gem5/cpu/profile.cc
Nathan Binkert b62e7d24ec clear the function profile on a stats reset
cpu/profile.hh:
    Add a placeholder for a reset callback

--HG--
extra : convert_revision : 7fa13e5d04daf1cf93eb35c8fdaf67a40ce3ef73
2005-11-20 18:33:17 -05:00

154 lines
4.5 KiB
C++

/*
* Copyright (c) 2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string>
#include "base/bitfield.hh"
#include "base/callback.hh"
#include "base/statistics.hh"
#include "base/trace.hh"
#include "cpu/base.hh"
#include "cpu/exec_context.hh"
#include "cpu/profile.hh"
using namespace std;
ProfileNode::ProfileNode()
: count(0)
{ }
void
ProfileNode::dump(const string &symbol, uint64_t id, const SymbolTable *symtab,
ostream &os) const
{
ccprintf(os, "%#x %s %d ", id, symbol, count);
ChildList::const_iterator i, end = children.end();
for (i = children.begin(); i != end; ++i) {
const ProfileNode *node = i->second;
ccprintf(os, "%#x ", (intptr_t)node);
}
ccprintf(os, "\n");
for (i = children.begin(); i != end; ++i) {
Addr addr = i->first;
string symbol;
if (addr == 1)
symbol = "user";
else if (addr == 2)
symbol = "console";
else if (addr == 3)
symbol = "unknown";
else if (!symtab->findSymbol(addr, symbol))
panic("could not find symbol for address %#x\n", addr);
const ProfileNode *node = i->second;
node->dump(symbol, (intptr_t)node, symtab, os);
}
}
void
ProfileNode::clear()
{
count = 0;
ChildList::iterator i, end = children.end();
for (i = children.begin(); i != end; ++i)
i->second->clear();
}
FunctionProfile::FunctionProfile(const SymbolTable *_symtab)
: reset(0), symtab(_symtab)
{
reset = new MakeCallback<FunctionProfile, &FunctionProfile::clear>(this);
Stats::registerResetCallback(reset);
}
FunctionProfile::~FunctionProfile()
{
if (reset)
delete reset;
}
ProfileNode *
FunctionProfile::consume(const vector<Addr> &stack)
{
ProfileNode *current = &top;
for (int i = 0, size = stack.size(); i < size; ++i) {
ProfileNode *&ptr = current->children[stack[size - i - 1]];
if (ptr == NULL)
ptr = new ProfileNode;
current = ptr;
}
return current;
}
void
FunctionProfile::clear()
{
top.clear();
pc_count.clear();
}
void
FunctionProfile::dump(ExecContext *xc, ostream &os) const
{
ccprintf(os, ">>>PC data\n");
map<Addr, Counter>::const_iterator i, end = pc_count.end();
for (i = pc_count.begin(); i != end; ++i) {
Addr pc = i->first;
Counter count = i->second;
std::string symbol;
if (pc == 1)
ccprintf(os, "user %d\n", count);
else if (symtab->findSymbol(pc, symbol) && !symbol.empty())
ccprintf(os, "%s %d\n", symbol, count);
else
ccprintf(os, "%#x %d\n", pc, count);
}
ccprintf(os, ">>>function data\n");
top.dump("top", 0, symtab, os);
}
void
FunctionProfile::sample(ProfileNode *node, Addr pc)
{
node->count++;
Addr symaddr;
if (symtab->findNearestAddr(pc, symaddr)) {
pc_count[symaddr]++;
} else {
// record PC even if we don't have a symbol to avoid
// silently biasing the histogram
pc_count[pc]++;
}
}