Support trace view as a flame graph

[hehe717]

I am implementing jaeger, it really looks nice.
But I got a problem.
I want to collect spans on one line in tracing view, but I cannot find way.

[As-IS]

[To-Be]

Maybe I can't find the doc... could you help ?

[yurishkuro]

The flame-graph kind of view is not supported in Jaeger.

[yurishkuro]

The challenge with this type of view is that sibling spans are not guaranteed to not overlap, so how should they be displayed in that case?

|----------------parent---------------|
    |---child1---|
                |---child2---|

[hehe717]

Yes.. I didn't think that part.

Datadog's tracing view can be hint for this problem. (they have implemented flame graph with open tracing )
https://docs.datadoghq.com/tracing/visualization/trace/?tab=spantags

And, Overlapped graph can be great help to developer if developer set kinds of order spans by operationName

[yurishkuro]

DD docs don't explain how the they deal with overlapping siblings, unless I missed it

[hehe717]

Right , closed this issue because of the challenge of sibling spans does not guarantee to not overlap

[n1ckdm]

I think this issue should be reopened. Flamegraph support for jaeger would be really useful for some of the systems I'm working with.

This tool takes a JSON dump from jaeger and converts it to be read by FlameGraph:

https://github.com/symbiont-io/jaeger-flamegraph

Might be some clues there for how to handle the overlapping siblings?

I'd be interested in working on a PR for this if there's appetite for it?

[ColinBradley]

FWIW, I'd really like this feature too.
Datadog and Raygun both have flame graph esk views and they are incredibly helpful.

The sibling overlapping issue is a small edge case you can handle by just putting them on different rows. It's fine - parallel work is just messy.

Basically the entire logic is that spans should go on a new row if there is no room on a preceding row and never going higher than a parent. I've made and used a basic viewer like this in the past and it worked great.

[h1z3y3]

+1

[novohool]

+2