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Add profiling for VRAM, FPS ratios, and instancing analysis

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Per-second frame log reports fps/ms, visible/total object & triangle
ratios, VRAM breakdown (VBO+EBO), model count, and pending uploads.

Upload-complete log includes per-model VBO/EBO MB and scene total VRAM.

Streamer runs an instancing analysis keyed on geom.id(): total shapes,
unique representations, dedup ratio, theoretical VBO/EBO/SSBO sizes if
instanced, potential savings, and top-5 most-duplicated representations.
Used to validate whether GPU instancing is worth the architectural
rewrite for a given dataset.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-04-12 19:01:43 +10:00
parent 1dace18d26
commit 36fa53122a
2 changed files with 139 additions and 5 deletions
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src/ifcviewer/ViewportWindow.cpp
+36 -5
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@@ -592,7 +592,19 @@ void ViewportWindow::processPendingUploads() {
model_bvhs_[pu.model_id] = std::move(pu.bvh_set);
}
qDebug("Progressive upload complete: model %u", pu.model_id);
size_t total_vbo = 0, total_ebo = 0;
for (const auto& [mid, mg] : models_gpu_) {
total_vbo += mg.vbo_capacity;
total_ebo += mg.ebo_capacity;
}
qDebug("Progressive upload complete: model %u (this: vbo %.1f MB + ebo %.1f MB, "
"%u objects, %u triangles) scene total vram %.1f MB",
pu.model_id,
mgpu.vbo_capacity / (1024.0 * 1024.0),
mgpu.ebo_capacity / (1024.0 * 1024.0),
static_cast<uint32_t>(mgpu.draw_info.size()),
mgpu.total_triangles,
(total_vbo + total_ebo) / (1024.0 * 1024.0));
pending_uploads_.pop_front();
}
@@ -953,12 +965,17 @@ void ViewportWindow::render() {
accumulated_time_ = 0.0f;
uint32_t total_obj = 0, total_tri = 0, vis_obj = 0;
size_t total_vram = 0, total_vbo = 0, total_ebo = 0;
size_t num_models = 0, num_hidden = 0;
for (const auto& [mid, m] : models_gpu_) {
if (!m.hidden) {
total_obj += static_cast<uint32_t>(m.draw_info.size());
total_tri += m.total_triangles;
}
num_models++;
if (m.hidden) { num_hidden++; continue; }
total_obj += static_cast<uint32_t>(m.draw_info.size());
total_tri += m.total_triangles;
total_vbo += m.vbo_capacity;
total_ebo += m.ebo_capacity;
}
total_vram = total_vbo + total_ebo;
for (const auto& cmd : frame_draw_cmds_) {
vis_obj += static_cast<uint32_t>(cmd.counts.size());
}
@@ -971,6 +988,20 @@ void ViewportWindow::render() {
stats.total_triangles = total_tri;
stats.visible_triangles = visible_triangles_;
emit frameStatsUpdated(stats);
double vis_obj_pct = total_obj > 0 ? 100.0 * vis_obj / total_obj : 0.0;
double vis_tri_pct = total_tri > 0 ? 100.0 * visible_triangles_ / total_tri : 0.0;
qDebug("[frame] %.1f fps %.2f ms obj %u/%u (%.1f%%) tri %u/%u (%.1f%%) "
"vram %.1f MB (vbo %.1f + ebo %.1f) models %zu (%zu hidden) draws %zu pending_uploads %zu",
last_fps_, 1000.0f / last_fps_,
vis_obj, total_obj, vis_obj_pct,
visible_triangles_, total_tri, vis_tri_pct,
total_vram / (1024.0 * 1024.0),
total_vbo / (1024.0 * 1024.0),
total_ebo / (1024.0 * 1024.0),
num_models, num_hidden,
frame_draw_cmds_.size(),
pending_uploads_.size());
}
}