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// High_Res_Timer.cpp
// $Id$
#define ACE_BUILD_DLL
#include "ace/High_Res_Timer.h"
#if !defined (__ACE_INLINE__)
#include "ace/High_Res_Timer.i"
#endif /* __ACE_INLINE__ */
ACE_ALLOC_HOOK_DEFINE(ACE_High_Res_Timer)
// For Intel platforms, a scale factor is required for
// ACE_OS::gethrtime. We'll still set this to one to prevent division
// by zero errors.
#if defined (ACE_WIN32)
u_long ACE_High_Res_Timer::global_scale_factor_ = 1;
#else
// A scale_factor of 1000 converts nanosecond ticks to microseconds.
// That is, on these platforms, 1 tick == 1 nanosecond.
u_long ACE_High_Res_Timer::global_scale_factor_ = 1000;
#endif /* ACE_WIN32 */
void
ACE_High_Res_Timer::dump (void) const
{
ACE_TRACE ("ACE_High_Res_Timer::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
ACE_DEBUG ((LM_DEBUG, "\n"));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}
void
ACE_High_Res_Timer::reset (void)
{
ACE_TRACE ("ACE_High_Res_Timer::reset");
(void) ACE_OS::memset (&this->start_, 0, sizeof this->start_);
(void) ACE_OS::memset (&this->end_, 0, sizeof this->end_);
(void) ACE_OS::memset (&this->total_, 0, sizeof this->total_);
(void) ACE_OS::memset (&this->start_incr_, 0, sizeof this->start_incr_);
}
void
ACE_High_Res_Timer::elapsed_time (ACE_Time_Value &tv)
{
tv.sec ((long) ((this->end_ - this->start_) / global_scale_factor_) / 1000000);
tv.usec ((long) ((this->end_ - this->start_) / global_scale_factor_) % 1000000);
}
#if defined (ACE_HAS_POSIX_TIME)
void
ACE_High_Res_Timer::elapsed_time (struct timespec &elapsed_time)
{
// See elapsed_time (ACE_hrtime_t &nanoseconds) implementation below;
// this implementation is based on that.
// Just grab the nanoseconds. That is, leave off all values above
// microsecond. This equation is right! Don't mess with me!
// The cast avoids a MSVC 4.1 compiler warning about narrowing.
u_long nseconds = (u_long) ((this->end_ - this->start_) % global_scale_factor_ * 1000 / global_scale_factor_);
// Get just the microseconds (dropping any left over nanoseconds).
ACE_hrtime_t useconds;
useconds = (this->end_ - this->start_) / global_scale_factor_;
elapsed_time.tv_sec = (time_t) (useconds / 1000000);
elapsed_time.tv_nsec = (time_t) (useconds % 1000000 * 1000 + nseconds);
}
#endif /* ACE_HAS_POSIX_TIME */
void
ACE_High_Res_Timer::elapsed_time_incr (ACE_Time_Value &tv)
{
// Leave off any microseconds using DIV.
tv.sec ((long) (this->total_ / global_scale_factor_) / 1000000);
// Leave off any seconds using MOD.
tv.usec ((long) (this->total_ / global_scale_factor_) % 1000000);
}
// The whole point is to get nanoseconds. However, our scale_factor
// gives us microseconds. We could use floating points to get the
// nanosecond precision if some compilers didn't barf on 64-bit
// divisions with doubles. So, we just extract out the nanoseconds
// first and then add them to the standard miscrosecond calculation.
void
ACE_High_Res_Timer::elapsed_time (ACE_hrtime_t &nanoseconds)
{
// Just grab the nanoseconds. That is, leave off all values above
// microsecond. This equation is right! Don't mess with me!
// The cast avoids a MSVC 4.1 compiler warning about narrowing.
u_long nseconds = (u_long) ((this->end_ - this->start_) % global_scale_factor_ * 1000 / global_scale_factor_);
// Get just the microseconds (dropping any left over nanoseconds).
ACE_hrtime_t useconds;
useconds = (this->end_ - this->start_) / global_scale_factor_;
// Total nanoseconds in a single 64-bit value.
nanoseconds = useconds * 1000 + nseconds;
}
void
ACE_High_Res_Timer::print_ave (const char *str, const int count, ACE_HANDLE handle)
{
ACE_TRACE ("ACE_High_Res_Timer::print_ave");
// Get the total number of nanoseconds elapsed.
ACE_hrtime_t total_nanoseconds;
this->elapsed_time (total_nanoseconds);
// Separate to seconds and nanoseconds.
ACE_hrtime_t total_secs = total_nanoseconds / 1000000000;
u_long extra_nsecs = (u_long) (total_nanoseconds % 1000000000);
char buf[100];
if (count > 1)
{
ACE_hrtime_t avg_nsecs = total_nanoseconds / count;
ACE_OS::sprintf (buf, " count = %d, total (secs %lld, usecs %lu), avg usecs = %lld\n",
count, total_secs, (extra_nsecs + 500) / 1000,
(avg_nsecs + 500) / 1000);
}
else
ACE_OS::sprintf (buf, " total %3lld.%06lu secs\n",
total_secs, (extra_nsecs + 500) / 1000);
ACE_OS::write (handle, str, strlen (str));
ACE_OS::write (handle, buf, strlen (buf));
}
void
ACE_High_Res_Timer::print_total (const char *str, const int count, ACE_HANDLE handle)
{
ACE_TRACE ("ACE_High_Res_Timer::print_total");
// Get the total number of nanoseconds elapsed.
ACE_hrtime_t total_nanoseconds;
this->elapsed_time (total_nanoseconds);
// Separate to seconds and nanoseconds.
ACE_hrtime_t total_secs = total_nanoseconds / 1000000000;
u_long extra_nsecs = (u_long) (total_nanoseconds % 1000000000);
char buf[100];
if (count > 1)
{
ACE_hrtime_t avg_nsecs = this->total_ / count;
ACE_OS::sprintf (buf, " count = %d, total (secs %lld, usecs %lu), avg usecs = %lld\n",
count, total_secs, (extra_nsecs + 500) / 1000,
(avg_nsecs + 500) / 1000);
}
else
ACE_OS::sprintf (buf, " total %3lld.%06lu secs\n",
total_secs, (extra_nsecs + 500) / 1000);
ACE_OS::write (handle, str, strlen (str));
ACE_OS::write (handle, buf, strlen (buf));
}
int
ACE_High_Res_Timer::get_env_global_scale_factor (const char *env)
{
if (env != 0)
{
const char *env_value = ACE_OS::getenv (env);
if (env_value != 0)
{
int value = ACE_OS::atoi (env_value);
if (value > 0)
{
ACE_High_Res_Timer::global_scale_factor (value);
return 0;
}
}
}
return -1;
}
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