New oclhashcat-plus and speed poblems...

[SHÃ…KA]

I'm testing new oclhashcat-plus version and I found a speed problem: on AMD HD7950 GPU (13.4 driver) and dictionary+rules setting, attack speed is ~2 GH/s! On same hardware (same driver) and settings, but previous version of oclhashcat, attack speed is ~4 GH/s!! Why?!

[mastercracker]

Which versions of OclHashcat are you referring to? Maybe a difference in the default workload tuning (-n and -u)?

[SHÃ…KA]

No difference:

Code:

oclHashcat-plus v0.15:

oclHashcat-plus64.exe -a 0 -m 0 -p : --session=00000000 -o "D:\HashcatGUI_0301\MD5_found.txt" --outfile-format=3 -n 160 --remove --gpu-temp-abort=80 -r "D:\HashcatGUI_0301\oclHashcat-plus-0.15\rules\d3ad0ne.rule" "D:\HashcatGUI_0301\MD5.txt" "D:\HashcatGUI_0301\Dictionary.txt"

Code:

oclHashcat-plus v0.14:

oclHashcat-plus64.exe -a 0 -m 0 -p : --session=00000000 -o "D:\HashcatGUI_0281\MD5_found.txt" --outfile-format=3 -n 160 --remove --gpu-temp-abort=90 -r "D:\HashcatGUI_0281\oclHashcat-plus-0.14\rules\d3ad0ne.rule" "D:\HashcatGUI_0281\MD5.txt" "D:\HashcatGUI_0281\Dictionary.txt"

[mastercracker]

There are a couple of things to consider. First, is your GPUs all at 99% when you do your tests? Also for the main explanation of the possible differences, read the announcement for v0.15. It's all detailed there.

[SHÃ…KA]

Yes, my GPU works at 99% in both cases. In other words, the new version is ~50% slower than previous version about single-MD5 hash attack (dictionary+rules). It's a huge negative difference! This issue forces us to use both versions...

[atom]

Yes, it's true, it's slower, but not 50%. From my tests single hash MD5 with rule based attacks drop is around 25%

Make sure to read the release notes. You need to prepare your dictionaries

[mastercracker]

Make sure to read the release notes. You need to prepare your dictionaries

I was going to write that. There are many advantages of using 0.15 but it's your choice. Just remember that 0.14 has surely a timebomb to it and will stop working in about 4 months from now.

[SHÃ…KA]

Yes, it's true, it's slower, but not 50%. From my tests single hash MD5 with rule based attacks drop is around 25%

Ok but 25% (~1 GH/s on HD7950) is too a large negative gap and we have to work more on wordlists, especially if they are huge!

Thank you very much for everything else.

Just remember that 0.14 has surely a timebomb to it and will stop working in about 4 months from now.

???

[epixoip]

Ok but 25% (~1 GH/s on HD7950) is too a large negative gap and we have to work more on wordlists, especially if they are huge!

Even though the posted speed is slower your attacks will still probably finish faster due to the new workload dispatcher.

[SHÃ…KA]

Even though the posted speed is slower your attacks will still probably finish faster due to the new workload dispatcher.

I don't think so. I tested simple-MD5, MD5(Unix) and phpBB3 hashes and oclHashcat-plus v0.14 has completed the attack more quickly than about 25-30%. v0.15 version has many other cool features, but it is much slower.