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Re: minor windows & cygwin regression failures on stable

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: minor windows & cygwin regression failures on stable
Date: 2005-03-27 21:30:00
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Lists: pgsql-hackers

Tom Lane wrote:

>Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>>Well, it seems at least to be running. When I fire up postmaster there 
>>are 4 processes running and no indication of failure that I could see on 
>>the log. (There is a complaint about failing to dup(0) after 3195 
>>successes - I assume that has nothing to do with it?)
>No, that's some code that's trying to measure the number of files we are
>allowed to open.  It expects to fail, it just thought the particular
>errno it got was odd enough to report.  Might be worth an #ifdef to tell
>it that that errno is expected on Cygwin?

Yes, looks like the error is EBADF.

>As far as the test failure, maybe we are just not allowing enough time
>for the stats collector to run?  The thing sits there for 2 sec, which
>theoretically is plenty, but it's a busy-wait loop and if the Cygwin
>scheduler is not aggressive about taking away timeslices then maybe
>the stats processes don't get to run.  Try doing the test script by
>hand, with just a manual delay instead of the sleep function, and see
>if it passes.

Yes, when I do that it works. But even when I increase the interval to 
30 secs the regression script fails. I tried to use a sleep function 
that didn't do a busy-wait loop, but plperl seems to segfault on this 
platform :-( What fun.

What has changed in the last 3 weeks is that I refreshed my Cygwin 
installation, I think when I was wrestling with the NLS thing.  If 
nothing in postgres has changed in this area I assume that platform  
changes account for the regression.



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