[Mono-dev] TCP Async

[Greg Young]

Actually its worse than that. We have found that *anything that uses
callbacks* suffers from the same problems (eg any async API, say a
timer).

We have looked at writing our own socket library but the scope of
these bugs is amazing.

On Thu, Aug 9, 2012 at 9:00 AM, gelin yan <dynamicgl at gmail.com> wrote:
>
>
> On Thu, Aug 9, 2012 at 1:47 PM, Greg Young <gregoryyoung1 at gmail.com> wrote:
>>
>> An update to this. Some of the failures have been taken away (also
>> with our patch mentioned). However simple test apps using sockets (or
>> it appears any callbacks) in mono are not stable.
>>
>> This I would imagine prevent most from actually being able to use mono
>> for any serious work.
>>
>> Greg
>>
>> On Sun, Jul 22, 2012 at 7:20 AM, Gonzalo Paniagua Javier
>> <gonzalo.mono at gmail.com> wrote:
>> > On Tue, Jul 17, 2012 at 7:49 AM, Greg Young <gregoryyoung1 at gmail.com>
>> > wrote:
>> >> Hey all.
>> >>
>> >> As this is a big issue for us and I feel a huge problem for mono in
>> >> general
>> >> at this point as it means sockets basically dont work which is a strong
>> >> point of unix environments, I would like to propose something I have
>> >> done in
>> >> the past. I am willing to offer a bounty (personally) for a working fix
>> >> to
>> >> this section of code of $500 usd (more if done quickly).
>> >>
>> >> Acceptance criteria is the included test working in a stable fashion in
>> >> Linux / bsd but just Linux is acceptable as well,
>> >
>> > Hi Greg.
>> >
>> > I have the test working with a tiny little change in mono master
>> > (applies cleanly to mono-2-10) *and* a change in your test code to
>> > avoid using ConcurrentQueue (I keep getting array index out of bounds
>> > here).
>> > The change to your test code is here: https://gist.github.com/3158357
>> >
>> > Last line before I interrupted the test (server):
>> > # Total connections: 100. Out:   3778.3kb/s  In:   3549.7kb.s  Pending
>> > Send: 0  In Send: 0  Pending Received: 0
>> >
>> > Last line before I interrupted the test (client):
>> > # Total connections: 100. Out:   3548.5kb/s  In:   3851.7kb.s  Pending
>> > Send: 10278  In Send: 45359  Pending Received: 0
>> >
>> > Can you make the payment through Paypal? :-)
>> >
>> > -Gonzalo
>>
>>
>>
>> --
>> Le doute n'est pas une condition agréable, mais la certitude est absurde.
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>
>
>
> Hi All
>
>    Last year, I did try to port my program on mono. This program use socket
> extensively. It worked on .net flawlessly but raised many arcane exceptions
> & assertion errors with mono.  Many exceptions were related to GC & threads.
>
>       It would be not easy to debug without a clue so finally I had to give
> up using mono for this purpose. I have searched mono, socket on google
> however there are no more further info. I doubt maybe just maybe people here
> are not interested in using mono with TCP/UDP directly. If they need, they
> might consider using platform-specified API to fulfill their purposes.
>
> Regards
>
> gelin yan
>
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>



-- 
Le doute n'est pas une condition agréable, mais la certitude est absurde.