perf tools: Allow multiple threads or processes in record, stat, top

Allow a user to collect events for multiple threads or processes
using a comma separated list.

e.g., collect data on a VM and its vhost thread:
  perf top -p 21483,21485
  perf stat -p 21483,21485 -ddd
  perf record -p 21483,21485

or monitoring vcpu threads
  perf top -t 21488,21489
  perf stat -t 21488,21489 -ddd
  perf record -t 21488,21489

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1328718772-16688-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/tools/perf/util/top.c b/tools/perf/util/top.c
index e4370ca27193..09fe579ccafb 100644
--- a/tools/perf/util/top.c
+++ b/tools/perf/util/top.c
@@ -69,11 +69,11 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 
         ret += SNPRINTF(bf + ret, size - ret, "], ");
 
-        if (top->target_pid != -1)
-                ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %d",
+        if (top->target_pid)
+                ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
                                 top->target_pid);
-        else if (top->target_tid != -1)
-                ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %d",
+        else if (top->target_tid)
+                ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
                                 top->target_tid);
         else if (top->uid_str != NULL)
                 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
@@ -85,7 +85,7 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
                 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
                                 top->evlist->cpus->nr > 1 ? "s" : "", top->cpu_list);
         else {
-                if (top->target_tid != -1)
+                if (top->target_tid)
                         ret += SNPRINTF(bf + ret, size - ret, ")");
                 else
                         ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",