count the cores the cgroup allows, not the host's

app.py

@@ -51,6 +51,23 @@ os.environ["CMF_GPU"] = "0"
 _model: str | None = None
 
 
+def cores() -> str:
+    """How many cores this container may actually use.
+
+    `os.cpu_count()` reports the HOST's, which on a Space is wildly wrong:
+    a cpu-basic container saw 16 while its quota was 2. The truth is the
+    cgroup v2 quota — "<quota> <period>" in microseconds, or "max" when
+    uncapped.
+    """
+    try:
+        q, p = Path("/sys/fs/cgroup/cpu.max").read_text().split()
+        if q != "max":
+            return f"{int(q) / int(p):g} vCPU"
+    except Exception:  # noqa: BLE001 — cgroup v1, macOS, anything else
+        pass
+    return f"{os.cpu_count()} vCPU"
+
+
 def binary() -> str:
     if not BIN.exists():
         BIN.parent.mkdir(parents=True, exist_ok=True)
@@ -151,7 +168,7 @@ def animate(prompt, width, height, frames, steps, progress=gr.Progress()):
 
     wav = out.with_suffix(".wav")
     gif = avi_to_gif(out, WORK / f"{tag}.gif")
-    log += f"\n{time.time() - t0:.0f} s on {os.cpu_count()} vCPU.\n"
+    log += f"\n{time.time() - t0:.0f} s on {cores()}.\n"
     yield str(gif) if gif else None, str(wav) if wav.exists() else None, str(out), log