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/evlist.c b/tools/perf/util/evlist.c
index a57a8cfc5d90..5c61dc57d7c7 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -593,15 +593,15 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
         return perf_evlist__mmap_per_cpu(evlist, prot, mask);
 }
 
-int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
-                             pid_t target_tid, uid_t uid, const char *cpu_list)
+int perf_evlist__create_maps(struct perf_evlist *evlist, const char *target_pid,
+                             const char *target_tid, uid_t uid, const char *cpu_list)
 {
-        evlist->threads = thread_map__new(target_pid, target_tid, uid);
+        evlist->threads = thread_map__new_str(target_pid, target_tid, uid);
 
         if (evlist->threads == NULL)
                 return -1;
 
-        if (uid != UINT_MAX || (cpu_list == NULL && target_tid != -1))
+        if (uid != UINT_MAX || (cpu_list == NULL && target_tid))
                 evlist->cpus = cpu_map__dummy_new();
         else
                 evlist->cpus = cpu_map__new(cpu_list);
@@ -820,7 +820,7 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                 exit(-1);
         }
 
-        if (!opts->system_wide && opts->target_tid == -1 && opts->target_pid == -1)
+        if (!opts->system_wide && !opts->target_tid && !opts->target_pid)
                 evlist->threads->map[0] = evlist->workload.pid;
 
         close(child_ready_pipe[1]);