Re: Dar architecture questions

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On 14/10/2012 22:37, Kevin Wormington wrote:
> Dennis,
> 
> Thank you for the detailed reply.  I have done some more testing and you 
> are correct that memory deallocation consumes a considerable amount of 
> time after the stats are displayed.  I re-configured with 
> --disable-special-alloc and the results (below) are quite dramatic. 
> There was a ~600MB increase in memory usage but the execution time is 
> down to less than 10 minutes.

Well I'm surprised by this result. The objective was rather to speedup
the memory allocation than to reducing its usage! When it had been
implemented, it did reduce execution time on the available systems...

>  It appears that memory allocation must be 
> playing a significant part in the total backup time as well.  I am going 
> to re-run the full backup and see what kind of improvement is has as 
> well.  Hopefully I will also get a chance in the next few days to see if 
> I can determine what it is about the special_alloc that causes the 
> slowdown vs system libraries at least for my use case.

I will double check on my side using a gprof. Thanks for your feedbacks!

> 
> Kevin
> 

Regards,
Denis.


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