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| author | Jiri Olsa <jolsa@kernel.org> | 2018-07-19 16:33:42 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-07-24 14:53:31 -0300 |
| commit | f8b2ebb532e0553b60ae5ad1b84d1d4f0c285752 (patch) | |
| tree | 94ea4d056801bcee2db596675d746521c248791a /tools/perf/util/machine.c | |
| parent | e8fedff1cc729fd227924305152ccc6f580e8c83 (diff) | |
| download | linux-stable-f8b2ebb532e0553b60ae5ad1b84d1d4f0c285752.tar.gz linux-stable-f8b2ebb532e0553b60ae5ad1b84d1d4f0c285752.tar.bz2 linux-stable-f8b2ebb532e0553b60ae5ad1b84d1d4f0c285752.zip | |
perf machine: Add threads__get_last_match function
Separating threads::last_match cache read/check into separate
threads__get_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/20180719143345.12963-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.c')
| -rw-r--r-- | tools/perf/util/machine.c | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 22dbb6612b41..df41aa1a4cf9 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -408,23 +408,16 @@ out_err: } /* - * Caller must eventually drop thread->refcnt returned with a successful - * lookup/new thread inserted. + * Front-end cache - TID lookups come in blocks, + * so most of the time we dont have to look up + * the full rbtree: */ -static struct thread *____machine__findnew_thread(struct machine *machine, - struct threads *threads, - pid_t pid, pid_t tid, - bool create) +static struct thread* +threads__get_last_match(struct threads *threads, struct machine *machine, + int pid, int tid) { - struct rb_node **p = &threads->entries.rb_node; - struct rb_node *parent = NULL; struct thread *th; - /* - * Front-end cache - TID lookups come in blocks, - * so most of the time we dont have to look up - * the full rbtree: - */ th = threads->last_match; if (th != NULL) { if (th->tid == tid) { @@ -435,6 +428,26 @@ static struct thread *____machine__findnew_thread(struct machine *machine, threads->last_match = NULL; } + return NULL; +} + +/* + * Caller must eventually drop thread->refcnt returned with a successful + * lookup/new thread inserted. + */ +static struct thread *____machine__findnew_thread(struct machine *machine, + struct threads *threads, + pid_t pid, pid_t tid, + bool create) +{ + struct rb_node **p = &threads->entries.rb_node; + struct rb_node *parent = NULL; + struct thread *th; + + th = threads__get_last_match(threads, machine, pid, tid); + if (th) + return th; + while (*p != NULL) { parent = *p; th = rb_entry(parent, struct thread, rb_node); |