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Give nq cl_usleep.

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Cuts nq-glx' cpu usage to about 25% on my system. However, the default is
off.
This commit is contained in:
Bill Currie 2010-11-29 19:50:59 +09:00
parent 516a841479
commit e32e8f3cd3
1 changed files with 28 additions and 6 deletions
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34
nq/source/host.c
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@ -31,6 +31,10 @@
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#ifdef HAVE_UNISTD_H
# include "unistd.h"
#endif
#include "QF/cbuf.h"
#include "QF/idparse.h"
#include "QF/cdaudio.h"
@ -132,7 +136,15 @@ cvar_t *deathmatch;
cvar_t *pausable;
cvar_t *temp1;
cvar_t *cl_usleep;
static int cl_usleep_cache;
static void
cl_usleep_f (cvar_t *var)
{
cl_usleep_cache = var->int_val;
}
void
@ -280,6 +292,10 @@ Host_InitLocal (void)
coop = Cvar_Get ("coop", "0", CVAR_NONE, NULL, "0 or 1");
pausable = Cvar_Get ("pausable", "1", CVAR_NONE, NULL, "None");
temp1 = Cvar_Get ("temp1", "0", CVAR_NONE, NULL, "None");
cl_usleep = Cvar_Get ("cl_usleep", "0", CVAR_ARCHIVE, cl_usleep_f,
"Turn this on to save cpu when fps limited. "
"May affect frame rate adversely depending on "
"local machine/os conditions");
Host_FindMaxClients ();
@ -532,7 +548,7 @@ Host_ClearMemory (void)
Returns false if the time is too short to run a frame
*/
static qboolean
static float
Host_FilterTime (float time)
{
float timedifference;
@ -551,7 +567,7 @@ Host_FilterTime (float time)
timedifference = (timescale / 72.0) - (realtime - oldrealtime);
if (!cls.timedemo && (timedifference > 0))
return false; // framerate is too high
return timedifference; // framerate is too high
host_frametime = realtime - oldrealtime;
oldrealtime = realtime;
@ -564,7 +580,7 @@ Host_FilterTime (float time)
else // don't allow really long or short frames
host_frametime = bound (0.001, host_frametime, 0.1);
return true;
return 0;
}
void
@ -650,6 +666,7 @@ static void
_Host_Frame (float time)
{
static int first = 1;
float sleeptime;
if (setjmp (host_abortserver))
return; // something bad happened, or the
@ -658,9 +675,14 @@ _Host_Frame (float time)
rand (); // keep the random time dependent
// decide the simulation time
if (!Host_FilterTime (time))
return; // don't run too fast, or packets
// will flood out
if ((sleeptime = Host_FilterTime (time)) != 0) {
// don't run too fast, or packet will flood outs
#ifdef HAVE_USLEEP
if (cl_usleep_cache && sleeptime > 0.002) // minimum sleep time
usleep ((unsigned long) (sleeptime * 1000000 / 2));
#endif
return;
}
if (cls.state != ca_dedicated)
IN_ProcessEvents ();