Thank for your answer. Beside nbench, I'm also using Dhrystone to measure the guest cpu performance. The performance does not much diffetence too. Is the emulated guest performance not depend on guest processor clock?
Tai ________________________________ Từ: Mulyadi Santosa <mulyadi.sant...@gmail.com> Đến: Lê Đức Tài <letai_d...@yahoo.com.vn> Cc: "qemu-devel@nongnu.orgDevelopers" <qemu-devel@nongnu.org> Gửi ngày: 17:27:20, Thứ Tư, 29 tháng 6 2011 Chủ đề: Re: [Qemu-devel] Qemu performance Hi... :) 2011/6/29 Lê Đức Tài <letai_d...@yahoo.com.vn>: > Hi, > I have a question about performance of Qemu for powerpc. > When I'm changing the CPU clock for taihu board from 33Mhz to 330Mhz by > setting the PLL value, the performance of Guest OS is not increased. I use > nbench to measure the guest performance. > Is qemu always running as maximum performance? Yes... Logically, nbench is just pressing out all of your processor can do (CPU bound tasks). In this case, emulated guest processor clock has very little meaning IMO. After all, AFAIK it's just a complimentary info so it is seen as "real processor". -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
