Add multilingual language and systems learning tracks

en/expanded-30-3/lesson-3/lesson.html

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+<!doctype html><html lang="en"><meta charset="utf-8"><title>Synchronization and buffer ownership</title><h1>Synchronization and buffer ownership</h1><p>15-minute session: read for 3 minutes, trace for 3, experiment for 7, and complete the check for 2. Spend longer whenever you need.</p><p>Submitting a GPU job may return before execution finishes. Reusing or freeing its buffers too early can corrupt results. Model allocated, uploaded, submitted, completed, and released states. Require completion before reuse. A barrier has a defined scope; a workgroup barrier is not automatically synchronization between every workgroup or with the host.</p><p><strong>Practice and evidence:</strong> Predict the example or draw its state transitions. Change one assumption, test the boundary, and record the actual result. Explain what this small model does not establish about a production system.</p><pre><code class="language-python">state=&quot;submitted&quot;
+def can_release(state): return state==&quot;completed&quot;
+assert not can_release(state)
+state=&quot;completed&quot;
+assert can_release(state)
+print(&quot;Passed&quot;)
+</code></pre><p><strong>Expected result:</strong> <code>Passed</code></p><h3>Practice and evidence</h3><p>Keep three notes: your prediction, the actual result, and why they match or differ. The completion check grades understanding; the practice task builds skill.</p><p><a href="https://git.agilaos.com/matt/open_agx">Language reference: git.agilaos.com</a></p><p><a href="https://docs.nvidia.com/cuda/cuda-c-best-practices-guide/">Language reference: docs.nvidia.com</a></p></html>

en/expanded-30-3/lesson-3/main.py

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+state="submitted"
+def can_release(state): return state=="completed"
+assert not can_release(state)
+state="completed"
+assert can_release(state)
+print("Passed")