> On Oct 19, 2015, at 4:37 AM, Peter Maydell <peter.mayd...@linaro.org> wrote: > > On 18 October 2015 at 20:46, Peter Maydell <peter.mayd...@linaro.org> wrote: >> On 16 October 2015 at 08:32, Aaron Elkins <threc...@yahoo.com> wrote: >>> I built Qemu on Mac OS X 10.11 El Capitan with: >>> >>> ./configure >>> make >>> make install >>> >>> Successfully. >>> >>> And downloaded the official linux image, and ran it with the following: >>> >>> qemu-system-x86_64 -drive >>> file=linux-0.2.img,index=0,media=disk,format=raw >>> >>> And then got the following warnings and the guest linux can not response to >>> keyboard and freezes for a period of time, and this issue repeated forever >>> while the guest linux was running. >>> >>> main-loop: WARNING: I/O thread spun for 1000 iterations >>> >>> Any idea? >> >> I've been able to reproduce this on my Yosemite system (only >> with debugging disabled, annoyingly.) Not sure why it's doing >> it yet, though... >> >> (Note to Paolo: if I disable the 'suppress second notifications' >> code it prints the warning forever.) > > Sometimes it does manage to unwedge itself. Paolo, do you have > any suggestions for how to debug this kind of issue? Backtraces > and some debug printfs seem to indicate that the TCG CPU thread is sat in > qemu_tcg_wait_io_event() until the main loop hits its "spun too > much" check, and then the unlock-lock causes us to get out of the > cond-wait, but then we get stuck again. > > thanks > -- PMM
I testes this issue in older version of QEMU, and in version 1.5, the warning message disappeared, but the lagging remained. I am looking to a solution to this issue for a few days, but still get no progress. -Aaron
