95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
// tiny_class_policy_box.c - Initialization of per-class Tiny policy table
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#include "tiny_class_policy_box.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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TinyClassPolicy g_tiny_class_policy[TINY_NUM_CLASSES];
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static _Atomic int g_tiny_class_policy_init_done = 0;
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static _Atomic int g_tiny_class_policy_logged = 0;
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static inline TinyClassPolicy tiny_class_policy_default_entry(void) {
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TinyClassPolicy p = {0};
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p.page_box_enabled = 0;
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p.warm_enabled = 0;
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p.warm_cap = 0;
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return p;
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}
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static void tiny_class_policy_set_legacy(void) {
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TinyClassPolicy def = tiny_class_policy_default_entry();
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for (int i = 0; i < TINY_NUM_CLASSES; i++) {
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g_tiny_class_policy[i] = def;
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}
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// legacy: Page Box は C5–C7、Warm は全クラス ON（C0–C4 は控えめ cap）
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for (int i = 0; i < TINY_NUM_CLASSES; i++) {
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g_tiny_class_policy[i].warm_enabled = 1;
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g_tiny_class_policy[i].warm_cap = (i < 5) ? 4 : 8;
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}
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for (int i = 5; i < TINY_NUM_CLASSES; i++) {
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g_tiny_class_policy[i].page_box_enabled = 1;
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}
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}
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static void tiny_class_policy_set_c5_7_only(void) {
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TinyClassPolicy def = tiny_class_policy_default_entry();
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for (int i = 0; i < TINY_NUM_CLASSES; i++) {
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g_tiny_class_policy[i] = def;
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}
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for (int i = 5; i < TINY_NUM_CLASSES; i++) {
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g_tiny_class_policy[i].page_box_enabled = 1;
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g_tiny_class_policy[i].warm_enabled = 1;
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g_tiny_class_policy[i].warm_cap = 8;
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}
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}
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static void tiny_class_policy_set_tinyplus_all(void) {
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// いまは legacy と同じ挙動でエントリを用意しておく。
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tiny_class_policy_set_legacy();
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}
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static const char* tiny_class_policy_set_profile(const char* profile) {
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if (profile == NULL || *profile == '\0' || strcasecmp(profile, "legacy") == 0) {
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tiny_class_policy_set_legacy();
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return "legacy";
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} else if (strcasecmp(profile, "c5_7_only") == 0) {
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tiny_class_policy_set_c5_7_only();
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return "c5_7_only";
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} else if (strcasecmp(profile, "tinyplus_all") == 0) {
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tiny_class_policy_set_tinyplus_all();
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return "tinyplus_all";
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} else {
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// 不明な値は安全側で legacy にフォールバック。
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tiny_class_policy_set_legacy();
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return "legacy";
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}
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}
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void tiny_class_policy_init_once(void) {
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if (atomic_load_explicit(&g_tiny_class_policy_init_done, memory_order_acquire)) {
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return;
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}
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const char* profile = getenv("HAKMEM_TINY_POLICY_PROFILE");
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const char* active_profile = tiny_class_policy_set_profile(profile);
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// 1-shot ダンプでポリシーの内容を可視化（デバッグ用）
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if (atomic_exchange_explicit(&g_tiny_class_policy_logged, 1, memory_order_acq_rel) == 0) {
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fprintf(stderr, "[POLICY_INIT] profile=%s\n", active_profile);
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for (int cls = 0; cls < TINY_NUM_CLASSES; cls++) {
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TinyClassPolicy* p = &g_tiny_class_policy[cls];
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fprintf(stderr,
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" C%d: page=%u warm=%u cap=%u\n",
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cls,
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p->page_box_enabled,
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p->warm_enabled,
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p->warm_cap);
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}
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}
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atomic_store_explicit(&g_tiny_class_policy_init_done, 1, memory_order_release);
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}
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