Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754017Ab3CKSF1 (ORCPT ); Mon, 11 Mar 2013 14:05:27 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:54058 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753773Ab3CKSFX (ORCPT ); Mon, 11 Mar 2013 14:05:23 -0400 From: Dimitris Papastamos To: Mark Brown Cc: patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org Subject: [PATCH] regmap: Expose total memory consumption in the rbtree debugfs entry Date: Mon, 11 Mar 2013 18:05:21 +0000 Message-Id: <1363025121-10167-1-git-send-email-dp@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.8.1.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1846 Lines: 53 Provide a feel of how much overhead the rbtree cache adds to the game. Signed-off-by: Dimitris Papastamos --- drivers/base/regmap/regcache-rbtree.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 461cff8..7b732ad 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -138,6 +138,7 @@ 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 = sizeof(*rbtree_ctx); int nodes = 0; int registers = 0; int this_registers, average; @@ -147,6 +148,8 @@ static int rbtree_show(struct seq_file *s, void *ignored) 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 +164,13 @@ 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); + if (mem_size > 1024) + mem_size /= 1024; + else + mem_size = 1; + + seq_printf(s, "%d nodes, %d registers, average %d registers, memory overhead %zukB\n", + nodes, registers, average, mem_size); map->unlock(map); -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/