Good morning all!
First time poster, been reading for a while...
I set up of small proof of concept VCL setup, currently with the following:
Broker- workstation (Ubuntu 12.04LTS x64, VCL 1.22), 8GB RAM
Compute node- (Ubuntu 12.04 server x64, Catalyst 13.11 beta1, oclhashcat-plus 0.15) Radeon 7990
Network- dedicated Gb switch, only broker and node on it
This setup was according to the wiki articles, by the way.
I started with a --gpu-loops of 1024, and thought I would try and ramp up the --gpu-accel to see how much I could do with only 8GB RAM. I can get up to --gpu-accel 225, anything higher, it just goes to "cracked" right away, and returns the hashes with blank results- not sure if this is expected due to lack of memory, or I'm doing something wrong?
With --gpu-loops of 1024 of --gpu-accel of 225, I get ~3000K/sec on md5crypt (-m 500); problem is, if I run locally on the compute node I get ~7500K/sec.
I would have thought that with only 2 GPUs, I could get away with gigabit and 8GB RAM- is this just not the case? It's one of those things where I kind of need to get a working setup to justify spending of Infiniband and a bunch of memory. When I run a top during a crack, memory goes to about ~30% with --gpu-accel of 225.
One more thing- the first GPU is reported as 1000mhz, but the second GPU is reported as 555mhz? Both, however, gives the same cracking speed. If I run locally both show as 1000mhz.
I also have two 6970s on hand, would it be worth trying only a single GPU to see if the network/memory handle it better?
Appreciate the help, not sure how to troubleshoot this.
First time poster, been reading for a while...
I set up of small proof of concept VCL setup, currently with the following:
Broker- workstation (Ubuntu 12.04LTS x64, VCL 1.22), 8GB RAM
Compute node- (Ubuntu 12.04 server x64, Catalyst 13.11 beta1, oclhashcat-plus 0.15) Radeon 7990
Network- dedicated Gb switch, only broker and node on it
This setup was according to the wiki articles, by the way.
I started with a --gpu-loops of 1024, and thought I would try and ramp up the --gpu-accel to see how much I could do with only 8GB RAM. I can get up to --gpu-accel 225, anything higher, it just goes to "cracked" right away, and returns the hashes with blank results- not sure if this is expected due to lack of memory, or I'm doing something wrong?
With --gpu-loops of 1024 of --gpu-accel of 225, I get ~3000K/sec on md5crypt (-m 500); problem is, if I run locally on the compute node I get ~7500K/sec.
I would have thought that with only 2 GPUs, I could get away with gigabit and 8GB RAM- is this just not the case? It's one of those things where I kind of need to get a working setup to justify spending of Infiniband and a bunch of memory. When I run a top during a crack, memory goes to about ~30% with --gpu-accel of 225.
One more thing- the first GPU is reported as 1000mhz, but the second GPU is reported as 555mhz? Both, however, gives the same cracking speed. If I run locally both show as 1000mhz.
I also have two 6970s on hand, would it be worth trying only a single GPU to see if the network/memory handle it better?
Appreciate the help, not sure how to troubleshoot this.