diff --git a/cmd/dm.c b/cmd/dm.c
index 0c7554a..eb40f08 100644
--- a/cmd/dm.c
+++ b/cmd/dm.c
@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <dm/root.h>
 #include <dm/util.h>
 
 static int do_dm_dump_driver_compat(struct cmd_tbl *cmdtp, int flag, int argc,
@@ -34,6 +35,19 @@
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(DM_STATS)
+static int do_dm_dump_mem(struct cmd_tbl *cmdtp, int flag, int argc,
+			  char *const argv[])
+{
+	struct dm_stats mem;
+
+	dm_get_mem(&mem);
+	dm_dump_mem(&mem);
+
+	return 0;
+}
+#endif /* DM_STATS */
+
 static int do_dm_dump_static_driver_info(struct cmd_tbl *cmdtp, int flag,
 					 int argc, char * const argv[])
 {
@@ -58,11 +72,20 @@
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(DM_STATS)
+#define DM_MEM_HELP	"dm mem           Provide a summary of memory usage\n"
+#define DM_MEM		U_BOOT_SUBCMD_MKENT(mem, 1, 1, do_dm_dump_mem),
+#else
+#define DM_MEM_HELP
+#define DM_MEM
+#endif
+
 #if CONFIG_IS_ENABLED(SYS_LONGHELP)
 static char dm_help_text[] =
 	"compat        Dump list of drivers with compatibility strings\n"
 	"dm devres        Dump list of device resources for each device\n"
 	"dm drivers       Dump list of drivers with uclass and instances\n"
+	DM_MEM_HELP
 	"dm static        Dump list of drivers with static platform data\n"
 	"dn tree          Dump tree of driver model devices ('*' = activated)\n"
 	"dm uclass        Dump list of instances for each uclass"
@@ -73,6 +96,7 @@
 	U_BOOT_SUBCMD_MKENT(compat, 1, 1, do_dm_dump_driver_compat),
 	U_BOOT_SUBCMD_MKENT(devres, 1, 1, do_dm_dump_devres),
 	U_BOOT_SUBCMD_MKENT(drivers, 1, 1, do_dm_dump_drivers),
+	DM_MEM
 	U_BOOT_SUBCMD_MKENT(static, 1, 1, do_dm_dump_static_driver_info),
 	U_BOOT_SUBCMD_MKENT(tree, 1, 1, do_dm_dump_tree),
 	U_BOOT_SUBCMD_MKENT(uclass, 1, 1, do_dm_dump_uclass));
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 9b9a714..97dc699 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -75,6 +75,17 @@
 	help
 	  Say Y here if you want to compile in debug messages in DM core.
 
