From 5a8e5a3065bf04b7673262fd6c46123e4b888d2b Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 17 Nov 2009 18:38:01 -0200 Subject: [PATCH] perf top: Allocate space only for the number of counters used MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Reducing memory consumption on a typical desktop machine: From: 32710 root 20 0 172m 142m 1056 S 0.0 4.7 0:00.37 perf To: 420 root 20 0 47528 16m 1056 R 0.3 0.5 0:00.24 perf Signed-off-by: Arnaldo Carvalho de Melo Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1258490282-1821-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/builtin-top.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 0d60c517c0ba..49cf87680fe3 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -111,7 +111,6 @@ static int display_weighted = -1; struct sym_entry { struct rb_node rb_node; struct list_head node; - unsigned long count[MAX_COUNTERS]; unsigned long snap_count; double weight; int skip; @@ -122,6 +121,7 @@ struct sym_entry { struct source_line *lines; struct source_line **lines_tail; pthread_mutex_t source_lock; + unsigned long count[0]; }; /* @@ -130,7 +130,7 @@ struct sym_entry { static inline struct symbol *sym_entry__symbol(struct sym_entry *self) { - return (struct symbol *)(self + 1); + return ((void *)self) + symbol__priv_size; } static void get_term_dimensions(struct winsize *ws) @@ -1314,8 +1314,6 @@ int cmd_top(int argc, const char **argv, const char *prefix __used) { int counter; - symbol__init(sizeof(struct sym_entry)); - page_size = sysconf(_SC_PAGE_SIZE); argc = parse_options(argc, argv, options, top_usage, 0); @@ -1332,6 +1330,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __used) if (!nr_counters) nr_counters = 1; + symbol__init(sizeof(struct sym_entry) + + (nr_counters + 1) * sizeof(unsigned long)); + if (delay_secs < 1) delay_secs = 1; -- 2.30.2