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Subject[PATCH 3/6] perf lock: Sort map info based on class name
Date
Instead of the random order, sort it by lock class name.

Before:
# perf lock info -m
Address of instance: name of class
0xffffa0d940ac5310: &dentry->d_lockref.lock
0xffffa0c20b0e1cb0: &dentry->d_lockref.lock
0xffffa0d8e051cc48: &base->lock
0xffffa0d94f992110: &anon_vma->rwsem
0xffffa0d947a4f278: (null)
0xffffa0c208f6e108: &map->lock
0xffffa0c213ad32c8: &cfs_rq->removed.lock
0xffffa0c20d695888: &parent->list_lock
0xffffa0c278775278: (null)
0xffffa0c212ad4690: &dentry->d_lockref.lock

After:
# perf lock info -m
Address of instance: name of class
0xffffa0c20d538800: &(&sig->stats_lock)->lock
0xffffa0c216d4ec40: &(&sig->stats_lock)->lock
0xffffa1fe4cb04610: &(__futex_data.queues)[i].lock
0xffffa1fe4cb07750: &(__futex_data.queues)[i].lock
0xffffa1fe4cb07b50: &(__futex_data.queues)[i].lock
0xffffa1fe4cb0b850: &(__futex_data.queues)[i].lock
0xffffa1fe4cb0bcd0: &(__futex_data.queues)[i].lock
0xffffa1fe4cb0e5d0: &(__futex_data.queues)[i].lock
0xffffa1fe4cb11ad0: &(__futex_data.queues)[i].lock

Acked-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/builtin-lock.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index c4b5c3d71ae3..8078f7ca826d 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -757,6 +757,21 @@ static void dump_threads(void)
}
}

+static int compare_maps(struct lock_stat *a, struct lock_stat *b)
+{
+ int ret;
+
+ if (a->name && b->name)
+ ret = strcmp(a->name, b->name);
+ else
+ ret = !!a->name - !!b->name;
+
+ if (!ret)
+ return a->addr < b->addr;
+ else
+ return ret < 0;
+}
+
static void dump_map(void)
{
unsigned int i;
@@ -765,9 +780,12 @@ static void dump_map(void)
pr_info("Address of instance: name of class\n");
for (i = 0; i < LOCKHASH_SIZE; i++) {
hlist_for_each_entry(st, &lockhash_table[i], hash_entry) {
- pr_info(" %#llx: %s\n", (unsigned long long)st->addr, st->name);
+ insert_to_result(st, compare_maps);
}
}
+
+ while ((st = pop_from_result()))
+ pr_info(" %#llx: %s\n", (unsigned long long)st->addr, st->name);
}

static int dump_info(void)
--
2.35.0.rc0.227.g00780c9af4-goog
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