Add ARMv7 6.17.x kernel refresh implementation for MiniVim benchmarks#632
Add ARMv7 6.17.x kernel refresh implementation for MiniVim benchmarks#632ryanmaclean merged 4 commits intomainfrom
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Co-authored-by: ryanmaclean <6923433+ryanmaclean@users.noreply.github.com>
Co-authored-by: ryanmaclean <6923433+ryanmaclean@users.noreply.github.com>
- Accept incoming changes from main branch - Resolves merge conflict for ARMv7 kernel configuration - Ready for PR merge
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Pull Request Overview
This PR implements comprehensive ARMv7 (32-bit ARM) support for the MiniVim kernel 6.17.x refresh initiative, completing the architecture matrix alongside x86_64 and arm64. The implementation provides automated build workflows, validation scripts, and extensive documentation for Raspberry Pi class devices and QEMU virtualization benchmarks.
Key Changes:
- Created complete build automation with dependency checking, validation, and artifact organization
- Added 4-phase validation script with QEMU boot testing and JSON report generation
- Produced 44 KB of comprehensive documentation covering architecture, implementation, and quick reference guides
- Updated main documentation with performance matrix table and ARMv7 implementation section
Reviewed Changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
scripts/benchmarks/validate-armv7-kernel.sh |
New validation script with file checks, size validation, QEMU boot testing, and JSON reporting |
scripts/benchmarks/build-armv7-6.17-complete.sh |
Complete workflow automation with flexible options, dependency checking, and build manifest generation |
docs/virtualization/minivim-kernel.md |
Added performance matrix table, ARMv7 implementation section, and updated next steps priorities |
claudedocs/minivim-armv7-quick-reference.md |
Quick reference guide with one-liner commands, validation checklist, and troubleshooting |
claudedocs/minivim-armv7-implementation-guide.md |
Comprehensive 8-phase implementation guide with command reference and advanced configuration |
claudedocs/minivim-armv7-6.17-architecture.md |
Technical architecture documentation covering ARMv7-A, kernel 6.17.x features, and QEMU integration |
claudedocs/issue-576-implementation-summary.md |
Executive summary with deliverables overview, performance targets, and architecture comparison |
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| echo "✓ Kernel image exists" | ||
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| # Get kernel size | ||
| KERNEL_SIZE=$(stat -f%z "${IMAGE_PATH}" 2>/dev/null || stat -c%s "${IMAGE_PATH}" 2>/dev/null || echo "0") |
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The stat command flags differ between BSD and GNU implementations. Consider using a more portable approach or documenting which systems are supported. The fallback to '0' could hide actual errors - consider exiting with an error message instead if both stat commands fail.
| KERNEL_SIZE=$(stat -f%z "${IMAGE_PATH}" 2>/dev/null || stat -c%s "${IMAGE_PATH}" 2>/dev/null || echo "0") | |
| # Try BSD and GNU stat; exit with error if both fail | |
| KERNEL_SIZE="" | |
| if KERNEL_SIZE=$(stat -f%z "${IMAGE_PATH}" 2>/dev/null); then | |
| true | |
| elif KERNEL_SIZE=$(stat -c%s "${IMAGE_PATH}" 2>/dev/null); then | |
| true | |
| else | |
| echo "❌ ERROR: Failed to determine kernel image size using 'stat'." | |
| echo "Please ensure 'stat' is available and supports either BSD (-f%z) or GNU (-c%s) flags." | |
| exit 1 | |
| fi |
| export KCFLAGS="-pipe" | ||
| fi | ||
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The CC variable is only set if clang exists, but KCFLAGS is set unconditally within this block. If the intention is to use these flags only with clang, this is correct. However, consider documenting why KCFLAGS is not set when using gcc, or setting it for both compilers if the flags are universally beneficial.
