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Commit f3b623b8 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf tools: Reference count struct thread 

We need to do that to stop accumulating entries in the dead_threads
linked list, i.e. we were keeping references to threads in struct hists
that continue to exist even after a thread exited and was removed from
the machine threads rbtree.

We still keep the dead_threads list, but just for debugging, allowing us
to iterate at any given point over the threads that still are referenced
by things like struct hist_entry.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-3ejvfyed0r7ue61dkurzjux4@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2ed11312

tools/perf/builtin-sched.c

+1 −1
Original line number Diff line number Diff line
@@ -831,7 +831,7 @@ static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread) 
		return -1;

	}



	atoms->thread = thread;

	atoms->thread = thread__get(thread);

	INIT_LIST_HEAD(&atoms->work_list);

	__thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);

	return 0;

tools/perf/builtin-trace.c

+6 −1
Original line number Diff line number Diff line
@@ -1741,7 +1741,10 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 
	} else

		ttrace->entry_pending = true;



	trace->current = thread;

	if (trace->current != thread) {

		thread__put(trace->current);

		trace->current = thread__get(thread);

	}



	return 0;

}
@@ -2274,6 +2277,8 @@ static int trace__run(struct trace *trace, int argc, const char **argv) 
	}



out_disable:

	thread__zput(trace->current);



	perf_evlist__disable(evlist);



	if (!err) {

tools/perf/ui/browsers/hists.c

+3 −3
Original line number Diff line number Diff line
@@ -1467,7 +1467,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events, 
		perf_hpp__set_user_width(symbol_conf.col_width_list_str);



	while (1) {

		const struct thread *thread = NULL;

		struct thread *thread = NULL;

		const struct dso *dso = NULL;

		int choice = 0,

		    annotate = -2, zoom_dso = -2, zoom_thread = -2,
@@ -1754,13 +1754,13 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events, 
				pstack__remove(fstack, &browser->hists->thread_filter);

zoom_out_thread:

				ui_helpline__pop();

				browser->hists->thread_filter = NULL;

				thread__zput(browser->hists->thread_filter);

				perf_hpp__set_elide(HISTC_THREAD, false);

			} else {

				ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s(%d) thread\"",

						   thread->comm_set ? thread__comm_str(thread) : "",

						   thread->tid);

				browser->hists->thread_filter = thread;

				browser->hists->thread_filter = thread__get(thread);

				perf_hpp__set_elide(HISTC_THREAD, false);

				pstack__push(fstack, &browser->hists->thread_filter);

			}

tools/perf/util/build-id.c

+3 −2
Original line number Diff line number Diff line
@@ -61,8 +61,9 @@ static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused, 


	if (thread) {

		rb_erase(&thread->rb_node, &machine->threads);

		machine->last_match = NULL;

		thread__delete(thread);

		if (machine->last_match == thread)

			thread__zput(machine->last_match);

		thread__put(thread);

	}



	return 0;

tools/perf/util/hist.c

+2 −0
Original line number Diff line number Diff line
@@ -355,6 +355,7 @@ static struct hist_entry *hist_entry__new(struct hist_entry *template, 
			callchain_init(he->callchain);



		INIT_LIST_HEAD(&he->pairs.node);

		thread__get(he->thread);

	}



	return he;
@@ -941,6 +942,7 @@ hist_entry__collapse(struct hist_entry *left, struct hist_entry *right) 


void hist_entry__delete(struct hist_entry *he)

{

	thread__zput(he->thread);

	zfree(&he->branch_info);

	zfree(&he->mem_info);

	zfree(&he->stat_acc);