Revert: Raise minimum threshold for treating an allocation as cold.

PiperOrigin-RevId: 769316427
Change-Id: I309f57a4d740c4421a971f0b1301b00f6c7cbdb2

Author: Snehasish Kumar

tcmalloc/malloc_extension.h

@@ -65,7 +65,7 @@ namespace tcmalloc {
 using hot_cold_t = __hot_cold_t;
 
 constexpr hot_cold_t kDefaultMinHotAccessHint =
-    static_cast<tcmalloc::hot_cold_t>(2);
+    static_cast<tcmalloc::hot_cold_t>(1);
 
 }  // namespace tcmalloc
 

tcmalloc/testing/get_stats_test.cc

@@ -137,7 +137,7 @@ TEST_F(GetStatsTest, Pbtxt) {
   }
 
   EXPECT_THAT(buf, HasSubstr("tcmalloc_release_pages_from_huge_region: true"));
-  EXPECT_THAT(buf, HasSubstr("min_hot_access_hint: 2"));
+  EXPECT_THAT(buf, HasSubstr("min_hot_access_hint: 1"));
 
   sized_delete(alloc, kSize);
 }
@@ -244,7 +244,7 @@ TEST_F(GetStatsTest, Parameters) {
         pbtxt,
         HasSubstr(
             R"(tcmalloc_cache_demand_release_long_interval_ns: 5000000000)"));
-    EXPECT_THAT(pbtxt, HasSubstr(R"(min_hot_access_hint: 2)"));
+    EXPECT_THAT(pbtxt, HasSubstr(R"(min_hot_access_hint: 1)"));
   }
 
   Parameters::set_hpaa_subrelease(true);