Issue #16360 has been updated by jaruga (Jun Aruga).


> Hi jaruga (Jun Aruga) ReiOdaira (Rei Odaira)
> Unfortunately, s390x Travis CI fails too frequently.
> ...
> I think it is not your fault but maybe a network setting issue or something in Travis CI. 
But anyway, frequent failures make it difficult to keep trunk sound. Could you contact on Travis CI and fix the issue?

Hi mame (Yusuke Endoh).
Sure, I will take a look at the code, contact if it's needed and fix.

I think you can "s390x-linux" case to allow_failures in Travis at the moment as a temporary workflow. Then after making sure that the case is stable, we can remove it from allow_failures.


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Misc #16360: Enabling IBM PowerPC/Z cases in Travis CI
https://bugs.ruby-lang.org/issues/16360#change-83081

* Author: jaruga (Jun Aruga)
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
We added `arm64-linux` and `arm32-linux` cases to Travis CI by [the ticket](https://bugs.ruby-lang.org/issues/16234).
The `arm32-linux` case is going to be stable after [this pull-request](https://github.com/ruby/ruby/pull/2686) will be merged.

So, I would like to talk about this topic.
Currently Travis CI has following 4 multiple CPU architectures cases.

* `x86_64-linux` (Intel, 64-bit, Little-endian)
* `arm64-linux` (ARM, 64-bit, Little-endian)
* `i686-linux` (Intel, 32-bit, Little-endian)
* `arm32-linux` (ARM, 32-bit, Little-endian)

And a exciting news came from Travis CI this month.
Now Travis supports `arch: ppc64le` and `arch: s390x` as `arch: arm64` as well.

Build your open source projects on IBM Power and IBM Z CPU architecture
https://blog.travis-ci.com/2019-11-12-multi-cpu-architecture-ibm-power-ibm-z


So, how do you think about adding following 2 cases to Travis CI too?

* `ppc64le-linux` (IBM PowerPC, 64-bit, Little-endian)
* `s390x-linux` (IBM Z/Linux One, 64-bit, Big-endian)


## ppc64le, s390x use cases in Ruby project

* Searching tickets in Redmine, there were some architecture specific issues in the past.
* https://rubyci.org/ has s390x. But it seems it does not have ppc64le.
* s390x is a big-endian. It looks good to check the big-endian specific issue.


## ppc64le, s390x use cases in Linux distributions

For example Ubuntu is supporting ppc64le, s390x, providing the container image.

> https://hub.docker.com/_/ubuntu
> Supported architectures: (more info)
> amd64, arm32v7, arm64v8, i386, ppc64le, s390x

Fedora project is supporting ppc64le, s390x too.

> https://hub.docker.com/_/fedora
> Supported architectures: (more info)
> amd64, arm32v7, arm64v8, ppc64le, s390x

Are you interested in adding the ppc64le and s390x test cases to Travis CI?




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