gem5/kern/kernel_stats.cc

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/*
* Copyright (c) 2003 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 <map>
#include <stack>
#include <string>
#include "base/statistics.hh"
#include "base/trace.hh"
#include "cpu/exec_context.hh"
#include "kern/kernel_stats.hh"
#include "sim/stats.hh"
#include "sim/sw_context.hh"
#include "targetarch/isa_traits.hh"
#include "targetarch/osfpal.hh"
#include "targetarch/syscalls.hh"
using namespace std;
using namespace Stats;
class KSData
{
private:
string _name;
ExecContext *xc;
BaseCPU *cpu;
public:
KSData(ExecContext *_xc, BaseCPU *_cpu)
: xc(_xc), cpu(_cpu), iplLast(0), iplLastTick(0), lastUser(false),
lastModeTick(0)
{}
const string &name() { return _name; }
void regStats(const string &name);
public:
Scalar<> _arm;
Scalar<> _quiesce;
Scalar<> _ivlb;
Scalar<> _ivle;
Scalar<> _hwrei;
Vector<> _iplCount;
Vector<> _iplGood;
Vector<> _iplTicks;
Formula _iplUsed;
Vector<> _callpal;
Vector<> _syscall;
Vector<> _faults;
Vector<> _mode;
Vector<> _modeGood;
Formula _modeFraction;
Vector<> _modeTicks;
Scalar<> _swap_context;
private:
int iplLast;
Tick iplLastTick;
bool lastUser;
Tick lastModeTick;
public:
void swpipl(int ipl);
void mode(bool user);
void callpal(int code);
};
KernelStats::KernelStats(ExecContext *xc, BaseCPU *cpu)
{ data = new KSData(xc, cpu); }
KernelStats::~KernelStats()
{ delete data; }
void
KernelStats::regStats(const string &name)
{ data->regStats(name); }
void
KSData::regStats(const string &name)
{
_name = name;
_arm
.name(name + ".inst.arm")
.desc("number of arm instructions executed")
;
_quiesce
.name(name + ".inst.quiesce")
.desc("number of quiesce instructions executed")
;
_ivlb
.name(name + ".inst.ivlb")
.desc("number of ivlb instructions executed")
;
_ivle
.name(name + ".inst.ivle")
.desc("number of ivle instructions executed")
;
_hwrei
.name(name + ".inst.hwrei")
.desc("number of hwrei instructions executed")
;
_iplCount
.init(32)
.name(name + ".ipl_count")
.desc("number of times we switched to this ipl")
.flags(total | pdf | nozero | nonan)
;
_iplGood
.init(32)
.name(name + ".ipl_good")
.desc("number of times we switched to this ipl from a different ipl")
.flags(total | pdf | nozero | nonan)
;
_iplTicks
.init(32)
.name(name + ".ipl_ticks")
.desc("number of cycles we spent at this ipl")
.flags(total | pdf | nozero | nonan)
;
_iplUsed
.name(name + ".ipl_used")
.desc("fraction of swpipl calls that actually changed the ipl")
.flags(total | nozero | nonan)
;
_iplUsed = _iplGood / _iplCount;
_callpal
.init(256)
.name(name + ".callpal")
.desc("number of callpals executed")
.flags(total | pdf | nozero | nonan)
;
for (int i = 0; i < PAL::NumCodes; ++i) {
const char *str = PAL::name(i);
if (str)
_callpal.subname(i, str);
}
_syscall
.init(SystemCalls<Tru64>::Number)
.name(name + ".syscall")
.desc("number of syscalls executed")
.flags(total | pdf | nozero | nonan)
;
for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
const char *str = SystemCalls<Tru64>::name(i);
if (str) {
_syscall.subname(i, str);
}
}
_faults
.init(Num_Faults)
.name(name + ".faults")
.desc("number of faults")
.flags(total | pdf | nozero | nonan)
;
for (int i = 1; i < Num_Faults; ++i) {
const char *str = FaultName(i);
if (str)
_faults.subname(i, str);
}
_mode
.init(2)
