Robert Allan JamesandClaude Sonnet 5
89d8c08582
Closes FABRIC-2.md's last open §12 Q5 question. fleet_heartbeat_tick_count is fed by every live VM's own vm_tick(), not one VM's, so it was reaching HEARTBEAT_INFERENCE_FREQUENCY (shared/borrowed from the per-VM inference gate) several times faster than intended with more than one VM live - backwards from FABRIC.md §22.4's required ~1000:1 separation. What's actually gated turned out to be low-stakes: vm_physics_tick() (capsule_vm_physics.c:397) is a passive statistics refit - re-sorts a window of past heat-transfer samples and recomputes a median rate estimate. It doesn't move heat or arbitrate capacity. Firing too often just meant a noisier statistic recomputed more frequently than planned, not incorrect behavior. Considered and explicitly rejected: scaling the threshold by live VM count at the check site. That's the first brick of a scheduler - reading fleet state to adjust a rate dynamically - which this project has deliberately avoided building. Implemented instead: STADIUM_CAPACITY_TICK (existing Kconfig symbol, defined but never read by any code path) now gates vm_physics_heartbeat_tick()'s call directly, replacing the borrowed HEARTBEAT_INFERENCE_FREQUENCY. Default bumped 1000 -> 4000, a flat constant picked once for Tripod's known 4-VM topology, same kind of placeholder as every other frequency knob in Kconfig.kernel - not computed from anything at runtime. Renamed fleet_last_inference_tick -> fleet_last_capacity_tick to match. Still one clock, one counter (fleet_heartbeat_tick_count) - just a bigger flat divisor on it. Three-arch QEMU acceptance: all clean to ok>, identical Stadium conservation invariant on all three (resident_sum=43691 reservoir=21845 sum=65536). logs/20260815-093425/amd64, logs/20260815-093521/aarch64, logs/20260815-093641/riscv64. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
241 lines
8.5 KiB
C
241 lines
8.5 KiB
C
/*
|
||
StarForth — Steady-State Virtual Machine Runtime
|
||
|
||
Copyright (c) 2023–2025 Robert A. James
|
||
All rights reserved.
|
||
|
||
This file is part of the StarForth project.
|
||
|
||
Licensed under the StarForth License, Version 1.0 (the "License");
|
||
you may not use this file except in compliance with the License.
|
||
|
||
You may obtain a copy of the License at:
|
||
https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
|
||
|
||
This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
express or implied, including but not limited to the warranties of
|
||
merchantability, fitness for a particular purpose, and noninfringement.
|
||
|
||
See the License for the specific language governing permissions and
|
||
limitations under the License.
|
||
|
||
StarForth — Steady-State Virtual Machine Runtime
|
||
Copyright (c) 2023–2025 Robert A. James
|
||
All rights reserved.
|
||
|
||
This file is part of the StarForth project.
|
||
|
||
Licensed under the StarForth License, Version 1.0 (the "License");
|
||
you may not use this file except in compliance with the License.
|
||
|
||
You may obtain a copy of the License at:
|
||
https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
|
||
|
||
This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
express or implied, including but not limited to the warranties of
|
||
merchantability, fitness for a particular purpose, and noninfringement.
|
||
|
||
See the License for the specific language governing permissions and
|
||
limitations under the License.
|
||
|
||
*/
|
||
|
||
/*
|
||
* StarForth VM Feature Configuration
|
||
*
|
||
* This header is the single source of truth for VM build-time defaults.
|
||
* Build systems may override any option via -D<FLAG>=<value>, but every
|
||
* translation unit sees these defaults even if no -D is provided.
|
||
*
|
||
* Hosted + kernel builds both force-include this header (see Makefiles),
|
||
* so new toggles belong here with a documented owner.
