RTX 4.2 - Abstract

RTX 4.2 Report - Abstract

The RTX 4.2 report evaluates RTX 4.2, the Windows NT Real-Time Extension from VenturCom, Inc.
In order to clarify the content of the table of contents and the table of figures, the reader is referred to the document "Report definition and test plan".

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A. Abstract

B. Table of Contents

C. Table of Figures

A. Abstract

The RTX 4.2 report evaluates RTX 4.2 from VenturCom, Inc.
In order to clarify the content of the table of contents and the table of figures, the reader is referred to the document "Report definition and test plan".

B. Table of contents

		Page
1	Summary	5
1.1	Product	5
1.2	Positive points	5
1.3	Negative points	5
1.4	Ratings	5
1.5	Pricing	5
2	Introduction	6
2.1	Different steps in creating such evaluation report	6
2.2	Revision strategy	6
3	Technical evaluation	7
3.1	Installation and Configuration	7
3.1.1	Installation	7
3.1.2	Configuration	7
3.2	RTOS Architecture	8
3.2.1	System Architecture	8
3.2.2	Basic System Facilities	10
3.3	API Richness	13
3.3.1	POSIX	13
3.3.2	Task Management	13
3.3.3	Clock and Timer	14
3.3.4	Memory Management	15
3.3.5	Interrupt Handling	16
3.3.6	Synchronization and Exclusion Objects	16
3.3.7	Communication and Message Passing Objects	19
3.4	Internet Support	21
3.5	Tools	22
3.6	Documentation and Support	24
3.7	Development methodology	25
4	Practical evaluation	26
4.1	System under test	26
4.1.1	Operating system configuration	26
4.1.2	Test configuration	26
4.1.3	Additional comments	27
4.2	Interrupt handling - Without rescheduling	28
4.2.1	Interrupt latency (IL-a-1.a)	29
4.2.2	Interrupt dispatch latency (IDL-a-1.a)	30
4.3	Interrupt handling - Rescheduling	31
4.3.1	Interrupt dispatch latency (IDL-b-1.a)	32
4.3.2	Interrupt dispatch latency (IDL-b-10.a)	33
4.3.3	Interrupt dispatch latency (IDL-b-128.a)	34
4.4	Thread	35
4.4.1	Creation (TF-a-1.a)	36
4.4.2	Deletion - after use (TF-c-2.a)	37
4.5	Thread switch latency - same process	38
4.5.1	Thread switch latency - cache enabled (TSL-a-2.a)	39
4.5.2	Thread switch latency - cache disabled (TSL-a-2.a)	40
4.5.3	Thread switch latency - cache enabled (TSL-a-10.a)	41
4.5.4	Thread switch latency - cache disabled (TSL-a-10.a)	42
4.5.5	Thread switch latency - cache enabled (TSL-a-128.a)	43
4.5.6	Thread switch latency - cache disabled (TSL-a-128.a)	44
4.6	Thread switch latency - different processes	45
4.7	Counting semaphore	46
4.7.1	Creation (SEO-a-1.a)	47
4.7.2	Deletion (SEO-b-1.a)	48
4.7.3	Deletion - after use (SEO-c-1.a)	49
4.7.4	No contention - Acquire (SEO-d-1.a)	50
4.7.5	No contention - Release (SEO-e-1.a)	51
4.7.6	Synchronization (SEO-f-max.a)	52
4.7.7	Synchronization for RTX 4.1 (SEO-f-max.a)	54
4.7.8	Acquiring a semaphore that is not available	56
4.8	Binary semaphore	57
4.9	Mutex	58
4.9.1	No contention - Acquire (SEO-d-1.a)	59
4.9.2	No contention - Release (SEO-e-1.a)	60
4.9.3	No contention - Acquire - After switching from NT back to RTX (SEO-d-1.a)	61
4.9.4	Priority inversion (SEO-g-3.a)	62
4.10	File system - proprietary	63
5	License policy and pricing	64
6	Conclusions	65
7	References	67
8	Abbreviations	68

C. Table of figures

Figure 3.2-1:	Integration of RTX 4.2 into Windows NT 4.0	9
Figure 4.2-1	IL-a-1.a	29
Figure 4.2-2	IL-a-1.a - frequency distribution	29
Figure 4.2-3	IDL-a-1.a	30
Figure 4.2-4	IDL-a-1.a - frequency distribution	30
Figure 4.3-1	IDL-b-1.a	32
Figure 4.3-2	IDL-b-1.a - frequency distribution	32
Figure 4.3-3	IDL-b-10.a	33
Figure 4.3-4	IDL-b-10.a - frequency distribution	33
Figure 4.3-5	IDL-b-128.a	34
Figure 4.3-6	IDL-b-128.a - frequency distribution	34
Figure 4.4-1	TF-a-1.a	36
Figure 4.4-2	TF-a-1.a - frequency distribution	36
Figure 4.4-3	TF-c-2.a	37
Figure 4.4-4	TF-c-2.a - frequency distribution	37
Figure 4.5-1	TSL-a-2.a	39
Figure 4.5-2	TSL-a-2.a - frequency distribution	39
Figure 4.5-3	TSL-a-2.a - cache disabled	40
Figure 4.5-4	TSL-a-2.a - cache disabled - Exploded view	40
Figure 4.5-5	TSL-a-10.a	41
Figure 4.5-6	TSL-a-10.a - frequency distribution	41
Figure 4.5-7	TSL-a-10.a - cache disabled	42
Figure 4.5-8	TSL-a-10.a - frequency distribution - cache disabled	42
Figure 4.5-9	TSL-a-128.a	43
Figure 4.5-10	TSL-a-128.a - frequency distribution	43
Figure 4.5-11	TSL-a-128.a - cache disabled	44
Figure 4.5-12	TSL-a-128.a - frequency distribution - cache disabled	44
Figure 4.7-1	SEO-a-1.a	47
Figure 4.7-2	SEO-a-1.a - frequency distribution	47
Figure 4.7-3	SEO-b-1.a	48
Figure 4.7-4	SEO-b-1.a - frequency distribution	48
Figure 4.7-5	SEO-c-1.a	49
Figure 4.7-6	SEO-c-1.a - frequency distribution	49
Figure 4.7-7	SEO-d-1.a	50
Figure 4.7-8	SEO-d-1.a - frequency distribution	50
Figure 4.7-9	SEO-e-1.a	51
Figure 4.7-10	SEO-e-1.a - frequency distribution	51
Figure 4.7-11	SEO-f-max.a	52
Figure 4.7-12:	SEO-f-max.a - Exploded view	52
Figure 4.7-13	SEO-f-max.a - frequency distribution	53
Figure 4.7-14	SEO-f-max.a - RTX 4.1	54
Figure 4.7-15	SEO-f-max.a - Exploded view - RTX 4.1	54
Figure 4.7-16	SEO-f-max.a - frequency distribution - RTX 4.1	55
Figure 4.7-17	Acquiring a semaphore that is not available	56
Figure 4.7-18	Acquiring a semaphore that is not available - Exploded view	56
Figure 4.9-1	SEO-d-1.a	59
Figure 4.9-2	SEO-d-1.a - frequency distribution	59
Figure 4.9-3	SEO-e-1.a	60
Figure 4.9-4	SEO-e-1.a - frequency distribution	60
Figure 4.9-5	SEO-d-1.a - After switching from NT back to RTX	61
Figure 4.9-6	SEO-d-1.a - frequency distribution - After switching from NT back to RTX	61
Figure 4.9-7	SEO-g-3.a	62
Figure 4.9-8	SEO-g-3.a - frequency distribution	62

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