20140129, 04:23  #45  
Jul 2003
2^{2}×149 Posts 
Quote:
but the server does not take it 

20140129, 04:56  #46 
"Kieren"
Jul 2011
In My Own Galaxy!
2^{2}×3×7^{2}×17 Posts 
What messages are you getting from the server?
EDIT: I'm not sure that I will have answers, but I am trying to ask some of the right questions. There might be responses from people who know more, by the time we have enough data collected. EDIT2: Those Who Know have stepped in while I was tweaking my comments. Last fiddled with by kladner on 20140129 at 05:05 
20140129, 05:01  #47 
Jul 2003
1001010100_{2} Posts 
i get this message:
No factor lines found: 0 Mfaktc no factor lines found: 0 Mfakto no factor lines found: 0 CUDAPm1factor lines found: 0 CUDAPm1nofactor lines found: 0 Factors found: 0 P1 lines found: 0 LL lines found: 0 Mlucas lines found: 0 Glucas (G29) lines found: 0 Glucas lines found: 0 MacLucasFFTW lines found: 0 CUDALucas lines found: 0 clLucas lines found: 0 ECM lines found: 0 
20140129, 05:02  #48  
P90 years forever!
Aug 2002
Yeehaw, FL
11^{2}·59 Posts 
Quote:


20140129, 05:12  #49 
Jul 2003
1124_{8} Posts 
i sent the following:
P1 found a factor in stage #2, B1=545000, B2=10355000, E=12. UID: ANONYMOUS, M65378393 has a factor: 53709915590644747022698801 and the Report of the server is: No factor lines found: 0 Mfaktc no factor lines found: 0 Mfakto no factor lines found: 0 CUDAPm1factor lines found: 0 CUDAPm1nofactor lines found: 0 Factors found: 1 Processing result: M65378393 has a factor: 53709915590644747022698801 Insufficient information for accurate CPU credit. For stats purposes, assuming factor was found using P1 with B1 = 800000. CPU credit is 2.9322 GHzdays. P1 lines found: 0 LL lines found: 0 Mlucas lines found: 0 Glucas (G29) lines found: 0 Glucas lines found: 0 MacLucasFFTW lines found: 0 CUDALucas lines found: 0 clLucas lines found: 0 ECM lines found: 0 
20140129, 23:54  #50 
May 2013
East. Always East.
11·157 Posts 
Code:
[Mon Jan 27 22:16:17 2014] Iteration: 20656201/32482543, POSSIBLE ERROR: ROUND OFF (0.40625) > 0.40 Continuing from last save file. [Mon Jan 27 22:32:16 2014] Disregard last error. Result is reproducible and thus not a hardware problem. For added safety, redoing iteration using a slower, more reliable method. Continuing from last save file. All twelve DC's matched perfectly, so I have swapped my regular work to version 28.3. 
20140201, 06:06  #51 
"Tony Gott"
Aug 2002
Yell, Shetland, UK
137_{16} Posts 
I have had 2 factors which were not reported.
I have sent an email to George. 
20140203, 20:28  #52 
Oct 2007
London, UK
2434_{8} Posts 
Using version 28.3 of Prime95 on both an Ivy Bridge (3570k) and Haswell (4570) system, I find that the Haswell system is significantly slower at stage 1 ECM, about 40% slower clockforclock.
I've attached a screenshot, but basically, the 3.4 GHz Haswell takes ~47k seconds for 1 curve, while the 4.3 GHz Ivy Bridge takes 26.2K seconds. 3.4 * 47 / (4.3 * 26.2) = 1.418 So 42% extra time accounting for clock speed. The Haswell system has slightly faster RAM and runs no other tasks, while the Ivy Bridge system has me pestering it most of the time. They have the same size L1/2/3 CPU caches. I do not know why there should be such a big difference in performance (and had I known it was such a big gap I would have got another Ivy Bridge!). If anyone can shed light on this I'd be interested. 
20140203, 21:11  #53 
P90 years forever!
Aug 2002
Yeehaw, FL
11^{2}×59 Posts 

20140203, 22:02  #54 
Oct 2007
London, UK
2^{2}×3×109 Posts 
I don't have a record to back this up, but I think v27.9 ran at the same speed. I do have numbers to show that v28.1 also ran at this speed.
I've set CpuSupportsFMA3=0 in local.txt and started it up again (still v28.3), it will be several hours before it's possible to see the effect though, so I'll report back tomorrow. 
20140204, 07:55  #55 
Oct 2007
London, UK
51C_{16} Posts 
Doesn't seem to have had an effect unfortunately.
It was part way through 3 curves when I started it last night, all of which have now finished. But the time it took to run the remaining proportion of the curves is still around the same 47k seconds / curve level. 
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