Hey all,
Anyone familiar with the state of Raptor Lake performance + efficiency cores in Linux? I’m specifically curious about how the kernel balances things when running multiple containers (without pinned CPUs)
Thanks!
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A Docker container is a security framework. The process running “inside” the container is just a Linux process like any other.
So, as I understand it, the performance will be identical to a process that is running “outside” a container, subject to the overhead associated with any security restrictions.
If you want to protect the system from untrusted software with containers be careful. Containers and images are mostly an abstraction tool to run and control the applications. Not saying it’s not possible, it’s just easy to make it insecure.
Yes, this is the case, I’m more wondering about kernel support for CPU assignment as it relates to those processes.
I think that what you’re looking for is “CPU affinity”, but that is not something I know anything about.
In the 40+ years I’ve been playing with computers, I’ve always let the OS worry about where and when to run a process and only rarely do I
renicea process that needs to run, but not at the expense of everything else.Agreed, just want to make sure the kernel can handle resourcing for two different types of cores. I know there was a time (recent) where it couldn’t. Others have said 6.x is the key.
Looks like if you’re on kernel 6.0+ you’re handled according to how Intel intended to deal with it. What’s your specific concern?
OK, looks like Debian stable is 6.1 https://tracker.debian.org/pkg/linux
My main concern is will it balance cores appropriately. IE if a Postgres DB is humming along, assign an efficient core, but if it ramps up, use the higher powered ones.
Looks like you’d have to manually assign cpus by with --cpuset-cpus
What makes you say that?
A quick look at docker docs says it’s the only way. Same with any other way of running a program/service, you have to manually set an affinity of an executable
No you don’t? There’s nothing with Docker that forces you to pin.
