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Commit a42277c7 authored by Dimitris Papastamos's avatar Dimitris Papastamos Committed by Mark Brown
Browse files

regmap: rbtree Expose total memory consumption in the rbtree debugfs entry 



Provide a feel of how much overhead the rbtree cache adds to
the game.

[Slightly reworded output in debugfs -- broonie]

Signed-off-by: default avatarDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent eb4cb76f

drivers/base/regmap/regcache-rbtree.c

+7 −2
Original line number Diff line number Diff line
@@ -138,15 +138,20 @@ static int rbtree_show(struct seq_file *s, void *ignored) 
	struct regcache_rbtree_node *n;

	struct rb_node *node;

	unsigned int base, top;

	size_t mem_size;

	int nodes = 0;

	int registers = 0;

	int this_registers, average;



	map->lock(map);



	mem_size = sizeof(*rbtree_ctx);



	for (node = rb_first(&rbtree_ctx->root); node != NULL;

	     node = rb_next(node)) {

		n = container_of(node, struct regcache_rbtree_node, node);

		mem_size += sizeof(*n);

		mem_size += (n->blklen * map->cache_word_size);



		regcache_rbtree_get_base_top_reg(map, n, &base, &top);

		this_registers = ((top - base) / map->reg_stride) + 1;
@@ -161,8 +166,8 @@ static int rbtree_show(struct seq_file *s, void *ignored) 
	else

		average = 0;



	seq_printf(s, "%d nodes, %d registers, average %d registers\n",

		   nodes, registers, average);

	seq_printf(s, "%d nodes, %d registers, average %d registers, used %zu bytes\n",

		   nodes, registers, average, mem_size);



	map->unlock(map);