Buildbot Performance

[Christopher Nielsen]

Hmmm, perhaps I responded a bit too quickly, as there can be some performance benefit to pinning to a specific NUMA node (CPU socket). Particularly if our VMs were only running with only four vCPUs each.

So to qualify my statement: Given the configuration we’re running - VMs with eight vCPUs/each, along with significant CPU overcommitment - I wouldn’t recommend using pinning.

> On 2021-05-17-M, at 18:26, Christopher Nielsen <mascguy at rochester.rr.com> wrote:
> 
> We don’t want any type of pinning, as that will further exacerbate the situation.
> 
>> On 2021-05-17-M, at 18:24, Ryan Schmidt <ryandesign at macports.org> wrote:
>> 
>>> On May 17, 2021, at 13:13, Jason Liu wrote:
>>> 
>>> Regarding CPU overcommitment: Are the virtual hosts doing any sort of CPU pinning? Many virtualization products have the ability to specify which of the pCPU cores a guest is allowed to use. As far as I can remember, products like KVM and ESXi can do CPU pinning, while VirtualBox cannot.
>> 
>> Nope, nothing like that is set up. Is there any reason why we would want that?