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ADI操作系統(tǒng)

VDK的API描述

[ 作者：Open ADSP ] [ 來源：ADSP開源社區(qū) ] [ 發(fā)布時間：2011/4/13 ]

VDK實際上是一種帶API（Application ProgramInterface）函數(shù)庫的實時操作系統(tǒng)內(nèi)核。文中所有的VDK函數(shù)均在API函數(shù)庫中,有精確的周期數(shù)和運行時間。

以下包含了三個DSP和兩個不同版本的VDK

<---Timing in Cycles周期 --->			<-Timing in MicroSeconds時間->
vdsp5.0	vdsp4.5	vdsp3.5	vdsp5.0	vdsp4.5	vdsp3.5
Update 6	Base		Update 6	Base
BF533	BF535	2191	BF533	BF535	2191	API CALL API函數(shù)
600 mhz	350 mhz	160 mhz	600 mhz	350 mhz	160 mhz
emu	emu-warm	emu	emu	emu-warm	emu
73	Not Applicable	Not Applicable	0.12	Not Applicable	Not Applicable	AcquireMutex <no current owner>
74	Not Applicable	Not Applicable	0.12	Not Applicable	Not Applicable	AcquireMutex <nested Acquire>
252	Not Applicable	Not Applicable	0.42	Not Applicable	Not Applicable	AcquireMutex <mutex unavailable, context switch>
97	107	82	0.16	0.31	0.51	AllocateThreadSlot
96	109	88	0.16	0.31	0.55	AllocateThreadSlotEx
390	459	261	0.65	1.31	1.63	ClearEventBit <no context switch, bit changes>
138	183	97	0.23	0.52	0.61	ClearEventBit <no context switch, bit same>
657	872	686	1.10	2.49	4.29	ClearEventBit <with context switch >
52	98	45	0.09	0.28	0.28	ClearInterruptMaskBits
Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	ClearInterruptMaskBitsEx
17	25	16	0.03	0.07	0.10	ClearThreadError
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	CloseDevice
515	615	332	0.86	1.76	2.08	CreateDeviceFlag
173	253	169	0.29	0.72	1.06	CreateMessage
448	Not Applicable	Not Applicable	0.75	Not Applicable	Not Applicable	CreateMutex
1777	1839	1193	2.96	5.25	7.46	CreatePool <allocate memory now>
1275	1149	709	2.13	3.28	4.43	CreatePool <allocate memory later>
1746	1809	Not Applicable	2.91	5.17	Not Applicable	CreatePoolEx <allocate memory now>
1264	1127	Not Applicable	2.11	3.22	Not Applicable	CreatePoolEx <allocate memory later>
651	815	408	1.09	2.33	2.55	CreateSemaphore
1779	2141	1626	2.97	6.12	10.16	CreateThread <lower priority>
1836	2287	1906	3.06	6.53	11.91	CreateThread <higher priority - context switch>
1778	2150	1508	2.96	6.14	9.43	CreateThread <same priority - no context switch>
2949	3459	2673	4.92	9.88	16.71	CreateThreadEx <equal or lower priority>
3018	3604	3267	5.03	10.30	20.42	CreateThreadEx <higher priority - context switch>
394	495	232	0.66	1.41	1.45	DestroyDeviceFlag
159	233	197	0.27	0.67	1.23	DestroyMessage
168	260	445	0.28	0.74	2.78	DestroyMessageAndFreePayload
387	Not Applicable	Not Applicable	0.65			DestroyMutex
658	771	394	1.10	2.20	2.46	DestroyPool
389	460	174	0.65	1.31	1.09	DestroySemaphore
1285	1435	1240	2.14	4.10	7.75	DestroyThread <kReady> <delete space now>
208	250	281	0.35	0.71	1.76	DestroyThread <kReady> < delete space later>
199	283	272	0.33	0.81	1.70	DestroyThread <kSleeping>
173	220	236	0.29	0.63	1.48	DestroyThread <kSemaphoreBlocked>
215	305	295	0.36	0.87	1.84	DestroyThread <kSemaphoreBlockedWithTimeout>
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	DeviceIOCtl
69	110	52	0.12	0.31	0.33	DispatchThreadError (with context switch)
334	422	334	0.56	1.21	2.09	ForwardMessage
135	241	162	0.23	0.69	1.01	FreeBlock
323	391	141	0.54	1.12	0.88	Free (from C library, for comparison)
1306	1450	1076	2.18	4.14	6.73	FreeDestroyedThreads (one thread)
29	55	276	0.05	0.16	1.73	FreeMessagePayload
79	101	55	0.13	0.29	0.34	FreeThreadSlot
292	13	14	0.49	0.04	0.09	GetClockFrequency
21	11	16	0.04	0.03	0.10	GetEventBitValue
35	57	66	0.06	0.16	0.41	GetEventData
23	13	16	0.04	0.04	0.10	GetEventValue
19	16	Not Applicable	0.03	0.05	Not Applicable	GetHeapIndex
59	83	12	0.10	0.24	0.08	GetInterruptMask
Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	GetInterruptMaskEx
17	18	12	0.03	0.05	0.08	GetLastThreadError
17	18	63	0.03	0.05	0.39	GetLastThreadErrorValue
43	63	33	0.07	0.18	0.21	GetMessageDetails
29	39	32	0.05	0.11	0.20	GetMessagePayload
