Исходники и презентации

lessons/allocator/allocations_offset/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+// For memory blocks larger than 32768 bytes,
+// each of them is always composed of multiple
+// memory pages. The memory page size used by the
+// official standard Go runtime (1.22 versions) is 8192 bytes.
+
+func main() {
+	var data1 [32769]byte
+	var data2 [32769]byte
+
+	data1Pointer := unsafe.Pointer(&data1)
+	data2Pointer := unsafe.Pointer(&data2)
+
+	fmt.Println("adress:", data1Pointer, data2Pointer)
+	fmt.Println("size:", unsafe.Sizeof(data1), unsafe.Sizeof(data2))
+
+	distance := uintptr(data2Pointer) - uintptr(data1Pointer)
+	fmt.Println("distance:", distance)
+	fmt.Println("waste:", distance-unsafe.Sizeof(data1))
+}