|
||
*/
|
||
|
||
#ifndef STARFORTH_CONFIG_H
|
||
#define STARFORTH_CONFIG_H
|
||
|
||
/* Base defaults (match 2025-12-26 hosted baseline) */
|
||
#define STARFORTH_CONFIG_STRICT_PTR_DEFAULT 1
|
||
#define STARFORTH_CONFIG_ENABLE_HOTWORDS_CACHE_DEFAULT 0
|
||
#define STARFORTH_CONFIG_ENABLE_PIPELINING_DEFAULT 0
|
||
#define STARFORTH_CONFIG_ROLLING_WINDOW_SIZE_DEFAULT 4096
|
||
#define STARFORTH_CONFIG_TRANSITION_WINDOW_SIZE_DEFAULT 8
|
||
#define STARFORTH_CONFIG_ADAPTIVE_SHRINK_RATE_DEFAULT 50
|
||
#define STARFORTH_CONFIG_ADAPTIVE_MIN_WINDOW_SIZE_DEFAULT 256
|
||
#define STARFORTH_CONFIG_ADAPTIVE_CHECK_FREQUENCY_DEFAULT 512
|
||
#define STARFORTH_CONFIG_ADAPTIVE_GROWTH_THRESHOLD_DEFAULT 5
|
||
#define STARFORTH_CONFIG_INITIAL_DECAY_SLOPE_Q48_DEFAULT 21845
|
||
#define STARFORTH_CONFIG_DECAY_MIN_INTERVAL_DEFAULT 1000ULL
|
||
#define STARFORTH_CONFIG_DECAY_RATE_PER_US_Q16_DEFAULT 1
|
||
#define STARFORTH_CONFIG_HEARTBEAT_THREAD_ENABLED_DEFAULT 1
|
||
#define STARFORTH_CONFIG_HEARTBEAT_TICK_NS_DEFAULT 10000ULL
|
||
#define STARFORTH_CONFIG_HEARTBEAT_INFERENCE_FREQUENCY_DEFAULT 1000
|
||
#define STARFORTH_CONFIG_STADIUM_VM_MEMORY_PERCENT_DEFAULT 50
|
||
#define STARFORTH_CONFIG_STADIUM_CONTAINS_DEPTH_MAX_DEFAULT 5
|
||
#define STARFORTH_CONFIG_STADIUM_CAPACITY_TICK_DEFAULT 4000
|
||
#define STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT 1
|
||
#define STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT 2048
|
||
#define STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT 21845
|
||
#define STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT 256
|
||
#define STARFORTH_CONFIG_HEARTBEAT_WINDOW_TUNING_FREQUENCY_DEFAULT 1000
|
||
#define STARFORTH_CONFIG_HEARTBEAT_SLOPE_VALIDATION_FREQUENCY_DEFAULT 5000
|
||
#define STARFORTH_CONFIG_SSM_ENTROPY_HIGH_THRESHOLD_DEFAULT 0.75
|
||
#define STARFORTH_CONFIG_SSM_CV_HIGH_THRESHOLD_DEFAULT 0.15
|
||
#define STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_THRESHOLD_DEFAULT 0.5
|
||
#define STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_LOW_THRESHOLD_DEFAULT 0.3
|
||
#define STARFORTH_CONFIG_SSM_HYSTERESIS_TICKS_DEFAULT 5
|
||
#define STARFORTH_CONFIG_SPECULATION_THRESHOLD_Q48_DEFAULT (0x8000LL)
|
||
#define STARFORTH_CONFIG_SPECULATION_DEPTH_DEFAULT 1
|
||
#define STARFORTH_CONFIG_MIN_SAMPLES_FOR_SPECULATION_DEFAULT 10
|
||
#define STARFORTH_CONFIG_MISPREDICTION_COST_Q48_DEFAULT (25LL << 16)
|
||
/* 1.10 in Q48.16 (1.10 * 65536 = 72089.6, rounds to 0x1199A). Was shipped
|
||
* for years as 0x11999AL (an extra hex digit, ~17.6 in Q48.16, an order of
|
||
* magnitude off from the documented 1.10 intent) -- found while migrating
|
||
* this constant to Kconfig (see rev x in
|
||
* docs/working/architecture/VM-FLEET-ATTRACTOR-DESIGN-20260705.md) and
|
||
* fixed on Bob's explicit instruction (rev y). */
|
||
#define STARFORTH_CONFIG_MINIMUM_PREFETCH_ROI_DEFAULT (0x1199AL)
|
||
|
||
/* Public macros (overridable via -D) */
|
||
#ifndef STRICT_PTR
|
||
#define STRICT_PTR STARFORTH_CONFIG_STRICT_PTR_DEFAULT
|
||
#endif
|
||
|
||
#ifndef VM_STRICT_PTR
|
||
#define VM_STRICT_PTR STRICT_PTR
|
||
#endif
|
||
|
||
#ifndef ENABLE_HOTWORDS_CACHE
|
||
#define ENABLE_HOTWORDS_CACHE STARFORTH_CONFIG_ENABLE_HOTWORDS_CACHE_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ENABLE_PIPELINING
|
||
#define ENABLE_PIPELINING STARFORTH_CONFIG_ENABLE_PIPELINING_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ROLLING_WINDOW_SIZE
|
||
#define ROLLING_WINDOW_SIZE STARFORTH_CONFIG_ROLLING_WINDOW_SIZE_DEFAULT
|
||
#endif
|
||
|
||
#ifndef TRANSITION_WINDOW_SIZE
|
||
#define TRANSITION_WINDOW_SIZE STARFORTH_CONFIG_TRANSITION_WINDOW_SIZE_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ADAPTIVE_SHRINK_RATE
|
||
#define ADAPTIVE_SHRINK_RATE STARFORTH_CONFIG_ADAPTIVE_SHRINK_RATE_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ADAPTIVE_MIN_WINDOW_SIZE
|
||
#define ADAPTIVE_MIN_WINDOW_SIZE STARFORTH_CONFIG_ADAPTIVE_MIN_WINDOW_SIZE_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ADAPTIVE_CHECK_FREQUENCY
