
|
||||
* not be necessary but it safer.
|
||||
*
|
||||
* In this case g_work is #define'd to be either g_kernelwork or
|
||||
* g_usrwork in include/nuttx/wqueue.h
|
||||
*/
|
||||
|
||||
# ifdef __KERNEL__
|
||||
struct wqueue_s g_kernelwork[NWORKERS];
|
||||
# else
|
||||
struct wqueue_s g_usrwork[NWORKERS];
|
||||
# endif
|
||||
|
||||
#else /* CONFIG_NUTTX_KERNEL */
|
||||
|
||||
struct wqueue_s g_work[NWORKERS];
|
||||
|
||||
#endif /* CONFIG_NUTTX_KERNEL */
|
||||
|
||||
/****************************************************************************
|
||||
* Private Variables
|
||||
****************************************************************************/
|
||||
@ -181,12 +201,24 @@ static void work_process(FAR struct wqueue_s *wqueue)
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: work_hpthread and work_lpthread
|
||||
* Name: work_hpthread, work_lpthread, and work_usrthread
|
||||
*
|
||||
* Description:
|
||||
* These are the main worker threads that performs actions placed on the
|
||||
* work lists. One thread also performs periodic garbage collection (that
|
||||
* is performed by the idle thread if CONFIG_SCHED_WORKQUEUE is not defined).
|
||||
* These are the worker threads that performs actions placed on the work
|
||||
* lists.
|
||||
*
|
||||
* work_hpthread and work_lpthread: These are the kernel mode work queues
|
||||
* (also build in the flat build). One of these threads also performs
|
||||
* periodic garbage collection (that is otherwise performed by the idle
|
||||
* thread if CONFIG_SCHED_WORKQUEUE is not defined).
|
||||
*
|
||||
* These worker threads are started by the OS during normal bringup.
|
||||
*
|
||||
* work_usrthread: This is a user mode work queue. It must be started
|
||||
* by application code by calling work_usrstart().
|
||||
*
|
||||
* All of these entrypoints are referenced by OS internally and should not
|
||||
* not be accessed by application logic.
|
||||
*
|
||||
* Input parameters:
|
||||
* argc, argv (not used)
|
||||
@ -196,6 +228,8 @@ static void work_process(FAR struct wqueue_s *wqueue)
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_SCHED_HPWORK
|
||||
|
||||
int work_hpthread(int argc, char *argv[])
|
||||
{
|
||||
/* Loop forever */
|
||||
@ -224,6 +258,7 @@ int work_hpthread(int argc, char *argv[])
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SCHED_LPWORK
|
||||
|
||||
int work_lpthread(int argc, char *argv[])
|
||||
{
|
||||
/* Loop forever */
|
||||
@ -250,5 +285,26 @@ int work_lpthread(int argc, char *argv[])
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SCHED_LPWORK */
|
||||
#endif /* CONFIG_SCHED_HPWORK */
|
||||
|
||||
#ifdef CONFIG_SCHED_USRWORK
|
||||
|
||||
int work_usrthread(int argc, char *argv[])
|
||||
{
|
||||
/* Loop forever */
|
||||
|
||||
for (;;)
|
||||
{
|
||||
/* Then process queued work. We need to keep interrupts disabled while
|
||||
* we process items in the work list.
|
||||
*/
|
||||
|
||||
work_process(&g_work[USRWORK]);
|
||||
}
|
||||
|
||||
return OK; /* To keep some compilers happy */
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SCHED_USRWORK */
|
||||
|
||||
#endif /* CONFIG_SCHED_WORKQUEUE */
|
||||
|
||||
118
libc/wqueue/work_usrstart.c
Normal file
118
libc/wqueue/work_usrstart.c
Normal file
@ -0,0 +1,118 @@
|
||||
/****************************************************************************
|
||||
* libc/wqueue/work_usrstart.c
|
||||
*
|
||||
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <sched.h>
|
||||
#include <errno.h>
|
||||
#include <assert.h>
|
||||
#include <debug.h>
|
||||
|
||||
#include <nuttx/wqueue.h>
|
||||
|
||||
#if defined(CONFIG_SCHED_WORKQUEUE) && defined(CONFIG_SCHED_USRWORK)
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Type Declarations
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Variables
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: work_usrstart
|
||||
*
|
||||
* Description:
|
||||
* Start the user mode work queue.
