So, my three yearly upgrade time came around and now I have a new laptop with a Raptor Lake i7-13800H CPU, or in other words, a CPU with 6 Performance cores and 8 Efficiency cores. The P-cores use Hyper-Threading so the six of them gives 12 threads and the 8 E-cores bring the total number of threads up to 20. As I do a lot of work in virtual machines (with VMWare Workstation for Linux), I was very much looking forward to seeing this new machine run two heavily loaded VMs without breaking a sweat.
It's fast, there's no denying it and there's lots of room for VMs as well with 64GB of DDR5 DRAM. But...
Here's a snap of my conky monitoring screen while the two VMs are working hard - one updating Windows and the other updating Visual Studo.
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This just doesn't look right to me. The scheduler seems to have something against the even numbered P-core threads and is not making much use of them. In VMWare, one machine is configured as having two CPUs, each with two cores and on the other, it is configured to have two CPUs with four cores each. A grand total of 12 cores configured for both VMs.
I'm running a fully up to date installation of Debian bookworm. I've had a look around about how well bookworm uses these mixed core CPUs out of the box, but didn't come away from that feeling particularly enlightened. So I wondered if anyone here is using a similar configuration and what your experience is? Does anyone have any tips and tricks that would help me achieve better performance from this machine?
It's fast, there's no denying it and there's lots of room for VMs as well with 64GB of DDR5 DRAM. But...
Here's a snap of my conky monitoring screen while the two VMs are working hard - one updating Windows and the other updating Visual Studo.
This just doesn't look right to me. The scheduler seems to have something against the even numbered P-core threads and is not making much use of them. In VMWare, one machine is configured as having two CPUs, each with two cores and on the other, it is configured to have two CPUs with four cores each. A grand total of 12 cores configured for both VMs.
I'm running a fully up to date installation of Debian bookworm. I've had a look around about how well bookworm uses these mixed core CPUs out of the box, but didn't come away from that feeling particularly enlightened. So I wondered if anyone here is using a similar configuration and what your experience is? Does anyone have any tips and tricks that would help me achieve better performance from this machine?
Statistics: Posted by grizewald — 2024-01-23 19:05 — Replies 1 — Views 27