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Date: Fri, 19 Sep 2014 17:17:46 +0200
From: Albert Veli <albert.veli@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Restart work on mask mode

Have you tried gprof? http://www.thegeekstuff.com/2012/08/gprof-tutorial/

I think clang also has some profiling tools you can try. Haven't tried them
myself.

On Fri, Sep 19, 2014 at 4:46 PM, Sayantan Datta <std2048@...il.com> wrote:

> Hi
>
> I am glad to inform that I'm resuming my work on mask mode and to begin
> with, I'm trying to find the bottleneck on cpu portion of mask mode which
> is quite slower compared to incremental mode.
>
> To my surprise I can't get anything faster than 7.2 Mp/s(compared to
> 15Mp/s on inc mode) even with this simple password generation loop:
>
> while(!crk_process_key("a"));
>
> replacing the original code:
>
> while ((word = rpp_next(&ctx))) {
>         if (options.node_count) {
>             seq++;
>             if (their_words) {
>                 their_words--;
>                 continue;
>             }
>             if (--my_words == 0) {
>                 my_words =
>                     options.node_max - options.node_min + 1;
>                 their_words = options.node_count - my_words;
>             }
>         }
>         if (ext_filter(word))
>             if (crk_process_key(word))
>                 break;
>  }
>
> Manually, for now,  I'm unable to find the bottleneck. So does anyone
> knows if there is any good cpu profiler for linux64 machines ?
>
> Regards,
> Sayantan
>

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