9471a4d20f
make SIGUSR2 dump and reset stats
Make resetting time work
base/statistics.cc:
Fix statistics reset so that it works again, and correctly
reset bins as well. (The old code wouldn't reset if you didn't
have any bins, and then would actually only reset the first
bin)
cpu/simple_cpu/simple_cpu.cc:
cpu/simple_cpu/simple_cpu.hh:
convert idleCycles/idleFraction into a single Average stat
to make reset work more simply
sim/main.cc:
handle SIGUSR2 to dump and reset stats
(SIGUSR1 only dumps them)
sim/sim_time.cc:
sim/sim_time.hh:
Add support for resetting the time
--HG--
extra : convert_revision : ea43e03c50c0a4bb826dc0842a8c4fa1a9289e0a
444 lines
14 KiB
C++
444 lines
14 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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///
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/// @file sim/main.cc
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///
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <string>
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#include <vector>
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#include "base/copyright.hh"
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#include "base/inifile.hh"
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#include "base/misc.hh"
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#include "base/pollevent.hh"
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#include "base/statistics.hh"
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#include "cpu/base_cpu.hh"
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#include "cpu/full_cpu/smt.hh"
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#include "sim/async.hh"
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#include "sim/builder.hh"
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#include "sim/configfile.hh"
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#include "sim/host.hh"
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#include "sim/sim_events.hh"
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#include "sim/sim_exit.hh"
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#include "sim/sim_object.hh"
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#include "sim/sim_stats.hh"
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#include "sim/sim_time.hh"
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using namespace std;
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// See async.h.
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volatile bool async_event = false;
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volatile bool async_dump = false;
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volatile bool async_dumpreset = false;
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volatile bool async_exit = false;
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volatile bool async_io = false;
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volatile bool async_alarm = false;
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/// Stats signal handler.
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void
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dumpStatsHandler(int sigtype)
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{
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async_event = true;
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async_dump = true;
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}
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void
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dumprstStatsHandler(int sigtype)
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{
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async_event = true;
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async_dumpreset = true;
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}
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/// Exit signal handler.
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void
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exitNowHandler(int sigtype)
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{
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async_event = true;
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async_exit = true;
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}
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/// Simulator executable name
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const char *myProgName = "";
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/// Show brief help message.
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static void
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showBriefHelp(ostream &out)
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{
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out << "Usage: " << myProgName
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<< " [-hn] [-Dname[=def]] [-Uname] [-I[dir]] "
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<< "[--<section>:<param>=<value>] [<config file> ...]" << endl
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<< " -h: print long help (including parameter listing)" << endl
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<< " -n: don't load default.ini" << endl
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<< " -u: don't quit on unreferenced parameters" << endl
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<< " -D,-U,-I: passed to cpp for preprocessing .ini files" << endl;
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}
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/// Show verbose help message. Includes parameter listing from
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/// showBriefHelp(), plus an exhaustive list of ini-file parameters
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/// and SimObjects (with their parameters).
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static void
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showLongHelp(ostream &out)
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{
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showBriefHelp(out);
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out << endl
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<< endl
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<< "-----------------" << endl
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<< "Global Parameters" << endl
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<< "-----------------" << endl
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<< endl;
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ParamContext::describeAllContexts(out);
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out << endl
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<< endl
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<< "-----------------" << endl
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<< "Simulator Objects" << endl
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<< "-----------------" << endl
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<< endl;
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SimObjectClass::describeAllClasses(out);
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}
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/// Print welcome message.
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static void
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sayHello(ostream &out)
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{
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extern const char *compileDate; // from date.cc
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ccprintf(out, "M5 Simulator System\n");
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// display copyright
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ccprintf(out, "%s\n", briefCopyright);
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ccprintf(out, "M5 compiled on %d\n", compileDate);
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char *host = getenv("HOSTNAME");
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if (!host)
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host = getenv("HOST");
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if (host)
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ccprintf(out, "M5 executing on %s\n", host);
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ccprintf(out, "M5 simulation started %s\n", Time::start);
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}
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///
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/// Echo the command line for posterity in such a way that it can be
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/// used to rerun the same simulation (given the same .ini files).
