Kernel (C++17 freestanding):
- New Analytics Engine (kernel/cpp/cpp_analytics.cpp): templated rolling
time-series (TimeSeries<N>) sampling four live channels -- CPU load %,
memory %, kernel-heap %, network pkt/interval -- with windowed statistics
(min/max/mean/stddev) computed in pure integer math (kernel is -mno-sse, so
no FP; stddev uses a Newton integer isqrt). Demonstrates virtual dispatch
via an Observer pattern (IAnalyticsObserver + a ThresholdAlarmObserver that
counts breaches) and RAII singletons.
- Extended cpp_containers.hpp with Optional<T>, Pair<A,B>, and the kmin/kmax/
kclamp/kswap algorithms.
- Full C fallback (cpp_fallback.c) so the engine is functionally identical on
aarch64/armv8i, which don't build the .cpp path.
- Wired cpp_analytics_init() into boot [8/14]; seeds a few samples so graphs
are populated immediately.
GUI:
- New "Analytics" desktop app (gui/gui_apps.c): a 2x2 grid of live line-charts
backed by the C++ engine, each with gridlines, a soft baseline fill, and
min/avg/max(/stddev) overlays; click a panel to focus one channel full-size,
click again to return. Throttled to ~2 Hz sampling off the compositor's
repaint cadence. Registered on the desktop and in the start menu.
Userland: new `cppstat [samples]` applet dumps the engine's per-channel stats
and Observer breach counters.
Verified in QEMU (x86_64): boots clean on x86_64/aarch64/armv8i; `cppstat`
prints live stats (CPU 6%, Mem 7%, Heap 22%, computed min/avg/max/stddev,
Observer breaches); the GUI Analytics window renders all four graphs with the
Kernel Heap curve visibly climbing 22->55% as windows open, compositor steady
at ~53 FPS.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
- Implement modern freestanding C++17 containers (Vector<T>, UniquePtr<T>, String) in kernel/cpp/cpp_containers.hpp
- Implement object-oriented Device driver model (Device, BlockDevice, CharDevice, VirtualRamDiskDevice, VirtualNullDevice, VirtualZeroDevice, DeviceManager) in kernel/cpp/cpp_device.hpp and kernel/cpp/cpp_device.cpp
- Add C++ kernel performance microbenchmark suite in kernel/cpp/cpp_bench.cpp
- Export C-FFI bridges and add cross-architecture fallbacks in kernel/cpp/cpp_fallback.c and include/kernel/cpp_kernel.h
- Add LazyBox applets: 'cppdevs' and 'cppbench'
- Update README.md documentation and command matrix
- Implement flicker-free atomic double-buffered frame rendering and sub-tick input polling in userland/lazybox/snake.c
- Add multi-input support (PS/2 keyboard scancodes and serial ANSI arrow escape sequences)
- Add sound effects (food beep, game over chime) and live speed scaling (+/- keys, P to pause)
- Add POSIX /dev/shm shared memory subsystem in ipc/shm_posix.c and include/ipc/shm_posix.h
- Add DNS resolver cache with TTL tracking in net/ipv4/dns_cache.c and include/net/dns_cache.h
- Add audio tone and jingle synthesizer in sound/beep.c and include/sound/beep.h
- Add %o octal formatting support in lib/vsprintf.c
- Add LazyBox applets: 'shm', 'dnscache', and 'beep'
- Add freestanding C++17 runtime with operator new/delete, pure virtual handlers, and global constructor execution in kernel/cpp/cxx_runtime.cpp
- Implement C++ Object-Oriented telemetry and hardware services with polymorphism in kernel/cpp/cpp_module.cpp and include/kernel/cpp_kernel.h
- Add interactive ANSI Snake Game in userland/lazybox/snake.c with real-time keyboard control and automated simulation mode
- Initialize C++ subsystem during kernel boot step [8/14] in kernel/main.c
- Add LazyBox applets: 'snake', 'cppinfo', and 'cpptest'
