Add --serial mode to dm, runs unit tests serially

infra/bots/recipes/swarm_test.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 # Recipe module for Skia Swarming test.
 
 
 DEPS = [
   'build/file',
@@ skipping 302 matching lines @@
 
   if 'ANGLE' in bot and 'Debug' in bot:
     match.append('~GLPrograms') # skia:4717
 
   if 'MSAN' in bot:
     match.extend(['~Once', '~Shared'])  # Not sure what's up with these tests.
 
   if 'TSAN' in bot:
     match.extend(['~ReadWriteAlpha'])   # Flaky on TSAN-covered on nvidia bots.
 
+  if 'x86_64' in bot or 'Arm64' in bot: # Only run test on 32-bit bots.
+    match.append('~ColorSpaceCRBug')
+
+  # For memory intensive tests that we don't want to run multi-threaded.
+  solo = []
+  solo.append('ColorSpaceCRBug')
+
   if blacklist:
     args.append('--blacklist')
     args.extend(blacklist)
 
   if match:
     args.append('--match')
     args.extend(match)
 
+  if solo:
+    args.append('--solo')
+    args.extend(solo)
+
   # These bots run out of memory running RAW codec tests. Do not run them in
   # parallel
   if ('NexusPlayer' in bot or 'Nexus5' in bot or 'Nexus9' in bot
       or 'Win8-MSVC-ShuttleB' in bot):
     args.append('--noRAW_threading')
 
   return args
 
 
 def key_params(api):
@@ skipping 513 matching lines @@
         api.path['slave_build'].join('skia', 'infra', 'bots', 'assets',
                                      'skimage', 'VERSION'),
         api.path['slave_build'].join('skia', 'infra', 'bots', 'assets',
                                      'skp', 'VERSION'),
         api.path['slave_build'].join('skia', 'infra', 'bots', 'assets',
                                      'svg', 'VERSION'),
         api.path['slave_build'].join('tmp', 'uninteresting_hashes.txt')
     ) +
     api.platform('win', 64)
   )