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* [PATCH 14/14] solver: crank up max patches to 9999
  2019-01-27  4:03  6% [PATCH 00/14] convert solver to use pi-httpd.async Eric Wong
@ 2019-01-27  4:03  7% ` Eric Wong
  0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2019-01-27  4:03 UTC (permalink / raw)
  To: meta

Might as well, since the only constraint is filesystem space
for temporary files for public-inbox-httpd users.

-httpd can fairly share work across clients with our use of
psgi_qx; and there's a recent patch series in git@vger with 64
patches in sequence.
---
 lib/PublicInbox/SolverGit.pm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index dfc28d2..39acbe4 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -24,6 +24,14 @@ use URI::Escape qw(uri_escape_utf8);
 use POSIX qw(sysconf _SC_ARG_MAX);
 my $ARG_SIZE_MAX = (sysconf(_SC_ARG_MAX) || 4096) - 2048;
 
+# By default, "git format-patch" generates filenames with a four-digit
+# prefix, so that means 9999 patch series are OK, right? :>
+# Maybe we can make this configurable, main concern is disk space overhead
+# for uncompressed patch fragments.  Aside from space, public-inbox-httpd
+# is otherwise unaffected by having many patches, here, as it can share
+# work fairly.  Other PSGI servers may have trouble, though.
+my $MAX_PATCH = 9999;
+
 # di = diff info / a hashref with information about a diff ($di):
 # {
 #	oid_a => abbreviated pre-image oid,
@@ -425,7 +433,7 @@ sub di_url ($$) {
 sub resolve_patch ($$) {
 	my ($self, $want) = @_;
 
-	if (scalar(@{$self->{patches}}) > $self->{max_patch}) {
+	if (scalar(@{$self->{patches}}) > $MAX_PATCH) {
 		die "Aborting, too many steps to $self->{oid_want}";
 	}
 
@@ -477,7 +485,6 @@ sub new {
 	bless {
 		gits => $ibx->{-repo_objs},
 		user_cb => $user_cb,
-		max_patch => 100,
 
 		# TODO: config option for searching related inboxes
 		inboxes => [ $ibx ],
-- 
EW


^ permalink raw reply related	[relevance 7%]

* [PATCH 00/14] convert solver to use pi-httpd.async
@ 2019-01-27  4:03  6% Eric Wong
  2019-01-27  4:03  7% ` [PATCH 14/14] solver: crank up max patches to 9999 Eric Wong
  0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2019-01-27  4:03 UTC (permalink / raw)
  To: meta

Much of the groundwork for this was laid in the now-abandoned
"repobrowse" branch.  The goal was to improves fairness as we no
longer wait synchronously on git (apply|update-index|ls-files)
processes and can requests for other clients.

The end result was slightly (2-3%?) slower with all the
callbacks, but reducing "git apply" invocations by relying on
pathnames (instead of stdin) made the end result ~20% faster for
a large (64) patch series.

Email::Simple (via Email::MIME/PublicInbox::MIME) remains a
performance bottleneck, as it does a lot of unnecessary header
parsing and hash-table populating we don't care about; but I'm
not sure if I'll have time to address that.

Eric Wong (14):
  httpd/async: remove needless sysread wrapper
  qspawn: implement psgi_return and use it for githttpbackend
  qspawn|getlinebody: support streaming filters
  qspawn|httpd/async: improve and fix out-of-date comments
  httpd/async: stop running command if client disconnects
  qspawn: implement psgi_qx
  t/qspawn.t: psgi_qx stderr test
  view: swap CRLF for LF in HTML output
  solver: rewrite to use Qspawn->psgi_qx and pi-httpd.async
  solver: hold patches in temporary directory
  solver: reduce "git apply" invocations
  qspawn: decode $? for user-friendliness
  viewvcs: do not show final error message twice
  solver: crank up max patches to 9999

 lib/PublicInbox/GetlineBody.pm    |  16 +-
 lib/PublicInbox/Git.pm            |   2 +-
 lib/PublicInbox/GitHTTPBackend.pm |  64 +---
 lib/PublicInbox/HTTPD/Async.pm    |  27 +-
 lib/PublicInbox/Qspawn.pm         | 143 +++++++-
 lib/PublicInbox/SolverGit.pm      | 532 +++++++++++++++++-------------
 lib/PublicInbox/View.pm           |   4 +
 lib/PublicInbox/ViewVCS.pm        |  50 ++-
 t/qspawn.t                        |  12 +-
 t/solver_git.t                    |  22 +-
 10 files changed, 543 insertions(+), 329 deletions(-)

-- 
EW


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2019-01-27  4:03  6% [PATCH 00/14] convert solver to use pi-httpd.async Eric Wong
2019-01-27  4:03  7% ` [PATCH 14/14] solver: crank up max patches to 9999 Eric Wong

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