2 # Copyright (C) 2019-2020 all contributors <meta@public-inbox.org>
3 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
5 # Parallel test runner which preloads code and reuses worker processes
6 # to give a nice speedup over prove(1). It also generates per-test
7 # .log files (similar to automake tests).
9 # *.t files run by this should not rely on global state.
11 # Usage: $PERL -I lib -w t/run.perl -j4
12 # Or via prove(1): prove -lvw t/run.perl :: -j4
14 use PublicInbox::TestCommon;
16 use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
19 use POSIX qw(_POSIX_PIPE_BUF WNOHANG);
23 our $log_suffix = '.log';
24 my ($shuffle, %pids, @err);
25 GetOptions('j|jobs=i' => \$jobs,
26 'repeat=i' => \$repeat,
27 'log=s' => \$log_suffix,
28 's|shuffle' => \$shuffle,
29 ) or die "Usage: $0 [-j JOBS] [--log=SUFFIX] [--repeat RUNS]";
30 if (($ENV{TEST_RUN_MODE} // 2) == 0) {
31 die "$0 is not compatible with TEST_RUN_MODE=0\n";
33 my @tests = scalar(@ARGV) ? @ARGV : glob('t/*.t');
35 open OLDOUT, '>&STDOUT' or die "dup STDOUT: $!";
36 open OLDERR, '>&STDERR' or die "dup STDERR: $!";
40 key2sub($_) for @tests; # precache
44 } elsif (open(my $prove_state, '<', '.prove') && eval { require YAML::XS }) {
45 # reuse "prove --state=save" data to start slowest tests, first
46 my $state = YAML::XS::Load(do { local $/; <$prove_state> });
47 my $t = $state->{tests};
49 ($t->{$b}->{elapsed} // 0) <=> ($t->{$a}->{elapsed} // 0)
53 our $tb = Test::More->builder;
60 our ($worker, $worker_test);
63 $? = 255 if $? == 0 && !$tb->is_passing;
64 my $status = $? ? 'not ok' : 'ok';
65 chdir($cwd) or DIE "chdir($cwd): $!";
66 if ($log_suffix ne '') {
67 my $log = $worker_test;
68 $log =~ s/\.t\z/$log_suffix/;
70 if (open my $fh, '<', $log) {
71 my @not_ok = grep(!/^(?:ok |[ \t]*#)/ms, <$fh>);
72 pop @not_ok if $not_ok[-1] =~ /^[0-9]+\.\.[0-9]+$/;
74 print OLDERR map { $pfx.$_ } @not_ok;
75 seek($fh, 0, SEEK_SET) or die "seek: $!";
77 # show unique skip texts and the number of times
78 # each text was skipped
80 my @sk = (<$fh> =~ m/^ok [0-9]+ (# skip [^\n]+)/mgs);
83 my @err = grep { !$nr{$_}++ } @sk;
84 print OLDERR "$pfx$_ ($nr{$_})\n" for @err;
85 $skip = ' # total skipped: '.scalar(@sk);
88 print OLDERR "could not open: $log: $!\n";
90 print OLDOUT "$status $worker_test$skip\n";
94 # Test::Builder or Test2::Hub may call exit() from plan(skip_all => ...)
95 END { test_status() if (defined($worker_test) && $worker == $$) }
100 if ($log_suffix ne '') {
102 $log =~ s/\.[^\.]+\z/$log_suffix/ or DIE "can't log for $test";
103 open $log_fh, '>', $log or DIE "open $log: $!";
104 $log_fh->autoflush(1);
105 $tb->output($log_fh);
106 $tb->failure_output($log_fh);
107 $tb->todo_output($log_fh);
108 open STDOUT, '>&', $log_fh or DIE "1>$log: $!";
109 open STDERR, '>&', $log_fh or DIE "2>$log: $!";
111 $worker_test = $test;
114 $worker_test = undef;
115 push @err, "$test ($?)" if $?;
118 sub UINT_SIZE () { 4 }
120 # worker processes will SIGUSR1 the producer process when it
121 # sees EOF on the pipe. On FreeBSD 11.2 and Perl 5.30.0,
122 # sys/ioctl.ph gives the wrong value for FIONREAD().
124 my $eof; # we stop respawning if true
126 my $start_worker = sub {
127 my ($i, $j, $rd, $todo) = @_;
128 defined(my $pid = fork) or DIE "fork: $!";
132 my $r = sysread($rd, my $buf, UINT_SIZE);
138 DIE "short read $r" if $r != UINT_SIZE;
139 my $t = unpack('I', $buf);
140 run_test($todo->[$t]);
143 kill 'USR1', $producer if !$eof; # sets $eof in $producer
144 DIE join('', map { "E: $_\n" } @err) if @err;
151 # negative $repeat means loop forever:
152 for (my $i = $repeat; $i != 0; $i--) {
153 my @todo = $shuffle ? List::Util::shuffle(@tests) : @tests;
155 # single-producer, multi-consumer queue relying on POSIX semantics
156 pipe(my ($rd, $wr)) or DIE "pipe: $!";
158 # fill the queue before forking so children can start earlier
159 my $n = (_POSIX_PIPE_BUF / UINT_SIZE);
161 print $wr join('', map { pack('I', $_) } (0..$#todo)) or DIE;
164 } else { # write what we can...
166 print $wr join('', map { pack('I', $_) } (0..$n)) or DIE;
167 $n += 1; # and send more ($n..$#todo), later
170 local $SIG{USR1} = sub { $eof = 1 };
173 my $flags = $sig ? WNOHANG : 0;
175 my $pid = waitpid(-1, $flags) or return;
177 my $j = delete $pids{$pid};
179 push @err, "reaped unknown $pid ($?)";
182 push @err, "job[$j] ($?)" if $?;
183 # skip_all can exit(0), respawn if needed:
185 print OLDERR "# respawning job[$j]\n";
186 $start_worker->($i, $j, $rd, \@todo);
191 # start the workers to consume the queue
192 for (my $j = 0; $j < $jobs; $j++) {
193 $start_worker->($i, $j, $rd, \@todo);
197 local $SIG{CHLD} = $sigchld;
198 # too many tests to fit in the pipe before starting workers,
199 # send the rest now the workers are running
200 print $wr join('', map { pack('I', $_) } ($n..$#todo)) or DIE;
204 $sigchld->(0) while scalar(keys(%pids));
205 DIE join('', map { "E: $_\n" } @err) if @err;
208 print OLDOUT "1..".($repeat * scalar(@tests))."\n" if $repeat >= 0;