added host_sleep cvar, defaults to 1 millisecond wait each frame, this

seems to have no impact on fps on my windows and Linux machines but
reduces cpu usage

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@8848 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/host.c b/host.c
index 95db9771a0cede904439d9270f685fdf46abe3fa..90282634e552f389fae6db66e7e321795864c2e7 100644 (file)
--- a/host.c
+++ b/host.c
@@ -60,6 +60,7 @@ double host_starttime = 0;
 cvar_t host_framerate = {0, "host_framerate","0", "locks frame timing to this value in seconds, 0.05 is 20fps for example, note that this can easily run too fast, use cl_maxfps if you want to limit your framerate instead, or sys_ticrate to limit server speed"};
 // shows time used by certain subsystems
 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
+cvar_t host_sleep = {0, "host_sleep","1", "gives up some processing time to other applications each frame, value in milliseconds"};
 cvar_t cl_minfps = {CVAR_SAVE, "cl_minfps", "40", "minimum fps target - while the rendering performance is below this, it will drift toward lower quality"};
 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
@@ -212,6 +213,7 @@ static void Host_InitLocal (void)
 
        Cvar_RegisterVariable (&host_framerate);
        Cvar_RegisterVariable (&host_speeds);
+       Cvar_RegisterVariable (&host_sleep);
        Cvar_RegisterVariable (&cl_minfps);
        Cvar_RegisterVariable (&cl_minfps_fade);
        Cvar_RegisterVariable (&cl_minfps_qualitymax);
@@ -912,6 +914,9 @@ void Host_Main(void)
                                Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
                                                        pass1+pass2+pass3, pass1, pass2, pass3);
                        }
+                       wait = bound(0, host_sleep.value * 1000, 100000);
+                       if (wait >= 1)
+                               Sys_Sleep((int)wait);
                }
 
                // if there is some time remaining from this frame, reset the timers