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Force the dedicated server to use nanosleep() based waits.

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It's an often reported, that the q2ded dedicated server consumes huges
amounts of CPU time. That's because users don't know that `busywait`
must be set to `0`. Since there's no point in using busywaits in the
dedicated server (the network jitter is always bigger than the
jitter caused by nanosleep() and equivalents), just force q2ded to
use nanosleep().
This commit is contained in:
Yamagi 2020-06-26 12:46:40 +02:00
parent ea0c0c04a2
commit 0491b54284
1 changed files with 8 additions and 10 deletions
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18
src/common/frame.c
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@ -34,7 +34,6 @@ cvar_t *timescale;
cvar_t *fixedtime;
cvar_t *cl_maxfps;
cvar_t *dedicated;
cvar_t *busywait;
extern cvar_t *logfile_active;
extern jmp_buf abortframe; /* an ERR_DROP occured, exit the entire frame */
@ -42,6 +41,7 @@ extern zhead_t z_chain;
#ifndef DEDICATED_ONLY
FILE *log_stats_file;
cvar_t *busywait;
cvar_t *cl_async;
cvar_t *cl_timedemo;
cvar_t *vid_maxfps;
@ -117,12 +117,6 @@ Qcommon_Buildstring(void)
printf("Architecture: %s\n", YQ2ARCH);
}
#ifndef DEDICATED_ONLY
#define FRAMEDELAY 5
#else
#define FRAMEDELAY 850
#endif
void
Qcommon_Mainloop(void)
{
@ -132,6 +126,7 @@ Qcommon_Mainloop(void)
/* The mainloop. The legend. */
while (1)
{
#ifndef DEDICATED_ONLY
// Throttle the game a little bit.
if (busywait->value)
{
@ -150,7 +145,7 @@ Qcommon_Mainloop(void)
asm("yield");
#endif
if (Sys_Microseconds() - spintime >= FRAMEDELAY)
if (Sys_Microseconds() - spintime >= 5000)
{
break;
}
@ -158,8 +153,11 @@ Qcommon_Mainloop(void)
}
else
{
Sys_Nanosleep(FRAMEDELAY * 1000);
Sys_Nanosleep(5000);
}
#else
Sys_Nanosleep(850000);
#endif
newtime = Sys_Microseconds();
Qcommon_Frame(newtime - oldtime);
@ -319,9 +317,9 @@ Qcommon_Init(int argc, char **argv)
char *s;
s = va("%s %s %s %s", YQ2VERSION, YQ2ARCH, BUILD_DATE, YQ2OSTYPE);
Cvar_Get("version", s, CVAR_SERVERINFO | CVAR_NOSET);
busywait = Cvar_Get("busywait", "1", CVAR_ARCHIVE);
#ifndef DEDICATED_ONLY
busywait = Cvar_Get("busywait", "1", CVAR_ARCHIVE);
cl_async = Cvar_Get("cl_async", "1", CVAR_ARCHIVE);
cl_timedemo = Cvar_Get("timedemo", "0", 0);
dedicated = Cvar_Get("dedicated", "0", CVAR_NOSET);