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* [ANN] unicorn 5.5.2 - Rack HTTP server for fast clients and *nix
@ 2019-12-20  2:15  5% Eric Wong
  0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2019-12-20  2:15 UTC (permalink / raw)
  To: ruby-talk, unicorn-public; +Cc: Terry Scheingeld

unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels.  Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between unicorn and slow clients.

Disclaimer:

Due to its ability to tolerate crashes and isolate clients, unicorn
is unfortunately known to prolong the existence of bugs in applications
and libraries which run on top of it.

Consider this just an announcement to inform existing users of a
new version, not something to convince you to switch to something
that set the entire Ruby back decades in terms of concurrency.

* https://bogomips.org/unicorn/
* public list: unicorn-public@bogomips.org
* mail archives: https://bogomips.org/unicorn-public/
* git clone https://bogomips.org/unicorn.git
* https://bogomips.org/unicorn/NEWS.atom.xml
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.unicorn

Changes:

Thanks to Terry Scheingeld, we now workaround a Ruby bug
and can now run with taint checks enabled:
<https://bugs.ruby-lang.org/issues/14485>
<https://bogomips.org/unicorn-public/CABg1sXrvGv9G6CDQxePDUqTe6N-5UpLXm7eG3YQO=dda-Cgg7A@mail.gmail.com/>

There's also a few documentation updates and building packages
from source is easier since pandoc is no longer a dependency
(and I can no longer afford the bandwidth or space to install
it).

Eric Wong (7):
      test/benchmark/ddstream: demo for slowly reading clients
      test/benchmark/readinput: demo for slowly uploading clients
      test/benchmark/uconnect: test for accept loop speed
      examples/unicorn@.service: note the NonBlocking flag
      Merge remote-tracking branch 'origin/ts/tmpio'
      test_util: get rid of some unused variables in tests
      doc: replace pandoc-"Markdown" with real manpages

Terry Scheingeld (1):
      tmpio: workaround File#path being tainted on unlink

havpbea: orngvat n qrnq ubefr hagvy gur fgvpx trgf fghpx va vg'f fxhyy

^ permalink raw reply	[relevance 5%]

* [PATCH 3/3] test/benchmark/uconnect: test for accept loop speed
  2019-05-12 22:25  7% [PATCH 0/3] slow clients and test/benchmark tools Eric Wong
@ 2019-05-12 22:25  7% ` Eric Wong
  0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2019-05-12 22:25 UTC (permalink / raw)
  To: unicorn-public

In preparation for kgio removal, I want to ensure we can
maintain existing performance when swapping kgio_tryaccept
for accept_nonblock on Ruby 2.3+

There's plenty of TCP benchmarking tools, but TCP port reuse
delays hurt predictability since unicorn doesn't do persistent
connections.

So this is exclusively for Unix sockets and uses Perl instead
of Ruby since I don't want to be bothered with GC
unpredictability on the client side.
---
 test/benchmark/uconnect.perl | 66 ++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100755 test/benchmark/uconnect.perl