|
||||
*
|
||||
* Input parameters:
|
||||
* None
|
||||
*
|
||||
* Returned Value:
|
||||
* The task ID of the worker thread is returned on success. A negated
|
||||
* errno value is returned on failure.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int work_usrstart(void)
|
||||
{
|
||||
int errcode;
|
||||
|
||||
DEBUGASSERT(g_usrwork[USRWORK] == NULL);
|
||||
|
||||
/* Start a lower priority worker thread for other, non-critical continuation
|
||||
* tasks
|
||||
*/
|
||||
|
||||
svdbg("Starting user-mode worker thread\n");
|
||||
|
||||
g_usrwork[USRWORK].pid = TASK_CREATE("usrwork",
|
||||
CONFIG_SCHED_USRWORKPRIORITY,
|
||||
CONFIG_SCHED_USRWORKSTACKSIZE,
|
||||
(main_t)work_usrthread,
|
||||
(FAR char * const *)NULL);
|
||||
|
||||
errcode = errno;
|
||||
ASSERT(g_usrwork[USRWORK].pid > 0);
|
||||
if (g_usrwork[USRWORK].pid < 0)
|
||||
{
|
||||
sdbg("task_create failed: %d\n", errcode);
|
||||
return -errcode;
|
||||
}
|
||||
|
||||
return g_usrwork[USRWORK].pid;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SCHED_WORKQUEUE && CONFIG_SCHED_USRWORK */
|
||||
@ -245,74 +245,6 @@ config SDCLONE_DISABLE
|
||||
desciptors by task_create() when a new task is started. If
|
||||
set, all sockets will appear to be closed in the new task.
|
||||
|
||||
config SCHED_WORKQUEUE
|
||||
bool "Enable worker thread"
|
||||
default n
|
||||
depends on !DISABLE_SIGNALS
|
||||
---help---
|
||||
Create a dedicated "worker" thread to handle delayed processing from interrupt
|
||||
handlers. This feature is required for some drivers but, if there are no
|
||||
complaints, can be safely disabled. The worker thread also performs
|
||||
garbage collection -- completing any delayed memory deallocations from
|
||||
interrupt handlers. If the worker thread is disabled, then that clean up will
|
||||
be performed by the IDLE thread instead (which runs at the lowest of priority
|
||||
and may not be appropriate if memory reclamation is of high priority).
|
||||
|
||||
config SCHED_WORKPRIORITY
|
||||
int "Worker thread priority"
|
||||
default 192
|
||||
depends on SCHED_WORKQUEUE
|
||||
---help---
|
||||
The execution priority of the worker thread. Default: 192
|
||||
|
||||
config SCHED_WORKPERIOD
|
||||
int "Worker thread period"
|
||||
default 50000
|
||||
depends on SCHED_WORKQUEUE
|
||||
---help---
|
||||
How often the worker thread checks for work in units of microseconds.
|
||||
Default: 50*1000 (50 MS).
|
||||
|
||||
config SCHED_WORKSTACKSIZE
|
||||
int "Worker thread stack size"
|
||||
default 2048
|
||||
depends on SCHED_WORKQUEUE
|
||||
---help---
|
||||
The stack size allocated for the worker thread. Default: 2K.
|
||||
|
||||
config SCHED_LPWORK
|
||||
bool "Enable a lower priority worker thread"
|
||||
default n
|
||||
depends on SCHED_WORKQUEUE
|
||||
---help---
|
||||
If SCHED_WORKQUEUE is defined, then a single work queue is created by
|
||||
default. If SCHED_LPWORK is also defined then an additional, lower-
|
||||
priority work queue will also be created. This lower priority work
|
||||
queue is better suited for more extended processing (such as file system
|
||||
clean-up operations)
|
||||
|
||||
config SCHED_LPWORKPRIORITY
|
||||
int "Lower priority worker thread priority"
|
||||
default 50
|
||||
depends on SCHED_LPWORK
|
||||
---help---
|
||||
The execution priority of the lopwer priority worker thread. Default: 192
|
||||
|
||||
config SCHED_LPWORKPERIOD
|
||||
int "Lower priority worker thread period"
|
||||
default 50000
|
||||
depends on SCHED_LPWORK
|
||||
---help---
|
||||
How often the lower priority worker thread checks for work in units
|
||||
of microseconds. Default: 50*1000 (50 MS).
|
||||
|
||||
config SCHED_LPWORKSTACKSIZE
|
||||
int "Lower priority worker thread stack size"
|
||||
default 2048
|
||||
depends on SCHED_LPWORK
|
||||
---help---
|
||||
The stack size allocated for the lower priority worker thread. Default: 2K.
|
||||
|
||||
config SCHED_WAITPID
|
||||
bool "Enable waitpid() API"
|
||||
default n
|
||||
|
||||
@ -62,11 +62,26 @@
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/* If NuttX is built as a separately compiled module, then the the header
|
||||
/* If NuttX is built as a separately compiled module, then the config.h header
|
||||
* file should contain the address of the user module entry point. If not
|
||||
* then the default entry point is user_start.
