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Date:      Sun, 24 Jun 2012 21:31:00 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Mateusz Guzik <mjguzik@gmail.com>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: reason for "magic" crashes.
Message-ID:  <alpine.BSF.2.00.1206242130330.73860@wojtek.tensor.gdynia.pl>
In-Reply-To: <20120624190853.GB15899@dft-labs.eu>
References:  <20120623162415.303430@gmx.com> <alpine.BSF.2.00.1206231947160.40095@wojtek.tensor.gdynia.pl> <alpine.BSF.2.00.1206241856090.73001@wojtek.tensor.gdynia.pl> <20120624180526.GA15899@dft-labs.eu> <alpine.BSF.2.00.1206242049230.73675@wojtek.tensor.gdynia.pl> <20120624190853.GB15899@dft-labs.eu>

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>
> Are you asking about overhead of DDB or all debug options?
all. invariants, witness etc.

>
> I don't think that DDB support can be accounted for slowdown.
>
> As for the rest, it's hard to say. I guess it depends on your workload,
> also I never performed any benchmarks to compare this and I'm unaware of
> any.
>
> In other words, you have to test it yourself.

we will see.



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