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gpu: Be more aggressive about cache gc

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Count dead pixels in textures (ie the number of pixels in GPU
textures that are no longer backed by an alive GdkTexture object),
and when the there's too many, do a gc before rendering the next
frame.
This commit is contained in:
Matthias Clasen 2024-01-28 10:45:59 -05:00
parent ee52e98b7d
commit 1bac8b439a
1 changed files with 25 additions and 7 deletions
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32
gsk/gpu/gskgpudevice.c
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@ -46,6 +46,8 @@ struct _GskGpuDevicePrivate
GHashTable *glyph_cache;
GskGpuCachedAtlas *current_atlas;
/* atomic */ gsize dead_texture_pixels;
};
G_DEFINE_TYPE_WITH_PRIVATE (GskGpuDevice, gsk_gpu_device, G_TYPE_OBJECT)
@ -73,7 +75,7 @@ struct _GskGpuCached
gint64 timestamp;
gboolean stale;
guint pixels; /* For glyphs, pixels. For atlases, dead pixels */
guint pixels; /* For glyphs and textures, pixels. For atlases, dead pixels */
};
static inline void
@ -245,6 +247,8 @@ struct _GskGpuCachedTexture
* weak ref.
*/
gsize *dead_pixels_counter;
GdkTexture *texture;
GskGpuImage *image;
};
@ -304,16 +308,19 @@ static const GskGpuCachedClass GSK_GPU_CACHED_TEXTURE_CLASS =
gsk_gpu_cached_texture_should_collect
};
/* Note: this function can run in an arbitrary thread, so it can
* only access things atomically
*/
static void
gsk_gpu_cached_texture_destroy_cb (gpointer data)
{
GskGpuCachedTexture *self = data;
if (!gsk_gpu_cached_texture_is_invalid (self))
g_atomic_pointer_add (self->dead_pixels_counter, ((GskGpuCached *) self)->pixels);
if (g_atomic_int_dec_and_test (&self->use_count))
{
g_free (self);
return;
}
g_free (self);
}
static GskGpuCachedTexture *
@ -336,6 +343,8 @@ gsk_gpu_cached_texture_new (GskGpuDevice *device,
self = gsk_gpu_cached_new (device, &GSK_GPU_CACHED_TEXTURE_CLASS, NULL);
self->texture = texture;
self->image = g_object_ref (image);
((GskGpuCached *)self)->pixels = gsk_gpu_image_get_width (image) * gsk_gpu_image_get_height (image);
self->dead_pixels_counter = &priv->dead_texture_pixels;
self->use_count = 2;
if (!gdk_texture_set_render_data (texture, device, self, gsk_gpu_cached_texture_destroy_cb))
@ -497,6 +506,8 @@ gsk_gpu_device_gc (GskGpuDevice *self,
gsk_gpu_cached_free (self, cached);
}
g_atomic_pointer_set (&priv->dead_texture_pixels, 0);
if (GSK_DEBUG_CHECK (GLYPH_CACHE))
print_cache_stats (self);
@ -522,15 +533,22 @@ void
gsk_gpu_device_maybe_gc (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
gsize dead_texture_pixels;
if (priv->cache_timeout < 0)
return;
if (priv->cache_timeout == 0)
dead_texture_pixels = GPOINTER_TO_SIZE (g_atomic_pointer_get (&priv->dead_texture_pixels));
if (priv->cache_timeout == 0 || dead_texture_pixels > 1000000)
{
GSK_DEBUG (GLYPH_CACHE, "Pre-frame GC");
GSK_DEBUG (GLYPH_CACHE, "Pre-frame GC (%lu dead pixels)", dead_texture_pixels);
gsk_gpu_device_gc (self, g_get_monotonic_time ());
}
else
{
GSK_DEBUG (GLYPH_CACHE, "No pre-frame GC (%lu dead pixels)", dead_texture_pixels);
}
}
void