[Mono-dev] [Mono-list] Per-process memory overhead

[Chris Morgan]

On Fri, Sep 5, 2014 at 8:03 PM, Chris Morgan <chmorgan at gmail.com> wrote:

> Posting to the devel list to see if anyone has any other ideas. I'd love
> to get the overhead of these processes down rather than be worried about
> running out of memory or having to rewrite code in c/c++...
>
>
> On Sun, Aug 31, 2014 at 10:26 AM, Agustin Gimenez <geniwab at gmail.com>
> wrote:
>
>> Hi Chris.
>>
>> .net and mono always have some overhead, so I think it's normal.
>>
>> Instead of creating a dozen of processes, why don't you create just one
>> and as many buses as you need inside that process?
>>
>>
> The thought crossed my mind to do that. It isn't the simplest approach
> though but it would work. If it works then its suitable if say 12 of these
> bridges would fit inside of a single 14MB process. If not then I'll end up
> having to reimplement in c and I'd prefer not to go that route.
>
> Is ~14MB really the overhead I should be expecting per-process? I haven't
> tried mono 3.6 yet but nothing in the release notes indicated a large
> memory overhead savings.
>
>
>
>
>
>> Cheers.
>> El 31/08/2014 02:52, "Chris Morgan" <chmorgan at gmail.com> escribió:
>>
>>>  Hello.
>>>
>>> I'm looking to use mono for some dbus bridges with dbus-sharp. I've got
>>> a pretty simple bridge, a couple of classes and a single dbus interface
>>> that bridges to a socket in a console application. It looks like each
>>> instance has ~14MB of memory overhead, from smem output:
>>>
>>> 30038 cmorgan  mono display_interface.exe         0    16792    19650
>>>  23488
>>>
>>> So, 16.7MB USS, 19.65MB PSS and 23.48MB RSS.
>>>
>>> Using mono 3.4 on Fedora 20.
>>>
>>>
>>> I ran the alloc profiler on the application and it looks like there was
>>> some 700k of memory allocated in the application itself, quite small
>>> compared to the process memory.
>>>
>>> I'd like to be able to use mono to create a dozen or more of these dbus
>>> bridges but the embedded arm system I'm using only has 512MB of ram.
>>>
>>> I haven't tested on the arm platform yet, but I'm assuming a similar
>>> amount of overhead for each process.
>>>
>>> Is this a normal amount of overhead per-process? Thoughts on how I might
>>> be able to reduce it?
>>>
>>> Chris
>>>
>>>
>>> _______________________________________________
>>> Mono-list maillist  -  Mono-list at lists.ximian.com
>>> http://lists.ximian.com/mailman/listinfo/mono-list
>>>
>>>
>
>

Anyone have any experience in this area of trying to run several mono
applications on an embedded system with limited memory?

Chris
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