Add markdown button and make llms.txt available

docs/conf.py

@@ -1,10 +1,13 @@
-# Configuration file for the Sphinx documentation builder.
-#
-# This file only contains a selection of the most common options. For a full
-# list see the documentation:
-# https://www.sphinx-doc.org/en/master/usage/configuration.html
+"""Configuration file for the Sphinx documentation builder."""
+import os
+import re
+from pathlib import Path
+
+html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "instinct.docs.amd.com")
+html_context = {}
+if os.environ.get("READTHEDOCS", "") == "True":
+    html_context["READTHEDOCS"] = True
 
-# configurations for PDF output by Read the Docs
 project = "AMD Instinct Hub"
 html_title = "GPU cluster networking documentation"
 author = "Advanced Micro Devices, Inc."
@@ -19,11 +22,235 @@
 
 html_theme = "rocm_docs_theme"
 html_theme_options = {
-    "flavor": "instinct"
+    "flavor": "instinct",
+    "link_main_doc": True,
+    "use_download_button": True,
 }
 extensions = ["rocm_docs"]
 
 html_static_path = ['_static']
 
+html_extra_path = ["llms.txt"]
+
+EXCLUDED_DIRS = {
+    "_build",
+    "_templates",
+    "_static",
+    ".git",
+    ".venv",
+}
+
+MARKUP_PREFIXES = (
+    ":::",
+    "```{",
+    "```",
+    ":img-top:",
+    ":class",
+    ":link:",
+    ":link-type:",
+    ":shadow:",
+    ":columns:",
+    ":padding:",
+    ":gutter:",
+    ":open:",
+    ":name:",
+    ":header-rows:",
+    ":alt:",
+    "+++",
+    "-->",
+    "{bdg-",
+)
+
+# Matches lines like "align: center", "alt:", "name: foo" (directive options
+# not starting with a colon, common in MyST figure/table fences)
+_BARE_DIRECTIVE_RE = re.compile(r"^[a-z][a-z_-]*:\s*\S*$")
+
+# Matches MyST/RST anchor labels like "(some-label)="
+_ANCHOR_LABEL_RE = re.compile(r"^\(\w[\w-]*\)=$")
+
+# Matches RST section underlines (e.g. "====", "----", "~~~~")
+_RST_UNDERLINE_RE = re.compile(r"^[=\-~^\"\'#*+]{3,}$")
+
+# Matches RST code block directives (e.g. ".. code-block:: cpp", ".. code:: sh")
+_RST_CODE_BLOCK_RE = re.compile(r"^\.\.\s+(code-block|code|sourcecode)::")
+
+# Matches markdown table separator rows (e.g. "|---|---|", "| :--- | ---: |").
+_MD_TABLE_SEP_RE = re.compile(r"^\|[\s|:\-]+\|$")
+
+# Matches RST directives whose indented body should be discarded (e.g. raw HTML).
+_RST_SKIP_BLOCK_RE = re.compile(r"^\.\.\s+raw::")
+
+# Matches HTML tags (e.g. "<div>", "</p>", "<!--") but NOT RST hyperlink URL
+# continuation lines (e.g. "<https://...>`_").  The negative lookahead excludes
+# URL schemes so that multi-line RST inline hyperlinks are preserved.
+_HTML_TAG_RE = re.compile(r"^<(?!https?://|ftp://|mailto:)[a-zA-Z/!]")
+
+# Matches trailing HTML close tags at the end of a prose line
+# (e.g. "Browse blogs.</p>", "See the guide.</li></ul>").
+_TRAILING_HTML_CLOSE_RE = re.compile(r"(</[a-zA-Z]+>)+\s*$")
+
+MIN_PROSE_LINES = 10
+
+
+def should_skip(path: Path) -> bool:
+    return any(part in EXCLUDED_DIRS for part in path.parts)
+
+
+def is_prose_line(line: str) -> bool:
+    stripped = line.strip()
+    if not stripped:
+        return False
+    if stripped.startswith(MARKUP_PREFIXES):
+        return False
+    # Drop bare directive-option lines (e.g. "align: center", "alt:")
+    if _BARE_DIRECTIVE_RE.match(stripped):
+        return False
+    # Drop MyST/RST anchor labels (e.g. "(some-label)=")
+    if _ANCHOR_LABEL_RE.match(stripped):
+        return False
+    # Drop markdown table separator rows (e.g. "|---|---|", "| :--- | ---: |")
+    if _MD_TABLE_SEP_RE.match(stripped):
+        return False
+    # Drop HTML tags (e.g. "<div>", "</p>") but keep RST hyperlink URL
+    # continuation lines (e.g. "<https://rocm.docs.amd.com/...>`_")
+    if _HTML_TAG_RE.match(stripped):
+        return False
+    # Drop RST directives, comments, hyperlink targets, and substitution definitions
+    if stripped.startswith(".."):
+        return False
+    # Drop YAML frontmatter key-value pairs (e.g. "description lang=en": "text")
+    if stripped.startswith('"') and re.match(r'^"[^"]+"\s*:', stripped):
+        return False
+    # Drop RST field list items (e.g. ":type: int") and extended RST meta
+    # options (e.g. ":description lang=en: text"). Excludes inline roles at line
+    # start (e.g. ":cpp:func:`hipMalloc` returns..." or ":ref:`foo <bar>` describes...")
+    # because those are followed by a backtick, not a space or end-of-line.
+    if re.match(r"^:[A-Za-z][A-Za-z0-9_ =-]*:(\s|$)", stripped):
+        return False
+    # Drop RST section underlines (e.g. "====", "----", "~~~~")
+    if _RST_UNDERLINE_RE.match(stripped):
+        return False
+    return True
+
+
+def generate_combined_markdown(app, exception):
