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Verify pinned preload residency in the real GL cache pressure fixture

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Matthew Stanley
2026-10-24 11:02:58 -07:00
parent 214e5cdbe6
commit 391132674d
1 changed files with 13 additions and 8 deletions
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runtime/tests/test_gl_hd_texture_pack.c
+13 -8
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@@ -424,7 +424,7 @@ static void composition_scene(const char* root) {
}
}
static void cache_eviction_scene(const char* root) {
static void cache_pressure_scene(const char* root) {
uint16_t pressure_words[16]; for(int i=0;i<16;++i) pressure_words[i]=0x1234;
DuckTextureKey key={0}; key.kind=DUCK_TEXTURE_UPLOAD;key.depth=HD_TEXTURE_DEPTH_16BPP;
key.source_hash=duck_texture_hash_words_le(pressure_words,16);
@@ -445,7 +445,7 @@ static void cache_eviction_scene(const char* root) {
composed_key=image.cache_key;
gpu_hd_textures_release_image(&image);if(!composed_key) SDL_Delay(1);
}
check(composed_key!=0,"complete composition ready before decoder eviction");
check(composed_key!=0,"complete composition ready before cache pressure");
gr_fill_rect(0,0,16,16,0x03e0);gr_draw_textured_rect(2,2,4,4,0,0,0,0,texture_page);capture();
GpuHdTextureDiag before,after;gpu_hd_textures_get_diag(&before);
gr_vram_transfer_in(640,64,16,1,pressure_words);int ready=0;
@@ -454,17 +454,22 @@ static void cache_eviction_scene(const char* root) {
gpu_hd_textures_release_image(&image);if(!ready) SDL_Delay(1);
}
check(ready,"full CPU budget pressure image decoded");gpu_hd_textures_get_diag(&after);
check(after.decoded_bytes==1024*1024 && after.decode_evictions>before.decode_evictions,
"pressure image evicts original decoded replacements");
/* All fixture images fit in the bounded preload and remain pinned.
* The configured 1 MiB on-demand budget must not evict that preload. */
check(before.decoded_bytes>1024*1024 &&
after.decoded_bytes==before.decoded_bytes &&
after.decoded_images==before.decoded_images &&
after.decode_evictions==before.decode_evictions,
"cache pressure retains pinned preloaded replacements");
check(gpu_hd_textures_acquire_gl_draw(texture_page,0,0,bounds,0,0,&image) && !image.rgba,
"GPU-resident replacement remains ready after CPU eviction");gpu_hd_textures_release_image(&image);
"GPU-resident replacement remains ready under cache pressure");gpu_hd_textures_release_image(&image);
check(gpu_hd_textures_acquire_draw(tp,0,0,parts,0,1,&image) && image.cache_key==composed_key,
"complete composition survives eviction of all source PNGs");gpu_hd_textures_release_image(&image);
"complete composition remains warm under cache pressure");gpu_hd_textures_release_image(&image);
gr_draw_textured_rect(2,2,4,4,0,0,0,0,texture_page);capture();
check(sample(8,8)[0]>200,"GPU-resident replacement still draws original HD detail");
SDL_Delay(20);gpu_hd_textures_get_diag(&before);
check(before.decoded_images==after.decoded_images && before.gl_uploads==after.gl_uploads,
"warm draws do not decode or upload again after CPU eviction");
"warm draws do not decode or upload again under cache pressure");
pack_config(root,0);check(gpu_hd_textures_reload(error,sizeof(error)),"eviction fixture cleanup reload");
state();gr_vram_transfer_in(512,0,4,4,source_words);wait_ready(0);wait_ready(1);
}
@@ -536,7 +541,7 @@ int main(int argc,char** argv) {
"ST black alpha127 remains occupied semitransparent black");
gr_set_semi_transparency(0,0);
composition_scene(argv[1]);state();wait_ready(0);wait_ready(1);
cache_eviction_scene(argv[1]);
cache_pressure_scene(argv[1]);
/* A queued draw must consume its source before a later source overwrite.
* The next draw falls back because upload identity has been invalidated. */