time: improve time datastructure
Use posix clock functions (and librt) if it is available. Inline a bunch of functions and implement more operators. * * * time: more cleanup
This commit is contained in:
Nathan Binkert
parent
c82a8979a3
commit
318bfe9d4f
11
SConstruct
11
SConstruct
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@ -703,6 +703,13 @@ if not conf.CheckLibWithHeader('z', 'zlib.h', 'C++','zlibVersion();'):
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print ' Please install zlib and try again.'
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Exit(1)
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# Check for librt.
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have_posix_clock = conf.CheckLib(None, 'clock_nanosleep', 'time.h') or \
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conf.CheckLib('rt', 'clock_nanosleep', 'time.h')
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if not have_posix_clock:
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print "Can't find library for POSIX clocks."
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# Check for <fenv.h> (C99 FP environment control)
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have_fenv = conf.CheckHeader('fenv.h', '<>')
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if not have_fenv:
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@ -819,6 +826,7 @@ sticky_vars.AddVariables(
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'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
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False),
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BoolVariable('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
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BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock),
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BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
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BoolVariable('USE_CHECKER', 'Use checker for detailed CPU models', False),
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BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False),
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@ -828,7 +836,8 @@ sticky_vars.AddVariables(
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# These variables get exported to #defines in config/*.hh (see src/SConscript).
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export_vars += ['FULL_SYSTEM', 'USE_FENV', 'USE_MYSQL',
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'NO_FAST_ALLOC', 'FAST_ALLOC_DEBUG', 'FAST_ALLOC_STATS',
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'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE']
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'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE',
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'USE_POSIX_CLOCK' ]
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###################################################
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#
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123
src/base/time.cc
123
src/base/time.cc
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@ -28,85 +28,35 @@
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* Authors: Nathan Binkert
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*/
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#include <cctype>
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#include <cstring>
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#include <ctime>
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#include <iostream>
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#include <string>
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#include <sstream>
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#include "base/time.hh"
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#include "config/use_posix_clock.hh"
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using namespace std;
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struct _timeval
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void
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Time::_set(bool monotonic)
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{
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#if USE_POSIX_CLOCK
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::clock_gettime(monotonic ? CLOCK_MONOTONIC : CLOCK_REALTIME, &_time);
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#else
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timeval tv;
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};
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double
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convert(const timeval &tv)
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{
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return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
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}
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Time::Time(bool set_now)
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{
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time = new _timeval;
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if (set_now)
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set();
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}
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Time::Time(const timeval &val)
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{
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time = new _timeval;
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set(val);
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}
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Time::Time(const Time &val)
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{
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time = new _timeval;
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set(val.get());
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}
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Time::~Time()
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{
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delete time;
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}
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const timeval &
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Time::get() const
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{
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return time->tv;
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}
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void
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Time::set()
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{
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::gettimeofday(&time->tv, NULL);
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}
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void
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Time::set(const timeval &tv)
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{
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memcpy(&time->tv, &tv, sizeof(timeval));
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}
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double
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Time::operator()() const
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{
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return convert(get());
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::gettimeofday(&tv, NULL);
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operator=(tv);
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#endif
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}
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string
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Time::date(string format) const
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Time::date(const string &format) const
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{
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const timeval &tv = get();
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time_t sec = tv.tv_sec;
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time_t sec = this->sec();
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char buf[256];
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if (format.empty()) {
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#ifdef __SUNPRO_CC
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ctime_r(&sec, buf, 256);
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ctime_r(&sec, buf, sizeof(buf));
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#else
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ctime_r(&sec, buf);
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#endif
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@ -119,19 +69,44 @@ Time::date(string format) const
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return buf;
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}
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ostream &
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operator<<(ostream &out, const Time &start)
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string
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Time::time() const
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{
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out << start.date();
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return out;
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double time = double(*this);
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double secs = fmod(time, 60.0);
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double all_mins = floor(time / 60.0);
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double mins = fmod(all_mins, 60.0);
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double hours = floor(all_mins / 60.0);
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stringstream str;
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if (hours > 0.0) {
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if (hours < 10.0)
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str << '0';
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str << hours << ':';
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}
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if (mins > 0.0) {
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if (mins < 10.0)
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str << '0';
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str << mins << ':';
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}
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if (secs < 10.0 && !str.str().empty())
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str << '0';
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str << secs;
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return str.str();
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}
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Time
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operator-(const Time &l, const Time &r)
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void
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sleep(const Time &time)
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{
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timeval tv;
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timersub(&l.get(), &r.get(), &tv);
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return tv;
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}
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timespec ts = time;
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const Time Time::start(true);
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#if USE_POSIX_CLOCK
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clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
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#else
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nanosleep(&ts, NULL);
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#endif
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}
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261
src/base/time.hh
261
src/base/time.hh
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@ -29,84 +29,223 @@
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* Nathan Binkert
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*/
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#ifndef __SIM_TIME_HH__
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#define __SIM_TIME_HH__
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#ifndef __BASE_TIME_HH__
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#define __BASE_TIME_HH__
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#include <sys/time.h>
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#include <inttypes.h>
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#include <cmath>
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#include <cstring>
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#include <ctime>
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#include <iosfwd>
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#include <string>
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struct _timeval;
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class Time
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{
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protected:
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mutable _timeval *time;
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timespec _time;
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/**
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* Internal time set function
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*/
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void _set(bool monotonic);
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public:
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explicit Time(bool set_now = false);
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Time(const timeval &val);
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Time(const Time &val);
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~Time();
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void set();
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const timeval &get() const;
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void set(const timeval &val);
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double operator()() const;
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std::string date(std::string format = "") const;
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static const long NSEC_PER_SEC = 1000 * 1000 * 1000;
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static const long NSEC_PER_MSEC = 1000 * 1000;
