Thursday, 9 December 2021

Re: Bumping the baseline on ppc64el in jammy to POWER9

Ok, so like mentioned in MM, the interim solution is to provide you one system from the PowerMAAS pool (with sufficient) resources.
And once we got more P9 loaners, one of these will be delegated to you/Server-team for ISO testing.

Next steps:
- I'll identify one system
- will check the network connectivity, if it's possible to reach 10.25.200.31 (what is probably not the case)
- if it's not possible I'll open an RT and ask for routing adjustments

I'll keep you in the loop ... (probably '-' ubuntu-devel then, to not spam others too much ...)

Frank


On Thu, Dec 9, 2021 at 3:40 PM Matthias Klose <doko@ubuntu.com> wrote:
On 12/9/21 15:24, Christian Ehrhardt wrote:
> On Thu, Dec 9, 2021 at 2:25 PM Matthias Klose <doko@ubuntu.com> wrote:
>>
>> This weekend, we will bump the baseline for the ppc64el architecture to POWER9.
>> A test compiler (gcc-11) for jammy can be found at
>>
>>   https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/p9
>>
>> We will not do an explicit test rebuild for that change, but do the first test
>> rebuild during the Xmas/New Year breaks with this p9 default.  If bugs are found
>> with these defaults,
>>
>>  - fix the bug if possible
>>
>>  - file a bug report with the tag "power9"
>>
>>  - if a fix is urgently needed, file the bug report as
>>    above, and then upload the package with a workaround
>>    defaulting to the previous baseline:
>>
>>      -march=power8 -mtune=power9
>
> Hi Doko,
> to understand this right, the new will be -march=power9 then?
>
> If yes, that implies that any power8 test machine won't be usable for >=jammy.
> I just wanted to spell this out so that the implication is clear since
> I think while
> P8 machines are old they are in common use as test system AFAIK.

yes, that's correct.

Matthias

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