|
||||
*/
|
||||
|
||||
/* Customize some strings */
|
||||
|
||||
#ifdef CONFIG_SCHED_WORKQUEUE
|
||||
# ifdef CONFIG_SCHED_HPWORK
|
||||
# if defined(CONFIG_SCHED_LPWORK)
|
||||
# define HPWORKNAME "hpwork"
|
||||
# define LPWORKNAME "lpwork"
|
||||
# elif defined(CONFIG_SCHED_USRWORK)
|
||||
# define HPWORKNAME "knlwork"
|
||||
# else
|
||||
# define HPWORKNAME "work"
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Private Types
|
||||
****************************************************************************/
|
||||
@ -147,9 +162,15 @@ int os_bringup(void)
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_SCHED_WORKQUEUE
|
||||
svdbg("Starting worker thread\n");
|
||||
#ifdef CONFIG_SCHED_HPWORK
|
||||
|
||||
g_work[HPWORK].pid = KERNEL_THREAD("work0", CONFIG_SCHED_WORKPRIORITY,
|
||||
#ifdef CONFIG_SCHED_LPWORK
|
||||
svdbg("Starting high-priority kernel worker thread\n");
|
||||
#else
|
||||
svdbg("Starting kernel worker thread\n");
|
||||
#endif
|
||||
|
||||
g_work[HPWORK].pid = KERNEL_THREAD(HPWORKNAME, CONFIG_SCHED_WORKPRIORITY,
|
||||
CONFIG_SCHED_WORKSTACKSIZE,
|
||||
(main_t)work_hpthread, (FAR char * const *)NULL);
|
||||
ASSERT(g_work[HPWORK].pid > 0);
|
||||
@ -159,14 +180,17 @@ int os_bringup(void)
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_SCHED_LPWORK
|
||||
svdbg("Starting worker thread\n");
|
||||
|
||||
g_work[LPWORK].pid = KERNEL_THREAD("work1", CONFIG_SCHED_LPWORKPRIORITY,
|
||||
svdbg("Starting low-priority kernel worker thread\n");
|
||||
|
||||
g_work[LPWORK].pid = KERNEL_THREAD(LPWORKNAME, CONFIG_SCHED_LPWORKPRIORITY,
|
||||
CONFIG_SCHED_LPWORKSTACKSIZE,
|
||||
(main_t)work_lpthread, (FAR char * const *)NULL);
|
||||
ASSERT(g_work[LPWORK].pid > 0);
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#endif /* CONFIG_SCHED_LPWORK */
|
||||
#endif /* CONFIG_SCHED_HPWORK */
|
||||
#endif /* CONFIG_SCHED_WORKQUEUE */
|
||||
|
||||
/* Once the operating system has been initialized, the system must be
|
||||
* started by spawning the user init thread of execution. This is the
|
||||
|
||||
@ -43,8 +43,8 @@
|
||||
"prctl","sys/prctl.h", "CONFIG_TASK_NAME_SIZE > 0","int","int","..."
|
||||
"clock_systimer","nuttx/clock.h","!defined(CONFIG_DISABLE_CLOCK)","uint32_t"
|
||||
"poll","poll.h","!defined(CONFIG_DISABLE_POLL) && (CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0)","int","FAR struct pollfd*","nfds_t","int"
|
||||
"posix_spawnp", defined(CONFIG_BINFMT_EXEPATH), "int","FAR pid_t *","FAR const char *","FAR const posix_spawn_file_actions_t *","FAR const posix_spawnattr_t *","FAR char *const []","FAR char *const []"
|
||||
"posix_spawn", !defined(CONFIG_BINFMT_EXEPATH), "int","FAR pid_t *","FAR const char *","FAR const posix_spawn_file_actions_t *","FAR const posix_spawnattr_t *","FAR char *const []","FAR char *const []"
|
||||
"posix_spawnp","spawn.h","defined(CONFIG_BINFMT_EXEPATH)","int","FAR pid_t *","FAR const char *","FAR const posix_spawn_file_actions_t *","FAR const posix_spawnattr_t *","FAR char *const []","FAR char *const []"
|
||||
"posix_spawn","spawn.h","!defined(CONFIG_BINFMT_EXEPATH)","int","FAR pid_t *","FAR const char *","FAR const posix_spawn_file_actions_t *","FAR const posix_spawnattr_t *","FAR char *const []","FAR char *const []"
|
||||
"pthread_barrier_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrier_t*"
|
||||
"pthread_barrier_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrier_t*","FAR const pthread_barrierattr_t*","unsigned int"
|
||||
"pthread_barrier_wait","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_barrier_t*"
|
||||
|
||||
|
Can't render this file because it has a wrong number of fields in line 2.
|
Loading…
Reference in New Issue
Block a user