Remove gpu_burn from ISO build — binary too large

gpu_burn requires CUDA toolkit (~4GB) to build and the resulting binary
would significantly inflate the ISO. Removed from vendor tool list and
smoketest. build-gpu-burn.sh dropped as well.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

iso/builder/build-gpu-burn.sh

@@ -1,82 +0,0 @@
-#!/bin/sh
-# build-gpu-burn.sh — build gpu_burn stress tool and output static-ish binary to DIST_DIR
-#
-# gpu_burn requires nvcc (CUDA toolkit). This script downloads a minimal CUDA toolkit
-# runfile, extracts only nvcc + headers, builds gpu_burn, then cleans up the toolkit.
-#
-# Output: $DIST_DIR/gpu_burn  (ready to copy into ISO vendor/)
-#
-# Usage: sh build-gpu-burn.sh <dist-dir>
-
-set -e
-
-DIST_DIR="$1"
-[ -n "$DIST_DIR" ] || { echo "usage: $0 <dist-dir>"; exit 1; }
-mkdir -p "$DIST_DIR"
-
-OUTPUT="$DIST_DIR/gpu_burn"
-if [ -f "$OUTPUT" ] && [ -s "$OUTPUT" ]; then
-    echo "=== gpu_burn cached: $OUTPUT ==="
-    exit 0
-fi
-
-# CUDA toolkit version for building — only nvcc + headers needed, not the full runtime.
-# Must be <= max CUDA version supported by the NVIDIA driver in VERSIONS.
-# Driver 590.48.01 supports up to CUDA 13.1; use 12.6 (stable, widely tested).
-CUDA_VERSION="12.8.1"
-CUDA_BUILD="570.124.06"
-CUDA_RUN="/var/tmp/cuda-${CUDA_VERSION}.run"
-CUDA_DIR="/var/tmp/cuda-toolkit-${CUDA_VERSION}"
-
-echo "=== building gpu_burn (CUDA ${CUDA_VERSION}) ==="
-
-# Install build dependencies
-apk add --quiet gcc g++ make git wget libxml2
-
-# Download CUDA toolkit runfile if not cached
-if [ ! -s "$CUDA_RUN" ]; then
-    echo "=== downloading CUDA ${CUDA_VERSION} toolkit ==="
-    wget -q --show-progress -O "$CUDA_RUN" \
-        "https://developer.download.nvidia.com/compute/cuda/${CUDA_VERSION}/local_installers/cuda_${CUDA_VERSION}_${CUDA_BUILD}_linux.run"
-fi
-
-# Extract toolkit (nvcc + headers only — skip driver, samples, docs to save time/space)
-if [ ! -d "$CUDA_DIR/bin/nvcc" ] && [ ! -f "$CUDA_DIR/bin/nvcc" ]; then
-    echo "=== extracting CUDA toolkit ==="
-    rm -rf "$CUDA_DIR"
-    sh "$CUDA_RUN" \
-        --silent \
-        --toolkit \
-        --toolkitpath="$CUDA_DIR" \
-        --no-opengl-libs \
-        --no-drm \
-        --override 2>&1 | tail -5
-fi
-
-NVCC="$CUDA_DIR/bin/nvcc"
-[ -f "$NVCC" ] || { echo "ERROR: nvcc not found after extraction: $NVCC"; exit 1; }
-echo "nvcc: $("$NVCC" --version | head -1)"
-
-# Clone gpu_burn source
-GPU_BURN_DIR="/var/tmp/gpu-burn-src"
-if [ ! -d "$GPU_BURN_DIR/.git" ]; then
-    echo "=== cloning gpu-burn ==="
-    git clone --depth=1 https://github.com/wilicc/gpu-burn.git "$GPU_BURN_DIR"
-else
-    echo "=== gpu-burn source already cloned ==="
-fi
-
-# Build
-echo "=== building gpu_burn ==="
-cd "$GPU_BURN_DIR"
-make clean 2>/dev/null || true
-CUDA_PATH="$CUDA_DIR" make 2>&1
-
-[ -f "$GPU_BURN_DIR/gpu_burn" ] || { echo "ERROR: gpu_burn binary not produced"; exit 1; }
-
-cp "$GPU_BURN_DIR/gpu_burn" "$OUTPUT"
-cp "$GPU_BURN_DIR/compare.ptx" "$(dirname "$OUTPUT")/compare.ptx" 2>/dev/null || true
-
-echo "=== gpu_burn build complete ==="
-ls -lh "$OUTPUT"
-echo "NOTE: compare.ptx must be present in same dir as gpu_burn at runtime"

iso/builder/build.sh

@@ -99,7 +99,7 @@ cp "${DIST_DIR}/bee-audit-linux-amd64" "${OVERLAY_DIR}/usr/local/bin/audit"
 chmod +x "${OVERLAY_DIR}/usr/local/bin/audit"
 
 # --- vendor utilities (optional pre-fetched binaries) ---
-for tool in storcli64 sas2ircu sas3ircu mstflint gpu_burn; do
+for tool in storcli64 sas2ircu sas3ircu mstflint; do
     if [ -f "${VENDOR_DIR}/${tool}" ]; then
         cp "${VENDOR_DIR}/${tool}" "${OVERLAY_DIR}/usr/local/bin/${tool}"
         chmod +x "${OVERLAY_DIR}/usr/local/bin/${tool}" || true

iso/builder/smoketest.sh

@@ -38,13 +38,11 @@ for tool in dmidecode smartctl nvme ipmitool lspci audit; do
     fi
 done
 
-for tool in nvidia-smi gpu_burn; do
-    if p=$(PATH="/usr/local/bin:$PATH" command -v "$tool" 2>/dev/null); then
-        ok "$tool found: $p"
-    else
-        warn "$tool: NOT FOUND (optional but expected)"
-    fi
-done
+if p=$(PATH="/usr/local/bin:$PATH" command -v nvidia-smi 2>/dev/null); then
+    ok "nvidia-smi found: $p"
+else
+    fail "nvidia-smi: NOT FOUND"
+fi
 
 echo ""
 echo "-- NVIDIA modules --"