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From: Eric Wong <e@yhbt.net>
To: meta@public-inbox.org
Subject: [PATCH 26/82] git: idle rbuf for async
Date: Wed, 10 Jun 2020 07:04:23 +0000	[thread overview]
Message-ID: <20200610070519.18252-27-e@yhbt.net> (raw)
In-Reply-To: <20200610070519.18252-1-e@yhbt.net>

We do this for the C10K-oriented HTTP/NNTP/IMAP processes, and
we may support thousands of git-cat-file processes in the
future.
---
 lib/PublicInbox/Git.pm         | 47 ++++++++++++++++++----------------
 lib/PublicInbox/GitAsyncCat.pm |  2 +-
 2 files changed, 26 insertions(+), 23 deletions(-)

diff --git a/lib/PublicInbox/Git.pm b/lib/PublicInbox/Git.pm
index c5a3fa4642c..1c148086f46 100644
--- a/lib/PublicInbox/Git.pm
+++ b/lib/PublicInbox/Git.pm
@@ -123,7 +123,6 @@ sub _bidi_pipe {
 		fcntl($out_w, 1031, 4096);
 		fcntl($in_r, 1031, 4096) if $batch eq '--batch-check';
 	}
-	$self->{$batch} = \(my $rbuf = '');
 	$self->{$out} = $out_w;
 	$self->{$in} = $in_r;
 }
@@ -160,18 +159,20 @@ sub cat_async_step ($$) {
 	my ($self, $inflight) = @_;
 	die 'BUG: inflight empty or odd' if scalar(@$inflight) < 2;
 	my ($cb, $arg) = splice(@$inflight, 0, 2);
-	my $head = my_readline($self->{in}, $self->{'--batch'});
-	$head =~ / missing$/ and return
-		eval { $cb->(undef, undef, undef, undef, $arg) };
-
-	$head =~ /^([0-9a-f]{40}) (\S+) ([0-9]+)$/ or
+	my $rbuf = delete($self->{cat_rbuf}) // \(my $new = '');
+	my ($bref, $oid, $type, $size);
+	my $head = my_readline($self->{in}, $rbuf);
+	if ($head =~ /^([0-9a-f]{40}) (\S+) ([0-9]+)$/) {
+		($oid, $type, $size) = ($1, $2, $3 + 0);
+		$bref = my_read($self->{in}, $rbuf, $size + 1) or
+			fail($self, defined($bref) ? 'read EOF' : "read: $!");
+		chop($$bref) eq "\n" or fail($self, 'LF missing after blob');
+	} elsif ($head !~ / missing$/) {
 		fail($self, "Unexpected result from async git cat-file: $head");
-	my ($oid_hex, $type, $size) = ($1, $2, $3 + 0);
-	my $ret = my_read($self->{in}, $self->{'--batch'}, $size + 1);
-	fail($self, defined($ret) ? 'read EOF' : "read: $!") if !$ret;
-	chop($$ret) eq "\n" or fail($self, 'newline missing after blob');
-	eval { $cb->($ret, $oid_hex, $type, $size, $arg) };
-	warn "E: $oid_hex $@\n" if $@;
+	}
+	eval { $cb->($bref, $oid, $type, $size, $arg) };
+	$self->{cat_rbuf} = $rbuf if $$rbuf ne '';
+	warn "E: $oid: $@\n" if $@;
 }
 
 sub cat_async_wait ($) {
@@ -188,12 +189,13 @@ sub batch_prepare ($) {
 
 sub cat_file {
 	my ($self, $obj, $sizeref) = @_;
-	my ($retried, $head);
+	my ($retried, $head, $rbuf);
 	cat_async_wait($self);
 again:
 	batch_prepare($self);
+	$rbuf = delete($self->{cat_rbuf}) // \(my $new = '');
 	print { $self->{out} } $obj, "\n" or fail($self, "write error: $!");
-	$head = my_readline($self->{in}, $self->{'--batch'});
+	$head = my_readline($self->{in}, $rbuf);
 	if ($head =~ / missing$/) {
 		if (!$retried && alternates_changed($self)) {
 			$retried = 1;
@@ -207,7 +209,8 @@ again:
 
