perf machine: Add method to loop over threads and invoke handler - kernel/git/tip/tip.git (original) (raw)

perf machine: Add method to loop over threads and invoke handler

Loop over all threads within a machine - including threads moved to the dead threads list -- and invoked a function. This allows commands to run some specific function on each thread (eg., dump statistics) yet hides how the threads are maintained within the machine. Signed-off-by: David Ahern dsahern@gmail.com Cc: Frederic Weisbecker fweisbec@gmail.com Cc: Ingo Molnar mingo@kernel.org Cc: Jiri Olsa jolsa@redhat.com Cc: Namhyung Kim namhyung.kim@lge.com Cc: Peter Zijlstra a.p.zijlstra@chello.nl Cc: Stephane Eranian eranian@google.com Link: http://lkml.kernel.org/r/1380395584-9025-2-git-send-email-dsahern@gmail.comSigned-off-by: Arnaldo Carvalho de Melo acme@redhat.com

2 files changed, 27 insertions, 0 deletions

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index fc14f9bf82c8ce..901397ae82bee9 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c

@@ -1393,3 +1393,26 @@ int machine__resolve_callchain(struct machine *machine,

sample);

}

+int machine__for_each_thread(struct machine *machine,

+ int (*fn)(struct thread *thread, void *p),

+ void *priv)

+{

+ struct rb_node *nd;

+ struct thread *thread;

+ int rc = 0;

+ for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {

+ thread = rb_entry(nd, struct thread, rb_node);

+ rc = fn(thread, priv);

+ if (rc != 0)

+ return rc;

+ }

+ list_for_each_entry(thread, &machine->dead_threads, node) {

+ rc = fn(thread, priv);

+ if (rc != 0)

+ return rc;

+ }

+ return rc;

+}

diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 5150d5e1db6778..d44c09bdc45ea4 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h

@@ -166,4 +166,8 @@ void machines__destroy_kernel_maps(struct machines *machines);

size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);

+int machine__for_each_thread(struct machine *machine,

+ int (*fn)(struct thread *thread, void *p),

+ void *priv);

#endif /* __PERF_MACHINE_H */