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authorMike Galbraith <efault@gmx.de>2009-07-21 10:30:36 +0200
committerPeter Zijlstra <a.p.zijlstra@chello.nl>2009-07-22 18:05:58 +0200
commit0fdc7e67dd312986e30b861adff48732bd33eb3f (patch)
tree5d5133f36e3f20d174f0754defca47d244224e7c /tools
parentd20ff6bd6bba2e7e6681fa17565347b410c46ab3 (diff)
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perf_counter tools: Give perf top inherit option
Currently, perf top -p only tracks the pid provided, which isn't very useful for watching forky loads, so give it an inherit option. Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1248165036.9795.10.camel@marge.simson.net>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-top.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 95d5c0ae375..c0a423004e1 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -58,6 +58,7 @@ static u64 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;
@@ -549,7 +550,7 @@ int group_fd;
static void start_counter(int i, int counter)
{
struct perf_counter_attr *attr;
- unsigned int cpu;
+ int cpu;
cpu = profile_cpu;
if (target_pid == -1 && profile_cpu == -1)
@@ -559,6 +560,7 @@ static void start_counter(int i, int counter)
attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
attr->freq = freq;
+ attr->inherit = (cpu < 0) && inherit;
try_again:
fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0);
@@ -685,6 +687,8 @@ static const struct option options[] = {
"only display functions with more events than this"),
OPT_BOOLEAN('g', "group", &group,
"put the counters into a counter group"),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
OPT_STRING('s', "sym-filter", &sym_filter, "pattern",
"only display symbols matchig this pattern"),
OPT_BOOLEAN('z', "zero", &zero,