Re: VGA emulation in BOCHS
"Stanislav" <[email protected]>
| Newsgroups | gmane.comp.emulators.bochs.devel |
|---|---|
| Message-ID | <[email protected]> |
Another option probably to keep CPU0 in the main thread, i.e. only open new threads for all other CPUs > 0 .... Stanislav -----Original Message----- From: Volker Ruppert [mailto:[email protected]] Sent: Friday, October 19, 2012 6:31 PM To: Xin Tong Cc: [email protected] Subject: Re: [Bochs-developers] VGA emulation in BOCHS Hi! > i am experimenting with parallelizing BOCHS. there are a few things i > have done to bring paraBOCHS to the current state. > > 1. put cpu in separate threads. > 2. make the code cache thread safety > 3. exclusively locked the page when atomic instructions are emulated. > 4. i am currently solving the x window problem. > > right now only the thread that is running BX_CPU(0) is calling the > currCountDown, but i still get assertion from the libX library. could > any other CPU thread be calling functions in libX at the same time if > they run truly in parallel ? When you did it correctly, only the cpu0 thread increments the timer tick. Then it checks if one of the timers has expired and if one did, it calls the associated timer handler. The other cpus should never call the timer code. The X11 gui code runs in the main thread and a timer call from the cpu0 thread could make it crash. You should have a look at the wx code and it's multi-threading implementation. The gui thread and the simulation thread use an event queue for the thread-safe communication. -- Thanks Volker ---------------------------------------------------------------------------- -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ bochs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/bochs-developers ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct