Hi Peter, Thanks for your suggestions! Will test some newer versions.
Best, Wenwen On Wed, Mar 8, 2017 at 2:42 PM, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 8 March 2017 at 18:17, Wenwen Wang <wenw...@cs.umn.edu> wrote: > > I just found that there is a significant performance difference between > QEMU > > version 2.2.0 and 2.6.0. > > > > Here are the execution times of the benchmark 458.sjeng from SPEC > CINT2006 > > with test workload using user only emulation from ARM guest to x86-32 > host: > > > > qemu-2.2.0: 29 seconds > > qemu-2.6.0: 38 seconds > > 2.6.0 is now quite old -- it would be interesting to test this on > the current git master. > > > Could anyone tell me what this difference comes from or give me any hint? > > There are lots of changes between those two releases, and we don't > in general track performance at all, so a regression is not very > surprising to me. If you wanted to try to identify what caused it > you could try a git bisect. > > thanks > -- PMM >
