Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtps
 (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <pgsql-committers-owner+archive@lists.postgresql.org>)
	id 1lTakr-00063O-4L
	for pgsql-committers@arkaria.postgresql.org; Tue, 06 Apr 2021 01:43:45 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.92)
	(envelope-from <pgsql-committers-owner+archive@lists.postgresql.org>)
	id 1lTakp-0003En-PJ
	for pgsql-committers@arkaria.postgresql.org; Tue, 06 Apr 2021 01:43:43 +0000
Received: from makus.postgresql.org ([2001:4800:3e1:1::229])
	by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1lTakp-0003Eg-KI
	for pgsql-committers@lists.postgresql.org; Tue, 06 Apr 2021 01:43:43 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1lTakm-0001mV-PN
	for pgsql-committers@lists.postgresql.org; Tue, 06 Apr 2021 01:43:42 +0000
Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1])
	by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 1361hcUb939271;
	Mon, 5 Apr 2021 21:43:39 -0400
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Michael Paquier <michael@paquier.xyz>
cc: pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Refactor all TAP test suites doing connection checks
In-reply-to: <936576.1617669613@sss.pgh.pa.us>
References: <E1lTDox-0006rF-OV@gemulon.postgresql.org>
 <513200.1617634642@sss.pgh.pa.us> <YGuSe6Q484Eshj2n@paquier.xyz>
 <932059.1617663467@sss.pgh.pa.us> <933130.1617665023@sss.pgh.pa.us>
 <YGunFpb3U9zi5DV4@paquier.xyz> <935457.1617668131@sss.pgh.pa.us>
 <YGuq7obSb5BviTHz@paquier.xyz> <936576.1617669613@sss.pgh.pa.us>
Comments: In-reply-to Tom Lane <tgl@sss.pgh.pa.us>
	message dated "Mon, 05 Apr 2021 20:40:13 -0400"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <939269.1617673418.1@sss.pgh.pa.us>
Date: Mon, 05 Apr 2021 21:43:38 -0400
Message-ID: <939270.1617673418@sss.pgh.pa.us>
List-Id: <pgsql-committers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-committers@lists.postgresql.org>
List-Owner: <mailto:pgsql-committers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-committers>
Archived-At: 
 <https://www.postgresql.org/message-id/939270.1617673418%40sss.pgh.pa.us>
Precedence: bulk

I wrote:
> Well, since it's a race condition it's obviously going to be sensitive to
> machine speed.  I think that Perl version, or more likely version of
> IPC::Run or a related module, may enter into it too.  prairiedog has
> gotten through the tests several times since yesterday without failing,
> yet it's significantly slower than the other PPC Mac I was able to
> consistently reproduce the problem on.  I don't think those two have
> the same vintage of Perl installation, though, so Perl version seems
> like a likely explanation.

Just for the archives' sake:

prairiedog (passed 3 out of 3 tries):
450MHz PPC32
Perl 5.8.3
$ perl -MIPC::Run -e 'print $IPC::Run::VERSION ."\n";' 
0.79
(file dates on the IPC::Run files are 2004)

gaur (failed 1 out of 1 tries):
360MHz HPPA
Perl 5.8.9
IPC::Run 0.94 (file dates 2014)

my other PPC Mac (failed consistently, 10 out of 10):
1.33GHz PPC32
Perl 5.8.8
IPC::Run 20180523.0

Not sure what to make of that, though a regression in IPC::Run
seems possible.  It's also possible that buildfarm script (the
first two) versus manual invocation (the last) is related somehow.

			regards, tom lane