My goal is to model a stream processor, with concurrent kernels running on different cores. The thread scheduling and load balancing is implemented at the hardware level. Our goal is to run some streaming applications on the simulator. We have to add in more components like stream buffers and invent some new instructions to manipulate streams. So I guess the goal is not that modest :)
But thanks all the same for this information. Good to know that I'm on the edge of M5 :) I'm willing to hear any suggestions. Thanks! Jiayuan -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Reinhardt Sent: Monday, May 21, 2007 9:52 PM To: M5 users mailing list Subject: Re: [m5-users] linux thread fork emulation? The SPLASH binaries were compiled natively on an Alpha Tru64 machine. I don't believe we've ever been successful in building a cross-compiler that generates Tru64 binaries. I would also be happy if there were other ways to emulate threads in SE mode for Linux binaries :-). Doing general pthreads support is very complex though, and not worth the effort (in my opinion) given that you can run them today in FS mode. If your goals are more modest, such as running SPLASH benchmarks, then the simplest path is to modify the implementations of the key PARMACS macros to use either existing Linux syscalls such as fork() or made-up syscalls you define yourself, then implement those syscalls in m5. Then you can enforce some constraints like that the number of threads never exceeds the number of CPUs, so you don't have to worry about scheduling. This is basically what the existing Tru64 SPLASH support does, only just for Tru64. This has been discussed before on the mailing list, so you might want to search for "pthreads" or "splash" in the mailing list archive and see what turns up. It's starting to sound like a good candidate for a wiki page even. Steve Jiayuan wrote: > Hey all, > > > > I'm trying to follow the splash2 example to create threads in SE mode. > However, I found that the crosstool only cross compiles code on linux, > while the precompiled splash2 uses tru64. While the system call for > creating thread is emulated for tru64, the system call is not emulated > for linux (in the source code, the system call associated with "fork" is > "unimplemented"). So, I wonder how the splash2 precompiled binary is > built. Are they built in a real environment? Or what crosscompiler is > available to compile code for tru64, so that I can use the implemented > emulation? > > > > I would also be happy if there are other ways to emulate threads in SE > mode with linux binary. > > > > Thanks! > > > > Jiayuan > > > ------------------------------------------------------------------------ > > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
