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perf machine: Add threads__set_last_match function 

Separating threads::last_match cache set into separate
threads__set_last_match function.  This will be useful in following
patch.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Lukasz Odzioba <lukasz.odzioba@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20180719143345.12963-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Jiri Olsa 2018-07-19 16:33:43 +02:00 committed by Arnaldo Carvalho de Melo
parent f8b2ebb532
commit 67fda0f32c
1 changed files with 9 additions and 3 deletions
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12
tools/perf/util/machine.c
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@ -431,6 +431,12 @@ threads__get_last_match(struct threads *threads, struct machine *machine,
return NULL;
}
static void
threads__set_last_match(struct threads *threads, struct thread *th)
{
threads->last_match = th;
}
/*
* Caller must eventually drop thread->refcnt returned with a successful
* lookup/new thread inserted.
@ -453,7 +459,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine,
th = rb_entry(parent, struct thread, rb_node);
if (th->tid == tid) {
threads->last_match = th;
threads__set_last_match(threads, th);
machine__update_thread_pid(machine, th, pid);
return thread__get(th);
}
@ -490,7 +496,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine,
* It is now in the rbtree, get a ref
*/
thread__get(th);
threads->last_match = th;
threads__set_last_match(threads, th);
++threads->nr;
}
@ -1648,7 +1654,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th,
struct threads *threads = machine__threads(machine, th->tid);
if (threads->last_match == th)
threads->last_match = NULL;
threads__set_last_match(threads, NULL);
BUG_ON(refcount_read(&th->refcnt) == 0);
if (lock)