[Rio-pm] Ajuda com Threads - tempo de abertura
Thiago Glauco Sanchez
thiagoglauco em ticursos.net
Domingo Julho 11 14:42:25 PDT 2010
Sim sim, entendi sua preocupação.
Mas em vez de:
for (1..3) {
my $ping = `/bin/ping -c 1 -w 1 $ip`;
não seria melhor já mandar pingar as 3 vezes no comando ou apenas 1?
Você está gerando 3 processos externos sem necessidade real.
outra... o comando ping já não é icmp?
my $p = Net::Ping->new('icmp')???
Em 11/07/2010 17:04, João André Simioni escreveu:
> Eu quero fazer o ping de 3 formas - UDP Echo / TCP Echo e ICMP Echo.
> Alguns clientes tem filtros e assim eu evito falsos positivos.
>
> Net::Ping mesmo com root tem resultados incoerentes quando uso ICMP e Threads.
>
> []'s
>
> On Sun, Jul 11, 2010 at 4:56 PM, Thiago Glauco Sanchez
> <thiagoglauco em ticursos.net> wrote:
>
>> 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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>>> Rio-pm em pm.org
>>> http://mail.pm.org/mailman/listinfo/rio-pm
>>>
>>>
>>>
>>
>> --
>> 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
>>
>> _______________________________________________
>> Rio-pm mailing list
>> Rio-pm em pm.org
>> http://mail.pm.org/mailman/listinfo/rio-pm
>>
>>
> _______________________________________________
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> http://mail.pm.org/mailman/listinfo/rio-pm
>
>
--
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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