[Rio-pm] Ajuda com Threads - tempo de abertura
Thiago Glauco Sanchez
thiagoglauco em ticursos.net
Domingo Julho 11 19:40:52 PDT 2010
O que eu quero dizer: você testou com o ping externo que é um teste
icmp... depois fez outro teste icmp com o Net::Ping...
Não seria mais interessante testar de outra forma?
$p = Net::Ping->new("tcp", 2);
$p->port_number(getservbyname("http", "tcp"));
Mais umas coisas: Suas máquinas/equipamentos em teste estão via internet ou rede local?
Já pensou em usar SNMP? Já tive um problema parecido e iria utilizar um processo para cada equipamento por desempenho e acabai optando por utilizar o Net:SNMP
que permite utilizar uma função de callback em vez de utilizar um processo para cada equipamento. Eu mando uma requisição para todos os equipamentos e conforme eles respondem
a função de call-back trata a requisição.
Porém, não conheço o seu ambiente. Apenas acho que criar 4000 threads não seja a melhor solução.
Em 11/07/2010 23:18, João André Simioni escreveu:
> É typo - já está certo no código. ICMP vai via comando externo, UDP e
> TCP via Net::Ping.
>
> Com relação aos testes, é normal um momento de sobrecarga causar a não
> resposta de testes - essas sobrecargas não devem duram mais que 5
> segundos. Por isso o sleep - assim eu faço o mesmo teste 3x, com
> intervalos de 3 segundos.
>
> []'s
>
> On Sun, Jul 11, 2010 at 10:31 PM, Blabos de Blebe<blabos em gmail.com> wrote:
>
>> Não seria um typo?
>>
>> icmp -> ping;
>> tcp e udp -> Net::Ping
>>
>>
>>
>> On Sun, Jul 11, 2010 at 6:42 PM, Thiago Glauco Sanchez
>> <thiagoglauco em ticursos.net> wrote:
>>
>>> 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;
>>>>>> }
>>>>>> _______________________________________________
>>>>>> Rio-pm mailing list
>>>>>> 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
>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> Rio-pm mailing list
>>>> 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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>>
>>
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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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