[英]Perl perl-5.8.8-38 Vs perl-5.10.1-136.el6.x86_64 Thread Memory leak
我是perl的新手。 但是我看到在线程实现中发生了这种内存泄漏。 版本比较perl-5.8.8-38 Vs perl-5.10.1-136.el6.x86_64
我执行的代码是
#!/usr/bin/perl -w
my $pid = "$$";
my $profileCommand = "/export/user_share/builder/cyborgtools/process_profiler/bin/process_profiler $pid";
print "$profileCommand\n";
system("$profileCommand 2>&1 >> /var/log/processProfiler_exec.log &");
#use threads('stack_size' => 5242880);
use threads;
use threads::shared;
my $curr_size = threads->get_stack_size();
my @threads;
my @cmds = ( "Anugraha", "Rinky", "Pratyush", "Shubham" );
for my $cmd (@cmds) {
my $thread = threads->new( \&execCmd, $cmd );
push( @threads, $thread );
my $size = $thread->get_stack_size();
print "Invoked stack for $cmd with stack size $size\n";
}
foreach (@threads) {
$_->join;
}
print "Thread main entering into sleep mode (10 secs) after thread join\n";
sleep(10);
exit;
sub execCmd {
my ($threadCmd) = @_;
print "In execCmd for thread $threadCmd\n";
print "Entering sleep mode (5secs) for thread with cmd $threadCmd\n";
sleep(5);
}
上面的代码Perl版本的输出执行:perl-5.8.8-38
[root@my-machine ~]# ./temp.pl
/tmp/process_profiler 7216
Invoked stack for Anugraha with stack size 10485760
In execCmd for thread Anugraha
Entering sleep mode (5secs) for thread with cmd Anugraha
Invoked stack for Rinky with stack size 10485760
In execCmd for thread Rinky
Entering sleep mode (5secs) for thread with cmd Rinky
Invoked stack for Pratyush with stack size 10485760
Invoked stack for Shubham with stack size 10485760
In execCmd for thread Pratyush
Entering sleep mode (5secs) for thread with cmd Pratyush
In execCmd for thread Shubham
Entering sleep mode (5secs) for thread with cmd Shubham
Thread main entering into sleep mode (10 secs) after thread join
[root@my-machine ~]#
以上代码Perl版本的输出执行:perl-5.10.1-136.el6.x86_64
[asinha@hydra-cyborgmother perl_thread_testing]$ ./temp.pl
/export/user_share/builder/cyborgtools/process_profiler/bin/process_profiler 9566
Invoked stack for Anugraha with stack size 10485760
In execCmd for thread Anugraha
Entering sleep mode (5secs) for thread with cmd Anugraha
Invoked stack for Rinky with stack size 10485760
In execCmd for thread Rinky
Entering sleep mode (5secs) for thread with cmd Rinky
Invoked stack for Pratyush with stack size 10485760
In execCmd for thread Pratyush
Entering sleep mode (5secs) for thread with cmd Pratyush
Invoked stack for Shubham with stack size 10485760
In execCmd for thread Shubham
Entering sleep mode (5secs) for thread with cmd Shubham
Thread main entering into sleep mode (10 secs) after thread join
[asinha@hydra-cyborgmother perl_thread_testing]$
我有一个本地的内存配置实用程序process_profiler,它基本上遍历proc文件系统任务目录中的PID,以查看线程并显示内存信息。
对于上面在PERL-5.8.8-38版中提到的代码,此分析器的输出
---------------------------------------------------------------------------------------------
Date PID VmPeak VmSize VmHWM VmRSS VmData VmStk CmdLine Parent
---------------------------------------------------------------------------------------------
2014-09-26 05:02:33 7216 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl *
2014-09-26 05:02:34 7216 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl *
2014-09-26 05:02:34 7220 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:34 7225 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:34 7227 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:34 7231 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:35 7216 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl *
2014-09-26 05:02:35 7220 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:35 7225 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:35 7227 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:35 7231 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:36 7216 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl *
2014-09-26 05:02:36 7220 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:36 7225 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:36 7227 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:36 7231 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:37 7216 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl *
2014-09-26 05:02:37 7220 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:37 7225 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:37 7227 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:37 7231 225088KB 192136KB 5040KB 5040KB 110780KB 88KB /usr/bin/perl
2014-09-26 05:02:38 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:39 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:40 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:41 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:42 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:43 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:44 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:45 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:46 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
2014-09-26 05:02:47 7216 225088KB 181220KB 5040KB 4948KB 99864KB 88KB /usr/bin/perl *
对于上面在PERL版本perl-5.10.1-136.el6.x86_64上提到的代码,此探查器的输出
---------------------------------------------------------------------------------------------
Date PID VmPeak VmSize VmHWM VmRSS VmData VmStk CmdLine Parent
---------------------------------------------------------------------------------------------
2014-09-26 10:01:28 9566 129820KB 282600KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl *
2014-09-26 10:01:29 9566 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl *
2014-09-26 10:01:29 9574 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:29 9577 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:29 9581 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:29 9583 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:30 9566 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl *
2014-09-26 10:01:30 9574 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:30 9577 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:30 9581 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:30 9583 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:31 9566 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl *
2014-09-26 10:01:31 9574 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:31 9577 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:31 9581 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:31 9583 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:33 9566 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl *
2014-09-26 10:01:33 9574 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:33 9577 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:33 9581 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:33 9583 500636KB 435100KB 5540KB 5540KB 306888KB 88KB /usr/bin/perl
2014-09-26 10:01:34 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:35 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:36 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:37 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:38 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:39 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:40 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:41 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:42 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
2014-09-26 10:01:43 9566 500636KB 424808KB 5540KB 5532KB 296596KB 88KB /usr/bin/perl *
我认为在perl-5.10.1-136.el6.x86_64上发生了内存问题。 我在这里想念什么吗?
编辑
在这两种情况下,最大堆栈大小的ulimit为10240KB。 两者都是具有8GB RAM和16GB交换空间的linux(x86_64)计算机。 perl版本perl-5.8.8-38的内核= 2.6.18-308.11.1.el5.x86_64 perl版本perl-5.10.1-136.el6.x86_64的内核= 2.6.32-431.el6.x86_64
使用Perl吸引人的原因之一是内存使用率。 Perl自己进行内存分配和垃圾回收,因此,如果从OS的角度观看它,则会得到一张失真的图片。 通常,您无需担心“整理”,但需要稍加小心以确保对范围进行适当调整。 全局变量是内存泄漏的经典来源,例如,因为您可以继续向数组添加元素。
但是,从根本上来说-如评论中所述-您的RSS不会随着时间的变化而改变。 无论如何,很难在几秒钟内发现内存泄漏。 因此,它看起来不像一个-但在更长的循环和周期中可能会更明显。
即使您在perl 5.8或5.10中发现了一个错误,也不太可能发现有人急于分析您的错误,因为他们分别在2008年和2009年停产。 (是的,我知道这是一篇较旧的文章,距EOL还剩5年了)。
最新的perl(在撰写本文时为5.20)可以在以下位置找到: http : //www.cpan.org/src/README.html
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