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Don't wake up Voodoo FIFO thread on every write, instead add a delay. This prevents the situation where it is woken up for every single access. Major speedup on many 3DFX games.

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This commit is contained in:
SarahW 2016-12-12 21:12:35 +00:00
commit 6ddc017987
1 changed files with 33 additions and 5 deletions
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38
src/vid_voodoo.c
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@ -370,7 +370,9 @@ typedef struct voodoo_t
int buffer_cutoff;
int read_time, write_time, burst_time;
int wake_timer;
uint16_t thefilter[1024][1024]; // pixel filter, feeding from one or two
uint16_t thefilterg[1024][1024]; // for green
@ -5467,8 +5469,32 @@ static void voodoo_tex_writel(uint32_t addr, uint32_t val, void *p)
*(uint32_t *)(&voodoo->tex_mem[tmu][addr & voodoo->texture_mask]) = val;
}
#define WAKE_DELAY (TIMER_USEC * 100)
static inline void wake_fifo_thread(voodoo_t *voodoo)
{
if (!voodoo->wake_timer)
{
/*Don't wake FIFO thread immediately - if we do that it will probably
process one word and go back to sleep, requiring it to be woken on
almost every write. Instead, wait a short while so that the CPU
emulation writes more data so we have more batched-up work.*/
timer_process();
voodoo->wake_timer = WAKE_DELAY;
timer_update_outstanding();
}
}
static inline void wake_fifo_thread_now(voodoo_t *voodoo)
{
thread_set_event(voodoo->wake_fifo_thread); /*Wake up FIFO thread if moving from idle*/
}
static void voodoo_wake_timer(void *p)
{
voodoo_t *voodoo = (voodoo_t *)p;
voodoo->wake_timer = 0;
thread_set_event(voodoo->wake_fifo_thread); /*Wake up FIFO thread if moving from idle*/
}
@ -5508,7 +5534,7 @@ static uint16_t voodoo_readw(uint32_t addr, void *p)
voodoo->flush = 1;
while (!FIFO_EMPTY)
{
wake_fifo_thread(voodoo);
wake_fifo_thread_now(voodoo);
thread_wait_event(voodoo->fifo_not_full_event, 1);
}
wait_for_render_thread_idle(voodoo);
@ -5538,7 +5564,7 @@ static uint32_t voodoo_readl(uint32_t addr, void *p)
voodoo->flush = 1;
while (!FIFO_EMPTY)
{
wake_fifo_thread(voodoo);
wake_fifo_thread_now(voodoo);
thread_wait_event(voodoo->fifo_not_full_event, 1);
}
wait_for_render_thread_idle(voodoo);
@ -5568,7 +5594,7 @@ static uint32_t voodoo_readl(uint32_t addr, void *p)
voodoo->flush = 1;
while (!FIFO_EMPTY)
{
wake_fifo_thread(voodoo);
wake_fifo_thread_now(voodoo);
thread_wait_event(voodoo->fifo_not_full_event, 1);
}
wait_for_render_thread_idle(voodoo);
@ -5729,7 +5755,7 @@ static void voodoo_writel(uint32_t addr, uint32_t val, void *p)
*(uint32_t *)&voodoo->fb_mem[(voodoo->cmdfifo_base + (addr & 0x3fffc)) & voodoo->fb_mask] = val;
voodoo->cmdfifo_depth_wr++;
if ((voodoo->cmdfifo_depth_wr - voodoo->cmdfifo_depth_rd) < 20)
thread_set_event(voodoo->wake_fifo_thread);
wake_fifo_thread(voodoo);
}
else switch (addr & 0x3fc)
{
@ -6662,6 +6688,8 @@ void *voodoo_init()
voodoo->render_thread[0] = thread_create(render_thread_1, voodoo);
if (voodoo->render_threads == 2)
voodoo->render_thread[1] = thread_create(render_thread_2, voodoo);
timer_add(voodoo_wake_timer, &voodoo->wake_timer, &voodoo->wake_timer, (void *)voodoo);
for (c = 0; c < 0x100; c++)
{