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+--- Thread: New oclhashcat-plus and speed poblems... (/thread-2586.html)
New oclhashcat-plus and speed poblems... - SHÃ…KA - 09-03-2013
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?!
RE: New oclhashcat-plus and speed poblems... - mastercracker - 09-03-2013
Which versions of OclHashcat are you referring to? Maybe a difference in the default workload tuning (-n and -u)?
RE: New oclhashcat-plus and speed poblems... - SHÃ…KA - 09-03-2013
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"RE: New oclhashcat-plus and speed poblems... - mastercracker - 09-03-2013
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.
RE: New oclhashcat-plus and speed poblems... - SHÃ…KA - 09-03-2013
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...
RE: New oclhashcat-plus and speed poblems... - atom - 09-03-2013
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
RE: New oclhashcat-plus and speed poblems... - mastercracker - 09-03-2013
(09-03-2013, 07:47 PM)atom Wrote: Make sure to read the release notes. You need to prepare your dictionariesI 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.
RE: New oclhashcat-plus and speed poblems... - SHÃ…KA - 09-03-2013
(09-03-2013, 07:47 PM)atom Wrote: 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.
(09-03-2013, 07:56 PM)mastercracker Wrote: Just remember that 0.14 has surely a timebomb to it and will stop working in about 4 months from now.
???
RE: New oclhashcat-plus and speed poblems... - epixoip - 09-04-2013
(09-03-2013, 08:18 PM)SHÃ…KA Wrote: 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.
RE: New oclhashcat-plus and speed poblems... - SHÃ…KA - 09-04-2013
(09-04-2013, 07:12 PM)epixoip Wrote: 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.