Jim Leek wrote:
So, I was never able to get the Solaris 10 install to work
with Simics 2.2, but my partner got it running on SImics 3.0, using the
serigenti install scripts included with simics. So, we've been working
with that. We spent tonight booting the installs with 1, 4, 8, and 16
processors and making checkpoints.
You should be aware that we have observed different paths of execution
between Simics 2.2.x and Simics 3.0.x, even with the same checkpoints.
If possible, you should use your bootable disk image to make
2.2.x-compatible checkpoints. Checkpoints aren't back-compatible, but
installed OS images are.
As I recall LogTM used the serengeti profile with 32
processors. However, you can't boot serengeti with that many
processors, because it only allows 6 boards with 4 CPUs each. To get
32, we had to change the serengeti_components.py file to allow more CPU
boards. Is this correct?
Serengeti machines can be configured with multiple chassis -- each
chassis sports 6 cpu boards and 2 io boards. To go beyond 32, we added
another chassis.
Another confusing thing to me, is that Ruby simulates a multi-core
system, so shouldn't it be 32 processors on 1 board? Or does ruby take
care of that somehow?
Simics has nothing whatsoever to do with timing. Under Simics alone,
CPUs that communicate across boards, chassis, etc. do so in unity time,
agnostic of how long it would take on the actual machine. Ruby enforces
the timings of whatever it wants to simulate on the flat timing
landscape provided with simics.
One last question, I was interested in the cholesky, barnes, and
radiosity microbenchmarks, but they don't seem to have any code
included. Where can I get that code?
(/microbenchmarks/transactional/cholesky/)
Those workloads are part of the SPLASH-2 workload suite, from Stanford.
Look here: http://www-flash.stanford.edu/apps/SPLASH/
Thanks,
Jim
Regards,
Dan
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