Re: problems building feature release on windows

[Todd Denniston]

Mark D. Baushke wrote:
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> Kelly F. Hickel <kfh@mqsoftware.com> writes:
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>
> > > -----Original Message-----
> > > On Behalf Of Mark D. Baushke
<snip>
> > One very odd thing that I have no explanation
> > for is that I moved from a 4 way 700mhz PIII to
> > a 2 way 2.4 mhz PIV and it takes roughly the
> > same amount of time. The only inkling of an
> > explanation is that I was running cvspserver
> > 1.11.x on the PIII and am running 1.12.13 on the
> > PIV. The cvs process is definitely CPU bound
> > during this operation (according to top and
> > xosview).
>
>
> It will be reading the existing files and copying
> them in to temporary ,filename, files and adding
> the new tag along the way. I would have thought
> that operation would be more IO bound than CPU
> bound, but I have not looked at it closely in a
> long time.

With the trouble you are having getting it compiled on windows, it would 
probably be better to do some empirical testing first to be sure of what you 
are looking for.

Like Mark I would expect the bottle neck to be the file IO more so than the 
CPU.  I suspect that if the server machine is only serving CVS, that if you 
brought the PIII up in uniprocessor mode it would still almost[1] keep up with 
the PIV because cvs server is a single threaded process.


A useful test to see if it is file IO vs CPU bound would be to put your 
repository, temp dir and LockDir in a RAM disk (loop device) to remove the 
hard drive rewriting. If it was CPU bound you would get the same timing I THINK.

You might also try with and without the -z option to cvs, I don't know the 
protocol well enough to be sure, but a tag operation I think sends each file 
name individually to the server, it would be unlikely but perhaps you have 
enough message traffic during a tag to swamp your net (really unlikely). 
(might never mind this, I reread part of your email and local access and 
pserver are taking the same amount of time.)


[1] I believe, If it could be brought up in dual processor it would probably 
be the same timing you see now, because one processor would be handling CVS 
and the other the file and net IO.

--
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter