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On 07/01/2014 09:44 AM, Ashish wrote:
>
> I am using libuv in console based application being developed on
> Windows XP When my applications memory usage goes high, at certain
> point (at around 2GB) uv_queue_work crashes with "runtime error"
> and sometimes with "R6016- not enough space for thread data"
>
>
> This little piece of code demonstrates the same. The code below
> tries to create 321 threads. (I am using 321 number for demo
> purpose but in original code the number is just 31) 321 is not high
> number of threads on Windows XP. Still why would it crash:
>
>
> void work_in_thread(uv_work_t* work_t) { // Allocate some memory
> char* memory = new (std::nothrow) char[4321];
>
> // Simulate some delay Sleep(3); }
>
> void after_work_in_thread(uv_work_t* work_t, int status) { //
> Recreate just ended thread (to maintain thread count) int RetVal =
> uv_queue_work(loop, work_t, work_in_thread, after_work_in_thread);
> if (RetVal != 0) printf("\nERROR recreating thread"); }
>
> int main() { loop = uv_default_loop();
>
> // Create working threads for (int i=0; i<321; i++) { uv_work_t*
> work_t; work_t = (uv_work_t*) malloc(sizeof(uv_work_t)); int RetVal
> = uv_queue_work(loop, work_t, work_in_thread,
> after_work_in_thread); if (RetVal != 0) printf("\nERROR creating
> thread"); }
>
> uv_run(loop, UV_RUN_DEFAULT);
>
> printf ("\nCame out of loop...");
>
> return 0; }
>
uv_queue_work doesn't do what you think it does. It does not create a
new thread each time you call it, it calls the given function on the
internal threadpool, which has size 4.
On top of that, you are reusing the uv_work_t request in the
after_work_cb, and I think there was a bug in there. Can you try this
patch? https://gist.github.com/saghul/62da49b306618db381c7 (make sure
you are using latest master)
- --
Saúl Ibarra Corretgé
bettercallsaghul.com
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