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parallel: slow down ssh to do more logins than MaxStartup. Passes unittest.
This commit is contained in:
Ole Tange
parent
0b5a90c11f
commit
cdb8944aad
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@ -1,3 +1,9 @@
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Aliases for bash -c:
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bash -c 'shopt -s expand_aliases; alias llll="ls -l"; alias bbb=ls;
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bbb; llll'
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Luk filen ved EOF - lad være med bare at læse videre.
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> /tmp/ged; tail -f /tmp/ged| xargs -n1 -E eof & sleep 1; echo echo a >>/tmp/ged; echo eof >>/tmp/ged; seq 4 >>/tmp/ged; wait
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87
src/parallel
87
src/parallel
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@ -90,19 +90,23 @@ if($::opt_header and not $::opt_pipe) {
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}
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# Parallel check for all hosts are up
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if($::opt_filter_hosts) {
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#if(not $::opt_plain and (@::opt_sshlogin or @::opt_sshloginfile)) {
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if($::opt_filter_hosts and (@::opt_sshlogin or @::opt_sshloginfile)) {
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my @S = map { "-S " . ::shell_quote_scalar($_) } @::opt_sshlogin;
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my @slf = map { "--slf " . ::shell_quote_scalar($_) } @::opt_sshloginfile;
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my $cmd = "$0 --tag --joblog - -k --nonall @S @slf " .
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"parallel --number-of-cores \\;".
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"parallel --number-of-cpus \\;".
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"parallel --max-line-length-allowed";
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my $cmd = "$0 --plain --tag --joblog - -k --onall @S @slf " .
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"::: ".
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"'parallel --number-of-cores ' ".
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"'parallel --number-of-cpus' ".
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"'parallel --max-line-length-allowed' ".
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"'true' ";
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::debug($cmd."\n");
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open(HOST, "$cmd |") || ::die_bug("parallel host check: $cmd");
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my (%ncores, %ncpus, %time_to_login, %maxlen);
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while(<HOST>) {
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my @col = split /\t/, $_;
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if(defined $col[6]) {
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# This is a line from --joblog
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if($col[6] eq "255") {
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# signal == 255: ssh failed
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# Remove sshlogin
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@ -115,18 +119,20 @@ if($::opt_filter_hosts) {
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$ncores{$col[1]} = 1;
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$ncpus{$col[1]} = 1;
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$maxlen{$col[1]} = Limits::Command::max_length();
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} elsif($col[0] eq "1" and $Global::host{$col[1]}) {
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} elsif($col[0] =~ /^\d+$/ and $Global::host{$col[1]}) {
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# 1 server 1338156112.05 0.303 0 0 0 0
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# parallel --number-of-cores ; parallel --number-of-cpus
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# Remember how log it took to log in
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$time_to_login{$col[1]} = $col[3];
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$time_to_login{$col[1]} = ::min($time_to_login{$col[1]},$col[3]);
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} elsif($col[0] eq "Seq" and $col[1] eq "Host" and
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$col[2] eq "Starttime" and $col[3] eq "Runtime") {
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# skip
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} else {
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::die_bug("host check unmatched long jobline : $_");
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::die_bug("host check unmatched long jobline: $_");
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}
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} elsif($Global::host{$col[0]}) {
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# This output from --number-of-cores, --number-of-cpus,
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# --max-line-length-allowed
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# ncores: server 8
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# ncpus: server 2
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# maxlen: server 131071
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@ -147,7 +153,7 @@ if($::opt_filter_hosts) {
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while (my ($sshlogin, $obj) = each %Global::host) {
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$ncpus{$sshlogin} or ::die_bug("ncpus missing: ".$obj->serverlogin());
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$ncores{$sshlogin} or ::die_bug("ncores missing: ".$obj->serverlogin());
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$time_to_login{$sshlogin} or ::die_bug("ncores missing: ".$obj->serverlogin());
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$time_to_login{$sshlogin} or ::die_bug("time_to_login missing: ".$obj->serverlogin());
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$maxlen{$sshlogin} or ::die_bug("maxlen missing: ".$obj->serverlogin());
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if($::opt_use_cpus_instead_of_cores) {
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$obj->set_ncpus($ncpus{$sshlogin});
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@ -155,8 +161,9 @@ if($::opt_filter_hosts) {
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$obj->set_ncpus($ncores{$sshlogin});
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}
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$obj->set_time_to_login($time_to_login{$sshlogin});
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$obj->set_time_to_login($time_to_login{$sshlogin});
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$obj->set_maxlength($maxlen{$sshlogin});
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::debug("Timing from -S:$sshlogin ncpus:$ncpus{$sshlogin} ncores:$ncores{$sshlogin} ",
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"time_to_login:$time_to_login{$sshlogin} maxlen:$maxlen{$sshlogin}");
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}
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}
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@ -181,6 +188,7 @@ if($::opt_nonall or $::opt_onall) {
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((defined $::opt_u) ? "-u" : ""),
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((defined $::opt_group) ? "-g" : ""),
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((defined $::opt_D) ? "-D" : ""),
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((defined $::opt_plain) ? "--plain" : ""),
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);
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my $suboptions =
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join(" ",
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@ -191,6 +199,7 @@ if($::opt_nonall or $::opt_onall) {
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((@::opt_v) ? "-vv" : ""),
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((defined $::opt_D) ? "-D" : ""),
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((defined $::opt_timeout) ? "--timeout ".$::opt_timeout : ""),
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((defined $::opt_plain) ? "--plain" : ""),
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);
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::debug("| $0 $options\n");
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open(PARALLEL,"| $0 -j0 $options") ||
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@ -387,7 +396,9 @@ sub write_record_to_pipe {
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while(not @Global::virgin_jobs) {
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::debug("No virgin jobs");
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$sleep = ::reap_usleep($sleep);
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start_more_jobs(); # These jobs may not be started because of loadavg
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# Jobs may not be started because of loadavg
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# or too little time between each ssh login.
