Robert Allan JamesandClaude Sonnet 5
00e657019e
Replaces STADIUM_MAX_VM_COUNT (Kconfig, hardcoded default 4) with a boot-time computation, mirroring the pattern stadium_boot_init() already used for the cell pool. New Kconfig STADIUM_VM_MEMORY_PERCENT (default 50): max_vm_count = (kmalloc_get_stats().free_bytes after the cell array * STADIUM_VM_MEMORY_PERCENT / 100) / VM_MEMORY_SIZE, floored to 1, no ceiling (population is not knowable in advance - could be 4, could be 4000). stadium_quotas and word_slots (plus stat_promotions/stat_evictions) are now kmalloc'd to the computed count instead of declared with a macro. New accessor stadium_max_vm_count() replaces every STADIUM_MAX_VM_COUNT reference, including capsule_birth.c's birth-refusal gate. Two things found and fixed along the way: - The existing cell-pool budget was sourced from pmm_get_stats(), which reflects physical pages PMM hasn't handed to any subsystem yet - but the actual allocation is kmalloc(), which draws from the separate, fixed-size heap kmalloc_init() (M6) already carved out of PMM before stadium_boot_init() ever runs. Budgeting against PMM's leftover and allocating from the kmalloc heap are two different pools. Both the cell budget and the new VM-count budget now source from kmalloc_get_stats() instead. - stadium_owner[] (which VM's quota owns each cell) was uint8_t, capped at 255 slots by a compile-time assert tied to the old macro. Widened to uint16_t (65535 slots of headroom) with a runtime clamp + log if the computed count ever exceeds that, since there's no ceiling anymore. Three-arch QEMU acceptance: all clean to ok>, computed VM count genuinely differs by actual available RAM (amd64/riscv64: 50 slots at -m 1024, aarch64: 101 slots), Stadium conservation invariant identical across all three (resident_sum=43691 reservoir=21845 sum=65536). logs/20260815-080526/amd64, logs/20260815-080826/aarch64, logs/20260815-080952/riscv64. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
241 lines
8.5 KiB
C
241 lines
8.5 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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* StarForth VM Feature Configuration
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*
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* This header is the single source of truth for VM build-time defaults.
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* Build systems may override any option via -D<FLAG>=<value>, but every
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* translation unit sees these defaults even if no -D is provided.
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*
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* Hosted + kernel builds both force-include this header (see Makefiles),
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* so new toggles belong here with a documented owner.
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*/
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#ifndef STARFORTH_CONFIG_H
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#define STARFORTH_CONFIG_H
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/* Base defaults (match 2025-12-26 hosted baseline) */
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#define STARFORTH_CONFIG_STRICT_PTR_DEFAULT 1
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#define STARFORTH_CONFIG_ENABLE_HOTWORDS_CACHE_DEFAULT 0
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#define STARFORTH_CONFIG_ENABLE_PIPELINING_DEFAULT 0
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#define STARFORTH_CONFIG_ROLLING_WINDOW_SIZE_DEFAULT 4096
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#define STARFORTH_CONFIG_TRANSITION_WINDOW_SIZE_DEFAULT 8
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#define STARFORTH_CONFIG_ADAPTIVE_SHRINK_RATE_DEFAULT 50
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#define STARFORTH_CONFIG_ADAPTIVE_MIN_WINDOW_SIZE_DEFAULT 256
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#define STARFORTH_CONFIG_ADAPTIVE_CHECK_FREQUENCY_DEFAULT 512
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#define STARFORTH_CONFIG_ADAPTIVE_GROWTH_THRESHOLD_DEFAULT 5
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#define STARFORTH_CONFIG_INITIAL_DECAY_SLOPE_Q48_DEFAULT 21845
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#define STARFORTH_CONFIG_DECAY_MIN_INTERVAL_DEFAULT 1000ULL
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#define STARFORTH_CONFIG_DECAY_RATE_PER_US_Q16_DEFAULT 1
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#define STARFORTH_CONFIG_HEARTBEAT_THREAD_ENABLED_DEFAULT 1
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#define STARFORTH_CONFIG_HEARTBEAT_TICK_NS_DEFAULT 10000ULL
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#define STARFORTH_CONFIG_HEARTBEAT_INFERENCE_FREQUENCY_DEFAULT 1000
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#define STARFORTH_CONFIG_STADIUM_VM_MEMORY_PERCENT_DEFAULT 50
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#define STARFORTH_CONFIG_STADIUM_CONTAINS_DEPTH_MAX_DEFAULT 5
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#define STARFORTH_CONFIG_STADIUM_CAPACITY_TICK_DEFAULT 1000
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#define STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT 1
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#define STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT 2048
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#define STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT 21845
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#define STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT 256
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#define STARFORTH_CONFIG_HEARTBEAT_WINDOW_TUNING_FREQUENCY_DEFAULT 1000
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#define STARFORTH_CONFIG_HEARTBEAT_SLOPE_VALIDATION_FREQUENCY_DEFAULT 5000
