[PerlChina] Re: time函数在cygwin下面有bug？

输出：

$ perl test_linode.pl
downloading http://london1.linode.com/100MB-london.bin 100MB-london.bin
1270110047      1270110047
Illegal division by zero at test_linode.pl line 30.

在 2010年4月1日 下午4:38，Achilles Xu <formalin14@gmail.com>写道：

测试代码：


use LWP::Simple qw(getstore $ua);

my @urls = (
            "http://london1.linode.com/100MB-london.bin",
            "http://newark1.linode.com/100MB-newark.bin",
            "http://atlanta1.linode.com/100MB-atlanta.bin",
            "http://dallas1.linode.com/100MB-dallas.bin",
            "http://fremont1.linode.com/100MB-fremont.bin"
);

my $timeout = 120;
$ua->default_header('Range' => 'bytes=0-1000000');
for my $url (@urls) {
  my ($file) = $url =~ m{/([^/]+)$};
  my $atime = time;
  eval {
    local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required                                                                                                        
    alarm $timeout;
    my $cmd = "wget $url";
    print "downloading $url $file\n";
    getstore($url, $file);
   
    alarm 0;
  };
  my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
                      $atime,$mtime,$ctime,$blksize,$blocks)
                          = stat($file);
  my $btime = time;
  print $btime, "\t", $atime, "\n";
  print $url, "\t" . ($size/1000/($btime - $atime)) . "\n";
  if ($@) {
    die unless $@ eq "alarm\n";   # propagate unexpected errors                                                                                                        
    # timed out                                                                                                                                                        
  }
  else {
    # didn't                                                                                                                                                           
  }
}

下载文件会需要几秒，但是几秒过去了，atime和btime是一样的，导致后面报出除0错误。

普通笔记本，联想的，intel t4400。

等会试试Time::HiRes有没有问题。

--
---------------------------
Achilles Xu

--
---------------------------
Achilles Xu

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