Re: [Libevent-users] multithreading problem

[Thomas Dial <dialtr@xxxxxxxxx>]

Try JMeter.  I believe AB has bugs. 

Sent from my iPhone

On Dec 16, 2012, at 10:52 AM, BjÃrn K. <bjoernk2@xxxxxxxxxxxxxx> wrote:

> Hello,
> 
> I'm trying to write a simple https server which utilizes multiple cpu cores.
> I call evthread_use_pthreads() and create several pthreads. My
> acceptcb and the thread worker functions are below.
> For some simple test cases it works. If I use a tool like apache ab
> for a perfomance test, I get some weird problems. Running the server
> on OS X 10.8.2 the system becomes unresponsive. I can scroll in open
> windows, but opening new windows or killing the server isn't possible.
> Testing it on an actual Debian Linux with gdb shows a "glibc detected
> corrupted double-linked list" error and the server receives a SIGSEGV.
> I tried 2.1.1 alpha and 2.1.2 alpha. (I need the 2.1 branch because of
> the new EVLOOP_NO_EXIT_ON_EMPTY.)
> 
> Thanks,
> BjÃrn
> 
> =====
> Code
> =====
> 
> static void acceptcb(struct evconnlistener *listener, int sock, struct
> sockaddr *sa, int sa_len, void *arg) {
> 
>    struct bufferevent *bev;
>    SSL_CTX *server_ctx;
>    SSL *client_ctx;
> 
>    server_ctx = (SSL_CTX *)arg;
>    client_ctx = SSL_new(server_ctx);
> 
>    bev = bufferevent_openssl_socket_new(thread_base[nextFree(threads)],
> sock, client_ctx,
>                                         BUFFEREVENT_SSL_ACCEPTING,
> 
> BEV_OPT_CLOSE_ON_FREE|BEV_OPT_THREADSAFE);
> 
>    bufferevent_setcb(bev, readcb, NULL, NULL, NULL);
>    bufferevent_enable(bev, EV_READ);
> 
> }
> 
> 
> static void *worker(void *ptr) {
> 
>    struct event_base **evbase = (struct event_base **)ptr;
>    *evbase = event_base_new();
> 
>    event_base_loop(*evbase, EVLOOP_NO_EXIT_ON_EMPTY);
> 
>    pthread_exit(NULL);
> 
> }
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