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Message-ID: <33726112.494065.1472817200495@mail.yahoo.com>
Date: Fri, 2 Sep 2016 11:53:20 +0000 (UTC)
From: Sebastian Heyn <sebastian.heyn@...oo.de>
To: <john-users@...ts.openwall.com>
Subject: Question regarding CPU load on GPU tasks
Hi,
at the moment I am doing some cracking research, so my old gaming pc has to deal with some serious load LOL
Now I noticed when I run a wpapsk-opencl vs a wordlist, the cpu load on a single core is 100% solid.
When I fork the task to 4, it is 4x100% (its a quad core cpu) - however the amount of passwords per second is the same. I dont know how to interpret that result. Is the cpu 100% flat out due to some loop in the code, or is it really 100% busy? If so the forking should show some improvement, right?
I am asking because I wonder what would happen if I bought a larger gpu (or 2) - would the cpu become a bottleneck?
Second question: Is openmpi also able to run gpu tasks on several machines?
Greetz,
Basti
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