On Mon, 2023-12-18 at 22:27 +0000, Alex Bennée wrote: > "Richard Purdie" <[email protected]> writes: > > > On Mon, 2023-12-18 at 09:45 -0800, Khem Raj wrote: > > > I tried the two patches in this series. It did improve the situation > > > but I am still getting SSH timeouts. But this time its 13 tests > > > earlier it used to be 40+ > > > btw. my images are using systemd. So it might be good to see if we see > > > this with poky-altcfg as well or not. > > > > Do you have the log.do_testimage and the ${WORKDIR}/testimage/ files? > > > > Did you still see rcu stalls in the logs? > > rcu stalls in the kernel is just a sign of QEMU's relative inefficiency > compared to real HW. However multiple -smp will help alleviate busy > vCPUs if you can. If you want guest time to be a bit more realistic you > can use icount but actual wall clock time will be longer as you can only > have one thread.
We have thought that but I realised rcu stalls in the 8250 serial TX path could mean something quite different, related to 2/2 in this series. Cheers, Richard
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