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

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

[Slightly reworded output in debugfs -- broonie]

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos 2013-03-12 17:26:49 +00:00 committed by Mark Brown
parent eb4cb76ff0
commit a42277c739
1 changed files with 7 additions and 2 deletions
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9
drivers/base/regmap/regcache-rbtree.c
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@ -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);