.name(name + ".mode_switch")
.subname(0, "kernel")
.subname(1, "user")
.desc("number of protection mode switches")
;
_modeGood
.init(2)
;
_modeFraction
.name(name + ".mode_switch_good")
.subname(0, "kernel")
.subname(1, "user")
.desc("fraction of useful protection mode switches")
.flags(total)
;
_modeFraction = _modeGood / _mode;
_modeTicks
.init(2)
.name(name + ".mode_ticks")
.subname(0, "kernel")
.subname(1, "user")
.desc("number of ticks spent at the given mode")
.flags(pdf)
;
_swap_context
.name(name + ".swap_context")
.desc("number of times the context was actually changed")
;
}
void
KernelStats::arm()
{ data->_arm++; }
void
KernelStats::quiesce()
{ data->_quiesce++; }
void
KernelStats::ivlb()
{ data->_ivlb++; }
void
KernelStats::ivle()
{ data->_ivle++; }
void
KernelStats::hwrei()
{ data->_hwrei++; }
void
KernelStats::fault(Fault fault)
{ data->_faults[fault]++; }
void
KernelStats::swpipl(int ipl)
{ data->swpipl(ipl); }
void
KernelStats::mode(bool user)
{ data->mode(user); }
void
KernelStats::context(Addr old_pcbb, Addr new_pcbb)
{ data->_swap_context++; }
void
KernelStats::callpal(int code)
{ data->callpal(code); }
void
KSData::swpipl(int ipl)
{
assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
_iplCount[ipl]++;
if (ipl == iplLast)
return;
_iplGood[ipl]++;
_iplTicks[iplLast] += curTick - iplLastTick;
iplLastTick = curTick;
iplLast = ipl;
}
void
KSData::mode(bool user)
{
_mode[user]++;
if (user == lastUser)
return;
_modeGood[user]++;
_modeTicks[lastUser] += curTick - lastModeTick;
lastModeTick = curTick;
lastUser = user;
if (xc->system->bin) {
if (!xc->swCtx || xc->swCtx->callStack.empty()) {
if (user)
xc->system->User->activate();
else
xc->system->Kernel->activate();
}
}
}
void
KSData::callpal(int code)
{
if (!PAL::name(code))
return;
_callpal[code]++;
switch (code) {
case PAL::callsys:
{
int number = xc->regs.intRegFile[0];
if (SystemCalls<Tru64>::validSyscallNumber(number)) {
int cvtnum = SystemCalls<Tru64>::convert(number);
_syscall[cvtnum]++;
}
}
break;
}
if (code == PAL::swpctx) {
SWContext *out = xc->swCtx;
System *sys = xc->system;
if (!sys->bin)
return;
DPRINTF(TCPIP, "swpctx event\n");
if (out) {
DPRINTF(TCPIP, "swapping context out with this stack!\n");
xc->system->dumpState(xc);
Addr oldPCB = xc->regs.ipr[TheISA::IPR_PALtemp23];
if (out->callStack.empty()) {
DPRINTF(TCPIP, "but removing it, cuz empty!\n");
SWContext *find = sys->findContext(oldPCB);
if (find) {
assert(sys->findContext(oldPCB) == out);
sys->remContext(oldPCB);
}
delete out;
} else {
DPRINTF(TCPIP, "switching out context with pcb %#x, top fn %s\n",
oldPCB, out->callStack.top()->name);
if (!sys->findContext(oldPCB)) {
if (!sys->addContext(oldPCB, out))
panic("could not add context");
}
}
}
Addr newPCB = xc->regs.intRegFile[16];
SWContext *in = sys->findContext(newPCB);
xc->swCtx = in;
if (in) {
assert(!in->callStack.empty() &&
"should not be switching in empty context");
DPRINTF(TCPIP, "swapping context in with this callstack!\n");
xc->system->dumpState(xc);
sys->remContext(newPCB);
fnCall *top = in->callStack.top();
DPRINTF(TCPIP, "switching in to pcb %#x, %s\n", newPCB, top->name);
assert(top->myBin && "should not switch to context with no Bin");
top->myBin->activate();
} else {
sys->Kernel->activate();
}
DPRINTF(TCPIP, "end swpctx\n");
}
}