Messages in this thread Patch in this message | | | From | Dimitris Papastamos <> | Subject | [PATCH v2] regmap: Expose total memory consumption in the rbtree debugfs entry | Date | Tue, 12 Mar 2013 17:26:49 +0000 |
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Provide a feel of how much overhead the rbtree cache adds to the game.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> --- Print the size in bytes instead of kB.
drivers/base/regmap/regcache-rbtree.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 461cff8..11011ec 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -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, memory overhead %zuB\n", + nodes, registers, average, mem_size); map->unlock(map); -- 1.8.1.5
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