Posts by Jim1348
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1) Message boards : Number crunching : All new! (Message 1065)
Posted 17 Aug 2016 by Jim1348
This is one of the few projects where Windows is faster than Linux. Running on a real core of an i5-3550 under Ubuntu 16.04, a 1.05 Beta takes 30 1/2 hours. Running on a virtual core of an i7-4771 (though with only four cores active, so that it is effectively a full core) under Windows 7 64-bit takes 19 hours. A small part of this (maybe 15% or so) can be attributed to Haswell being faster than Ivy Bridge, but most of it has to be because DENIS 1.05 Beta just runs faster under Windows.

That is fine with me; I have both types of machines available, it is just a question of how to allocate the work.
2) Message boards : Number crunching : Computers running out of work - no work available?? (Message 877)
Posted 4 Jun 2016 by Jim1348
Gibson,

Those are all good points and quite valid. But it is a small project. Something like World Community Grid for example, or Folding (they have CPU work in addition to GPU work) have much larger teams and there is always someone around for a reply or status update of some sort. You are of course aware of these yourself; you can always check back here once in a while.
3) Message boards : News : New WUs Generation will be paused (Message 721)
Posted 29 Nov 2015 by Jim1348
There is usually no way to delete your account on any BOINC project, but if you just want to detach BOINC from a project, you just use the "Remove" button in the "Projects" tab of BOINC Manager.

However, there is no need to even do that. Just add whatever project you want, and leave DENIS attached. You will get new work when it arrives.
4) Message boards : News : New WUs Generation will be paused (Message 707)
Posted 24 Nov 2015 by Jim1348
I am currently using Sesef's denis1.6.1_avx2 application. Should I remove it?
5) Message boards : Number crunching : Optimized app ? (Message 622)
Posted 1 Nov 2015 by Jim1348
I assume you don't know about Crunch3r's SSE4.1 app version. This is the one I'm referring to (not sesef's SSE3 one): it's two times faster than AVX2 on my CPU when running one WU at a time without any other application (distributed computing nor not-DC) so no throttling at all. I know it's a really simple scenario but it allows you to understand things easily.
Sure enough on other CPUs it will perform differently than my Haswll CPU with Hyper Threading and factory power limitation (which I removed through Intel extreme tuning utility though), but I wrote it clearly that I was referring to my particular case.

EDIT
Corrected typos

I tried Cruncher's app when it first came out; it was slightly faster than Sesef, but I don't think better than the AVX2 that I recall. I hope that is simple enough.
6) Message boards : Number crunching : Optimized app ? (Message 619)
Posted 1 Nov 2015 by Jim1348
My tests show the following on an i7-4771 CPU, Win7 64-bit:
Comparison of Sesef's DENIS optimizations on the "3XP 1800" series work units:

With Sesef 1.6.1 AVX2 optimization:
DENIS running on 8 virtual cores - 9 minutes 42 seconds (CPU temp - 63 C average)
DENIS running on 4 virtual cores (other 4 cores free) - 7 minutes 7 seconds (CPU temp - 55 C average)

With Sesef 1.5.5 SSE3 optimization:
DENIS running on 8 virtual cores - 10 minutes 43 seconds (CPU temp - 60 C average)
DENIS running on 4 virtual cores (other 4 cores free) - 8 minutes 9 seconds (CPU temp - 54 C average)

So in each case, the AVX2 optimization is faster than the SSE3 optimization. I doubt that Sesef would have released it otherwise.
However, the temps can build up, especially if you have a GPU card. That could cause throttling of the CPU in some cases, thus lowering its speed.
7) Message boards : Number crunching : Optimized app ? (Message 590)
Posted 26 Oct 2015 by Jim1348
The AVX2 version looks very good to me. For the 600 series, I am getting about 2 minutes 32 seconds running on four cores of an i7-4771 (another core supports a GPU on Folding, and the other three cores are largely free). This is on Win7 64-bit. The core temps are a little higher, which is usual for AVX2 work, averaging about 70 C now.
8) Message boards : Number crunching : Optimized app ? (Message 515)
Posted 29 Sep 2015 by Jim1348
All this gives about 30% speed improvement over 1.4.1

It is now over 10x as compared to the official DENIS version (Win7 64-bit, i7-4771).

