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Commit 42e59d7d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarIngo Molnar <mingo@elte.hu>
parent 064739bc

tools/perf/builtin-record.c

+26 −26
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ static long default_interval = 100000; 
static int			nr_cpus				=      0;

static unsigned int		page_size;

static unsigned int		mmap_pages			=    128;

static int			freq				= 0;

static int			freq				=   1000;

static int			output;

static const char		*output_name			= "perf.data";

static int			group				=      0;
@@ -52,20 +52,20 @@ static int sample_address = 0; 
static int			multiplex			=      0;

static int			multiplex_fd			=     -1;



static long			samples;

static long			samples				=      0;

static struct timeval		last_read;

static struct timeval		this_read;



static u64			bytes_written;

static u64			bytes_written			=      0;



static struct pollfd		event_array[MAX_NR_CPUS * MAX_COUNTERS];



static int			nr_poll;

static int			nr_cpu;

static int			nr_poll				=      0;

static int			nr_cpu				=      0;



static int			file_new			=      1;



struct perf_header		*header;

struct perf_header		*header				=   NULL;



struct mmap_data {

	int			counter;

tools/perf/builtin-top.c

+19 −19
Original line number Diff line number Diff line
@@ -70,11 +70,11 @@ 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 int			freq				=   1000; /* 1 KHz */



static int			delay_secs			=      2;

static int			zero;

static int			dump_symtab;

static int			zero                            =      0;

static int			dump_symtab                     =      0;



/*

 * Source