Re: [naviserver-devel] Upload Progress

[Vlad S. <vl...@cr...>]

Spool thread can be a replica of driver thread, it will do the same as 
driver and then pass Sock to the conn thread. So making it C-based is 
not that hard and still it will be fast and small.

Plus, upload statistics now will be handled in the spool thread, not 
driver thread, so no overhead and slowdown.

So we read up to maxreradahead, then queue it into spooling thread and 
spooling thread will give it to conn thread. Spooling thread will use 
same Sock/Driver structures, actually Sock will not see any differences 
between running in driver thread or spooling thread.

I can try to provide test of using spooling thread along with driver 
thread today if i will have time.

Zoran Vasiljevic wrote:
> 
> Am 03.01.2006 um 11:21 schrieb Andrew Piskorski:
> 
>> Hm, does Tcl support asynchronous (non-blocking) IO for both network
>> sockets and local files?  Tcl has 'fconfigure -blocking 0' of course,
>> but I don't know for sure whether that really does what you want for
>> this application.  If Tcl DOES support it adequately, then all the
>> previous questions about how to do cross-platform asynchronous IO from
>> C vanish, which is a nice bonus.
> 
> 
> Tcl does this properly by implementing non-blocking IO (O_NONBLOCK or  
> O_NDELAY)
> and adding their own event-loop processing salt. This works for both  files
> and sockets.
> 
> The truble is: you need a fully loaded Tcl for that. But we do have it
> anyways. If we restrict that across limited number of spooling threads,
> the overhead might not be large. Normally I'd start with spoolthread- 
> per-cpu
> but the infrastructure must be made so that it allows several spooling
> threads to gain from multiple-cpu's in modern boxes.
> 
> Zoran
> 
> 
> 
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-- 
Vlad Seryakov
571 262-8608 office
vl...@cr...
http://www.crystalballinc.com/vlad/