changeset ed75cee5c793 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=ed75cee5c793
description:
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
diffstat:
SConstruct | 11 +-
src/base/time.cc | 123 +++++++++-------------
src/base/time.hh | 261 ++++++++++++++++++++++++++++++++++++-----------
src/sim/stat_control.cc | 8 +-
4 files changed, 264 insertions(+), 139 deletions(-)
diffs (truncated from 507 to 300 lines):
diff -r 9e556fb25900 -r ed75cee5c793 SConstruct
--- a/SConstruct Mon Jan 17 18:46:16 2011 -0600
+++ b/SConstruct Sat Jan 15 07:48:25 2011 -0800
@@ -703,6 +703,13 @@
print ' Please install zlib and try again.'
Exit(1)
+# Check for librt.
+have_posix_clock = conf.CheckLib(None, 'clock_nanosleep', 'time.h') or \
+ conf.CheckLib('rt', 'clock_nanosleep', 'time.h')
+
+if not have_posix_clock:
+ print "Can't find library for POSIX clocks."
+
# Check for <fenv.h> (C99 FP environment control)
have_fenv = conf.CheckHeader('fenv.h', '<>')
if not have_fenv:
@@ -819,6 +826,7 @@
'Compile for SSE2 (-msse2) to get IEEE FP on x86 hosts',
False),
BoolVariable('USE_MYSQL', 'Use MySQL for stats output', have_mysql),
+ BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock),
BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
BoolVariable('USE_CHECKER', 'Use checker for detailed CPU models', False),
BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability',
False),
@@ -828,7 +836,8 @@
# These variables get exported to #defines in config/*.hh (see src/SConscript).
export_vars += ['FULL_SYSTEM', 'USE_FENV', 'USE_MYSQL',
'NO_FAST_ALLOC', 'FAST_ALLOC_DEBUG', 'FAST_ALLOC_STATS',
- 'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE']
+ 'SS_COMPATIBLE_FP', 'USE_CHECKER', 'TARGET_ISA', 'CP_ANNOTATE',
+ 'USE_POSIX_CLOCK' ]
###################################################
#
diff -r 9e556fb25900 -r ed75cee5c793 src/base/time.cc
--- a/src/base/time.cc Mon Jan 17 18:46:16 2011 -0600
+++ b/src/base/time.cc Sat Jan 15 07:48:25 2011 -0800
@@ -28,85 +28,35 @@
* Authors: Nathan Binkert
*/
-#include <cctype>
-#include <cstring>
-#include <ctime>
#include <iostream>
-#include <string>
+#include <sstream>
#include "base/time.hh"
+#include "config/use_posix_clock.hh"
using namespace std;
-struct _timeval
+void
+Time::_set(bool monotonic)
{
+#if USE_POSIX_CLOCK
+ ::clock_gettime(monotonic ? CLOCK_MONOTONIC : CLOCK_REALTIME, &_time);
+#else
timeval tv;
-};
-
-double
-convert(const timeval &tv)
-{
- return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
-}
-
-Time::Time(bool set_now)
-{
- time = new _timeval;
- if (set_now)
- set();
-}
-
-Time::Time(const timeval &val)
-{
- time = new _timeval;
- set(val);
-}
-
-Time::Time(const Time &val)
-{
- time = new _timeval;
- set(val.get());
-}
-
-Time::~Time()
-{
- delete time;
-}
-
-const timeval &
-Time::get() const
-{
- return time->tv;
-}
-
-void
-Time::set()
-{
- ::gettimeofday(&time->tv, NULL);
-}
-
-void
-Time::set(const timeval &tv)
-{
- memcpy(&time->tv, &tv, sizeof(timeval));
-}
-
-double
-Time::operator()() const
-{
- return convert(get());
+ ::gettimeofday(&tv, NULL);
+ operator=(tv);
+#endif
}
string
-Time::date(string format) const
+Time::date(const string &format) const
{
- const timeval &tv = get();
- time_t sec = tv.tv_sec;
+ time_t sec = this->sec();
char buf[256];
if (format.empty()) {
#ifdef __SUNPRO_CC
- ctime_r(&sec, buf, 256);
+ ctime_r(&sec, buf, sizeof(buf));
#else
ctime_r(&sec, buf);
#endif
@@ -119,19 +69,44 @@
return buf;
}
-ostream &
