Hi Jim, I think Alex and Paolo worked on an mttcg/icount issue. Not sure if its related or not.
Fred On 03/03/2017 08:38 PM, Nutaro, James J. wrote: > My original problem seems to stem from something that changed in the way that > device emulation and instruction execution interact (I'm guessing). To > reproduce the issue, I started a linux image with > > qemu-system-i386 -rtc clock=vm -monitor none -icount 1,sleep=off jack.img > > After booting, I run > > ping localhost > > The first round trip time reports look reasonable, being in the millisecond > to sub-millisecond range. These occur while the emulator is running slower > than real time. > > After a bit, the emulator speeds up (skipping over idle periods during I/O?) > and the round trip times jump to hundreds of milliseconds, which I had not > expected. > > If you want to try this experiment yourself, you can get the disk image that > I used from here: > > http://www.ornl.gov/~1qn/qemu-images/jack.img > > > Jim >
