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Posted to commits@couchdb.apache.org by ch...@apache.org on 2020/09/23 21:05:55 UTC
[couchdb] branch main updated: Workaround dirty schedulers in
run_queue stats (#3168)
This is an automated email from the ASF dual-hosted git repository.
chewbranca pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/couchdb.git
The following commit(s) were added to refs/heads/main by this push:
new f190677 Workaround dirty schedulers in run_queue stats (#3168)
f190677 is described below
commit f1906774e727982621a1acd8961a7a0483314ffb
Author: Russell Branca <ch...@apache.org>
AuthorDate: Wed Sep 23 14:05:49 2020 -0700
Workaround dirty schedulers in run_queue stats (#3168)
---
src/chttpd/src/chttpd_node.erl | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/src/chttpd/src/chttpd_node.erl b/src/chttpd/src/chttpd_node.erl
index 1ca4bbd..0159672 100644
--- a/src/chttpd/src/chttpd_node.erl
+++ b/src/chttpd/src/chttpd_node.erl
@@ -15,7 +15,8 @@
-export([
handle_node_req/1,
- get_stats/0
+ get_stats/0,
+ run_queues/0
]).
-include_lib("couch/include/couch_db.hrl").
@@ -212,10 +213,12 @@ get_stats() ->
{CF, CDU} = db_pid_stats(),
MessageQueues0 = [{couch_file, {CF}}, {couch_db_updater, {CDU}}],
MessageQueues = MessageQueues0 ++ message_queues(registered()),
+ {SQ, DCQ} = run_queues(),
[
{uptime, couch_app:uptime() div 1000},
{memory, {Memory}},
- {run_queue, statistics(run_queue)},
+ {run_queue, SQ},
+ {run_queue_dirty_cpu, DCQ},
{ets_table_count, length(ets:all())},
{context_switches, element(1, statistics(context_switches))},
{reductions, element(1, statistics(reductions))},
@@ -287,3 +290,13 @@ message_queues(Registered) ->
{Type, Length} = process_info(whereis(Name), Type),
{Name, Length}
end, Registered).
+
+%% Workaround for https://bugs.erlang.org/browse/ERL-1355
+run_queues() ->
+ case erlang:system_info(dirty_cpu_schedulers) > 0 of
+ false ->
+ {statistics(run_queue), 0};
+ true ->
+ [DCQ | SQs] = lists:reverse(statistics(run_queue_lengths)),
+ {lists:sum(SQs), DCQ}
+ end.