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authorEric Wong <e@80x24.org>2022-08-05 08:29:54 +0000
committerEric Wong <e@80x24.org>2022-08-06 06:34:45 +0000
commitd1024533712e32fde9c9812e604661ffc9e79019 (patch)
tree596befe523eeb3d85eb15af9b8d6074d476f20d7
parent27876bd1269d18f697847a724a8465318cb3cd67 (diff)
downloadpublic-inbox-d1024533712e32fde9c9812e604661ffc9e79019.tar.gz
This means all Inbox, Git, Over, Msgmap, Search objects also get
deduplicated if they belong to the same config file, reducing
memory and FD usage.  This helps save memory and improve cache
hit rates in -netd setups where NNTP, IMAP, HTTP, and POP3
servers run in the same process.

InboxIdle was the only bit which needed adjustment, but there
may be other bugs lurking despite all tests passing.
-rw-r--r--lib/PublicInbox/Config.pm9
-rw-r--r--lib/PublicInbox/Daemon.pm3
-rw-r--r--lib/PublicInbox/InboxIdle.pm4
3 files changed, 13 insertions, 3 deletions
diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index a31b5b74..ad8b8e9d 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -13,6 +13,7 @@ use v5.10.1;
 use PublicInbox::Inbox;
 use PublicInbox::Spawn qw(popen_rd);
 our $LD_PRELOAD = $ENV{LD_PRELOAD}; # only valid at startup
+our $DEDUPE; # set to {} to dedupe or clear cache
 
 sub _array ($) { ref($_[0]) eq 'ARRAY' ? $_[0] : [ $_[0] ] }
 
@@ -22,11 +23,17 @@ sub new {
         my ($class, $file, $errfh) = @_;
         $file //= default_file();
         my $self;
+        my $set_dedupe;
         if (ref($file) eq 'SCALAR') { # used by some tests
                 open my $fh, '<', $file or die;  # PerlIO::scalar
                 $self = config_fh_parse($fh, "\n", '=');
                 bless $self, $class;
         } else {
+                if (-f $file && $DEDUPE) {
+                        $file = rel2abs_collapsed($file);
+                        $self = $DEDUPE->{$file} and return $self;
+                        $set_dedupe = 1;
+                }
                 $self = git_config_dump($class, $file, $errfh);
                 $self->{'-f'} = $file;
         }
@@ -62,7 +69,7 @@ sub new {
         if (my $css = delete $self->{'publicinbox.css'}) {
                 $self->{css} = _array($css);
         }
-
+        $DEDUPE->{$file} = $self if $set_dedupe;
         $self;
 }
 
diff --git a/lib/PublicInbox/Daemon.pm b/lib/PublicInbox/Daemon.pm
index 86234771..b6f4f9ed 100644
--- a/lib/PublicInbox/Daemon.pm
+++ b/lib/PublicInbox/Daemon.pm
@@ -22,6 +22,7 @@ use PublicInbox::Sigfd;
 use PublicInbox::Git;
 use PublicInbox::GitAsyncCat;
 use PublicInbox::Eml;
+use PublicInbox::Config;
 our $SO_ACCEPTFILTER = 0x1000;
 my @CMD;
 my ($set_user, $oldset);
@@ -653,8 +654,10 @@ sub defer_accept ($$) {
 
 sub daemon_loop ($) {
         my ($xnetd) = @_;
+        local $PublicInbox::Config::DEDUPE = {}; # enable dedupe cache
         my $refresh = sub {
                 my ($sig) = @_;
+                %$PublicInbox::Config::DEDUPE = (); # clear cache
                 for my $xn (values %$xnetd) {
                         delete $xn->{tlsd}->{ssl_ctx}; # PublicInbox::TLS::start
                         eval { $xn->{refresh}->($sig) };
diff --git a/lib/PublicInbox/InboxIdle.pm b/lib/PublicInbox/InboxIdle.pm
index 2781b3e1..ffbbfea7 100644
--- a/lib/PublicInbox/InboxIdle.pm
+++ b/lib/PublicInbox/InboxIdle.pm
@@ -30,9 +30,9 @@ sub in2_arm ($$) { # PublicInbox::Config::each_inbox callback
         my $old_ibx = $cur->[0];
         $cur->[0] = $ibx;
         if ($old_ibx) {
-                $ibx->{unlock_subs} and
-                        die "BUG: $dir->{unlock_subs} should not exist";
+                my $u = $ibx->{unlock_subs};
                 $ibx->{unlock_subs} = $old_ibx->{unlock_subs};
+                %{$ibx->{unlock_subs}} = (%$u, %{$ibx->{unlock_subs}}) if $u;
 
                 # Linux::Inotify2::Watch::name matches if watches are the
                 # same, no point in replacing a watch of the same name