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bonsaiviewer: show pool and device VRAM in the performance stats

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FrameStats gains the geometry pool's used/capacity bytes and, on desktop,
the device-wide used/total reported by the driver (NVML via dlopen, or
amdgpu/i915 sysfs, matched to the wgpu adapter's vendor/device id so a
switchable-graphics laptop reports the card wgpu actually picked). The
device query is polled once a second, not per frame. Web has no VRAM
query, so the device figure is omitted there.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-08-23 13:32:59 +10:00
parent 5fa14c3dea
commit b7d2b2fa3a
7 changed files with 313 additions and 3 deletions
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src/bonsaiviewer/MainWindow.cpp
+13 -3
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@@ -555,15 +555,25 @@ void MainWindow::setupLoader() {
connect(viewport_widget_->viewport(), &ViewportWindow::frameStatsUpdated, this,
[this](const ViewportWindow::FrameStats& stats) {
if (!status_perf_label_->isVisible()) return;
status_perf_label_->setText(
QString("%1 fps | %2 ms | %3/%4 obj | %5/%6 tri | %7 draws")
const double mb = 1.0 / (1024.0 * 1024.0);
QString text =
QString("%1 fps | %2 ms | %3/%4 obj | %5/%6 tri | %7 draws | VRAM %8/%9 MB")
.arg(stats.fps, 0, 'f', 1)
.arg(stats.frame_time_ms, 0, 'f', 1)
.arg(stats.visible_objects)
.arg(stats.total_objects)
.arg(stats.visible_triangles)
.arg(stats.total_triangles)
.arg(stats.gl_draw_calls));
.arg(stats.gl_draw_calls)
.arg(double(stats.vram_used_bytes) * mb, 0, 'f', 0)
.arg(double(stats.vram_capacity_bytes) * mb, 0, 'f', 0);
// Device total is only known when a driver backend answered.
if (stats.device_vram_total_bytes > 0) {
text += QString(" | Device %1/%2 MB")
.arg(double(stats.device_vram_used_bytes) * mb, 0, 'f', 0)
.arg(double(stats.device_vram_total_bytes) * mb, 0, 'f', 0);
}
status_perf_label_->setText(text);
});
connect(viewport_widget_->viewport(), &ViewportWindow::objectPicked,
this, [this](uint32_t object_id) {