Add the ability to track stats in user defined sets of function calls. code can be generated via the base/instrum_codegen.pl script to easily change the functions being tracked. the only thing the user needs to do is add code in tru64System to change how the callerMap is populated.

command line:

m5.* <config file> <args> --server.system:bin=true to track function calls in the server
m5.* <config file> <args> --client.system:bin=true to track function calls in the client

base/statistics.cc:
    make an adjustment to the way stats are printed for FS_MEASURE
base/statistics.hh:
    add a name() virtual function to GenBin.  add a debug printf for activate().
    add amake MainBin the default bin when FS_MEASURE.
cpu/exec_context.cc:
    initialize swCtx to null upon creation of an xc
cpu/exec_context.hh:
    add a SWContext pointer to every execution context.
cpu/simple_cpu/simple_cpu.cc:
    process calls and returns for FS_MEASURE
cpu/simple_cpu/simple_cpu.hh:
    add this so idleCycles will not be accessed before all stats are constructed
kern/tru64/tru64_events.cc:
    add a FnEvent that fires whenever a function we're tracking is called.  implement the process() virtual function for it.
kern/tru64/tru64_events.hh:
    add FnEvent
kern/tru64/tru64_system.cc:
    send bin parameter to System constructor.  add bin parameter to Tru64System object.  initialize all the FnEvent and MainBin members of Tru64system.  also, populate the calling map that indicates whether a function call is on the path we're tracking.
kern/tru64/tru64_system.hh:
    modify the Tru64System class to support FS_MEASURE
sim/system.cc:
    add a bin parameter to System class.  initialize a MainBin to hold the stats for nonPath.
sim/system.hh:
    add a map of to match bins to function names.  add a swCtx map to map pcb addresses to SWContext *s.  Add some supporting functions.

--HG--
extra : convert_revision : af3eadd798cb2d2aed9b54e1059dcedf244dd526

2 files changed, 27 insertions, 2 deletions

diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 60d704604..814902390 100644
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -627,7 +627,32 @@ SimpleCPU::tick()
         xc->func_exe_insn++;
 
         fault = si->execute(this, xc, traceData);
-
+#ifdef FS_MEASURE
+        if (!(xc->misspeculating()) && (xc->system->bin)) {
+            SWContext *ctx = xc->swCtx;
+            if (ctx && !ctx->callStack.empty()) {
+                if (si->isCall()) {
+                    ctx->calls++;
+                }
+                if (si->isReturn()) {
+                     if (ctx->calls == 0) {
+                        fnCall *top = ctx->callStack.top();
+                        DPRINTF(TCPIP, "Removing %s from callstack.\n", top->name);
+                        delete top;
+                        ctx->callStack.pop();
+                        if (ctx->callStack.empty())
+                            xc->system->nonPath->activate();
+                        else
+                            ctx->callStack.top()->myBin->activate();
+
+                        xc->system->dumpState(xc);
+                    } else {
+                        ctx->calls--;
+                    }
+                }
+            }
+        }
+#endif
         if (si->isMemRef()) {
             numMemRefs++;
         }
diff --git a/cpu/simple_cpu/simple_cpu.hh b/cpu/simple_cpu/simple_cpu.hh
index 61c9143ba..6ad831218 100644
--- a/cpu/simple_cpu/simple_cpu.hh
+++ b/cpu/simple_cpu/simple_cpu.hh
@@ -216,7 +216,7 @@ class SimpleCPU : public BaseCPU
             assert(old_status == Idle ||
                    old_status == DcacheMissStall ||
                    old_status == IcacheMissComplete);
-            if (old_status == Idle)
+            if (old_status == Idle && curTick != 0)
                 idleCycles += curTick - last_idle;
 
             if (tickEvent.squashed())