I have seen previously discussion from the middle of March ([m5-users]
error running splash2 in beta 5, with followups on [m5-dev])
discussing the following error message:
Assertion `tags->findBlock(mshr->addr) == __null' failed.
Running full-system Alpha, I am able to get the error to occur with
the addition of two configuration likes the the configs/example/fs.py
as follows:
test_sys.physmem.latency = '10ns'
test_sys.l2.latency = '100ns'
Running the simulator with '-n 4 --caches --l2cache', no need to
specify a script, as it occurs even before reaching the prompt. This
is booting the kernel off the website along with tsb_osfpal compiled
from the alpha-system package. I am unable to get the error to occur
with only one core, though it does occur with two cores, though it did
not occur with eight.
I attempted commenting out the assertion, as previously mentioned. The
system is able to boot with four cores, but multithreaded workloads
have a tendency to get fatal errors (fatal within the simulated
machine, crashing only the program, not the simulated system).
I am also getting this error in a less asinine custom configuration,
where the speed difference between the cache and memory is small (40ns
and 50ns, respectively), though these settings did not cause it in the
example configuration.
I could not find any further responses that had indicated this issue
had been resolved, and was hoping someone would know something more.
Thanks,
- Clint Smullen
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