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#define STARFORTH_CONFIG_SSM_ENTROPY_HIGH_THRESHOLD_DEFAULT 0.75
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#define STARFORTH_CONFIG_SSM_CV_HIGH_THRESHOLD_DEFAULT 0.15
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#define STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_THRESHOLD_DEFAULT 0.5
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#define STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_LOW_THRESHOLD_DEFAULT 0.3
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#define STARFORTH_CONFIG_SSM_HYSTERESIS_TICKS_DEFAULT 5
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#define STARFORTH_CONFIG_SPECULATION_THRESHOLD_Q48_DEFAULT (0x8000LL)
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#define STARFORTH_CONFIG_SPECULATION_DEPTH_DEFAULT 1
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#define STARFORTH_CONFIG_MIN_SAMPLES_FOR_SPECULATION_DEFAULT 10
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#define STARFORTH_CONFIG_MISPREDICTION_COST_Q48_DEFAULT (25LL << 16)
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/* 1.10 in Q48.16 (1.10 * 65536 = 72089.6, rounds to 0x1199A). Was shipped
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* for years as 0x11999AL (an extra hex digit, ~17.6 in Q48.16, an order of
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* magnitude off from the documented 1.10 intent) -- found while migrating
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* this constant to Kconfig (see rev x in
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* docs/working/architecture/VM-FLEET-ATTRACTOR-DESIGN-20260705.md) and
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* fixed on Bob's explicit instruction (rev y). */
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#define STARFORTH_CONFIG_MINIMUM_PREFETCH_ROI_DEFAULT (0x1199AL)
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/* Public macros (overridable via -D) */
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#ifndef STRICT_PTR
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#define STRICT_PTR STARFORTH_CONFIG_STRICT_PTR_DEFAULT
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#endif
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#ifndef VM_STRICT_PTR
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#define VM_STRICT_PTR STRICT_PTR
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#endif
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#ifndef ENABLE_HOTWORDS_CACHE
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#define ENABLE_HOTWORDS_CACHE STARFORTH_CONFIG_ENABLE_HOTWORDS_CACHE_DEFAULT
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#endif
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#ifndef ENABLE_PIPELINING
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#define ENABLE_PIPELINING STARFORTH_CONFIG_ENABLE_PIPELINING_DEFAULT
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#endif
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#ifndef ROLLING_WINDOW_SIZE
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#define ROLLING_WINDOW_SIZE STARFORTH_CONFIG_ROLLING_WINDOW_SIZE_DEFAULT
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#endif
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#ifndef TRANSITION_WINDOW_SIZE
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#define TRANSITION_WINDOW_SIZE STARFORTH_CONFIG_TRANSITION_WINDOW_SIZE_DEFAULT
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#endif
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#ifndef ADAPTIVE_SHRINK_RATE
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#define ADAPTIVE_SHRINK_RATE STARFORTH_CONFIG_ADAPTIVE_SHRINK_RATE_DEFAULT
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#endif
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#ifndef ADAPTIVE_MIN_WINDOW_SIZE
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#define ADAPTIVE_MIN_WINDOW_SIZE STARFORTH_CONFIG_ADAPTIVE_MIN_WINDOW_SIZE_DEFAULT
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#endif
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#ifndef ADAPTIVE_CHECK_FREQUENCY
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#define ADAPTIVE_CHECK_FREQUENCY STARFORTH_CONFIG_ADAPTIVE_CHECK_FREQUENCY_DEFAULT
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#endif
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#ifndef ADAPTIVE_GROWTH_THRESHOLD
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#define ADAPTIVE_GROWTH_THRESHOLD STARFORTH_CONFIG_ADAPTIVE_GROWTH_THRESHOLD_DEFAULT
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#endif
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#ifndef INITIAL_DECAY_SLOPE_Q48
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#define INITIAL_DECAY_SLOPE_Q48 STARFORTH_CONFIG_INITIAL_DECAY_SLOPE_Q48_DEFAULT
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#endif
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#ifndef DECAY_MIN_INTERVAL
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#define DECAY_MIN_INTERVAL STARFORTH_CONFIG_DECAY_MIN_INTERVAL_DEFAULT
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#endif
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#ifndef DECAY_RATE_PER_US_Q16
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#define DECAY_RATE_PER_US_Q16 STARFORTH_CONFIG_DECAY_RATE_PER_US_Q16_DEFAULT
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#endif
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#ifndef HEARTBEAT_THREAD_ENABLED
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#define HEARTBEAT_THREAD_ENABLED STARFORTH_CONFIG_HEARTBEAT_THREAD_ENABLED_DEFAULT
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#endif
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#ifndef HEARTBEAT_TICK_NS
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#define HEARTBEAT_TICK_NS STARFORTH_CONFIG_HEARTBEAT_TICK_NS_DEFAULT