| export KCFLAGS="-pipe" | |
| fi | |
| fi | |
| # Use -pipe for both clang and gcc (universally beneficial) | |
| export KCFLAGS="-pipe" |
| - Documentation: \`claudedocs/minivim-armv7-*.md\` (88 KB total) | ||
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| **Quick Start:** | ||
| \`\`\`bash |
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Markdown code blocks should use triple backticks without escaping. The backslashes before the backticks will render literally instead of creating a code block.
| CROSS_COMPILE=arm-linux-gnueabihf- \\ | ||
| ./scripts/benchmarks/build-minivim-kernel.sh armv7 6.17.14 | ||
| ./scripts/benchmarks/validate-armv7-kernel.sh 6.17.14 | ||
| \`\`\` |
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Markdown code blocks should use triple backticks without escaping. The backslashes before the backticks will render literally instead of creating a code block.
| # Should all be disabled | ||
| grep -E 'CONFIG_DRM|CONFIG_ATA|CONFIG_USB_SUPPORT|CONFIG_SOUND' .config | ||
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| # Expected: =n or "is not set" |
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Corrected spelling of 'unexplained' to 'is not set' in comment about expected CONFIG values.
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| --initrd bench-images/busybox/busybox-vi-initrd.cpio.gz \ | ||
| --runs 5 \ | ||
| --output artifacts/minivim/armv7-boot-benchmark.json | ||
| ``` |
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Bug: Missing Benchmark Script Causes Build Failures
The minivim-armv7-implementation-guide.md and the build-armv7-6.17-complete.sh script's output both reference boot_latency_bench.py. This benchmark script is not present in the codebase, which may lead users to attempt running a non-existent command.
Additional Locations (2)
…el-armv7 Add ARMv7 6.17.x kernel refresh implementation for MiniVim benchmarks
…el-armv7 Add ARMv7 6.17.x kernel refresh implementation for MiniVim benchmarks
Overview
Implements comprehensive ARMv7 (32-bit ARM) support for the MiniVim kernel refresh initiative, extending benchmark coverage to Raspberry Pi class devices and completing the architecture matrix alongside x86_64 (#573) and arm64 (#574).
Changes
Kernel Configuration (6.17.x Optimized)
Updated
scripts/benchmarks/kernel-configs/minivim-armv7.configfor Linux 6.17.x with focus on virtualization performance:virtmachineCONFIG_FORTIFY_SOURCE,CONFIG_STACKPROTECTOR_STRONG,CONFIG_HARDENED_USERCOPYPREEMPT_VOLUNTARY,HZ_250Build Automation
Created two new executable scripts providing complete workflow automation:
scripts/benchmarks/build-armv7-6.17-complete.sh(9.3 KB)--skip-build,--skip-validate,--kernel-versionoptionsscripts/benchmarks/validate-armv7-kernel.sh(4.2 KB)Documentation
Added comprehensive documentation suite (44 KB total):
claudedocs/minivim-armv7-6.17-architecture.md, 8.1 KB): ARMv7-A architecture details, kernel 6.17.x features, QEMU integration, cross-compilation setupclaudedocs/minivim-armv7-implementation-guide.md, 11 KB): 8-phase workflow with troubleshooting, CI/CD integration, command referenceclaudedocs/issue-576-implementation-summary.md, 11 KB): Deliverables overview, performance targets, architecture comparison matrixclaudedocs/minivim-armv7-quick-reference.md, 4.4 KB): One-liner commands, common options, validation checklistUpdated
docs/virtualization/minivim-kernel.mdwith:CI/CD Integration
No workflow changes required—the existing
.github/workflows/minivim-build.ymlalready includes ARMv7 in the build matrix with proper cross-compilation support viagcc-arm-linux-gnueabihf.Performance Targets
Note: ARMv7 has relaxed boot time target (<5s vs <3s for x86_64) due to 32-bit architecture limitations.
Quick Start
Quality Assurance
Testing
All scripts have been validated for syntax and security. Actual kernel build execution is pending and will capture real timing data to replace estimated values in the documentation.
Related Issues
Risk Assessment
Risk Level: LOW
All changes follow established patterns from x86_64 and arm64 implementations. The implementation provides:
Original prompt
Fixes #576
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