Thanks a lot.
9) Message boards : Number crunching : 2nd night that 3 computers have been unable to upload completed work units (Message 484)
Posted 19 Sep 2015 by Jim1348
On some sites, there are DNS problems. A few months ago, I could not get to some distributed computing site (I think it was Folding). It turned out that the DNS server supplied by my ISP couldn't reach it, and I switched over to Google. That is 8.8.8.8 (Primary) and 8.8.4.4 (Secondary), though I don't know if it works outside the U.S. (I set it up in my router Network WAN settings.)
10) Message boards : Number crunching : 2nd night that 3 computers have been unable to upload completed work units (Message 482)
Posted 19 Sep 2015 by Jim1348
Not a problem that I can see here in the U.S. My logs show that I have been uploading and downloading regularly (Win7 64-bit, BOINC 7.6.9, running four cores on an i7-4771). The DENIS homepage and forum seem to be OK also.
11) Message boards : Number crunching : "DENIS needs 953.7 MB disc space free" (Message 474)
Posted 16 Sep 2015 by Jim1348
I wonder... maybe free space is causing my task issue (http://denis.usj.es/denisathome/forum_thread.php?id=66) but maybe not.

There should be a notice in the BOINC event log if it hits the limit, and then it won't download any more. However, the DENIS files themselves are quite small, so you would have to be right on the edge of exceeding the limit before you would be limited to a single download. I suppose it is possible, but your 1 task limit is probably due to something else.

Do you have BOINCTasks? It is a lot easier to read the log if you do (as shown in the "Messages" tab). I think there is a version for Linux.
12) Message boards : Number crunching : Optimized app ? (Message 454)
Posted 6 Sep 2015 by Jim1348
I think they are saying that they need to come out with versions for Linux, etc. and can't do that with just the optimized app itself.
13) Message boards : Number crunching : No tasks for one pc but lots for other pc (Message 432)
Posted 1 Sep 2015 by Jim1348
I used to run Climate Prediction Net with World Community Grid/CEP2, and they did not get along very well. I can remember times when there was no CPDN work available, but still the CEP2 would not download and at least one core was idle. Maybe that is fixed with later BOINC versions, but now I just avoid that combination. It might be something similar with DENIS. You could try removing DENIS from the BOINC manager (and CPDN if it is still attached) and then adding the DENIS project back again.
14) Message boards : Number crunching : No tasks for one pc but lots for other pc (Message 430)
Posted 1 Sep 2015 by Jim1348
Are you running other BOINC projects on the second machine? If you have done a lot of DENIS tasks recently, then the BOINC scheduler may decide it is time to run the other ones. That is especially so if you have added a new project to the second machine; BOINC will prefer it for awhile (about a week on my machines) before returning to the first project.
15) Message boards : Number crunching : "DENIS needs 953.7 MB disc space free" (Message 410)
Posted 24 Aug 2015 by Jim1348
Thanks. I don't want to impact future projects that might have larger files of course, but maybe it is possible.
16) Message boards : Number crunching : "DENIS needs 953.7 MB disc space free" (Message 405)
Posted 21 Aug 2015 by Jim1348
I sometimes get the above error message in the BOINC log when running DENIS, since I place the BOINC Data folder on a ramdisk that is only 1023 MB in size (the maximum of the DATARam free edition). However, DENIS itself uses very little disk space - less than 10 MB even with all cores running and several jobs in the buffer. So there is no problem if I run only DENIS, but when I try to run other projects (e.g., WCG, Rosetta, etc.) then I quickly run out of space.

So I am wondering whether it would be possible for DENIS to reduce its required minimum disk space to something smaller, maybe 500 MB, which is what World Community Grid MCM and UGM require?
17) Message boards : Number crunching : Optimized app ? (Message 396)
Posted 15 Aug 2015 by Jim1348
PPS: I would encourage all who can to donate a little something to Sesef for this great effort as well!

If he will set up a PayPal account, I will do my part.

I think this could be a boost to a lot of the BOINC projects, who may have good scientists but they may not be so familiar with programming. They need some expert help.
18) Message boards : Number crunching : Optimized app ? (Message 392)
Posted 14 Aug 2015 by Jim1348
I am all for faster apps, but the reason that thousands of babies in the U.S. were not deformed by thalidomide is because some FDA official refused to approve it without proper testing.
19) Message boards : Number crunching : Credit New ? (Message 163)
Posted 3 May 2015 by Jim1348
From what little I know about Credit New, it looks like a good idea. I couldn't care less what the absolute numerical value is, as long as it proportional to the actual work done and more or less comparable across projects. Actually, I prefer the smaller numbers that Credit New will give. The increase in numbers due to hardware improvements over the years makes the current system silly and a bit cumbersome.

I will gravitate to projects that use the new system.




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