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#endif
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#ifndef HEARTBEAT_INFERENCE_FREQUENCY
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#define HEARTBEAT_INFERENCE_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_INFERENCE_FREQUENCY_DEFAULT
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#endif
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#ifndef STADIUM_VM_MEMORY_PERCENT
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#define STADIUM_VM_MEMORY_PERCENT STARFORTH_CONFIG_STADIUM_VM_MEMORY_PERCENT_DEFAULT
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#endif
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#ifndef STADIUM_CONTAINS_DEPTH_MAX
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#define STADIUM_CONTAINS_DEPTH_MAX STARFORTH_CONFIG_STADIUM_CONTAINS_DEPTH_MAX_DEFAULT
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#endif
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#ifndef STADIUM_CAPACITY_TICK
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#define STADIUM_CAPACITY_TICK STARFORTH_CONFIG_STADIUM_CAPACITY_TICK_DEFAULT
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#endif
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#ifndef STADIUM_MEMORY_PERCENT
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#define STADIUM_MEMORY_PERCENT STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT
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#endif
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#ifndef STADIUM_WORD_HEAT_QUANTUM
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#define STADIUM_WORD_HEAT_QUANTUM STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT
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#endif
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#ifndef STADIUM_WORD_COOL_RATE_Q48
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#define STADIUM_WORD_COOL_RATE_Q48 STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT
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#endif
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#ifndef HEARTBEAT_CHECK_FREQUENCY
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#define HEARTBEAT_CHECK_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT
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#endif
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#ifndef HEARTBEAT_WINDOW_TUNING_FREQUENCY
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#define HEARTBEAT_WINDOW_TUNING_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_WINDOW_TUNING_FREQUENCY_DEFAULT
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#endif
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#ifndef HEARTBEAT_SLOPE_VALIDATION_FREQUENCY
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#define HEARTBEAT_SLOPE_VALIDATION_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_SLOPE_VALIDATION_FREQUENCY_DEFAULT
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#endif
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#ifndef SSM_ENTROPY_HIGH_THRESHOLD
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#define SSM_ENTROPY_HIGH_THRESHOLD STARFORTH_CONFIG_SSM_ENTROPY_HIGH_THRESHOLD_DEFAULT
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#endif
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#ifndef SSM_CV_HIGH_THRESHOLD
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#define SSM_CV_HIGH_THRESHOLD STARFORTH_CONFIG_SSM_CV_HIGH_THRESHOLD_DEFAULT
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#endif
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#ifndef SSM_TEMPORAL_DECAY_THRESHOLD
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#define SSM_TEMPORAL_DECAY_THRESHOLD STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_THRESHOLD_DEFAULT
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#endif
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#ifndef SSM_TEMPORAL_DECAY_LOW_THRESHOLD
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#define SSM_TEMPORAL_DECAY_LOW_THRESHOLD STARFORTH_CONFIG_SSM_TEMPORAL_DECAY_LOW_THRESHOLD_DEFAULT
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#endif
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#ifndef SSM_HYSTERESIS_TICKS
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#define SSM_HYSTERESIS_TICKS STARFORTH_CONFIG_SSM_HYSTERESIS_TICKS_DEFAULT
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#endif
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#ifndef SPECULATION_THRESHOLD_Q48
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#define SPECULATION_THRESHOLD_Q48 STARFORTH_CONFIG_SPECULATION_THRESHOLD_Q48_DEFAULT
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#endif
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#ifndef SPECULATION_DEPTH
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#define SPECULATION_DEPTH STARFORTH_CONFIG_SPECULATION_DEPTH_DEFAULT
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#endif
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#ifndef MIN_SAMPLES_FOR_SPECULATION
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#define MIN_SAMPLES_FOR_SPECULATION STARFORTH_CONFIG_MIN_SAMPLES_FOR_SPECULATION_DEFAULT
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#endif
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#ifndef MISPREDICTION_COST_Q48
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#define MISPREDICTION_COST_Q48 STARFORTH_CONFIG_MISPREDICTION_COST_Q48_DEFAULT
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#endif
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#ifndef MINIMUM_PREFETCH_ROI
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#define MINIMUM_PREFETCH_ROI STARFORTH_CONFIG_MINIMUM_PREFETCH_ROI_DEFAULT
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#endif
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#endif /* STARFORTH_CONFIG_H */
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