On Jan 3, 2017, at 3:59 AM, Gerd Hoffmann wrote: > On So, 2017-01-01 at 13:15 -0500, Programmingkid wrote: >> Hello, I was wondering if you would accept a patch that added a Speed >> menu to the GTK interface. This would allow the user to change how >> much CPU time the emulated CPU would see. > > /me wonders what exactly would the menu entries do? > > cheers, > Gerd
It is quite simple, there would be a 100% to a 1% menu item. It would look like this: Speed ------- 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 1% Each menu item would call cpu_throttle_set(). The value sent to this function would be determined like this: speed = -1 * menu_number + 100; speed would be sent to the cpu_throttle_set() function. This function would reduce the CPU usage of QEMU on the host. Why would someone want to slow down QEMU? - The user is using a laptop and don't want it to heat up. - The user wants to slow down a video game that is a little too challenging. - The user wants to save energy. - The user wants to conduct some kind of stress test on a program and see how it handles under low cpu resources. Hope this helps. Thank you for responding.
