add a tool to read numa node physical address range

Author: owenlly

benchmark/basic_performance/build/cache_test/misc/numa_info/Makefile

@@ -0,0 +1,23 @@
+obj-m += numa_info.o
+
+all:
+	@echo "Building kernel module..."
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+	@echo "Checking if numa_info module is loaded..."
+	@if lsmod | grep -q numa_info; then \
+		echo "Unloading existing numa_info module..."; \
+		sudo rmmod numa_info; \
+	fi
+	@echo "Loading numa_info module..."
+	sudo insmod numa_info.ko
+	@echo "Checking kernel logs for numa_info_init..."
+	sudo dmesg | grep numa_info_init
+
+clean:
+	@echo "Cleaning up..."
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
+	@echo "Checking if numa_info module is loaded..."
+	@if lsmod | grep -q numa_info; then \
+		echo "Unloading numa_info module..."; \
+		sudo rmmod numa_info; \
+	fi

benchmark/basic_performance/build/cache_test/misc/numa_info/numa_info.c

@@ -0,0 +1,34 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/numa.h>
+
+static int __init numa_info_init(void)
+{
+    int i, online_numa_node_count;
+    unsigned long long node_start_t, node_end_t;
+
+    online_numa_node_count = num_online_nodes();
+    pr_info("%s: Total online NUMA nodes: %d\n", __func__, online_numa_node_count);
+
+    for (i = 0; i < online_numa_node_count; i++) {
+        node_start_t = (unsigned long long)node_start_pfn(i) << PAGE_SHIFT;
+        node_end_t = (unsigned long long)node_end_pfn(i) << PAGE_SHIFT;
+        pr_info("%s: NUMA node [%d] start [0x%llx] end [0x%llx]\n",
+                __func__, i, node_start_t, node_end_t);
+    }
+
+    return 0;
+}
+
+static void __exit numa_info_exit(void)
+{
+    pr_info("%s: Module unloaded\n", __func__);
+}
+
+module_init(numa_info_init);
+module_exit(numa_info_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("CXL_Perf");
+MODULE_DESCRIPTION("Print NUMA node physical address ranges");