[Rio-pm] Ajuda com Threads - tempo de abertura
Thiago Glauco Sanchez
thiagoglauco em ticursos.net
Domingo Julho 11 12:56:33 PDT 2010
Endosso a solução do Lorn. Use o POE.
E cara... pra que isso??
sub checkIp {
my $ip = shift;
my $pingOk = 0;
eval {
for (1..3) {
my $ping = `/bin/ping -c 1 -w 1 $ip`;
if (grep { / 0% packet loss/ } $ping) {
$pingOk = 1;
return 1;
}
if ($pingOk == 0) {
my $p = Net::Ping->new('icmp');
$p->service_check(1);
if ($p->ping($ip, 1)) {
$pingOk = 1;
return 1;
}
}
if ($pingOk == 0) {
my $p = Net::Ping->new('udp');
$p->service_check(1);
if ($p->ping($ip, 1)) {
$pingOk = 1;
return 1;
}
}
sleep 3;
}
};
Para pingar com ping externo, depois com o Net::Ping via icmp e depois
com net::Ping udp? Ah... se não me engano, Net::Ping precisa de
permissão root para retornar um icmp de forma correta...
Em 09/07/2010 17:48, João André Simioni escreveu:
> Caros,
>
> tenho um script para testar cerca de 4700 equipamentos, usando ping.
> Queria usar cerca 250 threads para isso, então o que eu fiz foi
> quebrar o grupo de 4300 em grupos 18 elementos e abri uma thread para
> cada.
>
> Não há nenhum problema com o código, o que acontece é que o tempo de
> abertura das threads é muito alto. E quanto mais threads eu abro,
> maior o tempo para abertura das próximas. As primeiras abrem em 30ms,
> mas perto da thread 70 esse tempo já vai para quase 1 segundo.
>
> Vocês sabem como otimizar esse tempo de abertura? Ou alguma outra solução?
>
> Segue o output do script como exemplo:
> Para 4677 cpes, e 250 threads, tenho no final 246 grupos, com 19 elementos cada
> Trying to create thread in Fri Jul 9 17:46:50 2010.61858
> Created thread 1 (1) - took 0.030138 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.92080
> Created thread 2 (2) - took 0.042668 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.134968
> Created thread 3 (3) - took 0.064245 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.199430
> Created thread 4 (4) - took 0.082642 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.282278
> Created thread 5 (5) - took 0.128257 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.410769
> Created thread 6 (6) - took 0.136458 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.547383
> Created thread 7 (7) - took 0.208085 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.755594
> Created thread 8 (8) - took 0.173014 seconds to create
> Trying to create thread in Fri Jul 9 17:46:50 2010.928756
> Created thread 9 (9) - took 0.132713 seconds to create
> Trying to create thread in Fri Jul 9 17:46:51 2010.61608
> Created thread 10 (10) - took 0.127795 seconds to create
> Trying to create thread in Fri Jul 9 17:46:51 2010.189536
> Created thread 11 (11) - took 0.301836 seconds to create
>
> Obrigado
>
> João André Simioni
>
>
>
> #!/usr/bin/perl
>
> use strict;
> use DBI;
> use Net::Ping;
> use Time::HiRes qw/usleep tv_interval gettimeofday/;
> use threads ('yield', 'stack_size' => 32*4096, 'exit' =>
> 'threads_only', 'stringify');
>
> my $host = '192.168.160.179';
> my $sid = 'HOMOLOG';
> my $user = 'mac_user';
> my $pass = 'mac_user';
>
> my $dbh = DBI->connect("dbi:Oracle:host=$host;sid=$sid", $user, $pass,
> { AutoCommit => 1 });
>
> my $sth = $dbh->prepare('SELECT CPE_ID, CLIENTE_ID, CPE_DESC,
> CPE_IP_WAN, CPE_NODE, CPE_IF FROM MAC_CPE WHERE CPE_PING = ? AND
> CPE_ATIVO = ?');
> $sth->execute('1', 'A');
>
> my @cpes;
>
> while (my (@row) = $sth->fetchrow_array) {
> push @cpes, [ @row ];
> }
>
> $dbh->disconnect();
>
> my $maxThreads = 250;
> my $total = @cpes;
>
> my $cpePerThread = int($total / $maxThreads);
>
> my @toMonitor;
> my $i = 0;
> my $c = 0;
>
> foreach my $cpe (@cpes) {
> push @{$toMonitor[$i]}, $cpe;
> $c++;
>
> if ($c> $cpePerThread) {
> $i++;
> $c = 0;
> }
> }
>
> print "Para $total cpes, e $maxThreads threads, tenho no final $i
> grupos, com ", scalar @{$toMonitor[0]}, " elementos cada\n";
>
> sub processResult {
> my $r = shift;
> if (ref $r ne 'ARRAY') {
> print STDERR "Erro na thread\n";
> return 0;
> }
> my ($result, $host, $ifs) = @$r;
>
> }
>
> sub testeClient {
> my $threadNum = shift;
> my $cpeGroup = shift;
> foreach my $cpe (@{$cpeGroup}) {
> my ($cpeId, $clientId, $cpeDesc, $cpeIp, $cpeNode, $cpeIf) = @$cpe;
> my $pingOk =&checkIp($cpeIp);
> my $status = $pingOk ? 'RESPONDE' : 'MORTO';
> # print join(", ", $threadNum, $cpeId, $clientId, $cpeDesc,
> $cpeIp, $cpeNode, $cpeIf, $status), "\n";
> }
> # print "Finishing thread $threadNum\n";
> return([1, 0]);
> }
>
> my $threadCount = 1;
> foreach my $cpeGroup (@toMonitor) {
> print "Trying to create thread";
> my $t0 = [gettimeofday];
>
> print " in ", scalar localtime $t0->[0], ".", $t0->[1], "\n";
>
> my $thr = threads->create({scalar => '1'}, 'testeClient',
> $threadCount, $cpeGroup);
> my $elapsed = tv_interval ( $t0, [gettimeofday]);
> print "Created thread $thr ($threadCount) - took $elapsed seconds
> to create\n";
> $threadCount++;
>
> while (threads->list()>= $maxThreads) {
> my @joinable = threads->list(threads::joinable);
> for (@joinable) {
> my $r = $_->join();
> &processResult($r);
> }
> usleep(10000);
> }
> my $elapsed = tv_interval ( $t0, [gettimeofday]);
> }
>
> while (threads->list()) {
> my @joinable = threads->list(threads::joinable);
> for (@joinable) {
> my $r = $_->join();
> &processResult($r);
> }
> usleep(10000);
> }
>
> sub checkIp {
> my $ip = shift;
> my $pingOk = 0;
>
> eval {
> for (1..3) {
> my $ping = `/bin/ping -c 1 -w 1 $ip`;
>
> if (grep { / 0% packet loss/ } $ping) {
> $pingOk = 1;
> return 1;
> }
>
> if ($pingOk == 0) {
> my $p = Net::Ping->new('icmp');
> $p->service_check(1);
> if ($p->ping($ip, 1)) {
> $pingOk = 1;
> return 1;
> }
> }
>
> if ($pingOk == 0) {
> my $p = Net::Ping->new('udp');
> $p->service_check(1);
> if ($p->ping($ip, 1)) {
> $pingOk = 1;
> return 1;
> }
> }
>
> sleep 3;
> }
> };
>
> return $pingOk;
> }
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>
--
What is the sound of Perl? Is it not the sound of a wall that people have
stopped banging their heads against?
—Larry Wall
Thiago Glauco Sanchez
Intrutor Perl e Redes
www.ticursos.net
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