Replace hardcoded values with named constants for better maintainability:
- ELO_MAX_CPU_NS = 100000.0 (100 microseconds)
- ELO_MAX_PAGE_FAULTS = 1000.0
- ELO_MAX_BYTES_LIVE = 100000000.0 (100 MB)
These constants define the normalization range for ELO score computation.
Moving them to file scope makes them easier to tune and document.
Performance: No change (70.1M ops/s average)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Add centralized debug control system that allows enabling all debug
modules at once, while maintaining backwards compatibility with
individual module ENVs.
New file: core/hakmem_debug_master.h
- HAKMEM_DEBUG_ALL=1: Enable all debug modules
- HAKMEM_DEBUG_LEVEL=N: Set debug level (0=off, 1=critical, 2=normal, 3=verbose)
- HAKMEM_QUIET=1: Suppress all debug (highest priority)
- hak_debug_check(): Check if module should enable debug
- hak_is_quiet(): Quick check for quiet mode
Priority order:
1. HAKMEM_QUIET=1 → suppress all
2. Specific module ENV (e.g., HAKMEM_SFC_DEBUG=1)
3. HAKMEM_DEBUG_ALL=1
4. HAKMEM_DEBUG_LEVEL >= threshold
Updated files:
- core/hakmem_elo.c: Use hak_is_quiet() instead of local implementation
- core/hakmem_shared_pool.c: Use hak_debug_check() for lock stats
Performance: No regression (71.5M ops/s maintained)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Critical hot path fix: hakmem_elo.c was calling getenv("HAKMEM_QUIET")
10+ times inside loops, causing 50-100μs overhead per iteration.
Fix: Cache the flag in a static variable with lazy initialization.
- Added is_quiet() helper function with __builtin_expect optimization
- Replaced all 10 inline getenv() calls with is_quiet()
- First call initializes, subsequent calls are just a branch
This is part of the ENV variable cleanup effort identified by the survey:
- Total ENV variables: 228 (target: ~80)
- getenv() calls in hot paths: CRITICAL issue
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
