Message-ID: <4D501FAE.2010802@serv.net>
Date: Mon, 07 Feb 2011 08:37:02 -0800
From: L Anderson <lowella AT serv DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: Please add 'AVG Internet Security 2011' to the BLODA list (and cygport also :-) ).
References: <4D4F77BE DOT 4000305 AT serv DOT net> <4D4FB852 DOT 7090906 AT freesbee DOT fr>
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Vincent Rivière wrote:
> L Anderson wrote:
>> This may be just a case of pilot error that I can't see because, surely,
>> others must have encountered this situation before.
>
> I can't say for sure, but recently I had big suspicions about AVG and
> directories.
>
> I have an MFC testsuite for some software unrelated to Cygwin. It
> creates a temporary directory, creates some files in it, then delete it
> recursively. This had always worked perfectly on all machines. But
> recently, some time after installing AVG, the deletion of the temp dir
> failed with a sharing violation. Strangely, trying to delete that
> directory 2 times in a row almost fixed the problem.
>

In all my testing, I have never encountered any thing like a share 
violation.  However, to reconfirm AVG greatly extends the time required 
to recursively traverse a directory tree, look at the following results 
of my test.  I create then delete a chain of 150 sub-directories 
recursively.  The times given are for 10 consecutive operations.  The 
first set is with AVG enabled, the second with it disabled.  As you can 
see, the enabled times are nonlinear, while the disabled ones are, for 
the most part, linear (153 seconds vs 22 seconds!).  I only show 150 
levels because any thing much larger is unbearable.


Regards,

LA


-----Test with AVG enabled-------
$ testCygport.sh  -d "O:\ScsiU2WAVGEnabled" -t both -m 150
$testFlag:
$createFlag:  create
$deleteFlag:  delete
$basePath:  /cygdrive/o/ScsiU2WAVGEnabled
$modVal:   10
$maxDepth: 150

(mkdir/cd) confdir3(0):0 sec.--decending
(mkdir/cd) confdir3(10):1 sec.--decending
(mkdir/cd) confdir3(20):1 sec.--decending
(mkdir/cd) confdir3(30):1 sec.--decending
(mkdir/cd) confdir3(40):2 sec.--decending
(mkdir/cd) confdir3(50):2 sec.--decending
(mkdir/cd) confdir3(60):2 sec.--decending
(mkdir/cd) confdir3(70):3 sec.--decending
(mkdir/cd) confdir3(80):3 sec.--decending
(mkdir/cd) confdir3(90):5 sec.--decending
(mkdir/cd) confdir3(100):6 sec.--decending
(mkdir/cd) confdir3(110):8 sec.--decending
(mkdir/cd) confdir3(120):9 sec.--decending
(mkdir/cd) confdir3(130):12 sec.--decending
(mkdir/cd) confdir3(140):14 sec.--decending
Made or traversed 150 sub-directories in 69 seconds.
***Starting the accent, removing sub-directories***
(cd/rmdir) confdir3(140):31 sec.--accending
(cd/rmdir) confdir3(130):14 sec.--accending
(cd/rmdir) confdir3(120):11 sec.--accending
(cd/rmdir) confdir3(110):9 sec.--accending
(cd/rmdir) confdir3(100):7 sec.--accending
(cd/rmdir) confdir3(90):6 sec.--accending
(cd/rmdir) confdir3(80):5 sec.--accending
(cd/rmdir) confdir3(70):4 sec.--accending
(cd/rmdir) confdir3(60):3 sec.--accending
(cd/rmdir) confdir3(50):2 sec.--accending
(cd/rmdir) confdir3(40):2 sec.--accending
(cd/rmdir) confdir3(30):1 sec.--accending
(cd/rmdir) confdir3(20):2 sec.--accending
(cd/rmdir) confdir3(10):1 sec.--accending
(cd/rmdir) confdir3(0):1 sec.--accending
Back at depth level 0; deleted 150 sub-directories.
Decent 69 seconds; accent 84 seconds; total 153 seconds.

-----Test with AVG disabled---------
$ testCygport.sh  -d "O:\ScsiU2WAVGDisabled" -t both -m 150
$testFlag:
$createFlag:  create
$deleteFlag:  delete
$basePath:  /cygdrive/o/ScsiU2WAVGDisabled
$modVal:   10
$maxDepth: 150

(mkdir/cd) confdir3(0):0 sec.--decending
(mkdir/cd) confdir3(10):1 sec.--decending
(mkdir/cd) confdir3(20):0 sec.--decending
(mkdir/cd) confdir3(30):1 sec.--decending
(mkdir/cd) confdir3(40):0 sec.--decending
(mkdir/cd) confdir3(50):1 sec.--decending
(mkdir/cd) confdir3(60):1 sec.--decending
(mkdir/cd) confdir3(70):1 sec.--decending
(mkdir/cd) confdir3(80):0 sec.--decending
(mkdir/cd) confdir3(90):1 sec.--decending
(mkdir/cd) confdir3(100):1 sec.--decending
(mkdir/cd) confdir3(110):1 sec.--decending
(mkdir/cd) confdir3(120):0 sec.--decending
(mkdir/cd) confdir3(130):1 sec.--decending
(mkdir/cd) confdir3(140):0 sec.--decending
Made or traversed 150 sub-directories in 9 seconds.
***Starting the accent, removing sub-directories***
(cd/rmdir) confdir3(140):2 sec.--accending
(cd/rmdir) confdir3(130):1 sec.--accending
(cd/rmdir) confdir3(120):1 sec.--accending
(cd/rmdir) confdir3(110):1 sec.--accending
(cd/rmdir) confdir3(100):0 sec.--accending
(cd/rmdir) confdir3(90):1 sec.--accending
(cd/rmdir) confdir3(80):1 sec.--accending
(cd/rmdir) confdir3(70):1 sec.--accending
(cd/rmdir) confdir3(60):1 sec.--accending
(cd/rmdir) confdir3(50):1 sec.--accending
(cd/rmdir) confdir3(40):1 sec.--accending
(cd/rmdir) confdir3(30):1 sec.--accending
(cd/rmdir) confdir3(20):1 sec.--accending
(cd/rmdir) confdir3(10):0 sec.--accending
(cd/rmdir) confdir3(0):1 sec.--accending
Back at depth level 0; deleted 150 sub-directories.
Decent 9 seconds; accent 13 seconds; total 22 seconds.


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