ruby: check for compatibility between mem size and num dirs

The configuration scripts provided for ruby assume that the available
physical memory is equally distributed amongst the directory controllers.
But there is no check to ensure this assumption has been adhered to. This
patch adds the required check.

configs/ruby/MESI_CMP_directory.py

@@ -142,6 +142,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     # Run each of the ruby memory controllers at a ratio of the frequency of

configs/ruby/MI_example.py

@@ -107,6 +107,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     # Run each of the ruby memory controllers at a ratio of the frequency of

configs/ruby/MOESI_CMP_directory.py

@@ -137,6 +137,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     # Run each of the ruby memory controllers at a ratio of the frequency of

configs/ruby/MOESI_CMP_token.py

@@ -158,6 +158,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     # Run each of the ruby memory controllers at a ratio of the frequency of

configs/ruby/MOESI_hammer.py

@@ -133,6 +133,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     #

configs/ruby/Network_test.py

@@ -105,6 +105,7 @@ def create_system(options, system, piobus, dma_ports, ruby_system):
 
     phys_mem_size = sum(map(lambda mem: mem.range.size(),
                             system.memories.unproxy(system)))
+    assert(phys_mem_size % options.num_dirs == 0)
     mem_module_size = phys_mem_size / options.num_dirs
 
     # Run each of the ruby memory controllers at a ratio of the frequency of