+config DM_STATS
+	bool "Collect and show driver model stats"
+	depends on DM
+	default y if SANDBOX
+	help
+	  Enable this to collect and display memory statistics about driver
+	  model. This can help to figure out where all the memory is going and
+	  to find optimisations.
+
+	  To display the memory stats, use the 'dm mem' command.
+
 config DM_DEVICE_REMOVE
 	bool "Support device removal"
 	depends on DM
diff --git a/drivers/core/dump.c b/drivers/core/dump.c
index e434fe0..1c1f7e4 100644
--- a/drivers/core/dump.c
+++ b/drivers/core/dump.c
@@ -172,3 +172,76 @@
 	for (entry = drv; entry != drv + n_ents; entry++)
 		printf("%-25.25s %p\n", entry->name, entry->plat);
 }
+
+void dm_dump_mem(struct dm_stats *stats)
+{
+	int total, total_delta;
+	int i;
+
+	/* Support SPL printf() */
+	printf("Struct sizes: udevice %x, driver %x, uclass %x, uc_driver %x\n",
+	       (int)sizeof(struct udevice), (int)sizeof(struct driver),
+	       (int)sizeof(struct uclass), (int)sizeof(struct uclass_driver));
+	printf("Memory: device %x:%x, device names %x, uclass %x:%x\n",
+	       stats->dev_count, stats->dev_size, stats->dev_name_size,
+	       stats->uc_count, stats->uc_size);
+	printf("\n");
+	printf("%-15s  %5s  %5s  %5s  %5s  %5s\n", "Attached type", "Count",
+	       "Size", "Cur", "Tags", "Save");
+	printf("%-15s  %5s  %5s  %5s  %5s  %5s\n", "---------------", "-----",
+	       "-----", "-----", "-----", "-----");
+	total_delta = 0;
+	for (i = 0; i < DM_TAG_ATTACH_COUNT; i++) {
+		int cur_size, new_size, delta;
+
+		cur_size = stats->dev_count * sizeof(struct udevice);
+		new_size = stats->dev_count * (sizeof(struct udevice) -
+			sizeof(void *));
+		/*
+		 * Let's assume we can fit each dmtag_node into 32 bits. We can
+		 * limit the 'tiny tags' feature to SPL with
+		 * CONFIG_SPL_SYS_MALLOC_F_LEN <= 64KB, so needing 14 bits to
+		 * point to anything in that region (with 4-byte alignment).
+		 * So:
+		 *    4 bits for tag
+		 *    14 bits for offset of dev
+		 *    14 bits for offset of data
+		 */
+		new_size += stats->attach_count[i] * sizeof(u32);
+		delta = cur_size - new_size;
+		total_delta += delta;
+		printf("%-16s %5x %6x %6x %6x %6x (%d)\n", tag_get_name(i),
+		       stats->attach_count[i], stats->attach_size[i],
+		       cur_size, new_size, delta > 0 ? delta : 0, delta);
+	}
+	printf("%-16s %5x %6x\n", "uclass", stats->uc_attach_count,
+	       stats->uc_attach_size);
+	printf("%-16s %5x %6x  %5s  %5s  %6x (%d)\n", "Attached total",
+	       stats->attach_count_total + stats->uc_attach_count,
+	       stats->attach_size_total + stats->uc_attach_size, "", "",
+	       total_delta > 0 ? total_delta : 0, total_delta);
+	printf("%-16s %5x %6x\n", "tags", stats->tag_count, stats->tag_size);
+	printf("\n");
+	printf("Total size: %x (%d)\n", stats->total_size, stats->total_size);
+	printf("\n");
+
+	total = stats->total_size;
+	total -= total_delta;
+	printf("With tags:       %x (%d)\n", total, total);
+
+	/* Use singly linked lists in struct udevice (3 nodes in each) */
+	total -= sizeof(void *) * 3 * stats->dev_count;
+	printf("- singly-linked: %x (%d)\n", total, total);
+
+	/* Use an index into the struct_driver list instead of a pointer */
+	total = total + stats->dev_count * (1 - sizeof(void *));
+	printf("- driver index:  %x (%d)\n", total, total);
+
+	/* Same with the uclass */
+	total = total + stats->dev_count * (1 - sizeof(void *));
+	printf("- uclass index:  %x (%d)\n", total, total);
+
+	/* Drop the device name */
+	printf("Drop device name (not SRAM): %x (%d)\n", stats->dev_name_size,
+	       stats->dev_name_size);
+}
diff --git a/drivers/core/tag.c b/drivers/core/tag.c
index 2961725..a3c5cb7 100644
--- a/drivers/core/tag.c
+++ b/drivers/core/tag.c
@@ -16,6 +16,24 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static const char *const tag_name[] = {
+	[DM_TAG_PLAT]		= "plat",
+	[DM_TAG_PARENT_PLAT]	= "parent_plat",
+	[DM_TAG_UC_PLAT]	= "uclass_plat",
+
+	[DM_TAG_PRIV]		= "priv",
+	[DM_TAG_PARENT_PRIV]	= "parent_priv",
+	[DM_TAG_UC_PRIV]	= "uclass_priv",
+	[DM_TAG_DRIVER_DATA]	= "driver_data",
+
+	[DM_TAG_EFI]		= "efi",
+};
+
+const char *tag_get_name(enum dm_tag_t tag)
+{
+	return tag_name[tag];
+}
+
 int dev_tag_set_ptr(struct udevice *dev, enum dm_tag_t tag, void *ptr)
 {
 	struct dmtag_node *node;
diff --git a/include/dm/root.h b/include/dm/root.h
index 382f83c..b2f30a8 100644
--- a/include/dm/root.h
+++ b/include/dm/root.h
@@ -182,7 +182,7 @@
 /**
  * dm_get_mem() - Get stats on memory usage in driver model
  *
- * @mem: Place to put the information
+ * @stats: Place to put the information
  */
 void dm_get_mem(struct dm_stats *stats);
 
diff --git a/include/dm/tag.h b/include/dm/tag.h
index 1ea3c9f..745088f 100644
--- a/include/dm/tag.h
+++ b/include/dm/tag.h
@@ -129,4 +129,12 @@
  */
 void dev_tag_collect_stats(struct dm_stats *stats);
 
+/**
+ * tag_get_name() - Get the name of a tag
+ *
+ * @tag: Tag to look up, which must be valid
+ * Returns: Name of tag
+ */
+const char *tag_get_name(enum dm_tag_t tag);
+
 #endif /* _DM_TAG_H */
diff --git a/include/dm/util.h b/include/dm/util.h
index c52daa8..e10c606 100644
--- a/include/dm/util.h
+++ b/include/dm/util.h
@@ -6,6 +6,8 @@
 #ifndef __DM_UTIL_H
 #define __DM_UTIL_H
 
+struct dm_stats;
+
 #if CONFIG_IS_ENABLED(DM_WARN)
 #define dm_warn(fmt...) log(LOGC_DM, LOGL_WARNING, ##fmt)
 #else
@@ -48,6 +50,13 @@
 /* Dump out a list of drivers with static platform data */
 void dm_dump_static_driver_info(void);
 
+/**
+ * dm_dump_mem() - Dump stats on memory usage in driver model
+ *
+ * @mem: Stats to dump
+ */
+void dm_dump_mem(struct dm_stats *stats);
+
 #if CONFIG_IS_ENABLED(OF_PLATDATA_INST) && CONFIG_IS_ENABLED(READ_ONLY)
 void *dm_priv_to_rw(void *priv);
 #else