[Squeak-e] first successful CapTP messaging trace

[Robert Withers]

Mark,

On Monday, June 9, 2003, at 12:43 AM, Mark S. Miller wrote:

> At 03:21 AM 6/8/2003  Sunday, Rob Withers wrote:
>> Here is the trace: http://minnow.cc.gatech.edu/squeak/3243
>>
>> It is pipelining messages, but I don't have a proper event-loop, so it
>> doesn't flush the connection buffers at the end of each vat turn - 
>> instead I
>> flush every 10 ms.  Also, the lack of an event loop results in no 
>> partial
>> ordering guarantees.  Proof of this is in the trace showing that the
>> initiating side processes the second resolution before the first 
>> resolution
>> (in the third chunk of messages).
>
> Rob, I don't have anything useful to contribute at this time, but I 
> just
> wanted to say congratulations! This is fantastic!

thank you!  Especially for your explanation on Redirectors:  
http://www.eros-os.org/pipermail/e-lang/2003-March/008632.html  I was 
stepping through the animation like mad for several days.  :)

I fixed the partial ordering by making every eventual process have the 
same priority and adding them to the end of that priority's linked list 
in the scheduler.

I am confused about when to send the GCExportOp, with the corresponding 
wireCount.  ImportTable holds the far handlers to redirectors strongly, 
so they will never finalize.  Additionally, it looks as if the 
redirectors in the exports table and their far handlers in the imports 
table never get lost, so they must be getting reused somehow.

> Btw, this seems like a good opportunity to mention Dean Tribble's
> E-on-Squeak project
> http://www.eros-os.org/pipermail/e-lang/2003-May/008689.html , porting
> Kernel-E, and eventually E itself, onto the Squeak virtual machine.

It should be easy to stitch in this CapTP work using his references.   
Serialization remains an obstacle, since I am not using WOS, yet.

cheers,
rob