ruby: Reduced ruby latencies

The previous slower ruby latencies created a mismatch between the faster M5
cpu models and the much slower ruby memory system.  Specifically smp
interrupts were much slower and infrequent, as well as cpus moving in and out
of spin locks.  The result was many cpus were idle for large periods of time.

These changes fix the latency mismatch.

configs/common/Options.py

@@ -34,7 +34,7 @@ parser.add_option("-n", "--num-cpus", type="int", default=1)
 parser.add_option("--caches", action="store_true")
 parser.add_option("--l2cache", action="store_true")
 parser.add_option("--fastmem", action="store_true")
-parser.add_option("--clock", action="store", type="string", default='1GHz')
+parser.add_option("--clock", action="store", type="string", default='2GHz')
 parser.add_option("--num-dirs", type="int", default=1)
 parser.add_option("--num-l2caches", type="int", default=1)
 parser.add_option("--num-l3caches", type="int", default=1)

configs/example/ruby_se.py

@@ -143,7 +143,7 @@ assert(options.timing)
 assert(test_mem_mode == 'timing')
 assert(FutureClass == None)
 
-CPUClass.clock = '1GHz'
+CPUClass.clock = options.clock
 
 np = options.num_cpus
 

configs/ruby/MOESI_CMP_token.py

@@ -36,13 +36,13 @@ from m5.defines import buildEnv
 # Note: the L1 Cache latency is only used by the sequencer on fast path hits
 #
 class L1Cache(RubyCache):
-    latency = 3
+    latency = 2
 
 #
 # Note: the L2 Cache latency is not currently used
 #
 class L2Cache(RubyCache):
-    latency = 15
+    latency = 10
 
 def define_options(parser):
     parser.add_option("--l1-retries", type="int", default=1,

configs/ruby/MOESI_hammer.py

@@ -35,13 +35,13 @@ from m5.defines import buildEnv
 # Note: the L1 Cache latency is only used by the sequencer on fast path hits
 #
 class L1Cache(RubyCache):
-    latency = 3
+    latency = 2
 
 #
 # Note: the L2 Cache latency is not currently used
 #
 class L2Cache(RubyCache):
-    latency = 15
+    latency = 10
 
 def define_options(parser):
     return

src/mem/protocol/MOESI_CMP_token-L1cache.sm

@@ -41,7 +41,7 @@ machine(L1Cache, "Token protocol")
    int l1_request_latency = 2,
    int l1_response_latency = 2,
    int retry_threshold = 1,
-   int fixed_timeout_latency = 300,
+   int fixed_timeout_latency = 100,
    bool dynamic_timeout_enabled = true
 {
 

src/mem/protocol/MOESI_CMP_token-L2cache.sm

@@ -35,8 +35,8 @@
 machine(L2Cache, "Token protocol") 
  : CacheMemory * L2cacheMemory,
    int N_tokens,
-   int l2_request_latency = 10,
-   int l2_response_latency = 10,
+   int l2_request_latency = 5,
+   int l2_response_latency = 5,
    bool filtering_enabled = true
 {
 

src/mem/protocol/MOESI_CMP_token-dir.sm

@@ -36,9 +36,9 @@ machine(Directory, "Token protocol")
  : DirectoryMemory * directory,
    MemoryControl * memBuffer,
    int l2_select_num_bits,
-   int directory_latency = 6,
+   int directory_latency = 5,
    bool distributed_persistent = true,
-   int fixed_timeout_latency = 300
+   int fixed_timeout_latency = 100
 {
 
   MessageBuffer dmaResponseFromDir, network="To", virtual_network="5", ordered="true";

src/mem/protocol/MOESI_hammer-cache.sm

@@ -38,7 +38,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
   CacheMemory * L1IcacheMemory,
   CacheMemory * L1DcacheMemory,
   CacheMemory * L2cacheMemory,
-  int cache_response_latency = 12,
+  int cache_response_latency = 10,
   int issue_latency = 2
 {
 

src/mem/protocol/MOESI_hammer-dir.sm

@@ -36,7 +36,7 @@
 machine(Directory, "AMD Hammer-like protocol") 
 : DirectoryMemory * directory,
   MemoryControl * memBuffer,
-  int memory_controller_latency = 12
+  int memory_controller_latency = 2
 {
 
   MessageBuffer forwardFromDir, network="To", virtual_network="3", ordered="false";