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Attempt to use SCHED_FIFO in KMS.

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This is mostly for testing purposes, to see how much scheduling affects
performance.
This commit is contained in:
Themaister 2012-09-18 21:51:50 +02:00
parent f6af4fc122
commit c309099e79
1 changed files with 35 additions and 0 deletions
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35
gfx/context/drm_egl_ctx.c
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@ -30,6 +30,8 @@
#include <signal.h>
#include <stdint.h>
#include <signal.h>
#include <unistd.h>
#include <sched.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
@ -236,6 +238,37 @@ void gfx_ctx_get_video_size(unsigned *width, unsigned *height)
*height = g_fb_height;
}
static void reschedule_process(void)
{
struct sched_param param = {0};
// All-out real-time. Why not? :D
param.sched_priority = sched_get_priority_max(SCHED_FIFO);
if (sched_setscheduler(0, SCHED_FIFO, &param) < 0)
RARCH_ERR("[KMS/EGL]: Failed to set SCHED_FIFO priority.\n");
int sched = sched_getscheduler(getpid());
const char *scheduler;
switch (sched)
{
case SCHED_OTHER:
scheduler = "SCHED_OTHER";
break;
case SCHED_FIFO:
scheduler = "SCHED_FIFO";
break;
default:
scheduler = "Unrelated";
}
RARCH_LOG("[KMS/EGL]: Current scheduler: %s\n", scheduler);
if (sched == SCHED_FIFO)
RARCH_LOG("[KMS/EGL]: SCHED_FIFO prio: %d\n", param.sched_priority);
}
bool gfx_ctx_init(void)
{
if (g_inited)
@ -244,6 +277,8 @@ bool gfx_ctx_init(void)
return false;
}
reschedule_process();
static const char *modules[] = {
"i915", "radeon", "nouveau", "vmwgfx", "omapdrm", "exynos", NULL
};