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Re: [Bug-tar] I: tar --listed regression

From: Dmitry V. Levin
Subject: Re: [Bug-tar] I: tar --listed regression
Date: Sun, 26 Feb 2006 00:44:09 +0300


On Thu, Dec 22, 2005 at 07:41:33PM +0300, Dmitry V. Levin wrote:
> The listed02.at test apparently trigger regression in tar --listed.
> If you run it 10000 times it may fail from few to few hundreds times
> depending on how slow your host is.
> I wrote a test based on listed02.at which demonstrates the problem:
> i686-ext3$ time sh -c 'for i in `seq 10000`; do ../tart.sh |md5sum; done' 
> |sort |uniq -c
> 111.02user 187.59system 4:07.39elapsed 120%CPU (0avgtext+0avgdata 
> 0maxresident)k
> 0inputs+0outputs (20360409major+6334625minor)pagefaults 0swaps
>      20 1318591bc0df60602e94e69623d8a98e  -
>      52 6911b28b3d8d257c3a6a676e14c96085  -
>       1 a639e6bf1ddaf3f2939fbaaaee3b87d4  -
>    9927 fe3f12d51f1297295d935ef1f6713740  -
> The problem is reproducable both with tar-1.13.25 and tar-1.15.1 with
> backports from CVS, on ext3 and tmpfs filesystems, using 2.4.x and 2.6.x
> linux kernels on ix86 and x86_64 arches.

Same happens with 1.15.90, but default output changed from
fe3f12d51f1297295d935ef1f6713740 to 1318591bc0df60602e94e69623d8a98e:
   9913 1318591bc0df60602e94e69623d8a98e  -
     87 6911b28b3d8d257c3a6a676e14c96085  -


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