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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.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-09-28 13:12:58 -06:00 committed by Arnaldo Carvalho de Melo
parent 5e2485b1a2
commit 35feee19f9
2 changed files with 27 additions and 0 deletions
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23
tools/perf/util/machine.c
View File

@ -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;
}

4
tools/perf/util/machine.h
View File

@ -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 */