|
||
#define ADAPTIVE_CHECK_FREQUENCY STARFORTH_CONFIG_ADAPTIVE_CHECK_FREQUENCY_DEFAULT
|
||
#endif
|
||
|
||
#ifndef ADAPTIVE_GROWTH_THRESHOLD
|
||
#define ADAPTIVE_GROWTH_THRESHOLD STARFORTH_CONFIG_ADAPTIVE_GROWTH_THRESHOLD_DEFAULT
|
||
#endif
|
||
|
||
#ifndef INITIAL_DECAY_SLOPE_Q48
|
||
#define INITIAL_DECAY_SLOPE_Q48 STARFORTH_CONFIG_INITIAL_DECAY_SLOPE_Q48_DEFAULT
|
||
#endif
|
||
|
||
#ifndef DECAY_MIN_INTERVAL
|
||
#define DECAY_MIN_INTERVAL STARFORTH_CONFIG_DECAY_MIN_INTERVAL_DEFAULT
|
||
#endif
|
||
|
||
#ifndef DECAY_RATE_PER_US_Q16
|
||
#define DECAY_RATE_PER_US_Q16 STARFORTH_CONFIG_DECAY_RATE_PER_US_Q16_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_THREAD_ENABLED
|
||
#define HEARTBEAT_THREAD_ENABLED STARFORTH_CONFIG_HEARTBEAT_THREAD_ENABLED_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_TICK_NS
|
||
#define HEARTBEAT_TICK_NS STARFORTH_CONFIG_HEARTBEAT_TICK_NS_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_INFERENCE_FREQUENCY
|
||
#define HEARTBEAT_INFERENCE_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_INFERENCE_FREQUENCY_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_VM_MEMORY_PERCENT
|
||
#define STADIUM_VM_MEMORY_PERCENT STARFORTH_CONFIG_STADIUM_VM_MEMORY_PERCENT_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_CONTAINS_DEPTH_MAX
|
||
#define STADIUM_CONTAINS_DEPTH_MAX STARFORTH_CONFIG_STADIUM_CONTAINS_DEPTH_MAX_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_CAPACITY_TICK
|
||
#define STADIUM_CAPACITY_TICK STARFORTH_CONFIG_STADIUM_CAPACITY_TICK_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_MEMORY_PERCENT
|
||
#define STADIUM_MEMORY_PERCENT STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_WORD_HEAT_QUANTUM
|
||
#define STADIUM_WORD_HEAT_QUANTUM STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT
|
||
#endif
|
||
|
||
#ifndef STADIUM_WORD_COOL_RATE_Q48
|
||
#define STADIUM_WORD_COOL_RATE_Q48 STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_CHECK_FREQUENCY
|
||
#define HEARTBEAT_CHECK_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_WINDOW_TUNING_FREQUENCY
|
||
#define HEARTBEAT_WINDOW_TUNING_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_WINDOW_TUNING_FREQUENCY_DEFAULT
|
||
#endif
|
||
|
||
#ifndef HEARTBEAT_SLOPE_VALIDATION_FREQUENCY
|
||
#define HEARTBEAT_SLOPE_VALIDATION_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_SLOPE_VALIDATION_FREQUENCY_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SSM_ENTROPY_HIGH_THRESHOLD
|
||
#define SSM_ENTROPY_HIGH_THRESHOLD STARFORTH_CONFIG_SSM_ENTROPY_HIGH_THRESHOLD_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SSM_CV_HIGH_THRESHOLD
|
||
#define SSM_CV_HIGH_THRESHOLD STARFORTH_CONFIG_SSM_CV_HIGH_THRESHOLD_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SSM_TEMPORAL_DECAY_THRESHOLD
|
||
#define SSM_TEMPORAL_DECAY_THRESHOLD STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_THRESHOLD_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SSM_TEMPORAL_DECAY_LOW_THRESHOLD
|
||
#define SSM_TEMPORAL_DECAY_LOW_THRESHOLD STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_LOW_THRESHOLD_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SSM_HYSTERESIS_TICKS
|
||
#define SSM_HYSTERESIS_TICKS STARFORTH_CONFIG_SSM_HYSTERESIS_TICKS_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SPECULATION_THRESHOLD_Q48
|
||
#define SPECULATION_THRESHOLD_Q48 STARFORTH_CONFIG_SPECULATION_THRESHOLD_Q48_DEFAULT
|
||
#endif
|
||
|
||
#ifndef SPECULATION_DEPTH
|
||
#define SPECULATION_DEPTH STARFORTH_CONFIG_SPECULATION_DEPTH_DEFAULT
|
||
#endif
|
||
|
||
#ifndef MIN_SAMPLES_FOR_SPECULATION
|
||
#define MIN_SAMPLES_FOR_SPECULATION STARFORTH_CONFIG_MIN_SAMPLES_FOR_SPECULATION_DEFAULT
|
||
#endif
|
||
|
||
#ifndef MISPREDICTION_COST_Q48
|
||
#define MISPREDICTION_COST_Q48 STARFORTH_CONFIG_MISPREDICTION_COST_Q48_DEFAULT
|
||
#endif
|
||
|
||
#ifndef MINIMUM_PREFETCH_ROI
|
||
#define MINIMUM_PREFETCH_ROI STARFORTH_CONFIG_MINIMUM_PREFETCH_ROI_DEFAULT
|
||
#endif
|
||
|
||
#endif /* STARFORTH_CONFIG_H */
|