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start_more_jobs();
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}
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my $job = shift @Global::virgin_jobs;
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if(fork()) {
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@ -1165,6 +1176,9 @@ sub start_more_jobs {
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# The server is swapping
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next;
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}
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if($sshlogin->too_fast_remote_login()) {
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next;
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}
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while ($sshlogin->jobs_running() < $sshlogin->max_jobs_running()) {
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if($Global::JobQueue->empty() and not $::opt_pipe) {
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last;
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@ -1179,6 +1193,7 @@ sub start_more_jobs {
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}
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debug("Job started on ".$sshlogin->string()."\n");
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$sshlogin->inc_jobs_running();
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$sshlogin->set_last_login_at(::hires_time());
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$jobs_started++;
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}
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debug("Running jobs after on ".$sshlogin->string().": ".$sshlogin->jobs_running()
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@ -1252,9 +1267,8 @@ sub drain_job_queue {
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my $sleep = 0.2;
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do {
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while($Global::total_running > 0) {
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debug("jobs running: ", $Global::total_running, "==", scalar
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keys %Global::running," slots: ", $Global::max_jobs_running,
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" Memory usage:".my_memory_usage()." ");
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debug($Global::total_running, "==", scalar
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keys %Global::running," slots: ", $Global::max_jobs_running);
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if($::opt_pipe) {
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# When using --pipe sometimes file handles are not closed properly
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for my $job (values %Global::running) {
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@ -1270,11 +1284,19 @@ sub drain_job_queue {
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}
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print $Global::original_stderr "\r",$progress{'status'};
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}
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if($Global::total_running < $Global::max_jobs_running
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and not $Global::JobQueue->empty()) {
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# These jobs may not be started because of loadavg
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# or too little time between each ssh login.
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start_more_jobs();
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}
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# Sometimes SIGCHLD is not registered, so force reaper
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$sleep = ::reap_usleep($sleep);
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}
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if(not $Global::JobQueue->empty()) {
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start_more_jobs(); # These jobs may not be started because of loadavg
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# These jobs may not be started because of loadavg
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# or too little time between each ssh login.
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start_more_jobs();
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$sleep = ::reap_usleep($sleep);
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}
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} while ($Global::total_running > 0
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@ -1538,8 +1560,8 @@ sub __REMOTE_SSH__ {}
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sub read_sshloginfiles {
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# Returns: N/A
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for (@_) {
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read_sshloginfile($_);
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for my $s (@_) {
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read_sshloginfile($s);
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}
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}
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@ -1687,7 +1709,7 @@ sub reaper {
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# Returns: N/A
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my $stiff;
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my $children_reaped = 0;
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debug("Reaper called ");
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debug("Reaper ");
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while (($stiff = waitpid(-1, &WNOHANG)) > 0) {
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$children_reaped++;
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if($Global::sshmaster{$stiff}) {
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@ -1754,7 +1776,7 @@ sub reaper {
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delete $Global::running{$stiff};
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start_more_jobs();
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}
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debug("Reaper exit\n");
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debug("done ");
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return $children_reaped;
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}
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@ -1987,7 +2009,7 @@ sub reap_usleep {
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sub usleep {
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# Sleep this many milliseconds.
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my $secs = shift;
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::debug("Sleeping ",$secs," millisecs\n");
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::debug(int($secs),"ms ");
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select(undef, undef, undef, $secs/1000);
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if($::opt_timeout) {
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::debug(my_dump($Global::timeoutq));
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@ -2144,6 +2166,7 @@ sub new {
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'control_path_dir' => undef,
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'control_path' => undef,
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'time_to_login' => undef,
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'last_login_at' => undef,
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'loadavg_file' => $ENV{'HOME'} . "/.parallel/tmp/loadavg-" .
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$$."-".$no_slash_string,
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'loadavg' => undef,
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@ -2277,6 +2300,30 @@ sub swap_activity {
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return $self->{'swap_activity'};
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}
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sub too_fast_remote_login {
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my $self = shift;
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if($self->{'last_login_at'} and $self->{'time_to_login'}) {
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# If now <= last_login + wait time: Then it is too soon.
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my $too_fast = (::hires_time() <= $self->{'last_login_at'}
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+ $self->{'time_to_login'});
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::debug("Too fast? $too_fast\n");
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return $too_fast;
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} else {
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# No logins so far (or time_to_login not computed): it is not too fast
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return 0;
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}
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}
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sub last_login_at {
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my $self = shift;
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return $self->{'last_login_at'};
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}
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sub set_last_login_at {
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my $self = shift;
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$self->{'last_login_at'} = shift;
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}
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sub loadavg_too_high {
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my $self = shift;
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my $loadavg = $self->loadavg();
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