 	my $size = $1 + 0;
 	$$sizeref = $size if $sizeref;
-	my $ret = my_read($self->{in}, $self->{'--batch'}, $size + 1);
+	my $ret = my_read($self->{in}, $rbuf, $size + 1);
+	$self->{cat_rbuf} = $rbuf if $$rbuf ne '';
 	fail($self, defined($ret) ? 'read EOF' : "read: $!") if !$ret;
 	chop($$ret) eq "\n" or fail($self, 'newline missing after blob');
 	$ret;
@@ -217,7 +220,8 @@ sub check {
 	my ($self, $obj) = @_;
 	_bidi_pipe($self, qw(--batch-check in_c out_c pid_c err_c));
 	print { $self->{out_c} } $obj, "\n" or fail($self, "write error: $!");
-	chomp(my $line = my_readline($self->{in_c}, $self->{'--batch-check'}));
+	my $rbuf = ''; # TODO: async + {chk_rbuf}
+	chomp(my $line = my_readline($self->{in_c}, \$rbuf));
 	my ($hex, $type, $size) = split(' ', $line);
 
 	# Future versions of git.git may show 'ambiguous', but for now,
@@ -227,8 +231,7 @@ sub check {
 	return if $type eq 'missing' || $type eq 'ambiguous';
 
 	if ($hex eq 'dangling' || $hex eq 'notdir' || $hex eq 'loop') {
-		my $ret = my_read($self->{in_c}, $self->{'--batch-check'},
-				$type + 1);
+		my $ret = my_read($self->{in_c}, \$rbuf, $type + 1);
 		fail($self, defined($ret) ? 'read EOF' : "read: $!") if !$ret;
 		return;
 	}
@@ -237,9 +240,9 @@ sub check {
 }
 
 sub _destroy {
-	my ($self, $batch, $in, $out, $pid, $err) = @_;
+	my ($self, $rbuf, $in, $out, $pid, $err) = @_;
 	my $p = delete $self->{$pid} or return;
-	delete @$self{($batch, $in, $out)};
+	delete @$self{($rbuf, $in, $out)};
 	delete $self->{$err} if $err; # `err_c'
 
 	# PublicInbox::DS may not be loaded
@@ -278,8 +281,8 @@ sub qx {
 sub cleanup {
 	my ($self) = @_;
 	cat_async_wait($self);
-	_destroy($self, qw(--batch in out pid));
-	_destroy($self, qw(--batch-check in_c out_c pid_c err_c));
+	_destroy($self, qw(cat_rbuf in out pid));
+	_destroy($self, qw(chk_rbuf in_c out_c pid_c err_c));
 	!!($self->{pid} || $self->{pid_c});
 }
 
diff --git a/lib/PublicInbox/GitAsyncCat.pm b/lib/PublicInbox/GitAsyncCat.pm
index f168169f68d..65e16121969 100644
--- a/lib/PublicInbox/GitAsyncCat.pm
+++ b/lib/PublicInbox/GitAsyncCat.pm
@@ -30,7 +30,7 @@ sub event_step {
 	my $inflight = $git->{inflight};
 	if (@$inflight) {
 		$git->cat_async_step($inflight);
-		$self->requeue if @$inflight || length(${$git->{'--batch'}});
+		$self->requeue if @$inflight || exists $git->{cat_rbuf};
 	}
 }
 

  parent reply	other threads:[~2020-06-10  7:06 UTC|newest]