diff --git a/test/benchmark/uconnect.perl b/test/benchmark/uconnect.perl
new file mode 100755
index 0000000..230445e
--- /dev/null
+++ b/test/benchmark/uconnect.perl
@@ -0,0 +1,66 @@
+#!/usr/bin/perl -w
+# Benchmark script to spawn some processes and hammer a local unicorn
+# to test accept loop performance.  This only does Unix sockets.
+# There's plenty of TCP benchmarking tools out there, and TCP port reuse
+# has predictability problems since unicorn can't do persistent connections.
+# Written in Perl for the same reason: predictability.
+# Ruby GC is not as predictable as Perl refcounting.
+use strict;
+use Socket qw(AF_UNIX SOCK_STREAM sockaddr_un);
+use POSIX qw(:sys_wait_h);
+use Getopt::Std;
+# -c / -n switches stolen from ab(1)
+my $usage = "$0 [-c CONCURRENCY] [-n NUM_REQUESTS] SOCKET_PATH\n";
+our $opt_c = 2;
+our $opt_n = 1000;
+getopts('c:n:') or die $usage;
+my $unix_path = shift or die $usage;
+use constant REQ => "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n";
+use constant REQ_LEN => length(REQ);
+use constant BUFSIZ => 8192;
+$^F = 99; # don't waste syscall time with FD_CLOEXEC
+
+my %workers; # pid => worker num
+die "-n $opt_n not evenly divisible by -c $opt_c\n" if $opt_n % $opt_c;
+my $n_per_worker = $opt_n / $opt_c;
+my $addr = sockaddr_un($unix_path);
+
+for my $num (1..$opt_c) {
+	defined(my $pid = fork) or die "fork failed: $!\n";
+	if ($pid) {
+		$workers{$pid} = $num;
+	} else {
+		work($n_per_worker);
+	}
+}
+
+reap_worker(0) while scalar keys %workers;
+exit;
+
+sub work {
+	my ($n) = @_;
+	my ($buf, $x);
+	for (1..$n) {
+		socket(S, AF_UNIX, SOCK_STREAM, 0) or die "socket: $!";
+		connect(S, $addr) or die "connect: $!";
+		defined($x = syswrite(S, REQ)) or die "write: $!";
+		$x == REQ_LEN or die "short write: $x != ".REQ_LEN."\n";
+		do {
+			$x = sysread(S, $buf, BUFSIZ);
+			unless (defined $x) {
+				next if $!{EINTR};
+				die "sysread: $!\n";
+			}
+		} until ($x == 0);
+	}
+	exit 0;
+}
+
+sub reap_worker {
+	my ($flags) = @_;
+	my $pid = waitpid(-1, $flags);
+	return if !defined $pid || $pid <= 0;
+	my $p = delete $workers{$pid} || '(unknown)';
+	warn("$pid [$p] exited with $?\n") if $?;
+	$p;
+}
-- 
EW


^ permalink raw reply related	[relevance 7%]

* [PATCH 0/3] slow clients and test/benchmark tools
@ 2019-05-12 22:25  7% Eric Wong
  2019-05-12 22:25  7% ` [PATCH 3/3] test/benchmark/uconnect: test for accept loop speed Eric Wong
  0 siblings, 1 reply; 3+ results
From: Eric Wong @ 2019-05-12 22:25 UTC (permalink / raw)
  To: unicorn-public

Slowloris made waves nearly a decade ago, and there are still
people being misled into using the wrong reverse proxy for
unicorn.  Maybe these new standalone Rack apps can convince
folks to deploy unicorn correctly behind nginx, or better,
evaluate alternatives to nginx :>

Thus ddstream and readinput can help users evaluate
fully-buffering reverse proxies such as nginx, or similar :>

Finally, uconnect is intended to evaluate removal of the kgio
dependency (and maybe future speedups)

  test/benchmark/ddstream: demo for slowly reading clients
  test/benchmark/readinput: demo for slowly uploading clients
  test/benchmark/uconnect: test for accept loop speed

 test/benchmark/README        | 18 +++++++---
 test/benchmark/ddstream.ru   | 50 +++++++++++++++++++++++++++
 test/benchmark/readinput.ru  | 40 ++++++++++++++++++++++
 test/benchmark/uconnect.perl | 66 ++++++++++++++++++++++++++++++++++++
 4 files changed, 170 insertions(+), 4 deletions(-)
 create mode 100644 test/benchmark/ddstream.ru
 create mode 100644 test/benchmark/readinput.ru
 create mode 100755 test/benchmark/uconnect.perl

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atvak ercynprzrag...

^ permalink raw reply	[relevance 7%]

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2019-05-12 22:25  7% [PATCH 0/3] slow clients and test/benchmark tools Eric Wong
2019-05-12 22:25  7% ` [PATCH 3/3] test/benchmark/uconnect: test for accept loop speed Eric Wong
2019-12-20  2:15  5% [ANN] unicorn 5.5.2 - Rack HTTP server for fast clients and *nix Eric Wong

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