27	33	46	0.05	0.09	0.29	GetMessageReceiveInfo
46	66	44	0.08	0.19	0.28	GetNumAllocatedBlocks
45	66	40	0.08	0.19	0.25	GetNumFreeBlocks
38	74	44	0.06	0.21	0.28	GetPriority
48	80	11	0.08	0.23	0.07	GetSemaphoreValue
14	14	13	0.02	0.04	0.08	GetThreadHandle
27	25	49	0.05	0.07	0.31	GetThreadID
67	59	3875	0.11	0.17	24.22	GetThreadSlotValue
1346	3226	40	2.24	9.22	0.25	GetThreadStackUsage
Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	GetThreadStack2Usage
39	75	40	0.07	0.21	0.25	GetThreadStatus
15	13	10	0.03	0.04	0.06	GetTickPeriod
15	24	11	0.03	0.07	0.07	GetUptime
30	33	42	0.05	0.09	0.26	GetVersion
Not Applicable	Not Applicable	12	Not Applicable	Not Applicable	0.08	InstallMessageControlSemaphore
371	4982	2099	0.62	14.23	13.12	InstrumentStack
297	426	309	0.50	1.22	1.93	Load Event
197	306	261	0.33	0.87	1.63	LocateAndFreeBlock
16	12	15	0.03	0.03	0.09	LogHistoryEvent
117	174	117	0.20	0.50	0.73	MakePeriodic <no other periodic>
86	147	103	0.14	0.42	0.64	MallocBlock
396	456	225	0.66	1.30	1.41	Malloc (from C library, for comparison)
35	18	27	0.06	0.05	0.17	MessageAvailable
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	OpenDevice
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	PendDeviceFlag
72	97	47	0.12	0.28	0.29	PendEvent <no context switch>
210	292	350	0.35	0.83	2.19	PendEvent <with context switch>
170	194	169	0.28	0.55	1.06	PendMessage <no context switch>
277	406	411	0.46	1.16	2.57	PendMessage <with context switch>
79	118	56	0.13	0.34	0.35	PendSemaphore <available>
261	399	405	0.44	1.14	2.53	PendSemaphore <not available/no timeout>
310	477	434	0.52	1.36	2.71	PendSemaphore <not available, with timeout, no threads>
137	219	90	0.23	0.63	0.56	PopCriticalRegion <no reschedule>
121	173	97	0.20	0.49	0.61	PopNestedCriticalRegions <no reschedule>
114	166	86	0.19	0.47	0.54	PopNestedUnscheduledRegions <no reschedule>
114	176	81	0.19	0.50	0.51	PopUnscheduledRegion <no reschedule>
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	PostDeviceFlag
471	606	612	0.79	1.73	3.83	PostMessage <with context switch>
313	384	314	0.52	1.10	1.96	PostMessage <no context switch>
90	130	80	0.15	0.37	0.50	PostSemaphore <no thread pending>
176	222	193	0.29	0.63	1.21	PostSemaphore <low priority thread pending>
227	312	372	0.38	0.89	2.33	PostSemaphore <high priority thread pending>
57	111	22	0.10	0.32	0.14	PushCriticalRegion
34	39	11	0.06	0.11	0.07	PushUnscheduledRegion
66	Not Applicable	Not Applicable	0.11	Not Applicable	Not Applicable	ReleaseMutex <nested Release>
85	Not Applicable	Not Applicable	0.14	Not Applicable	Not Applicable	ReleaseMutex <no new owner>
215	Not Applicable	Not Applicable	0.36	Not Applicable	Not Applicable	ReleaseMutex <owner change, context switch>
89	130	98	0.15	0.37	0.61	RemovePeriodic <one periodic>
192	281	154	0.32	0.80	0.96	ResetPriority <no context switch>
421	596	473	0.70	1.70	2.96	ResetPriority <with context switch>
358	500	1383	0.60	1.43	8.64	SetClockFrequency
135	183	97	0.23	0.52	0.61	SetEventBit <no context switch>
657	895	684	1.10	2.56	4.28	SetEventBit <with context switch>
51	104	41	0.09	0.30	0.26	SetInterruptMaskBits
Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	SetInterruptMaskBitsEx
21	35	25	0.04	0.10	0.16	SetMessagePayload
275	426	256	0.46	1.22	1.60	SetPriority <no context switch>
302	476	434	0.50	1.36	2.71	SetPriority <with context switch>
21	28	20	0.04	0.08	0.13	SetThreadError
71	98	58	0.12	0.28	0.36	SetThreadSlotValue
301	509	1397	0.50	1.45	8.73	SetTickPeriod
240	371	372	0.40	1.06	2.33	Sleep <causing context switch>
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	SyncRead
Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	Device dept.	SyncWrite
94	97	85	0.16	0.28	0.53	Yield <no threads present>
212	276	295	0.35	0.79	1.84	Yield <threads present>
254	351	283	0.42	1.00	1.77	Yield <first entry to new thread>

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