+    if exception:
+        return
+
+    docs_root = Path(app.srcdir)
+    output_file = Path(app.outdir) / "llms-full.txt"
+    base_file = docs_root / "llms.txt"
+
+    combined = []
+
+    if base_file.exists():
+        base_text = base_file.read_text(encoding="utf-8").rstrip().rstrip("-").rstrip()
+        combined.append(base_text)
+    else:
+        combined.append("# AMD GPU Cluster Networking")
+
+    all_files = sorted(
+        list(docs_root.rglob("*.md")) + list(docs_root.rglob("*.rst"))
+    )
+
+    for doc_file in all_files:
+        if should_skip(doc_file):
+            continue
+
+        if doc_file == base_file:
+            continue
+
+        try:
+            content = doc_file.read_text(encoding="utf-8")
+        except Exception:
+            continue
+
+        lines = content.splitlines()
+        prose_lines = [line for line in lines if is_prose_line(line)]
+
+        if len(prose_lines) < MIN_PROSE_LINES:
+            continue
+
+        relative = doc_file.relative_to(docs_root)
+        in_backtick_fence = False
+        in_rst_code_block = False
+        in_rst_skip_block = False
+        in_html_comment = False  # inside <!-- ... --> block
+        in_html_open_tag = False  # inside a multi-line HTML opening tag
+        kept = []
+        for line in lines:
+            stripped = line.strip()
+            # Backtick fences (MyST/Markdown)
+            if stripped.startswith("```"):
+                in_backtick_fence = not in_backtick_fence
+                kept.append(line)
+                continue
+            if in_backtick_fence:
+                kept.append(line)
+                continue
+            # HTML comment block (<!-- ... -->): discard all content until -->
+            if in_html_comment:
+                if "-->" in stripped:
+                    in_html_comment = False
+                continue
+            # RST skip block (e.g. .. raw::): discard all indented content
+            if in_rst_skip_block:
+                if not stripped or line[0] in (" ", "\t"):
+                    continue
+                in_rst_skip_block = False
+            # RST code block: exit when a non-blank, non-indented line appears
+            if in_rst_code_block:
+                if not stripped or line[0] in (" ", "\t"):
+                    kept.append(line)
+                    continue
+                in_rst_code_block = False
+            # RST raw block: enter and discard both the directive and its body
+            if _RST_SKIP_BLOCK_RE.match(stripped):
+                in_rst_skip_block = True
+                continue
+            # RST code block: enter on directive line (directive itself is dropped)
+            if _RST_CODE_BLOCK_RE.match(stripped):
+                in_rst_code_block = True
+                continue
+            # HTML comment open (<!-- ... -->): discard opener and enter state
+            if stripped.startswith("<!--"):
+                if "-->" not in stripped:
+                    in_html_comment = True
+                continue
+            # Multi-line HTML opening tag: skip continuation lines until >
+            if in_html_open_tag:
+                if ">" in stripped:
+                    in_html_open_tag = False
+                continue
+            # Detect HTML opening tags that wrap across lines (no > on this line)
+            if _HTML_TAG_RE.match(stripped) and ">" not in stripped:
+                in_html_open_tag = True
+                continue
+            if not stripped:
+                kept.append(line)
+            elif is_prose_line(line):
+                # Strip trailing HTML close tags (e.g. "See the guide.</p>")
+                cleaned = _TRAILING_HTML_CLOSE_RE.sub("", line).rstrip()
+                cleaned_stripped = cleaned.strip()
+                if not cleaned_stripped:
+                    # Entire line was HTML close tags — keep original (shouldn't
+                    # normally reach here since _is_prose_line filters HTML).
+                    kept.append(line)
+                elif re.search(r"\w", cleaned_stripped):
+                    # Line has real word content after stripping close tags.
+                    kept.append(cleaned)
+                # else: only punctuation remains (e.g. bare ".") — discard.
+        cleaned = "\n".join(kept)
+
+        combined.append(f"\n\n---\n\n# {relative}\n")
+        combined.append(cleaned.strip())
+
+    output_file.write_text(
+        "\n".join(combined) + "\n",
+        encoding="utf-8",
+    )
+
+
 def setup(app):
-    app.add_css_file('css/custom.css')
+    app.add_css_file('css/custom.css')
+    app.connect("build-finished", generate_combined_markdown)

