mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-30 16:43:00 +00:00
Dion Moult
b7d2b2fa3a
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>
63 lines
3.2 KiB
C++
63 lines
3.2 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef GPUMEMORY_H
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#define GPUMEMORY_H
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#include <cstdint>
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// How much video memory the card has, and how much of it is in use.
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//
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// WebGPU deliberately exposes neither -- `maxBufferSize` reports 1 TB on this
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// stack and is useless as a proxy -- so this goes outside the graphics API.
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// That is legitimate on desktop, where the viewer is a native app, and it is
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// the number every other part of the residency story needs: a gauge to show
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// the user, a budget to keep the pool under, and a pre-flight check that can
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// refuse a model before it wedges the session.
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//
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// Matching the right GPU matters. On a laptop with switchable graphics the
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// obvious sysfs entry is often the *integrated* chip rather than the one wgpu
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// selected -- measured here: /sys/class/drm/card1 reports a 512 MB AMD iGPU
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// while wgpu is running on a 4 GB GeForce. So the query takes the vendor and
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// device ids from WGPUAdapterInfo and matches on them.
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namespace ifcviewer {
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struct GpuMemoryInfo {
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std::uint64_t total_bytes = 0;
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std::uint64_t used_bytes = 0;
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// False when no backend could answer -- an unknown driver, a platform
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// without a query, or a device the probe could not match. Callers must
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// treat that as "unknown" and not as "zero": refusing to load because an
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// unavailable query returned 0 would be worse than not asking.
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bool valid = false;
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std::uint64_t free_bytes() const {
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return total_bytes > used_bytes ? total_bytes - used_bytes : 0;
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}
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};
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// Query the GPU wgpu selected. `vendor_id` / `device_id` come from
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// wgpuAdapterGetInfo. Cheap enough to call once a second; not per frame.
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GpuMemoryInfo queryGpuMemory(std::uint32_t vendor_id, std::uint32_t device_id);
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} // namespace ifcviewer
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#endif
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