Boxify superslab registry, add bench profile, and document C7 hotpath experiments

core/box/tiny_class_policy_box.c

@@ -6,17 +6,20 @@
 #include <string.h>
 #include <strings.h>
 #include "tiny_policy_learner_box.h"
+#include "tiny_mem_stats_box.h"
 
 TinyClassPolicy g_tiny_class_policy[TINY_NUM_CLASSES];
 static _Atomic int g_tiny_class_policy_init_done = 0;
 static _Atomic int g_tiny_class_policy_logged = 0;
 static _Atomic int g_tiny_class_policy_profile_auto = 0;
+static _Atomic int g_tiny_class_policy_mem_recorded = 0;
 
 static inline TinyClassPolicy tiny_class_policy_default_entry(void) {
     TinyClassPolicy p = {0};
     p.page_box_enabled = 0;
     p.warm_enabled = 0;
     p.warm_cap = 0;
+    p.tls_carve_enabled = 0;
     return p;
 }
 
@@ -30,6 +33,7 @@ static void tiny_class_policy_set_legacy(void) {
     for (int i = 0; i < TINY_NUM_CLASSES; i++) {
         g_tiny_class_policy[i].warm_enabled = 1;
         g_tiny_class_policy[i].warm_cap = (i < 5) ? 4 : 8;
+        g_tiny_class_policy[i].tls_carve_enabled = (i >= 5) ? 1 : 0;
     }
     for (int i = 5; i < TINY_NUM_CLASSES; i++) {
         g_tiny_class_policy[i].page_box_enabled = 1;
@@ -45,6 +49,7 @@ static void tiny_class_policy_set_c5_7_only(void) {
         g_tiny_class_policy[i].page_box_enabled = 1;
         g_tiny_class_policy[i].warm_enabled = 1;
         g_tiny_class_policy[i].warm_cap = 8;
+        g_tiny_class_policy[i].tls_carve_enabled = 1;
     }
 }
 
@@ -53,6 +58,18 @@ static void tiny_class_policy_set_tinyplus_all(void) {
     tiny_class_policy_set_legacy();
 }
 
+static void tiny_class_policy_set_larson_guard(void) {
+    // Start from legacy, then tighten warm caps to reduce RSS for larson-style loads.
+    tiny_class_policy_set_legacy();
+    for (int i = 0; i < TINY_NUM_CLASSES; i++) {
+        if (i < 5) {
+            g_tiny_class_policy[i].warm_cap = 2;
+        } else {
+            g_tiny_class_policy[i].warm_cap = 4;
+        }
+    }
+}
+
 static void tiny_class_policy_set_auto(void) {
     // auto プロファイルは legacy をベースにして、後段の learner に委譲
     tiny_class_policy_set_legacy();
@@ -72,6 +89,10 @@ static const char* tiny_class_policy_set_profile(const char* profile) {
         tiny_class_policy_set_tinyplus_all();
         atomic_store_explicit(&g_tiny_class_policy_profile_auto, 0, memory_order_release);
         return "tinyplus_all";
+    } else if (strcasecmp(profile, "larson_guard") == 0) {
+        tiny_class_policy_set_larson_guard();
+        atomic_store_explicit(&g_tiny_class_policy_profile_auto, 0, memory_order_release);
+        return "larson_guard";
     } else if (strcasecmp(profile, "auto") == 0) {
         tiny_class_policy_set_auto();
         return "auto";
@@ -84,16 +105,20 @@ static const char* tiny_class_policy_set_profile(const char* profile) {
 }
 
 void tiny_class_policy_dump(const char* tag) {
+    if (!tiny_policy_log_enabled()) {
+        return;
+    }
     const char* header = tag ? tag : "[POLICY_DUMP]";
     fprintf(stderr, "%s\n", header);
     for (int cls = 0; cls < TINY_NUM_CLASSES; cls++) {
         TinyClassPolicy* p = &g_tiny_class_policy[cls];
         fprintf(stderr,
-                "  C%d: page=%u warm=%u cap=%u\n",
+                "  C%d: page=%u warm=%u cap=%u tls_carve=%u\n",
                 cls,
                 p->page_box_enabled,
                 p->warm_enabled,
-                p->warm_cap);
+                p->warm_cap,
+                p->tls_carve_enabled);
     }
 }
 
@@ -105,8 +130,13 @@ void tiny_class_policy_init_once(void) {
     const char* profile = getenv("HAKMEM_TINY_POLICY_PROFILE");
     const char* active_profile = tiny_class_policy_set_profile(profile);
 
+    if (atomic_exchange_explicit(&g_tiny_class_policy_mem_recorded, 1, memory_order_acq_rel) == 0) {
+        tiny_mem_stats_add_policy_stats((ssize_t)sizeof(g_tiny_class_policy));
+    }
+
     // 1-shot ダンプでポリシーの内容を可視化（デバッグ用）
-    if (atomic_exchange_explicit(&g_tiny_class_policy_logged, 1, memory_order_acq_rel) == 0) {
+    if (tiny_policy_log_enabled() &&
+        atomic_exchange_explicit(&g_tiny_class_policy_logged, 1, memory_order_acq_rel) == 0) {
         fprintf(stderr, "[POLICY_INIT] profile=%s\n", active_profile);
         tiny_class_policy_dump(NULL);
     }
@@ -121,3 +151,8 @@ void tiny_class_policy_refresh_auto(void) {
     }
     tiny_policy_learner_tick();
 }
+
+int tiny_class_policy_is_auto(void) {
+    tiny_class_policy_init_once();
+    return atomic_load_explicit(&g_tiny_class_policy_profile_auto, memory_order_acquire);
+}