Thread overview: 84+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-10  7:03 [PATCH 00/82] public-inbox-imapd: read-only IMAP server Eric Wong
2020-06-10  7:03 ` [PATCH 01/82] doc: add some IMAP standards Eric Wong
2020-06-10  7:03 ` [PATCH 02/82] nntpd: restrict allowed newsgroup names Eric Wong
2020-06-10  7:04 ` [PATCH 03/82] preliminary imap server implementation Eric Wong
2020-06-10  7:04 ` [PATCH 04/82] inboxidle: new class to detect inbox changes Eric Wong
2020-06-10  7:04 ` [PATCH 05/82] imap: support IDLE Eric Wong
2020-06-10  7:04 ` [PATCH 06/82] msgmap: split ->max into its own method Eric Wong
2020-06-10  7:04 ` [PATCH 07/82] imap: delay InboxIdle start, support refresh Eric Wong
2020-06-10  7:04 ` [PATCH 08/82] imap: implement STATUS command Eric Wong
2020-06-10  7:04 ` [PATCH 09/82] imap: use Text::ParseWords::parse_line to handle quoted words Eric Wong
2020-06-10  7:04 ` [PATCH 10/82] imap: support LIST command Eric Wong
2020-06-10  7:04 ` [PATCH 11/82] t/imapd: support FakeInotify and KQNotify Eric Wong
2020-06-10  7:04 ` [PATCH 12/82] imap: support fetch for BODYSTRUCTURE and BODY Eric Wong
2020-06-10  7:04 ` [PATCH 13/82] eml: each_part: single part $idx is 1 Eric Wong
2020-06-10  7:04 ` [PATCH 14/82] imap: allow fetch of partial of BODY[...] and headers Eric Wong
2020-06-10  7:04 ` [PATCH 15/82] imap: always include `resp-text' in responses Eric Wong
2020-06-10  7:04 ` [PATCH 16/82] imap: split out unit tests and benchmarks Eric Wong
2020-06-10  7:04 ` [PATCH 17/82] imap: fix multi-message partial header fetches Eric Wong
2020-06-10  7:04 ` [PATCH 18/82] imap: simplify partial fetch structure Eric Wong
2020-06-10  7:04 ` [PATCH 19/82] imap: support sequence number FETCH Eric Wong
2020-06-10  7:04 ` [PATCH 20/82] imap: do not include ".PEEK" in responses Eric Wong
2020-06-10  7:04 ` [PATCH 21/82] imap: support the CLOSE command Eric Wong
2020-06-10  7:04 ` [PATCH 22/82] imap: speed up HEADER.FIELDS[.NOT] range fetches Eric Wong
2020-06-10  7:04 ` [PATCH 23/82] git: async: flatten the inflight array Eric Wong
2020-06-10  7:04 ` [PATCH 24/82] git: do our own read buffering for cat-file Eric Wong
2020-06-10  7:04 ` [PATCH 25/82] imap: use git-cat-file asynchronously Eric Wong
2020-06-10  7:04 ` Eric Wong [this message]
2020-06-10  7:04 ` [PATCH 27/82] imap: support LSUB command Eric Wong
2020-06-10  7:04 ` [PATCH 28/82] imap: FETCH: support comma-delimited ranges Eric Wong
2020-06-10  7:04 ` [PATCH 29/82] add imapd compression test Eric Wong
2020-06-10  7:04 ` [PATCH 30/82] testcommon: tcp_(server|connect): BAIL_OUT on failure Eric Wong
2020-06-10  7:04 ` [PATCH 31/82] *deflate: drop invalid comment about rbuf Eric Wong
2020-06-10  7:04 ` [PATCH 32/82] imap: fix pipelining with async git Eric Wong
2020-06-10  7:04 ` [PATCH 33/82] git: cat_async: provide requested OID + "missing" on missing blobs Eric Wong
2020-06-10  7:04 ` [PATCH 34/82] git: move async_cat reference to PublicInbox::Git Eric Wong
2020-06-10  7:04 ` [PATCH 35/82] git: async: automatic retry on alternates change Eric Wong
2020-06-10  7:04 ` [PATCH 36/82] imapclient: wrapper for Mail::IMAPClient Eric Wong
2020-06-10  7:04 ` [PATCH 37/82] xt: add imapd-validate and imapd-mbsync-oimap Eric Wong
2020-06-10  7:04 ` [PATCH 38/82] imap: support out-of-bounds ranges Eric Wong
2020-06-10  7:04 ` [PATCH 39/82] xt/perf-imap-list: time refresh_inboxlist Eric Wong
2020-06-10  7:04 ` [PATCH 40/82] imap: case-insensitive mailbox name comparisons Eric Wong
2020-06-10  7:04 ` [PATCH 41/82] imap: break giant inboxes into sub-inboxes of 50K messages Eric Wong
2020-06-10  7:04 ` [PATCH 42/82] imap: start doing iterative config reloading Eric Wong
