82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
// tiny_policy_learner_box.c - Placeholder learner hook
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#include "tiny_policy_learner_box.h"
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#include "tiny_class_policy_box.h"
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#include "tiny_class_stats_box.h"
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#include <stdint.h>
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#include <stdio.h>
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// Simple OBSERVE/LEARN rule (auto profile only):
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// - C7 は常に ON (page + warm, cap=8)
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// - それ以外のクラスから score = shared_lock*4 + uc_miss の上位2つだけ page/warm を ON
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// - warm_cap は C5–C7:8, それ以外:4
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// - スコアが 0 なら何も変更しない
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void tiny_policy_learner_tick(void) {
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if (!tiny_class_policy_is_auto()) {
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return;
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}
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TinyClassStatsThread snap = {0};
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tiny_class_stats_snapshot_global(&snap);
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// 事前に全クラスを OFF ベースに初期化（cap はデフォルト値に）
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for (int c = 0; c < TINY_NUM_CLASSES; c++) {
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TinyClassPolicy* p = &g_tiny_class_policy[c];
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p->page_box_enabled = 0;
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p->warm_enabled = 0;
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p->warm_cap = (c >= 5) ? 8 : 4;
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p->tls_carve_enabled = 0;
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}
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// C7 は常に ON
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g_tiny_class_policy[7].page_box_enabled = 1;
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g_tiny_class_policy[7].warm_enabled = 1;
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g_tiny_class_policy[7].warm_cap = 8;
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g_tiny_class_policy[7].tls_carve_enabled = 1;
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// C7 を除く上位2クラスをスコアで選択
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int top1 = -1, top2 = -1;
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uint64_t v1 = 0, v2 = 0;
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for (int i = 0; i < TINY_NUM_CLASSES; i++) {
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if (i == 7) continue;
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uint64_t score = snap.shared_lock[i] * 4 + snap.uc_miss[i];
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if (score > v1) {
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top2 = top1;
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v2 = v1;
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top1 = i;
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v1 = score;
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} else if (score > v2) {
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top2 = i;
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v2 = score;
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}
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}
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// スコアが全く無い場合は C7 だけ維持
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if (v1 == 0) {
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return;
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}
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if (top1 >= 0) {
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TinyClassPolicy* p = &g_tiny_class_policy[top1];
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p->page_box_enabled = 1;
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p->warm_enabled = 1;
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p->tls_carve_enabled = 1;
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}
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if (top2 >= 0 && v2 > 0) {
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TinyClassPolicy* p = &g_tiny_class_policy[top2];
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p->page_box_enabled = 1;
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p->warm_enabled = 1;
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p->tls_carve_enabled = 1;
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}
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// 1-shot ログ（最多 4 回まで）
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static _Atomic uint32_t auto_logs = 0;
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if (tiny_policy_log_enabled()) {
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uint32_t n = atomic_fetch_add_explicit(&auto_logs, 1, memory_order_relaxed);
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if (n < 4) {
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fprintf(stderr, "[POLICY_AUTO_UPDATE] profile=auto (top=%d/%d)\n", top1, top2);
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tiny_class_policy_dump(NULL);
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}
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}
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}
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