System Specs:
Intel Core i7 Q2630M (2 Ghz, Turbo upto 2.9 Ghz)
4 GB RAM
Host OS: Windows 7 Home Premium
Guest OS: Ubuntu 11.04, 32 bit
JTR version, 1.7.3 with a precompiled MPI patch. JTR was built using:
make clean linux-x86-sse2
MPICH2 was installed for MPI support.
I am running Ubuntu inside a Virtual Machine using VMWare Workstation. Now, the tricky part is, by default only 1 processor, 1 core is assigned to the VM Image.
with this, if I run the benchmarks, following are the results:
cat /proc/cpuinfo | grep processor
processor: 0
cat /proc/cpuinfo | grep processor | wc -l
1
./john --format=DES --test
Benchmarking Traditional DES [128/128 BS SSE2]... DONE
Many salts: 2512K c/s real, 2537 c/s virtual
Only one salt: 2101K c/s real, 2118 c/s virtual
mpirun -np 4 ./john --format=DES --test
Benchmarking Traditional DES [128/128 BS SSE2]... DONE
Many salts: 2512K c/s real, 10245K c/s virtual
Only one salt: 2108K c/s real, 8448K c/s virtual
There's no change in the real c/s stats, however, what we expect to see, shows up under virtual c/s stats.
It took some time to figure out, that I had to manually assign more cores to the Virtual Machine using VMWare Workstation settings option.
Below screenshot shows how to:
After this was configured, everything was in place :)
cat /proc/cpuinfo | grep processor
processor: 0
processor: 1
processor: 2
processor: 3
cat /proc/cpuinfo | grep processor | wc -l
4
Now, there's a significant increase in the value of real c/s while benchmarking.
mpirun -np 4 ./john --format=DES --test
Many salts: 8935K c/s real, 8940K c/s virtual
Only one salt: 7594K c/s real, 7602K c/s virtual
Now this looks good :)
I need to check the latest openmpi des patch for JTR 1.7.8 which is supposed to speed up DES by 12% to 14%. New s-box expressions were designed which reduces the number of gates used.
Will I get better speed if I use a 64-bit Ubuntu 11.04 and build JTR using linux-x86-64? This will be tested.
Listening Now: Andraculoid - Lifecycle
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