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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2009-11-17 18:38:01 -0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-19 06:03:40 +0100 |
| commit | 5a8e5a3065bf04b7673262fd6c46123e4b888d2b (patch) | |
| tree | efd85b86b8904a2a551f603a45e3ec0199ec7539 /tools/perf/builtin-top.c | |
| parent | 51a472decb845e920137284a5cfef51fb7d61206 (diff) | |
| download | lwn-5a8e5a3065bf04b7673262fd6c46123e4b888d2b.tar.gz lwn-5a8e5a3065bf04b7673262fd6c46123e4b888d2b.zip | |
perf top: Allocate space only for the number of counters used
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 <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1258490282-1821-2-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 9 |
1 files 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; |