perf tools: Default to 1 KHz auto-sampling freq events
Use auto-freq events by default in perf record and
perf top.
This allows more consistent hardware event sampling,
regardless of the intensity of the underlying event.
It also keeps us from over-sampling on larger/busier
systems.
(also make surrounding initializations more consistent)
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index c574c5b..d978dc9 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -55,26 +55,26 @@
static int fd[MAX_NR_CPUS][MAX_COUNTERS];
-static int system_wide = 0;
+static int system_wide = 0;
static int default_interval = 100000;
-static int count_filter = 5;
-static int print_entries = 15;
+static int count_filter = 5;
+static int print_entries = 15;
-static int target_pid = -1;
-static int inherit = 0;
-static int profile_cpu = -1;
-static int nr_cpus = 0;
-static unsigned int realtime_prio = 0;
-static int group = 0;
+static int target_pid = -1;
+static int inherit = 0;
+static int profile_cpu = -1;
+static int nr_cpus = 0;
+static unsigned int realtime_prio = 0;
+static int group = 0;
static unsigned int page_size;
-static unsigned int mmap_pages = 16;
-static int freq = 0;
+static unsigned int mmap_pages = 16;
+static int freq = 1000; /* 1 KHz */
-static int delay_secs = 2;
-static int zero;
-static int dump_symtab;
+static int delay_secs = 2;
+static int zero = 0;
+static int dump_symtab = 0;
/*
* Source
@@ -87,11 +87,11 @@
struct source_line *next;
};
-static char *sym_filter = NULL;
-struct sym_entry *sym_filter_entry = NULL;
-static int sym_pcnt_filter = 5;
-static int sym_counter = 0;
-static int display_weighted = -1;
+static char *sym_filter = NULL;
+struct sym_entry *sym_filter_entry = NULL;
+static int sym_pcnt_filter = 5;
+static int sym_counter = 0;
+static int display_weighted = -1;
/*
* Symbols