Threaded 6.4 code compiled under 9.0 uses a lot more memory?..

[Karl Pielorz]

--On 31 October 2012 16:06 +0200 Konstantin Belousov <kostikbel at gmail.com> 
wrote:

> Since you neglected to provide the verbatim output of procstat, nothing
> conclusive can be said. Obviously, you can make an investigation on your
> own.

Sorry - when I ran it this morning the output was several hundred lines - I 
didn't want to post all of that to the list 99% of the lines are very 
similar. I can email it you off-list if having the whole lot will help?

>> Then there's a bunch of 'large' blocks e.g..
>>
>>  PID              START                END PRT  RES PRES REF SHD  FL TP
>>  PATH 2010        0x801c00000        0x802800000 rw- 2869    0   4   0
>> ---- df 2010        0x802800000        0x803400000 rw- 1880    0   1   0
>
> Most likely, these are malloc arenas.

Ok, that's the heaviest usage.

>> Then lots of 'little' blocks,
>>
>> 2010     0x7ffff0161000     0x7ffff0181000 rw-   16    0   1   0 ---D df
>
> And those are thread stacks.

Ok, lots of those (lots of threads going on) - but they're all pretty small.

My code only has a single call to malloc, which allocates around 20k per 
thread.

Obviously there's other libraries and stuff running with the code - so 
would I be correct in guessing that they are more than likely for most of 
these large blocks?

-Karl