BRP5 very fast host
27 Jan 2014 19:50:19 UTC
Topic 197361
(moderation:
Please can somebody knowledgeable check out this tasks:
http://einsteinathome.org/host/10242690/tasks
That host is managing some suspiciously fast runtimes with BRP5, but good deal of them eventually turn up with validation errors. What could be wrong? Is GPU reporting false runtimes?
BRP5 very fast host
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Due to the validation errors it surely looks like he's pushing his GPU too hard. But the runtimes alone are not alarming: he's using Tahiti, which is almost AMDs fastest chip. The top 3 hosts are using them as well, and are showing longer runtimes. But we don't know how many WUs they run in parallel.
Quick estimate: the 2nd fastest host achieved an RAC of 250k with 2 GPUs. Let's neglect the CPU credits, since it won't significantly exceed 10k RAC even he's crunching 24/7 Einstein on them. That's 125k credits per GPU per day. Or returning one finished WU on average every 2280s, independent of how many are run in parallel. He'S reporting runtimes around 6400s, so he's likely running 3 WUs in parallel.
Anyway, the host in question shows runtimes around 3700s - which could well be, depending on his configuration.
MrS
Scanning for our furry friends since Jan 2002
RE: Anyway, the host in
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With a little digging... This PCIe2 host is ruuning x1 on the GPU which appears to be clocked at 1.1GHz.
Run times of 2500s/wu are possible with this host/card combo and a bit of config.
Gord