blocks|key|3294873|text|这是一个可能有用的图表，在左侧您可以看到解释：http://sdedit.sourceforge.net/multithreading/example/index.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3294874|​|3294875|📷|atomic|3294876|3294877|entityMap|0|LINK|mutability|MUTABLE|url|http://sdedit.sourceforge.net/multithreading/example/index.html|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ddc7bf14fe5a1efe59960ca43905e2b5.png|imageAlt^0|N|1R|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|I|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]|R|$5|S|N|T|C|$U|V|W|-4]]]]

Here is one diagram that may be useful, and on the left-hand side you can see the explanation:
<a href="http://sdedit.sourceforge.net/multithreading/example/index.html" rel="noreferrer">http://sdedit.sourceforge.net/multithreading/example/index.html</a>

<a href="https://i.stack.imgur.com/p5ebp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/p5ebp.png" alt="Multithreading Sequence Diagram"></a>

blocks|key|327262|text|我在谷歌上发现了这个问题，对公认的答案并不感兴趣，所以我就想出了我自己的答案。这就是我在应用程序中表示线程模型的方式(我的组织将其称为“并发视点”)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|327263|​|327264|📷|atomic|offset|length|327265|327266|希望这能帮助到某个人。|327267|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/4d607a19e207976bdc3b37701960e279.png|imageAlt^0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@$G|X|H|Y|1|Z]]|A|$]]|$1|I|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

I found this question on Google and wasn't a huge fan of the accepted answer so I just came up with my own. This is how I represented the threading model in my application (my organization calls it the 'Concurrency Viewpoint'):

<a href="https://i.stack.imgur.com/OWWHd.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OWWHd.png" alt="Concurrency viewpoint"></a>

Hopefully it helps someone.

blocks|key|3294953|text|这是sihaya的答案的副本，但详细说明了如何使用web上的工具和一个不会消失的可视化示例来实现它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3294954|UML序列图方法是使用"par“片段对并行处理的多个消息进行建模。下面是文本描述，当输入到web上可用的PlantUML工具中时，将生成下图。|offset|length|3294955|@startuml

Person+->+MicrowaveOven+:+Cook+Food
activate+MicrowaveOven
par
MicrowaveOven+->+MicrowaveOven+:+Activate+Magnetron
else
MicrowaveOven+->+MicrowaveOven+:+Activate+Rotation+Motor
end

MicrowaveOven+-->+Person+:+Delicious+Food
deactivate+MicrowaveOven

@enduml|code-block|syntax|javascript|3294956|​|3294957|📷|atomic|3294958|3294959|entityMap|0|LINK|mutability|MUTABLE|url|http://plantuml.com/sequence-diagram|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7c76e2d81140aa7c5f7b45f2b281cff1.png|imageAlt^0|0|1G|8|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|F|3|G|5|H|7|19|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|P|3|L|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|Z|U|10|A|$11|12|13|-4]]]]

This is a duplicate of sihaya's answer, but with details on how to accomplish it with tools on the web and a visual example that will not disappear.

The UML Sequence diagram approach is to use the "par" fragment to model multiple messages being processed in parallel. Below is a text description which when fed into the <a href="http://plantuml.com/sequence-diagram" rel="noreferrer">PlantUML</a> tool available on the web will produce the diagram below.

<pre><code>@startuml

Person -&gt; MicrowaveOven : Cook Food
activate MicrowaveOven
par
MicrowaveOven -&gt; MicrowaveOven : Activate Magnetron
else
MicrowaveOven -&gt; MicrowaveOven : Activate Rotation Motor
end

MicrowaveOven --&gt; Person : Delicious Food
deactivate MicrowaveOven

@enduml
</code></pre>

<a href="https://i.stack.imgur.com/sifrz.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sifrz.png" alt="par UML example"></a>

blocks|key|3294900|text|您可以使用"par“片段对并行执行的多个同步调用进行建模。该片段由一个标签为"par“的矩形组成。矩形被分成多个框，每个框代表一个执行线程。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3294901|下面是一个从链接中提取的示例。|3294902|​|3294903|📷|atomic|offset|length|3294904|3294905|此页面上提供了一个示例：http://www.ibm.com/developerworks/rational/library/3101.html#N10227|3294906|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/de2fc1390c5ca5c435989094e08b211f.png|imageAlt|1|LINK|MUTABLE|url|http://www.ibm.com/developerworks/rational/library/3101.html#N10227^0|0|0|0|0|1|0|0|0|C|1V|1|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|14|8|@]|9|@$I|15|J|16|1|17]]|A|$]]|$1|K|3|E|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@$I|1A|J|1B|1|1C]]|A|$]]|$1|N|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]|W|$5|X|R|Y|A|$Z|10]]]]

You can use a "par" fragment to model multiple synchronous calls being executed in parallel. The fragment consists of a rectangle with the label "par". The rectangle is divided into multiple boxes, each representing a thread of execution.

Below an example extracted from the link.

<a href="https://i.stack.imgur.com/mFhjG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mFhjG.png" alt="enter image description here"></a>

An example is given on this page:
<a href="http://www.ibm.com/developerworks/rational/library/3101.html#N10227" rel="nofollow noreferrer">http://www.ibm.com/developerworks/rational/library/3101.html#N10227</a>

blocks|key|329672|text|我喜欢@Brandon的回答。这张图显示了清晰的线程通信模型。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|329673|我还读到了这篇文档，其中有几种不同的https://www.omg.org/ocup-2/documents/concurrency_in_uml_version_2.6.pdf方法|offset|length|329674|entityMap|0|LINK|mutability|MUTABLE|url|https://www.omg.org/ocup-2/documents/concurrency_in_uml_version_2.6.pdf^0|0|I|1Z|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I like @Brandon's answer. That's a diagram that shows a clear threading communication model.

I also came across this document which has several different approaches <a href="https://www.omg.org/ocup-2/documents/concurrency_in_uml_version_2.6.pdf" rel="nofollow noreferrer">https://www.omg.org/ocup-2/documents/concurrency_in_uml_version_2.6.pdf</a>

blocks|key|3294883|text|您可能对Message+Sequence+Charts或MSC感兴趣。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3294884|Here是一张简单描述MSC的幻灯片。|3294885|entityMap|0|LINK|mutability|MUTABLE|url|http://www.sdl-forum.org/MSC/index.htm|1|http://www.sdl-forum.org/MSC2000present/sld003.htm^0|4|N|0|0|0|4|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

You may be interested in <a href="http://www.sdl-forum.org/MSC/index.htm" rel="nofollow noreferrer">Message Sequence Charts</a>, or MSC.

<a href="http://www.sdl-forum.org/MSC2000present/sld003.htm" rel="nofollow noreferrer">Here</a> is a slide describing MSC in a nutshell.

How can you clearly illustrate multiple threads of execution in a sequence diagram or similar diagram? 

I haven't been able to find any clear examples. All diagrams I see are used to illustrate a single thread.

<hr>

Update: The accepted answer was the best example I saw but it does leave a fair bit to be desired. I ended up illustrating the threads in separate sequence diagrams. I'm not sure if the sequence diagram necessarily works for multiple threads.

How to illustrate multiple threads in sequence diagram?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何在序列图或类似图中清楚地说明多个执行线程？我还没能找到任何明确的例子。我看到的所有图表都是用来说明单个线程的。更新：公认的答案是我见过的最好的例子，但它确实留下了一些需要改进的地方。最后，我在单独的序列图中说明了这些线索。我不确定序列图是否一定适用于多个线程。

问如何在序列图中展示多线程？
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回答 6

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