Hi  Saúl,

I tried as you suggested by not using uv_work_queue and doing just
uv_write on the read callback and then hammering with thousand
connections and requests.
It works absolutely perfect and I also get other callbacks (after_write,
TTY callback)


Ok, so the problem seems to come from the threadpool thing then.

( However, the echo server is just for test purpose. In production
scenario I have to have worker threads to do CPU bound processing on all
incoming requests before I send results to client(s) )


I see.

Now I still didn't get any clue,   with massive incoming requests from
thousands of clients, after doing uv_work_queue calls why only read
callback works and other are inactive?


Looks like the after work callbacks are not getting called for some reason. I'm no windows expert, and I don't see any obvious bug in the windows code, so I really have no clue here :-S

Maybe using the same threadpool for Windows (using the one we have for Unix, that is) would be better. Have a look at this issue comment: https://github.com/joyent/libuv/issues/649#issuecomment-14726848

It shouldn't be difficult to port the Unix threadpool to Windows, but AFAIK no one is working on it at the moment.


Cheers,

--
Saúl Ibarra Corretgé
bettercallsaghul.com

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