Hello all,
I met a error when running mesh topology:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/yuhang/gem5/src/python/m5/main.py", line 387, in main
exec filecode in scope
File "configs/example/se.py", line 209, in <module>
Ruby.create_system(options, system)
File "/home/yuhang/gem5/configs/ruby/Ruby.py", line 192, in create_system
assert(total_mem_size.value == phys_mem_size)
AssertionError
However, this error doesn't exist with mesh-rows=4 (16 cpus, dirs, and
l2caches), and mesh-rows=8 (64 cpus, dirs, and l2caches). All other
configurations I tried met this error.
I found this question exactly same as my problem:
http://comments.gmane.org/gmane.comp.emulators.m5.users/7791
I debugged Ruby.py, ran with 36 directories (mesh-rows=6) and get
total_mem_size.value= 536870880
phys_mem_size= 536870912
So there is a slight difference between these two value when the number
of directories are not 16 and 64, and thus raise the error.
This is how the codes in ruby.py get the value:
for dir_cntrl in dir_cntrls:
total_mem_size.value += dir_cntrl.directory.size.value
The physical memory size 536870912 is exactly 512M. A single
dir_cntrl.directory.size.value is 14913080, times 36, equals to
536870880. That's the total_mem_size.value
But I'm not quite understand the reason he explained. How can I solve
this problem? Could I just ignore the error and comment the assert line
"assert(total_mem_size.value == phys_mem_size)" in ruby.py?
Thanks,
Yuhang
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