From: Eric Wong <e@80x24.org>
To: unicorn-public@bogomips.org
Subject: [PATCH 2/3] test/benchmark/readinput: demo for slowly uploading clients
Date: Sun, 12 May 2019 22:25:46 +0000 [thread overview]
Message-ID: <20190512222547.17542-3-e@80x24.org> (raw)
In-Reply-To: <20190512222547.17542-1-e@80x24.org>
This is intended to demonstrate how badly we suck at dealing
with slow clients making uploads. It can help users evaluate
alternative fully-buffering reverse proxies, because nginx
should not be the only option.
---
test/benchmark/README | 5 +++++
test/benchmark/readinput.ru | 40 +++++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+)
create mode 100644 test/benchmark/readinput.ru
diff --git a/test/benchmark/README b/test/benchmark/README
index e9b7a41..cd929f3 100644
--- a/test/benchmark/README
+++ b/test/benchmark/README
@@ -47,6 +47,11 @@ is NOT our problem. That is the job of nginx (or similar).
Standalone Rack app intended to show how BAD we are at slow clients.
See usage in comments.
+== readinput.ru
+
+Standalone Rack app intended to show how bad we are with slow uploaders.
+See usage in comments.
+
== Contributors
This directory is intended to remain stable. Do not make changes
diff --git a/test/benchmark/readinput.ru b/test/benchmark/readinput.ru
new file mode 100644
index 0000000..c91bec3
--- /dev/null
+++ b/test/benchmark/readinput.ru
@@ -0,0 +1,40 @@
+# This app is intended to test large HTTP requests with or without
+# a fully-buffering reverse proxy such as nginx. Without a fully-buffering
+# reverse proxy, unicorn will be unresponsive when client count exceeds
+# worker_processes.
+
+DOC = <<DOC
+To demonstrate how bad unicorn is at slowly uploading clients:
+
+ # in one terminal, start unicorn with one worker:
+ unicorn -E none -l 127.0.0.1:8080 test/benchmark/readinput.ru
+
+ # in a different terminal, upload 45M from multiple curl processes:
+ dd if=/dev/zero bs=45M count=1 | curl -T- -HExpect: --limit-rate 1M \
+ --trace-time -v http://127.0.0.1:8080/ &
+ dd if=/dev/zero bs=45M count=1 | curl -T- -HExpect: --limit-rate 1M \
+ --trace-time -v http://127.0.0.1:8080/ &
+ wait
+
+# The last client won't see a response until the first one is done uploading
+# You also won't be able to make GET requests to view this documentation
+# while clients are uploading. You can also view the stderr debug output
+# of unicorn (see logging code in #{__FILE__}).
+DOC
+
+run(lambda do |env|
+ input = env['rack.input']
+ buf = ''.b
+
+ # default logger contains timestamps, rely on that so users can
+ # see what the server is doing
+ l = env['rack.logger']
+
+ l.debug('BEGIN reading input ...') if l
+ :nop while input.read(16384, buf)
+ l.debug('DONE reading input ...') if l
+
+ buf.clear
+ [ 200, [ %W(Content-Length #{DOC.size}), %w(Content-Type text/plain) ],
+ [ DOC ] ]
+end)
--
EW
next prev parent reply other threads:[~2019-05-12 22:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-12 22:25 [PATCH 0/3] slow clients and test/benchmark tools Eric Wong
2019-05-12 22:25 ` [PATCH 1/3] test/benchmark/ddstream: demo for slowly reading clients Eric Wong
2019-05-12 22:25 ` Eric Wong [this message]
2019-05-12 22:25 ` [PATCH 3/3] test/benchmark/uconnect: test for accept loop speed Eric Wong
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