On Tue, Jan 28, 2020 at 7:30 PM Richard Henderson < richard.hender...@linaro.org> wrote:
> On 1/25/20 3:30 PM, Howard Spoelstra wrote: > > I noticed a considerable (~20%) slowdown in the cpu performance of > qemu-system-ppc. > > ENOINFO. > > For what test case? This should not have been on any hot path. > > Hi, I tested Mac OS 9.2 and 10.3/4 with qemu-system-ppc built from 4.2 and current master like this: Command line: ./qemu-system-ppc -L pc-bios -boot c -M mac99,via=pmu -m 512 \ -serial stdio -sdl \ -hda 9.2.img (10.3.img|10.4.img) Mac OS 9.2 MacBench 5.0 reports processor speed: 4.2: ~190% Master: ~160% Mac OSX 10.3.9 Skidmarks 4.0.1 test: specific drop in performance of MPEG(INT) test: 4.2: 118% Master: 100% Mac OS 10.4.11 Skidmarks 4.0.1 test: specific drop in performance of MPEG(INT) test: 4.2: 117% Master: 99% Best, Howard