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///
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static void
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echoCommandLine(int argc, char **argv, ostream &out)
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{
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out << "command line: " << argv[0];
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for (int i = 1; i < argc; i++) {
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string arg(argv[i]);
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out << ' ';
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// If the arg contains spaces, we need to quote it.
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// The rest of this is overkill to make it look purty.
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// print dashes first outside quotes
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int non_dash_pos = arg.find_first_not_of("-");
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out << arg.substr(0, non_dash_pos); // print dashes
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string body = arg.substr(non_dash_pos); // the rest
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// if it's an assignment, handle the lhs & rhs separately
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int eq_pos = body.find("=");
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if (eq_pos == string::npos) {
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out << quote(body);
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}
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else {
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string lhs(body.substr(0, eq_pos));
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string rhs(body.substr(eq_pos + 1));
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out << quote(lhs) << "=" << quote(rhs);
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}
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}
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out << endl << endl;
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}
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///
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/// The simulator configuration database. This is the union of all
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/// specified .ini files. This shouldn't need to be visible outside
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/// this file, as it is passed as a parameter to all the param-parsing
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/// routines.
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///
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static IniFile simConfigDB;
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/// Check for a default.ini file and load it if necessary.
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static void
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handleDefaultIni(bool &loadIt, vector<char *> &cppArgs)
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{
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struct stat sb;
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if (loadIt) {
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if (stat("default.ini", &sb) == 0) {
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if (!simConfigDB.loadCPP("default.ini", cppArgs)) {
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cout << "Error processing file default.ini" << endl;
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exit(1);
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}
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}
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// set this whether it actually was found or not, so we don't
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// bother to check again next time
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loadIt = false;
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}
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}
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/// M5 entry point.
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int
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main(int argc, char **argv)
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{
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// Save off program name
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myProgName = argv[0];
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signal(SIGFPE, SIG_IGN); // may occur on misspeculated paths
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signal(SIGPIPE, SIG_IGN);
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signal(SIGTRAP, SIG_IGN);
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signal(SIGUSR1, dumpStatsHandler); // dump intermediate stats
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signal(SIGUSR2, dumprstStatsHandler); // dump and reset stats
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signal(SIGINT, exitNowHandler); // dump final stats and exit
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sayHello(cerr);
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// Initialize statistics database
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initBaseStats();
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vector<char *> cppArgs;
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// Should we use default.ini if it exists? By default, yes. (Use
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// -n to override.)
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bool loadDefaultIni = true;
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// Should we quit if there are unreferenced parameters? By
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// default, yes... it's a good way of catching typos in
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// section/parameter names (which otherwise go by silently). Use
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// -u to override.
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bool quitOnUnreferenced = true;
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// Parse command-line options. The tricky part here is figuring
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// out whether to look for & load default.ini, and if needed,
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// doing so at the right time w.r.t. processing the other
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// parameters.
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//
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// Since most of the complex options are handled through the
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// config database, we don't mess with getopts, and just parse
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// manually.
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for (int i = 1; i < argc; ++i) {
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char *arg_str = argv[i];
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// if arg starts with '-', parse as option,
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// else treat it as a configuration file name and load it
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if (arg_str[0] == '-') {
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// switch on second char
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switch (arg_str[1]) {
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case 'h':
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// -h: show help
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showLongHelp(cerr);
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exit(1);
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case 'n':
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// -n: don't load default.ini
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if (!loadDefaultIni) {
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cerr << "Warning: -n option needs to precede any "
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<< "explicit configuration file name " << endl
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<< " or command-line configuration parameter."
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<< endl;
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}
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loadDefaultIni = false;
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break;
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case 'u':
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// -u: don't quit on unreferenced parameters
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quitOnUnreferenced = false;
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break;
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case 'D':
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case 'U':
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case 'I':
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// cpp options: record & pass to cpp. Note that these
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// cannot have spaces, i.e., '-Dname=val' is OK, but
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// '-D name=val' is not. I don't consider this a
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// problem, since even though gnu cpp accepts the
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// latter, other cpp implementations do not (Tru64,
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// for one).
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cppArgs.push_back(arg_str);
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break;
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case '-':
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// command-line configuration parameter:
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// '--<section>:<parameter>=<value>'
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// Load default.ini if necessary -- see comment in
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// else clause below.
