yoyo wrote:Yes those ecm_uc_1543642398_np_195_850e6* workunits runs long. I see runtimes from 15 to 30 hours. RAM consumption is high, but will not exceed 1,8 GB RAM.
As for every ecm workunit (not P1 or P2) every 20% a checkpoint is done.
Each ecm runs 5 curves and each curve has a 2 stages where stage 1 runs long and needs less ram and stage 2 runs shorter but needs much RAM. Ration between stage 1 and 2 is roughly 4:1.
Hello, thank you for explanation.
For short WU, there is checkpoint each 1200 seconds !!! Why not for the huge WU who take more than one thousand time to run ???
Then about RAM use of the huge WU, on all my three host (all the same CPU/RAM) ECM, take only a few megabyte !!!
Sometimes about one Giga, but not long (about 10 minuts) !
About your ratio stage 1 and 2. (I not consider RAM)
All very "rough estimation"
If stage 1 take 25% running, It would say, if the first stage take 12 hours to run, so the stage two would need 3 hours to finish !
It is not !
Those monster WU were at 20% after about 3 hours.
20 hours later, only 40% ! So I think the ratio is not 4:1 but 1:4.
It will says, those WU will be finished AFTER deadline (only four days !!!)
The small WU have a deadline of 10 days. The monster only four days (running 24/24, without restart, logoff,......)!!!
I hope the given credits will also be consequent !? On the same host (to be able to compare)
P1 WU runs on my host 29,300sec for a credit of 322.97 (ratio : 39.6 credit / hour)
And ECM_xy_.or hc, runs about 1.2 hour (3900sec for 76.98 credits) (ratio : 71 credit / hour)
Twice more for small WU !
It already shows how longer WU, how less credits !!!
And not considering no checkpoint , errors, host restart with lost of crunched part
I can not do any update on my host who require a restart because the very long WU block all !
My conclusion, the next time, I receive such "monster", I cancel it.
Sorry.It is not the goal of the research, but I will not block some hostys for nothing.
Look my signature, you will see I crunch on several project, also my team.
I will let finish the monster on one host, with hope on credits according running time.
The other still running, I will abort if they take more than 8 hours to completion.
Once again, sorry, but I need to do maintenance on my hosts.
Suggestion : reduce the size of the WU ! The monster requires 266TFLOPs, yes two hundred sixty-six TERRA FLOPs !!!
Only CPU !!!
To compare a i7-2600k OC to 4.0Ghz have a power of 4.22 GFLOPS (and 13.5 GINOPS (integer).