I see I see. So instead of creating a bigger TB that starts from the start of the TB to the particular I/O instruction, only a single TB would be created that contains only one instruction, which is the I/O instruction. Many thanks for letting me know.
Best Regards, Arnab On Sat, Mar 24, 2018 at 12:27 PM, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 23 March 2018 at 19:47, Arnabjyoti Kalita <akal...@cs.stonybrook.edu> > wrote: > > Hi Peter, > > > > Yes only I could see that. Sorry for dumping out incomplete logs :) > > > > Well I think I figured out the source of this representation of > repeating TB > > blocks. Your 3rd point in your previous answer was the solution. The fact > > that QEMU in TCG mode executes I/O instructions at the end of the > > translation block is causing these blocks to repeat. What helped me to > > figure this out was a recent patch in the QEMU source code. > > > > This is the patch : > > https://github.com/qemu/qemu/commit/0790f86861079b1932679d0f011e43 > 1aaf4ee9e2 > > Note that that patch turned out to be incorrect. There's a fix to it: > > https://lists.gnu.org/archive/html/qemu-devel/2018-03/msg04999.html > > which hasn't made it into git yet but should do in the not too > distant future. > > thanks > -- PMM >
