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Re: Running benchmarks/suite1 on Windows

From: Daniel Klíma <danklima_at_gmail.com>
Date: Tue, 21 Jun 2011 13:04:24 +0200

2011/6/21 Johan Corveleyn <jcorvel_at_gmail.com>:
> Hi,
>
> I managed to get the benchmark 'suite1' (tools/dev/benchmarks/suite1,
> which is used for the automated benchmarks [svnbench] on svn-qavm)
> running on Windows. I did that by translating the 'run' script (bash)
> to a Windows "batch" script (I'm not much of a "batch" programmer, but
> with some trial and error, and the help of google ;-) ...).
>
> I've put the run.bat in attachment here (just strip the .txt
> extension). I'll commit it tonight (don't have access right now), but
> some extra eyes in the meantime can't hurt :-).
>
> There is one annoying issue remaining with the run script for Windows
> (or the benchmark in general): I get an error when running the 100x1
> tests (100 directory levels deep). I reduced it to 50x1, but still get
> the error. It's probably some "max path component" or "max path
> length" limit on Windows/NTFS that's causing this. Maybe some of the
> Windows-devs knows how to work around this? Or should I reduce that
> test to 25x1?
>
...
>  File "C:\research\svn\client_build\trunk\tools\dev\benchmarks\suite1\benchmark.py",
> line 247, in create_tree
>    create_tree(dn, levels - 1, spread)
>  File "C:\research\svn\client_build\trunk\tools\dev\benchmarks\suite1\benchmark.py",
> line 240, in create_tree
>    f = open(fn, 'w')
> IOError: [Errno 2] No such file or directory:
> 'c:\\docume~1\\user\\locals~1\\temp\\tmpmddeli\\wc\\trunk\\dir_2\\dir_4\\d
> ir_6\\dir_8\\dir_10\\dir_12\\dir_14\\dir_16\\dir_18\\dir_20\\dir_22\\dir_24\\dir_26\\dir_28\\dir_30\\dir_32\\dir_34\\dir
> _36\\dir_38\\dir_40\\dir_42\\dir_44\\dir_46\\dir_48\\dir_50\\dir_52\\dir_54\\dir_56\\dir_58\\file_59'
> ]]]
>
> For the rest it runs fine. Below are some results (only the 5x5 and
> 1x100) from comparing trunk_at_1137727 with 1.6.17 (SlikSVN binary) on
> Windows XP (32-bit) with local disk, with Antivirus disabled.
>
> Note that it took a *huge* time to run, even without the 100x1 tests
> (~ 7 hours). I guess that shows how slow my machine really is ;-),
> especially with 1.6. The performance improvements are definitely great
> though (especially 'update', which is 80% faster with trunk! And also
> 'commit', with is down almost 60%).
...
>
> --
> Johan
>
Hello.

Max_Path is 256 chars excluding drive part. Max path for unicode
version of API is 32,767 when using path with "\\?\" style. I think
cmd should be able to work with \\?\ .

Ref: http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx
(Naming Files, Paths, and Namespaces section: Maximum Path Length
Limitation)

Daniel Klima
Received on 2011-06-21 13:04:58 CEST

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