From 2e079ce038dcce2c5328d840f8b57290bef8c794 Mon Sep 17 00:00:00 2001
From: Vilas Sridharan <vilas.sridharan@gmail.com>
Date: Fri, 22 Feb 2008 17:48:10 -0500
Subject: add instruction count fast forwaing and max instruction options

--HG--
extra : convert_revision : 8fe45e512229cdc3e0dcd23e3e5c54516c445d0f
---
 configs/common/Simulation.py | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

(limited to 'configs/common/Simulation.py')

diff --git a/configs/common/Simulation.py b/configs/common/Simulation.py
index cea391c5d..f6b289fb5 100644
--- a/configs/common/Simulation.py
+++ b/configs/common/Simulation.py
@@ -95,6 +95,9 @@ def run(options, root, testsys, cpu_class):
         switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
 
     if options.standard_switch:
+        if (options.fast_forward and options.warmup):
+            m5.panic("Must specify either warmup OR fast-forward with -s!")
+
         switch_cpus = [TimingSimpleCPU(defer_registration=True, cpu_id=(np+i))
                        for i in xrange(np)]
         switch_cpus_1 = [DerivO3CPU(defer_registration=True, cpu_id=(2*np+i))
@@ -109,6 +112,11 @@ def run(options, root, testsys, cpu_class):
             switch_cpus[i].clock = testsys.cpu[0].clock
             switch_cpus_1[i].clock = testsys.cpu[0].clock
 
+            if options.fast_forward:
+                switch_cpus[i].max_insts_any_thread = options.fast_forward
+            if options.max_inst:
+                switch_cpus_1[i].max_insts_any_thread = options.max_inst
+
             if not options.caches:
                 # O3 CPU must have a cache to work.
                 switch_cpus_1[i].addPrivateSplitL1Caches(L1Cache(size = '32kB'),
@@ -121,6 +129,10 @@ def run(options, root, testsys, cpu_class):
             switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
             switch_cpu_list1 = [(switch_cpus[i], switch_cpus_1[i]) for i in xrange(np)]
 
+    elif options.fast_forward:
+        for i in xrange(np):
+            testsys.cpu[i].max_insts_any_thread = options.fast_forward
+
     m5.instantiate(root)
 
     if options.checkpoint_restore:
@@ -167,11 +179,32 @@ def run(options, root, testsys, cpu_class):
         m5.resume(testsys)
 
         if options.standard_switch:
-            exit_event = m5.simulate(options.warmup)
+            if (options.warmup):
+                exit_event = m5.simulate(options.warmup)
+            if options.fast_forward:
+                exit_event = m5.simulate()
             m5.drain(testsys)
             m5.switchCpus(switch_cpu_list1)
             m5.resume(testsys)
 
+    # This should *only* be used by itself to take a checkpoint!
+    # Otherwise, use standard_switch
+    elif options.fast_forward:
+        exit_event = m5.simulate()
+
+        while exit_event.getCause() != "a thread reached the max instruction count":
+            if exit_event.getCause() == "user interrupt received":
+                print "User interrupt! Switching to simulation mode"
+                break
+            else:
+                m5.simulate(True)
+
+        if exit_event.getCause() == "a thread reached the max instruction count":
+            print "Reached fast_forward count %d; starting simulation at cycle %d" % (options.fast_forward, m5.curTick())
+
+        m5.checkpoint(root, joinpath(cptdir, "cpt.%d"))
+        return
+
     num_checkpoints = 0
     exit_cause = ''
 
-- 
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