Use SysInfo.pm to find a suitable value for number of workers when

--parallel hasn't been specified
Add lib/My/SysInfo.pm

mysql-test/Makefile.am

@@ -42,6 +42,7 @@ nobase_test_DATA = lib/mtr_cases.pm \
 	lib/My/Platform.pm \
 	lib/My/SafeProcess.pm \
 	lib/My/File/Path.pm \
+	lib/My/SysInfo.pm \
 	lib/My/SafeProcess/Base.pm \
 	lib/My/SafeProcess/safe_process.pl
 

mysql-test/lib/My/SysInfo.pm

@@ -0,0 +1,181 @@
+# -*- cperl -*-
+# Copyright (C) 2004-2006 MySQL AB
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+package My::SysInfo;
+
+use strict;
+use Carp;
+use My::Platform;
+
+
+
+sub _cpuinfo {
+  my ($self)= @_;
+  print "_cpuinfo\n";
+
+  my $info_file= "/proc/cpuinfo";
+  if ( !(  -e $info_file and -f $info_file) ) {
+    return undef;
+  }
+
+  my $F= IO::File->new($info_file) or return undef;
+
+  # Set input separator to blank line
+  local $/ = '';
+
+  while ( my $cpu_chunk= <$F>) {
+    chomp($cpu_chunk);
+
+    my $cpuinfo = {};
+
+    foreach my $cpuline ( split(/\n/, $cpu_chunk) ) {
+      my ( $attribute, $value ) = split(/\s*:\s*/, $cpuline);
+
+      $attribute =~ s/\s+/_/;
+      $attribute = lc($attribute);
+
+      if ( $value =~ /^(no|not available|yes)$/ ) {
+	$value = $value eq 'yes' ? 1 : 0;
+      }
+
+      if ( $attribute eq 'flags' ) {
+	@{ $cpuinfo->{flags} } = split / /, $value;
+      } else {
+	$cpuinfo->{$attribute} = $value;
+      }
+    }
+
+    push(@{$self->{cpus}}, $cpuinfo);
+  }
+  $F= undef; # Close file
+  return $self;
+}
+
+
+sub _kstat {
+  my ($self)= @_;
+  while (1){
+    my $instance_num= $self->{cpus} ? @{$self->{cpus}} : 0;
+    my $list= `kstat -p -m cpu_info -i $instance_num`;
+    my @lines= split('\n', $list) or return undef;
+
+    my $cpuinfo= {};
+    foreach my $line (@lines)
+    {
+      my ($module, $instance, $name, $statistic, $value)=
+	$line=~ /(\w*):(\w*):(\w*):(\w*)\t(.*)/;
+
+      $cpuinfo->{$statistic}= $value;
+    }
+
+    # Default value, the actual cpu values can be used to decrease it
+    # on slower cpus
+    $cpuinfo->{bogomips}= 2000;
+
+    push(@{$self->{cpus}}, $cpuinfo);
+  }
+
+  return $self;
+}
+
+
+sub _unamex {
+  my ($self)= @_;
+  # TODO
+  return undef;
+}
+
+
+sub new {
+  my ($class)= @_;
+
+
+  my $self= bless {
+		   cpus => (),
+		  }, $class;
+
+  my @info_methods =
+    (
+     \&_cpuinfo,
+     \&_kstat,
+     \&_unamex,
+   );
+
+  foreach my $method (@info_methods){
+    if ($method->($self)){
+      return $self;
+    }
+  }
+
+  # Push a dummy cpu
+  push(@{$self->{cpus}}, {bogomips => 2000, model_name => "unknown"});
+
+  return $self;
+}
+
+
+# Return the list of cpus found
+sub cpus {
+  my ($self)= @_;
+  return @{$self->{cpus}} or
+    confess "INTERNAL ERROR: No cpus in list";
+}
+
+
+# Return the number of cpus found
+sub num_cpus {
+  my ($self)= @_;
+  return int(@{$self->{cpus}}) or
+    confess "INTERNAL ERROR: No cpus in list";
+}
+
+
+# Return the smallest bogomips value amongst the processors
+sub min_bogomips {
+  my ($self)= @_;
+
+  my $bogomips;
+
+  foreach my $cpu (@{$self->{cpus}}) {
+    if (!defined $bogomips or $bogomips > $cpu->{bogomips}) {
+      $bogomips= $cpu->{bogomips};
+    }
+  }
+
+  return $bogomips;
+}
+
+
+# Prit the cpuinfo
+sub print_info {
+  my ($self)= @_;
+
+  foreach my $cpu (@{$self->{cpus}}) {
+    while ((my ($key, $value)) = each(%$cpu)) {
+      print " ", $key, "= ";
+      if (ref $value eq "ARRAY") {
+	print "[", join(", ", @$value), "]";
+      } else {
+	print $value;
+      }
+      print "\n";
+    }
+    print "\n";
+  }
+}
+
+1;

mysql-test/mysql-test-run.pl

@@ -49,6 +49,7 @@ use My::SafeProcess;
 use My::ConfigFactory;
 use My::Options;
 use My::Find;
+use My::SysInfo;
 use mtr_cases;
 use mtr_report;
 use mtr_match;
@@ -206,7 +207,9 @@ $| = 1; # Automatically flush STDOUT
 
 main();
 
+
 sub main {
+  report_option('verbose', 0);
 
   # This is needed for test log evaluation in "gen-build-status-page"
   # in all cases where the calling tool does not log the commands
@@ -216,8 +219,17 @@ sub main {
   Getopt::Long::Configure("pass_through");
   GetOptions('parallel=i' => \$opt_parallel) or usage("Can't read options");
 
-  if ( not defined $opt_parallel ){
+  if ( not defined $opt_parallel ) {
-    $opt_parallel= 4; # Default
+    # Try to find a suitable value for number of workers
+    my $sys_info= My::SysInfo->new();
+    $sys_info->print_info();
+
+    $opt_parallel= $sys_info->num_cpus();
+    for my $limit (2000, 1500, 1000, 500){
+      $opt_parallel-- if ($sys_info->min_bogomips() < $limit);
+    }
+    $opt_parallel= 1 if ($opt_parallel < 1);
+    mtr_report("Using parallel: $opt_parallel");
   }
 
   # Create server socket on any free port
@@ -241,7 +253,6 @@ sub main {
       exit(1);
     }
 
-    mtr_report("Started worker, pid: $child_pid");
     $children{$child_pid}= 1;
   }