Re: [PATCH 2/3] ci: do not use #processors+1 jobs, #processors is enough

[Paolo Bonzini]

On 18/05/21 14:43, Daniel P. Berrangé wrote:
> I'd be surprised if you can measure any statistically reliable difference
> at all wrt public CI. I've tried measuring CI performance for small changes
> and found it impossible in short time frames, as the deviation between runs
> is way too large. GitLab CI speeds tend to slow down as the day goes on and
> US wakes up, so by time you run QEMU CI a second time in the day, it will
> be slower. They clearly overcommit resources on the cloud host so you're
> at the mercy of whatever else is running.

Yeah, I was going to test it locally (using CPU offlining and hugetlbfs 
to simulate a 4-CPU machine with not that much memory).

Paolo