docs/llms.txt

@@ -0,0 +1,19 @@
+# AMD GPU Cluster Networking
+
+> Configure and validate high-performance network infrastructure for AMD Instinct GPU clusters. Covers single-node NIC and PCIe validation, multi-node RDMA/RoCE configuration, ROCm-aware MPI with UCX and libfabric, RCCL collective benchmarking, and multi-node LLM inference load balancing.
+
+## How to
+
+- [GPU-enabled MPI](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/gpu-enabled-mpi.html): Configure ROCm-aware Open MPI with UCX for InfiniBand and RoCE, set up libfabric for Slingshot, enable UCC for GPU-aware collective operations, and run OSU Micro Benchmarks to validate MPI bandwidth and latency.
+- [Single-node network configuration](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/single-node-config.html): Validate PCIe link speed and width for GPU-to-NIC connectivity, tune Mellanox and Broadcom NIC settings, run RVS PCIe tests, and benchmark GPU memory bandwidth with TransferBench and ROCm Bandwidth Test.
+- [Multi-node network configuration](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/multi-node-config.html): Run OFED perftest benchmarks for host-to-host and device-to-device RDMA, validate multi-threaded throughput, configure RCCL environment variables for multi-node collective operations, and benchmark with OSU Micro Benchmarks.
+- [Multi-node inference with load balancing](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/multi-node-inference-lb.html): Deploy multi-node LLM inference clusters using vLLM or SGLang, configure LiteLLM or Nginx as load-balancing gateways, set up Prometheus and Grafana for monitoring, and run load tests with k6 or Apache Bench.
+- [RoCE network configuration](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/roce-network-config.html): Configure RoCE NICs and switches for GPU cluster networks, prevent ARP flux and routing isolation issues, and apply recommended NIC and switch settings for RDMA over Converged Ethernet.
+- [Troubleshooting](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/how-to/troubleshooting.html): Diagnose RCCL and RDMA errors using error reference tables, resolve network connectivity, firewall, ACS, NUMA balancing, and LD_LIBRARY_PATH issues, and fix MPI interface exclusion and BIOS misconfiguration problems.
+
+## Reference
+
+- [Hardware support](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/reference/hardware-support.html): GPU architecture ROCm version requirements (MI355X/MI350X require ROCm 7.0.1+, MI325X requires 6.3.1+) and NIC compatibility matrices per AMD Instinct GPU generation.
+- [Cluster design](https://instinct.docs.amd.com/projects/gpu-cluster-networking/en/latest/reference/cluster-design.html): Reference cluster network design guides and topology PDFs for AMD Instinct GPU deployments ranging from 128 to 8192 GPUs using leaf-spine architectures.
+
+---