Commit 68e3d38a authored by Rémy Coutable's avatar Rémy Coutable

Merge branch 'doc-for-pipeline-duration' into 'master'

Add doc for pipeline duration

The description was copied and modified from !6084

See merge request !6445
parents 49ed235d 7b664858
......@@ -36,6 +36,37 @@ Clicking on a pipeline will show the builds that were run for that pipeline.
Clicking on an individual build will show you its build trace, and allow you to
cancel the build, retry it, or erase the build trace.
## How the pipeline duration is calculated
Total running time for a given pipeline would exclude retries and pending
(queue) time. We could reduce this problem down to finding the union of
periods.
So each job would be represented as a `Period`, which consists of
`Period#first` as when the job started and `Period#last` as when the
job was finished. A simple example here would be:
* A (1, 3)
* B (2, 4)
* C (6, 7)
Here A begins from 1, and ends to 3. B begins from 2, and ends to 4.
C begins from 6, and ends to 7. Visually it could be viewed as:
```
0 1 2 3 4 5 6 7
AAAAAAA
BBBBBBB
CCCC
```
The union of A, B, and C would be (1, 4) and (6, 7), therefore the
total running time should be:
```
(4 - 1) + (7 - 6) => 4
```
## Badges
Build status and test coverage report badges are available. You can find their
......
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