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
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