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handleDefaultIni(loadDefaultIni, cppArgs);
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if (!simConfigDB.add(arg_str + 2)) {
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// parse error
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ccprintf(cerr,
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"Could not parse configuration argument '%s'\n"
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"Expecting --<section>:<parameter>=<value>\n",
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arg_str);
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exit(0);
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}
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break;
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default:
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showBriefHelp(cerr);
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ccprintf(cerr, "Fatal: invalid argument '%s'\n", arg_str);
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exit(0);
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}
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}
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else {
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// no '-', treat as config file name
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// If we haven't loaded default.ini yet, and we want to,
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// now is the time. Can't do it sooner because we need to
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// look for '-n', can't do it later since we want
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// default.ini loaded first (so that any other settings
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// override it).
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handleDefaultIni(loadDefaultIni, cppArgs);
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if (!simConfigDB.loadCPP(arg_str, cppArgs)) {
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cprintf("Error processing file %s\n", arg_str);
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exit(1);
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}
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}
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}
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// Final check for default.ini, in case no config files or
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// command-line config parameters were given.
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handleDefaultIni(loadDefaultIni, cppArgs);
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// The configuration database is now complete; start processing it.
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// Parse and check all non-config-hierarchy parameters.
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ParamContext::parseAllContexts(simConfigDB);
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ParamContext::checkAllContexts();
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// Print header info into stats file. Can't do this sooner since
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// the stat file name is set via a .ini param... thus it just got
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// opened above during ParamContext::checkAllContexts().
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// Print hello message to stats file if it's actually a file. If
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// it's not (i.e. it's cout or cerr) then we already did it above.
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if (statStreamIsFile)
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sayHello(*statStream);
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// Echo command line and all parameter settings to stats file as well.
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echoCommandLine(argc, argv, *statStream);
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ParamContext::showAllContexts(*statStream);
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// Now process the configuration hierarchy and create the SimObjects.
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ConfigHierarchy configHierarchy(simConfigDB);
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configHierarchy.build();
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configHierarchy.createSimObjects();
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// Restore checkpointed state, if any.
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configHierarchy.unserializeSimObjects();
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// Done processing the configuration database.
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// Check for unreferenced entries.
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if (simConfigDB.printUnreferenced() && quitOnUnreferenced) {
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cerr << "Fatal: unreferenced .ini sections/entries." << endl
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<< "If this is not an error, add 'unref_section_ok=y' or "
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<< "'unref_entries_ok=y' to the appropriate sections "
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<< "to suppress this message." << endl;
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exit(1);
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}
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SimObject::regAllStats();
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// uncomment the following to get PC-based execution-time profile
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#ifdef DO_PROFILE
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init_profile((char *)&_init, (char *)&_fini);
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#endif
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// Check to make sure that the stats package is properly initialized
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Statistics::check();
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// Nothing to simulate if we don't have at least one CPU somewhere.
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if (BaseCPU::numSimulatedCPUs() == 0) {
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cerr << "Fatal: no CPUs to simulate." << endl;
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exit(1);
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}
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while (!mainEventQueue.empty()) {
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assert(curTick <= mainEventQueue.nextTick() &&
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"event scheduled in the past");
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// forward current cycle to the time of the first event on the
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// queue
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curTick = mainEventQueue.nextTick();
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mainEventQueue.serviceOne();
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if (async_event) {
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async_event = false;
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if (async_dump) {
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async_dump = false;
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using namespace Statistics;
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SetupEvent(Dump, curTick);
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}
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if (async_dumpreset) {
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async_dumpreset = false;
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using namespace Statistics;
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SetupEvent(Dump | Reset, curTick);
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}
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if (async_exit) {
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async_exit = false;
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new SimExitEvent("User requested STOP");
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}
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if (async_io || async_alarm) {
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async_io = false;
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async_alarm = false;
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pollQueue.service();
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}
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}
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}
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// This should never happen... every conceivable way for the
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// simulation to terminate (hit max cycles/insts, signal,
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// simulated system halts/exits) generates an exit event, so we
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// should never run out of events on the queue.
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exitNow("improperly exited event loop!", 1);
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return 0;
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}
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