-operator<<(ostream &out, const Time &start)
+string
+Time::time() const
{
- out << start.date();
- return out;
+ double time = double(*this);
+ double secs = fmod(time, 60.0);
+ double all_mins = floor(time / 60.0);
+ double mins = fmod(all_mins, 60.0);
+ double hours = floor(all_mins / 60.0);
+
+ stringstream str;
+
+ if (hours > 0.0) {
+ if (hours < 10.0)
+ str << '0';
+ str << hours << ':';
+ }
+
+ if (mins > 0.0) {
+ if (mins < 10.0)
+ str << '0';
+ str << mins << ':';
+ }
+
+ if (secs < 10.0 && !str.str().empty())
+ str << '0';
+ str << secs;
+
+ return str.str();
}
-Time
-operator-(const Time &l, const Time &r)
+void
+sleep(const Time &time)
{
- timeval tv;
- timersub(&l.get(), &r.get(), &tv);
- return tv;
+ timespec ts = time;
+
+#if USE_POSIX_CLOCK
+ clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
+#else
+ nanosleep(&ts, NULL);
+#endif
}
-
-const Time Time::start(true);
diff -r 9e556fb25900 -r ed75cee5c793 src/base/time.hh
--- a/src/base/time.hh Mon Jan 17 18:46:16 2011 -0600
+++ b/src/base/time.hh Sat Jan 15 07:48:25 2011 -0800
@@ -29,84 +29,223 @@
* Nathan Binkert
*/
-#ifndef __SIM_TIME_HH__
-#define __SIM_TIME_HH__
+#ifndef __BASE_TIME_HH__
+#define __BASE_TIME_HH__
#include <sys/time.h>
+#include <inttypes.h>
+
+#include <cmath>
+#include <cstring>
+#include <ctime>
#include <iosfwd>
#include <string>
-struct _timeval;
-
class Time
{
protected:
- mutable _timeval *time;
+ timespec _time;
+
+ /**
+ * Internal time set function
+ */
+ void _set(bool monotonic);
public:
- explicit Time(bool set_now = false);
- Time(const timeval &val);
- Time(const Time &val);
- ~Time();
-
- void set();
- const timeval &get() const;
- void set(const timeval &val);
-
- double operator()() const;
- std::string date(std::string format = "") const;
+ static const long NSEC_PER_SEC = 1000 * 1000 * 1000;
+ static const long NSEC_PER_MSEC = 1000 * 1000;
+ static const long NSEC_PER_USEC = 1000;
public:
- static const Time start;
+ explicit Time() { clear(); }
+ explicit Time(double sec) { operator=(sec); }
+ Time(const Time &val) : _time(val._time) { }
+ Time(uint64_t sec, uint64_t nsec) { set(sec, nsec); }
+ Time(const timeval &tv) { operator=(tv); }
+ Time(const timespec &ts) { operator=(ts); }
+
+ /**
+ * Accessors for getting and setting the current clock
+ */
+ time_t sec() const { return _time.tv_sec; }
+ long msec() const { return _time.tv_nsec / NSEC_PER_MSEC; }
+ long usec() const { return _time.tv_nsec / NSEC_PER_USEC; }
+ long nsec() const { return _time.tv_nsec; }
+
+ void sec(time_t sec) { _time.tv_sec = sec; }
+ void msec(long msec) { _time.tv_nsec = msec * NSEC_PER_MSEC; }
+ void usec(long usec) { _time.tv_nsec = usec * NSEC_PER_USEC; }
+ void nsec(long nsec) { _time.tv_nsec = nsec; }
+
+ /**
+ * Clear the time
+ */
+ void clear() { memset(&_time, 0, sizeof(_time)); }
+
+ /**
+ * Use this to set time for the purposes of time measurement (use
+ * a monotonic clock if it is available
+ */
+ void setTimer() { _set(true); }
+
+ /**
+ * Use this to set the time to the actual current time
+ */
+ void setWallclock() { _set(false); }
+
+ /**
+ * Set the current time
+ */
+ void set(time_t _sec, long _nsec) { sec(_sec); nsec(_nsec); }
+
+ const Time &
+ operator=(const Time &other)
+ {
+ sec(other.sec());
+ nsec(other.nsec());
+ return *this;
+ }
+
+ const Time &
+ operator=(double new_time)
+ {
+ double seconds = floor(new_time);
+ sec((time_t)seconds);
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