+++ /dev/null
-# Copyright (C) 2018 all contributors <meta@public-inbox.org>
-# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-package PublicInbox::OverIdxFork;
-use strict;
-use warnings;
-use base qw(PublicInbox::OverIdx PublicInbox::Lock);
-use Storable qw(freeze thaw);
-use IO::Handle;
-
-sub create {
- my ($self, $v2writable) = @_;
- $self->SUPER::create();
- $self->spawn_worker($v2writable) if $v2writable->{parallel};
-}
-
-sub spawn_worker {
- my ($self, $v2writable) = @_;
- my ($r, $w);
- pipe($r, $w) or die "pipe failed: $!\n";
- my ($barrier_wait, $barrier_note);
- pipe($barrier_wait, $barrier_note) or die "pipe failed: $!\n";
- binmode $_, ':raw' foreach ($r, $w, $barrier_wait, $barrier_note);
- my $pid = fork;
- defined $pid or die "fork failed: $!\n";
- if ($pid == 0) {
- $v2writable->atfork_child;
- $v2writable = undef;
- close $w;
- close $barrier_wait;
-
- # F_SETPIPE_SZ = 1031 on Linux; increasing the pipe size here
- # speeds V2Writable batch imports across 8 cores by nearly 20%
- fcntl($r, 1031, 1048576) if $^O eq 'linux';
-
- eval { over_worker_loop($self, $r, $barrier_note) };
- die "over worker died: $@\n" if $@;
- exit;
- }
- $self->{w} = $w;
- $self->{pid} = $pid;
- $self->{lock_path} = "$self->{filename}.pipe.lock";
- close $r;
- close $barrier_note;
- $self->{barrier_wait} = $barrier_wait;
- $w->autoflush(1);
-}
-
-sub over_worker_loop {
- my ($self, $r, $barrier_note) = @_;
- $barrier_note->autoflush(1);
- $0 = 'pi-v2-overview';
- $self->begin_lazy;
- my $barrier = undef;
- while (my $line = $r->getline) {
- if ($line eq "commit\n") {
- $self->commit_lazy;
- } elsif ($line eq "close\n") {
- $self->disconnect;
- } elsif ($line =~ /\Abarrier_init (\d+)\n\z/) {
- my $n = $1 - 1;
- die "barrier in-progress\n" if defined $barrier;
- $barrier = { map { $_ => 1 } (0..$n) };
- } elsif ($line =~ /\Abarrier (\d+)\n\z/) {
- my $part = $1;
- die "no barrier in-progress\n" unless defined $barrier;
- delete $barrier->{$1} or die "unknown barrier: $part\n";
- if ((scalar keys %$barrier) == 0) {
- $barrier = undef;
- $self->commit_lazy;
- print $barrier_note "barrier_done\n" or die
- "print failed to barrier note: $!";
- }
- } elsif ($line =~ /\AD ([a-f0-9]{40,}) (.*)\n\z/s) {
- my ($oid, $mid) = ($1, $2);
- $self->remove_oid($oid, $mid);
- } else {
- my $len = int($line);
- my $n = read($r, my $msg, $len) or die "read: $!\n";
- $n == $len or die "short read: $n != $len\n";
- $msg = thaw($msg); # should raise on error
- defined $msg or die "failed to thaw buffer\n";
- eval { add_over($self, $msg) };
- warn "failed to index message <$msg->[-1]>: $@\n" if $@;
- }
- }
- die "$$ $0 dbh not released\n" if $self->{dbh};
- die "$$ $0 still in transaction\n" if $self->{txn};
-}
-
-# called by a partition worker
-# values: [ DS, NUM, BYTES, LINES, TS, MIDS, XPATH, doc_data ]
-sub add_over {
- my ($self, $values) = @_;
- if (my $w = $self->{w}) {
- my $err;
- my $str = freeze($values);
- $str = length($str) . "\n" . $str;
-
- # multiple processes write to the same pipe, so use flock
- # We can't avoid this lock for <=PIPE_BUF writes, either,
- # because those atomic writes can break up >PIPE_BUF ones
- $self->lock_acquire;
- print $w $str or $err = $!;
- $self->lock_release;
-
- die "print failed: $err\n" if $err;
- } else {
- $self->SUPER::add_over($values);
- }
-}
-
-sub remove_oid {
- my ($self, $oid, $mid) = @_;
- if (my $w = $self->{w}) {
- my $err;
- $self->lock_acquire;
- print $w "D $oid $mid\n" or $err = $!;
- $self->lock_release;
- die $err if $err;
- } else {
- $self->SUPER::remove_oid($oid, $mid); # OverIdx
- }
-}
-
-# write to the subprocess
-sub barrier_init {
- my ($self, $nparts) = @_;
- my $w = $self->{w} or return;
- my $err;
- $self->lock_acquire;
- print $w "barrier_init $nparts\n" or $err = $!;
- $self->lock_release;
- die $err if $err;
-}
-
-sub barrier_wait {
- my ($self) = @_;
- if (my $bw = $self->{barrier_wait}) {
- my $l = $bw->getline;
- $l eq "barrier_done\n" or die "bad response from barrier_wait: $l\n";
- } else {
- $self->commit_lazy;
- }
-}
-
-sub remote_commit {
- my ($self) = @_;
- if (my $w = $self->{w}) {
- my $err;
- $self->lock_acquire;
- print $w "commit\n" or $err = $!;
- $self->lock_release;
- die $err if $err;
- } else {
- $self->commit_lazy;
- }
-}
-
-# prevent connections when using forked subprocesses
-sub connect {
- my ($self) = @_;
- return if $self->{w};
- $self->SUPER::connect;
-}
-
-sub remote_close {
- my ($self) = @_;
- if (my $w = delete $self->{w}) {
- my $pid = delete $self->{pid} or die "no process to wait on\n";
- print $w "close\n" or die "failed to write to pid:$pid: $!\n";
- close $w or die "failed to close pipe for pid:$pid: $!\n";
- waitpid($pid, 0) == $pid or die "remote process did not finish";
- $? == 0 or die ref($self)." pid:$pid exited with: $?";
- } else {
- die "transaction in progress $self\n" if $self->{txn};
- $self->disconnect;
- }
-}
-
-1;