From 96c2988381e67cd11812cd3cb402339407a512c6 Mon Sep 17 00:00:00 2001
From: "Moe Charm (CI)" <moecharm@example.com>
Date: Fri, 5 Dec 2025 20:56:20 +0900
Subject: [PATCH] Bench: add C7-only mode for warm TLS tests

---
 bench_random_mixed.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/bench_random_mixed.c b/bench_random_mixed.c
index 0ffa2754..8abf2399 100644
--- a/bench_random_mixed.c
+++ b/bench_random_mixed.c
@@ -41,6 +41,16 @@ static inline uint32_t xorshift32(uint32_t* s){
   uint32_t x=*s; x^=x<<13; x^=x>>17; x^=x<<5; *s=x; return x;
 }
 
+// Debug helper: C7 専用ベンチモード (ENV: HAKMEM_BENCH_C7_ONLY=1)
+static int bench_mode_c7_only = -1;
+static inline int bench_is_c7_only_mode(void) {
+  if (bench_mode_c7_only == -1) {
+    const char* e = getenv("HAKMEM_BENCH_C7_ONLY");
+    bench_mode_c7_only = (e && *e && *e != '0') ? 1 : 0;
+  }
+  return bench_mode_c7_only;
+}
+
 int main(int argc, char** argv){
   int cycles = (argc>1)? atoi(argv[1]) : 10000000; // total ops (10M for steady-state measurement)
   int ws     = (argc>2)? atoi(argv[2]) : 8192;     // working-set slots
@@ -77,6 +87,12 @@ int main(int argc, char** argv){
   if (min_size < 1) min_size = 1;
   if (max_size < min_size) max_size = min_size;
 
+  // C7 専用モード: サイズを C7 帯に固定（現行 C7 ブロックサイズ ≈ 1024B）
+  if (bench_is_c7_only_mode()) {
+    min_size = 1024;
+    max_size = 1024;
+  }
+
   if (cycles <= 0) cycles = 1;
   if (ws <= 0) ws = 1024;