Bug 1667104 [wpt PR 25773] - Increase maximum open files for each ser…

…ver process on Darwin (WebKit export), a=testonly

Automatic update from web-platform-tests
Increase the maximum number of open files for wpt's servers https://bugs.webkit.org/show_bug.cgi?id=215829

Patch by Sam Sneddon <gsneddersapple.com> on 2020-09-21
Reviewed by Youenn Fablet.

macOS has a much lower limits than other OSes by default, and the iOS bots often run into it with their level of parallel test execution. This bumps the limit for each wptserve process up to 2048, which is double the limit on Debian, and should probably be safe.

* web-platform-tests/tools/serve/serve.py:
(ServerProc.create_daemon):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk267354 268f45cc-cd09-0410-ab3c-d52691b4dbfc

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REGRESSION(r267354): Only import resource module on Darwin https://bugs.webkit.org/show_bug.cgi?id=216823

Patch by Sam Sneddon <gsneddersapple.com> on 2020-09-22
Reviewed by Darin Adler.

* web-platform-tests/tools/serve/serve.py:
Move the resource import to the local point behind the Darwin platform
test. This code is only run once per process initiation, hence it makes
no difference to have the import locally.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk267417 268f45cc-cd09-0410-ab3c-d52691b4dbfc

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wpt-commits: 64cdc2d8769e69f9b08bdff153e973a88aa015aa, b3b32e61d700d3bd9877c755e3aa943b0c468e0c
wpt-pr: 25773

UltraBlame original commit: 28a042a6bb19b9730a9fa3089101e6e795d8942f

testing/web-platform/tests/tools/serve/serve.py

@@ -418,6 +418,19 @@ def start(self, init_func, host, port, paths, routes, bind_address, config, **kw
 
     def create_daemon(self, init_func, host, port, paths, routes, bind_address,
                       config, **kwargs):
+        if sys.platform == "darwin":
+
+
+            import resource  
+            maxfilesperproc = int(subprocess.check_output(
+                ["sysctl", "-n", "kern.maxfilesperproc"]
+            ).strip())
+            soft, hard = resource.getrlimit(resource.RLIMIT_NOFILE)
+
+
+            new_soft = min(2048, maxfilesperproc, hard)
+            if soft < new_soft:
+                resource.setrlimit(resource.RLIMIT_NOFILE, (new_soft, hard))
         try:
             self.daemon = init_func(host, port, paths, routes, bind_address, config, **kwargs)
         except socket.error: