Posts by David Riese

1) Message boards : Cafe : Last Person to Post - Version 5! (Message 1115)
Posted 18 days ago by David Riese
Post:
No dinner for me last night. Too tired to eat, as I teach class from 5:30 - 8:00 pm on Tuesdays and typically don't get home until 9:00 pm. Am drinking my second cup of coffee of the morning and settling in to get some work done. Woo-hoo!
2) Message boards : Cafe : Last Person to Post - Version 5! (Message 1108)
Posted 20 days ago by David Riese
Post:
Mikey, congrats on the 200th post!

Now, however, I am winning!
3) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 937)
Posted 23 Aug 2018 by David Riese
Post:
Since I use the message board, I should probably put one core of my lappy on Collatz. But I get tired of keeping up with the thing. I gets unplugged occasionally and its battery gets run down. If I don't check it periodically then the WUs time out. Which doesn't do anybody any good. You see, the lappy is in the living room. My pi is in the office and my daily drive. (I just found reddit doesn't play nice with only 1 GB of RAM)

Oh well. I shall be the winner because Mikey likes me the best. That and because I'm 3 pounds short of my mini-goal of being half the weight I started at. Go me!


Congratulations on reaching the milestone! Woo-hoo!
4) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 908)
Posted 11 Aug 2018 by David Riese
Post:
Sorry, Steve - I think *I* am the winner!
5) Questions and Answers : Macintosh : Optimising the Mac apps (Message 907)
Posted 11 Aug 2018 by David Riese
Post:
Nice crunching with that 960! I have tried to run two 960s in a PowerMac 3,1, but it doesn't appear that the internal power supply can supply enough electricity to power them - the system is incredibly unstable.
6) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 827)
Posted 27 Jul 2018 by David Riese
Post:
Kathryn, congratulations on the progress and good luck with the graduation!

Less than a month until I am back in the classroom. I have prepared approximately 35% of my lecture handouts (for the semester). Got to grind through a consulting gig in DC early next week. Then, the DoD has invited me to submit a proposal to develop new strategies for staging and treating metastatic melanoma patients. Draft is due August 15, with the final version due September 26. It's a great opportunity and I am look forward to the challenge of moving my ideas from my brain to the printed page.

Here we go ....
7) Questions and Answers : Macintosh : Optimising the Mac apps (Message 814)
Posted 19 Jul 2018 by David Riese
Post:
[One more thing, Martin. If using the Startup Manager doesn't solve the problem, I would check (using your Mac5,1) who flashed the GPU. Whenever possible, I buy GPUs that had been flashed by MacVidCards. They seem to have a very positive reputation in the Mac GPU community. Not only will they sell you cards that they have flashed, but they will flash cards that you send to them.


This is an unfleshed card, overclocked too -- which I heard can be problematic.

Didn't get a chance to play with it again until this morning.

As there was a Mac OS security update, I did that first... then an NVIDIA driver update to 346.03.15f16.

Then I stuck the card in and it just worked without me doing anything else.

And Mikey, yes, this is an old OS and matched older driver as this Mac is 10 years old.


Glad to hear that the issue has been resolved! Please give us updates on how this GPU works out for you. I have two GTX 960s, each alongside an AMD Radeon HD5770 GPU in a MacPro 3,1. Mine generate about 1.6M credits/day crunching Collatz and Einstein tasks. One of the great thing about my GTX 960s is that they require only a single PCI-E power lead, allowing me to use a stock MacPro 3,1 setup to power the GTX 960 and the HD5770.
8) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 812)
Posted 19 Jul 2018 by David Riese
Post:
You know when you're so certain you did something it comes as a quite a big surprise when you later realise you did nothing of the sort? Well...

David :)

You know here: https://boinc.thesonntags.com/collatz/forum_thread.php?id=36&postid=725? Where you said this:

Anniet, your students are not out for the summer, yet?


I thought I said: "Our universities are, but not the primary and secondary schools yet. They'll be freed at the end of next week* I think :)" ... except it seems I didn't, or if I did, I neglected to actually do anything useful with it, like click "post reply".

Let's hope this time I do.

*Wave to Steve and Mikey and Kathryn and everyone* :)

edit: * which is now this week... I think...


Similar things happen to me all the time. I have these conversations in my head but apparently I don't REALLY have them. My wife claims it is the effect of my advancing age. Boooooooooo! In any event, I hope you are enjoying the summer!


Sorry David it happens because our minds don't process tasks as fast as we used to do when we were younger and things get lost in the transfer. Humans are NOT multi-taskers we can just switch between tasks very fast, but as get older things don't work as fast as they used to, probably too much stuff in there to think thru.


I HOPE it's because there is "too much stuff in there to think thru"! Some of the alternative explanations are quite troubling! And despite that sobering thought, everyone have a good day!
9) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 802)
Posted 18 Jul 2018 by David Riese
Post:
You know when you're so certain you did something it comes as a quite a big surprise when you later realise you did nothing of the sort? Well...

David :)

You know here: https://boinc.thesonntags.com/collatz/forum_thread.php?id=36&postid=725? Where you said this:

Anniet, your students are not out for the summer, yet?


I thought I said: "Our universities are, but not the primary and secondary schools yet. They'll be freed at the end of next week* I think :)" ... except it seems I didn't, or if I did, I neglected to actually do anything useful with it, like click "post reply".

Let's hope this time I do.

*Wave to Steve and Mikey and Kathryn and everyone* :)

edit: * which is now this week... I think...


Similar things happen to me all the time. I have these conversations in my head but apparently I don't REALLY have them. My wife claims it is the effect of my advancing age. Boooooooooo! In any event, I hope you are enjoying the summer!
10) Message boards : News : Use at your own risk (Message 788)
Posted 17 Jul 2018 by David Riese
Post:
FWIW, I have earned 4.7M credits in the past 10 hours, which is roughly equal to the rate (10M/day) that I was crunching prior to this problem. I have produced 2882 invalid results. I will report whether this number changes over the next few days. A decrease would suggest that my invalid results have been reconsidered and accepted as valid. BTW, I have not produced any invalid results since 01:17 (UTC) on July 12.


~10M credits in the last 24 hours. Still have 2882 invalid results. Most recent invalid result submitted at 01:17 (UTC) on July 12.


Bas and mikey, I have earned 56M credits in the last 120+ hours (~11M credits/day), so tasks are being distributed to the crunchers and valid results are being accepted. My account is down to 2748 invalid results (from 2882 ~36 hours ago), so I am guessing that some of my invalid results are being reconsidered and accepted as valid. That would also account for my recent productivity (~11M credits/day) being a bit higher than it was prior to the problems (~10M credits/day). I recommend that you too monitor your list of invalid results and see if that list becomes shorter!


Now down to 2715 invalid results. Slicker, if this is due to your efforts, thanks much!
11) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 787)
Posted 17 Jul 2018 by David Riese
Post:
Got a venti iced mocha (with four pumps of raspberry sauce) at my elbow, along with a pile of dose response data from an high throughput screen for novel anti-melanoma agents. My collatz crunchers are all pumping out results. All is good with my world! Hope everything is going well with yours!
12) Message boards : News : Use at your own risk (Message 786)
Posted 17 Jul 2018 by David Riese
Post:
FWIW, I have earned 4.7M credits in the past 10 hours, which is roughly equal to the rate (10M/day) that I was crunching prior to this problem. I have produced 2882 invalid results. I will report whether this number changes over the next few days. A decrease would suggest that my invalid results have been reconsidered and accepted as valid. BTW, I have not produced any invalid results since 01:17 (UTC) on July 12.


~10M credits in the last 24 hours. Still have 2882 invalid results. Most recent invalid result submitted at 01:17 (UTC) on July 12.


Bas and mikey, I have earned 56M credits in the last 120+ hours (~11M credits/day), so tasks are being distributed to the crunchers and valid results are being accepted. My account is down to 2748 invalid results (from 2882 ~36 hours ago), so I am guessing that some of my invalid results are being reconsidered and accepted as valid. That would also account for my recent productivity (~11M credits/day) being a bit higher than it was prior to the problems (~10M credits/day). I recommend that you too monitor your list of invalid results and see if that list becomes shorter!
13) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 777)
Posted 15 Jul 2018 by David Riese
Post:
WOW HOO as Mikey would say!!!!!!!


WOO HOO!!!


And a big WAAAAAR EAGLE, too!
14) Questions and Answers : Macintosh : Optimising the Mac apps (Message 776)
Posted 15 Jul 2018 by David Riese
Post:
Forgot to mention that I found a GTX 960 2GB card on Facebook Marketplace, great condition, boxed and really good price.

However, it will not play nicely with my Mac Pro 3,1 -- running El Capitan and the correct driver.

Just a black screen and failing boot.

Usually I can get access using Remote Desktop or screen sharing if there's a driver problem, but I'm getting nowhere with this one :(

Card works fine in the 5,1 Mac Pros using High Sierra, but I really want to get the 3,1 up and running.

Any ideas?


Older drivers instead of the new ones? That's what we do in Windows machines that use older software, ie XP etc.


One more thing, Martin. If using the Startup Manager doesn't solve the problem, I would check (using your Mac5,1) who flashed the GPU. Whenever possible, I buy GPUs that had been flashed by MacVidCards. They seem to have a very positive reputation in the Mac GPU community. Not only will they sell you cards that they have flashed, but they will flash cards that you send to them.
15) Questions and Answers : Macintosh : Optimising the Mac apps (Message 775)
Posted 15 Jul 2018 by David Riese
Post:
Forgot to mention that I found a GTX 960 2GB card on Facebook Marketplace, great condition, boxed and really good price.

However, it will not play nicely with my Mac Pro 3,1 -- running El Capitan and the correct driver.

Just a black screen and failing boot.

Usually I can get access using Remote Desktop or screen sharing if there's a driver problem, but I'm getting nowhere with this one :(

Card works fine in the 5,1 Mac Pros using High Sierra, but I really want to get the 3,1 up and running.

Any ideas?


Older drivers instead of the new ones? That's what we do in Windows machines that use older software, ie XP etc.


Mikey, drivers for the newer NVIDIA cards are tightly tied not only to the OS X version, but to the build number. Simply put, older drivers will not work with newer versions/builds and vice versa.

Martin, congrats on acquiring a 960 and a Mac3,1! I have frequently encountered this problem in Mac3,1s that contain newer NVIDIA cards. Have you tried accessing the Mac OS X Startup Manager by holding down Alt/Option immediately after the startup chime? Then, select the appropriate startup drive. It appears that sometimes installation of a newer NVIDIA card scrambles the startup process, despite the presence of the correct NVIDIA driver. Sometimes the problem disappears, sometimes it doesn't. In the latter situation, I have to access the Startup Manager every time I want to boot/reboot the machine. Obviously, this is one of the drawbacks in trying to use a relatively modern GPU in a 10-year-old machine! But I love the challenge and the payoff. Good luck! <grin>
16) Message boards : News : Use at your own risk (Message 760)
Posted 13 Jul 2018 by David Riese
Post:
FWIW, I have earned 4.7M credits in the past 10 hours, which is roughly equal to the rate (10M/day) that I was crunching prior to this problem. I have produced 2882 invalid results. I will report whether this number changes over the next few days. A decrease would suggest that my invalid results have been reconsidered and accepted as valid. BTW, I have not produced any invalid results since 01:17 (UTC) on July 12.


~10M credits in the last 24 hours. Still have 2882 invalid results. Most recent invalid result submitted at 01:17 (UTC) on July 12.
17) Message boards : Cafe : Last Person to Post Wins ver 3 (Message 757)
Posted 13 Jul 2018 by David Riese
Post:
Hello Mikey,David, Kathryn,and anniet hope all is is well !


Thanks for stopping by, steverocky. The validator is up and running again and my credit totals and RAC are recovering, so all is good in my tiny portion of the Collatz universe! <g>
18) Questions and Answers : Macintosh : Optimising the Mac apps (Message 756)
Posted 13 Jul 2018 by David Riese
Post:
I'm not questioning motivation.

I'm questioning a reward structure that means that somebody with 10 GTX 1080tis running full tilt 24/7 on Collatz will take a decade attain the same credit as somebody with a GTX960 who signed up with Bitcoin Utopia when it started.

I've also questioned the reward structure in this project too. If it's getting hacked because of big returns -- and instant validation is questionable IMO too -- then maybe they should be dialled back and slowed down a bit?

Primegrid and Amicable Numbers offer rewards that are a 10th and 6th of Collatz and they choke the validation process too. Haven't seen them getting knocked over in the same way.


I absolutely agree that differences in reward structures among BOINC projects can contribute to frustration.

However, I wonder if you are overestimating the impact of Bitcoin Utopia on credit awarded for GPU crunching. According to BOINCStats, I am currently ranked 331st in the world among 4,595,232 crunchers. But, if you take out credits earned by ASIC crunchers, I am currently ranked 113th in the world among 4,595,042 crunchers. Likewise, you are ranked 382nd overall and 162nd when taking out credits earned by ASIC crunchers. So, it appears that most of the BIG BOINC crunchers accrued most of their credits using ASICs, not GPUs.

For example, mikey is ranked 3rd in the world overall on the basis of his 1.636 trillion credits (1.627 trillion earned through Bitcoin Utopia). If you take out credits earned by ASIC crunchers, mikey is ranked 48th in the world on the basis of his 9 billon credits. I have estimated that mikey has earned no more than 1.5 billion credits for crunching Bitcoin Utopia GPU tasks. Thus, less than 0.1% of mikey's credit total can be attributed to Bitcoin Utopia GPU tasks.

I agree that the generous reward structure at Collatz might foster hacking attempts. But how should the system be changed? Decrease the credit awarded for crunching Collatz tasks? SETI@Home tried that approach (through CreditNew) and it certainly caused me to decrease my resource allocation to that project. Although I predict that devaluing Collatz work might slow my inexorable descent through the rankings and allow me to stay ahead of you for a few more days. :-)

In the end I don't think there is much benefit in trying to change Collatz. Maybe I should save some money for some 1080tis, external power supplies, and a big jump in my electric bill. I am absolutely jealous of your setup! <grin>
19) Message boards : News : Use at your own risk (Message 754)
Posted 12 Jul 2018 by David Riese
Post:
FWIW, I have earned 4.7M credits in the past 10 hours, which is roughly equal to the rate (10M/day) that I was crunching prior to this problem. I have produced 2882 invalid results. I will report whether this number changes over the next few days. A decrease would suggest that my invalid results have reconsidered and accepted as valid. BTW, I have not produced any invalid results since 01:17 (UTC) on July 12.
20) Questions and Answers : Macintosh : Optimising the Mac apps (Message 748)
Posted 12 Jul 2018 by David Riese
Post:
I think Bitcoin Utopia results should be dropped entirely.

People with computing kit that would get absolutely nowhere on well established projects like SETI were able to claim work done figures that distorted BOINC's data and will continue to do so for years to come.


It is quite apparent that some projects grant more "credit" than others for an equal investment of hardware, electricity, and time. To be absolutely honest, this one of the reasons (but not the only reason) why I joined the Collatz project, increased my investment in that project, and reduced my investment in other projects (such as SETI). So, this is why I cannot make a blanket statement critical of participation in Bitcoin Utopia; IMHO, the Bitcoin Utopia crunchers are motivated in part by the same issues that motivate me.

But, it is obvious that others feel that my motivation lacks the purity of participating in projects solely on the basis of the underlying science. And those people have the right to that opinion. But to discount my contributions to Collatz solely on the basis of my motivation seems extreme.


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