On Tue, 12 Dec 2023 at 18:46, BALATON Zoltan <bala...@eik.bme.hu> wrote: > > On Tue, 12 Dec 2023, Marek Glogowski wrote: > > Additionally, how can I use this message on qemu-devel. > > It has a post for people who use Macos or Asahi Linux. Verify random qemu > > sessions under Macos .Some are faster others are slow. > > The topic is posted on qemu-disc...@nongnu.org (I don't know if developers > > look there often) > > > > https://lists.nongnu.org/archive/html/qemu-discuss/2023-12/msg00008.html > > > > The program posted there was prepared by one of the maintainers of ppc qemu > > machines "BALATON Zoltan". > > > > We are starting to gather as much information as possible for it. > > I hope nobody will be offended about this information in this topic. I do > > not want to start a topic and litter other lists > > It's better to do that in a separate thead, I've changed the subject > accordingly. I only came up with the idea and scripted it but the actual > test case comes from Marek and the original report from Rene Engel. > > This problem was first seen running AmigaOS with qemu-system-ppc but then > we also reproduced it with Linux guest with the test in the qemu-discuss > messgage linked above. The runs are not exactly random but there seem to > be slow and fast sessions with the slow one about half the expected speed. > If we get a fast or slow session seems to be random. This was seen on > Apple M1 and Apple M1 Max under macOS but could not reproduce on x86_64 > host under Linux or Apple M2 host under Linux so it may either be related > to Apple M1 or macOS host.
Is this possibly related to https://gitlab.com/qemu-project/qemu/-/issues/334 where App Nap is reported as causing QEMU to slow down when the window doesn't have focus, or does it happen even when the QEMU window has focus the whole time the benchmark is running ? thanks -- PMM
