RFR: 6364: Improvements to the Thread Graph

[Suchita Chaturvedi]

On Tue, 15 Sep 2020 14:44:41 GMT, Alex Macdonald <aptmac at openjdk.org> wrote:

>> I also noticed that the overview mode indicates "too much content", for recording of applications having a high number
>> of threads. And when the display area is not big enough, e.g. on 13 inches laptop or when the thread table is expanded.
>>  
>> ![too much content on overview, thread table
>> expanded](https://user-images.githubusercontent.com/803621/91659801-7a0e2300-ead2-11ea-911b-ebf4e79d3228.png)
>> ![overview ok, external screen, thread table
>> hidden](https://user-images.githubusercontent.com/803621/91659799-72e71500-ead2-11ea-8ebf-7433031fae2b.png)
>> _Of course the application has a design issue (with this manyfold threads) but the point remain in my opinion._
>> 
>> The new view works great otherwise.
>> 
>> I'll be happy to sharemy private startup and continuous JFR files if needed. Here's those of JMC when I took these
>> snapshots. [startup-thread-view.zip](https://github.com/openjdk/jmc/files/5146861/startup-thread-view.zip)
>
> Hi @bric3! Thanks for taking a look at this PR and providing your feedback, the screenshots and jfr files you attached
> were also very much appreciated!
>> Hi, I noticed that when selecting a part of thread lane, like an event, then the cell/label is half dimed :
> 
> Good find, I'll poke around and see what I can do to get that to highlight the rest of the lane name.
> 
>> I also noticed that the overview mode indicates "too much content", for recording of applications having a high number
>> of threads. And when the display area is not big enough, e.g. on 13 inches laptop or when the thread table is expanded.
> 
> Thanks for finding this and sharing your jfr file too. I'll have to poke around with some different screen sizes and
> see what adjustments can be made here. The "too much content" overlay happens to the current threads page lanes under
> size restrictions, it looks like having the table above the chart causes it to reach this state a bit earlier than
> before.

"Edit Thread Lanes" at top right corner and "Thread State Selection" button, both are opening the same pop up.

Just a suggestion, Should we keep one and skip the other?

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PR: https://git.openjdk.java.net/jmc/pull/27