On Mon, Oct 19, 2020 at 11:22 AM Richard Henderson <richard.hender...@linaro.org> wrote: > > (1) What qemu version are you looking at and, > (2) Do you have --enable-tcg-debug enabled?
My use case is a large automated testing environment for large C++ binaries with heavy use of virtual dispatch. The binaries are generally not built at high optimization levels (-O0 or -O1), so it's not very surprising to me that indirect branches are more dominant in this as a workload My use case is currently using QEMU 4.0, but we will be moving to QEMU 4.2 soon. I do not have --enable-tcg-debug enabled. e979972a6a1 does look promising, and like it might deliver increased performance for our use case. It looks like the code in 4.0 is doing a lot more work gathering the flags values from a variety of places. --Owen
