My architecture is an Interleaved Multithreading VLIW architecture. One bundle (packet) executes per processor cycle, rotating between threads (i.e., thread 0 executes at time 0, thread 1 executes at time 1, then thread 0 executes at time 2, etc.). Each thread has its own context (including a program counter). I'm not sure what kind of performance I would get in translating a single bundle at a time (or maybe I'm misunderstanding).
I think I'll get basic single-thread operation working first, then attempt multithreading when I have a spare month or so. Thanks, --Scott ----------------------------------------------------------- Qualcomm Inc. / Hexagon Tools Austin, TX sgibb...@qualcomm.com Office: 512-623-3831 Cell: 469-450-8390 -----Original Message----- From: Richard Henderson [mailto:rth7...@gmail.com] On Behalf Of Richard Henderson Sent: Thursday, June 17, 2010 11:03 AM To: Gibbons, Scott Cc: qemu-devel@nongnu.org Subject: Re: [Qemu-devel] VLIW? On 06/17/2010 08:12 AM, Gibbons, Scott wrote: > Another question I have is how to handle this multithreaded > architecture. This seems to be extraordinarily difficult as a > dynamic translation problem and I'll probably defer it to later. > But, if anyone has any suggestions, I'd be glad to hear them. How is your threading different from other SMP systems? In system mode, QEMU TCG is single-threaded and models SMP via cooperative switching in between TCG translation blocks. It's not ideal, but it does solve quite a number of problems and is at least functional. r~
