Some positive feedback on the responsiveness of bzr(explorer)

[Alexander Belchenko]

Martitza Mendez пишет:
> 
> 
> On Mon, May 9, 2011 at 10:20 PM, John Arbash Meinel 
> <john at arbash-meinel.com <mailto:john at arbash-meinel.com>> wrote:
> 
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> 
>     ...
>      >> Maximum memory consumption during commit was 315MB.  Total page
>     faults
>      >> about 800,000 (on a machine with 2GB RAM).
>      >
>      > What is "Total page faults"?
> 
>     A page fault is when a program wants to access a bit of virtual memory
>     but it isn't actually present in memory.
>     http://en.wikipedia.org/wiki/Page_fault
> 
>     This happens in a variety of contexts. One is during "swapping", when
>     the OS runs out of memory and writes the virtual pages to disk. Then
>     when the program accesses them again, it has to read back from disk.
> 
>     I *think* it might also happen based on how you allocate. I know in
>     Linux you can do tons of mallocs(), but until you touch the memory it
>     doesn't actually assign real memory to your process. I believe you don't
>     hit a page fault during malloc() just during the later access.
> 
> 
> This set of observations was on WinXP (I should have mentioned that).  
> And I'm actually not sure whether or how 'lazy' memory allocation is on 
> WIn32.  Good question.  I suppose I should know.  I'll have to test that 
> when I get a few minutes.

Which tools are you using to get such statistics? Process Explorer?

-- 
All the dude wanted was his rug back