2020-06-10  7:04 ` [PATCH 43/82] imap: require ".$UID_MIN-$UID_END" suffix Eric Wong
2020-06-10  7:04 ` [PATCH 44/82] imapd: ensure LIST is sorted alphabetically, for now Eric Wong
2020-06-10  7:04 ` [PATCH 45/82] imap: omit $UID_END from mailbox name, use index Eric Wong
2020-06-10  7:04 ` [PATCH 46/82] t/config.t: always compare against git bool behavior Eric Wong
2020-06-10  7:04 ` [PATCH 47/82] xt/*: show some tunable parameters Eric Wong
2020-06-10  7:04 ` [PATCH 48/82] imap: STATUS and LIST are case-insensitive, too Eric Wong
2020-06-10  7:04 ` [PATCH 49/82] imap: EXAMINE/STATUS: return correct counts Eric Wong
2020-06-10  7:04 ` [PATCH 50/82] imap: avoid uninitialized warnings on incomplete commands Eric Wong
2020-06-10  7:04 ` [PATCH 51/82] imap: start parsing out queries for SQLite and Xapian Eric Wong
2020-06-10  7:04 ` [PATCH 52/82] imap: SEARCH: clamp results to the 50K UID range Eric Wong
2020-06-10  7:04 ` [PATCH 53/82] imap: allow UID range search on timestamps Eric Wong
2020-06-10  7:04 ` [PATCH 54/82] over: get_art: use dbh->prepare_cached Eric Wong
2020-06-10  7:04 ` [PATCH 55/82] search: index byte size of a message for IMAP search Eric Wong
2020-06-10  7:04 ` [PATCH 56/82] search: index UID for IMAP search, too Eric Wong
2020-06-10  7:04 ` [PATCH 57/82] imap: remove dummies from sequence number FETCH Eric Wong
2020-06-10  7:04 ` [PATCH 58/82] imap: compile UID FETCH to opcodes Eric Wong
2020-06-10  7:04 ` [PATCH 59/82] imap: UID FETCH: optimize for smsg-only case Eric Wong
2020-06-10  7:04 ` [PATCH 60/82] imap: UID FETCH: optimize (UID FLAGS) harder Eric Wong
2020-06-10  7:04 ` [PATCH 61/82] imap: IDLE: avoid extraneous wakeups, keep-alive Eric Wong
2020-06-10  7:04 ` [PATCH 62/82] imap: 30 minute auto-logout timer Eric Wong
2020-06-10  7:05 ` [PATCH 63/82] imap: split ->logged_in attribute into a separate class Eric Wong
2020-06-10  7:05 ` [PATCH 64/82] searchidx: v1 (re)-index uses git asynchronously Eric Wong
2020-06-10  7:05 ` [PATCH 65/82] index: account for CRLF conversion when storing bytes Eric Wong
2020-06-10  7:05 ` [PATCH 66/82] imap: rely on smsg->{bytes} for RFC822.SIZE Eric Wong
2020-06-10  7:05 ` [PATCH 67/82] imap: UID FETCH requires at least one data item Eric Wong
2020-06-10  7:05 ` [PATCH 68/82] imap: LIST shows "INBOX" in all caps Eric Wong
2020-06-10  7:05 ` [PATCH 69/82] imap: support 8000 octet lines Eric Wong
2020-06-10  7:05 ` [PATCH 70/82] imap: reinstate some message sequence number support Eric Wong
2020-06-10  7:05 ` [PATCH 71/82] imap: cleanup ->{uid_base} usage Eric Wong
2020-06-10  7:05 ` [PATCH 72/82] imap: FETCH: more granular CRLF conversion Eric Wong
2020-06-10  7:05 ` [PATCH 73/82] imap: further speed up HEADER.FIELDS FETCH requests Eric Wong
2020-06-10  7:05 ` [PATCH 74/82] imap: FETCH: try to make fake MSNs sequentially Eric Wong
2020-06-10  7:05 ` [PATCH 75/82] imap: STATUS/EXAMINE: rely on SQLite overview Eric Wong
2020-06-10  7:05 ` [PATCH 76/82] imap: UID SEARCH: support multiple ranges Eric Wong
2020-06-10  7:05 ` [PATCH 77/82] imap: wire up Xapian, MSN SEARCH and multi sequence-sets Eric Wong
2020-06-10  7:05 ` [PATCH 78/82] imap: misc cleanups and notes Eric Wong
2020-06-10  7:05 ` [PATCH 79/82] imapd: don't bother sorting LIST output Eric Wong
2020-06-10  7:05 ` [PATCH 80/82] imap: remove non-UID SEARCH for now Eric Wong
2020-06-10  7:05 ` [PATCH 81/82] over: uid_range: remove LIMIT Eric Wong
2020-06-10  7:05 ` [PATCH 82/82] imap: FETCH: proper MSN => UID mapping for requests Eric Wong
2020-06-12 23:49 ` [PATCH 83/82] imap: introduce memory-efficient uo2m mapping Eric Wong

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