From 99e1d6777f0a27340554379cd5348ed870380457 Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Fri, 4 Dec 2015 14:42:24 +0000
Subject: [PATCH] Add metrics to track the cpu on the main thread consumed by
 each type of request

---
 synapse/http/server.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/synapse/http/server.py b/synapse/http/server.py
index ef75be742..06fb53707 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -53,6 +53,14 @@ response_timer = metrics.register_distribution(
     labels=["method", "servlet"]
 )
 
+response_ru_utime = metrics.register_distribution(
+    "response_ru_utime", labels=["method", "servlet"]
+)
+
+response_ru_stime = metrics.register_distribution(
+    "response_ru_stime", labels=["method", "servlet"]
+)
+
 _next_request_id = 0
 
 
@@ -221,6 +229,15 @@ class JsonResource(HttpServer, resource.Resource):
                 self.clock.time_msec() - start, request.method, servlet_classname
             )
 
+            try:
+                context = LoggingContext.current_context()
+                ru_utime, ru_stime = context.get_resource_usage()
+
+                response_ru_utime.inc_by(ru_utime, request.method, servlet_classname)
+                response_ru_stime.inc_by(ru_stime, request.method, servlet_classname)
+            except:
+                pass
+
             return
 
         # Huh. No one wanted to handle that? Fiiiiiine. Send 400.