Re: riscv64 system emulation maximum core count with virt machine

2021-10-05 Thread Mark Wyse
Thanks Rahul, After some digging I came to the same conclusions. I'll dig deeper to see if there are any impacts in raising max CPU count for RISC-V Virt machine, but I definitely agree that it should be set higher. FWIW, I was able to run a 32-core kernel after adjusting code and kernel appropri

Unpredictable performance degradation in QEMU KVMs

2021-10-05 Thread Parnell Springmeyer
Hi, we use QEMU VMs for running our integration testing infrastructure and have run into a very difficult to debug problem: occasionally we will see a severe performance degradation in some of our QEMU VMs. We've tried tuning our QEMU VMs (a long time ago) but we still have this issue. Is this som

Re: Unpredictable performance degradation in QEMU KVMs

2021-10-05 Thread Ken Moffat
On Tue, Oct 05, 2021 at 06:58:51PM -0500, Parnell Springmeyer wrote: > Hi, we use QEMU VMs for running our integration testing infrastructure and > have run into a very difficult to debug problem: occasionally we will see a > severe performance degradation in some of our QEMU VMs. > > We've tried