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static const long NSEC_PER_USEC = 1000;
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public:
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static const Time start;
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explicit Time() { clear(); }
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explicit Time(double sec) { operator=(sec); }
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Time(const Time &val) : _time(val._time) { }
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Time(uint64_t sec, uint64_t nsec) { set(sec, nsec); }
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Time(const timeval &tv) { operator=(tv); }
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Time(const timespec &ts) { operator=(ts); }
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/**
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* Accessors for getting and setting the current clock
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*/
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time_t sec() const { return _time.tv_sec; }
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long msec() const { return _time.tv_nsec / NSEC_PER_MSEC; }
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long usec() const { return _time.tv_nsec / NSEC_PER_USEC; }
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long nsec() const { return _time.tv_nsec; }
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void sec(time_t sec) { _time.tv_sec = sec; }
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void msec(long msec) { _time.tv_nsec = msec * NSEC_PER_MSEC; }
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void usec(long usec) { _time.tv_nsec = usec * NSEC_PER_USEC; }
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void nsec(long nsec) { _time.tv_nsec = nsec; }
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/**
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* Clear the time
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*/
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void clear() { memset(&_time, 0, sizeof(_time)); }
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/**
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* Use this to set time for the purposes of time measurement (use
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* a monotonic clock if it is available
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*/
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void setTimer() { _set(true); }
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/**
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* Use this to set the time to the actual current time
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*/
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void setWallclock() { _set(false); }
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/**
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* Set the current time
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*/
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void set(time_t _sec, long _nsec) { sec(_sec); nsec(_nsec); }
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const Time &
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operator=(const Time &other)
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{
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sec(other.sec());
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nsec(other.nsec());
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return *this;
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}
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const Time &
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operator=(double new_time)
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{
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double seconds = floor(new_time);
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sec((time_t)seconds);
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nsec((long)((seconds - new_time) * 1e9));
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return *this;
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}
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const Time &
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operator=(const timeval &tv)
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{
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sec(tv.tv_sec);
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nsec(tv.tv_usec * 1000);
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return *this;
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}
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const Time &
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operator=(const timespec &ts)
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{
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sec(ts.tv_sec);
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nsec(ts.tv_nsec);
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return *this;
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}
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/**
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* Get the time in floating point seconds
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*/
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operator double() const
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{
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return (double)sec() + ((double)nsec()) * 1e-9;
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}
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/**
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* operators for time conversion
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*/
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operator timespec() const { return _time; }
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operator timeval() const
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{
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timeval tv;
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tv.tv_sec = sec();
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tv.tv_usec = usec();
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return tv;
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}
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const Time &
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operator+=(const Time &other)
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{
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_time.tv_sec += other.sec();
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_time.tv_nsec += other.nsec();
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if (_time.tv_nsec > NSEC_PER_SEC) {
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_time.tv_sec++;
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_time.tv_nsec -= NSEC_PER_SEC;
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}
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return *this;
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}
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const Time &
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operator-=(const Time &other)
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{
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_time.tv_sec -= other.sec();
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_time.tv_nsec -= other.nsec();
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if (_time.tv_nsec < 0) {
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_time.tv_sec--;
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_time.tv_nsec += NSEC_PER_SEC;
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}
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return *this;
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}
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std::string date(const std::string &format = "") const;
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std::string time() const;
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};
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Time operator-(const Time &l, const Time &r);
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void sleep(const Time &time);
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std::ostream &operator<<(std::ostream &out, const Time &time);
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inline bool
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operator==(const Time &l, const Time &r)
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{
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return l.sec() == r.sec() && l.nsec() == r.nsec();
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}
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inline bool
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operator!=(const Time &l, const Time &r)
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{
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return l.sec() != r.sec() || l.nsec() != r.nsec();
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}
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. 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
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* are met:
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* 1. 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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* 2. 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)time.h 8.2 (Berkeley) 7/10/94
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*/
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inline bool
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operator<(const Time &l, const Time &r)
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{
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return (l.sec() < r.sec()) ||
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(l.sec() == r.sec() && l.nsec() < r.nsec());
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}
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#if defined(__sun)
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#define timersub(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
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(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
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if ((vvp)->tv_usec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_usec += 1000000; \
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} \
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} while (0)
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#endif
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inline bool
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operator<=(const Time &l, const Time &r)
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{
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return (l.sec() < r.sec()) ||
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(l.sec() == r.sec() && l.nsec() <= r.nsec());
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}
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#endif // __SIM_TIME_HH__
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inline bool
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operator>(const Time &l, const Time &r)
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{
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return (l.sec() > r.sec()) ||
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(l.sec() == r.sec() && l.nsec() > r.nsec());
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}
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inline bool
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operator>=(const Time &l, const Time &r)
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{
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return (l.sec() > r.sec()) ||
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(l.sec() == r.sec() && l.nsec() >= r.nsec());
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}
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inline Time
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operator+(const Time &l, const Time &r)
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{
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Time time(l);
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time += r;
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return time;
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}
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inline Time
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operator-(const Time &l, const Time &r)
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{
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Time time(l);
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time -= r;
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return time;
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}
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inline std::ostream &
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operator<<(std::ostream &out, const Time &time)
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{
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out << time.date();
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return out;
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}
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#endif // __BASE_TIME_HH__
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@ -65,7 +65,7 @@ struct SimTicksReset : public Callback
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{
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void process()
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{
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statTime.set();
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statTime.setTimer();
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startTick = curTick();
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}
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};
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@ -73,9 +73,11 @@ struct SimTicksReset : public Callback
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double
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statElapsedTime()
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{
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Time now(true);
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Time now;
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now.setTimer();
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Time elapsed = now - statTime;
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return elapsed();
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return elapsed;
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}
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Tick
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