[XPM] [ANN] Primecoin High Performance | HP14 released!

[mhps]

shutdown every few days without notice
This started happening after hp-8.

Don't know if this is related but I have a win7 laptop that shuts down at night once in a while with the ypool miner. From the system event log it appears that the laptop just weny to sleep.  In power management I had set it so that it should never sleep. It's strange.

Keep an eye on your cpu core temps. Your fan may need a cleaning.

Makes sense. My laptop went to sleep during the hot summer days.

[Trillium]

Clearly -- the interesting thing is that it only happens under the stress of running the primecoin miner

Indeed. Primecoin is also memory intensive, so you could try running http://www.memtest.org/

Laptops are never good at running at 100% utilization though.

My toshiba tecra with i5 begs to differ, running at 100% for the last 3 months 24/7. I have slightly modified its cooling system to blow more air through the 'cleaning access hatch' which is usually used to access the heatsink fins without having to pull the laptop apart. It runs at 75 deg C and the CPU is rated (according to intel) to a maximum operating temp of 125 deg C.

But if you just take a random laptop and have no idea about its specifications or cleanliness and start running primecoin on it, you'll have yourself a new paperweight soon enough.

[masterOfDisaster]

Can anyone help with compiling the hp11 miner in ubuntu? I compiled it with the optimizations listed in mikaelh's guide and am only getting 1 CPD, which seems rather low for an FX 8320 octocore...
Thoughts?

You seem to have run into the same problems as I did: https://bitcointalk.org/index.php?topic=255782.msg3199976#msg3199976
And as the architecture of the FX-8320 and the Opteron 3280 is similar (ok, one is Piledriver, the other Bulldozer) I doubt you find a way to bring this thing to speed.
But if you do, please tell me; I failed trying to squeeze more than 0.8-someting CPD out of hp11.

Although each of the four modules in the CPU has a dedicated integer cluster, they behave more like a 4-core CPU with multi-threading than an 8-core CPU - even for integer operations.
My Phenom II 1090T is way faster, although it has only 6 cores...

[ivanlabrie]

Yeah, I know the drill...hmmm, I'll keep trying and I'll overclock it.

[altsay]

My toshiba tecra with i5 begs to differ, running at 100% for the last 3 months 24/7.

 

What did you earn so far?

[Lyddite]

shutdown every few days without notice
This started happening after hp-8.

Don't know if this is related but I have a win7 laptop that shuts down at night once in a while with the ypool miner. From the system event log it appears that the laptop just weny to sleep.  In power management I had set it so that it should never sleep. It's strange.

Keep an eye on your cpu core temps. Your fan may need a cleaning.

Makes sense. My laptop went to sleep during the hot summer days.

Siesta time perhaps? 

[Trillium]

My toshiba tecra with i5 begs to differ, running at 100% for the last 3 months 24/7.

 

What did you earn so far?

$4 (2 blocks) at 0.55 chainsperday (HP11).

[maco]

Want to help Primecoin Network Expand to the masses?   

I am looking for others with Twitter Accounts to give us a hand here in getting Primecoin Media/Press attention.

Find out how to get involved @ https://bitcointalk.org/index.php?topic=305956 and follow http://twitter.com/Primecoiner

We will start tweeting soon, and need you, a supporter, to help us ReTweet the message!

[Tamis]

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

[maco]

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

I am split testing between HP11 and HP10

So far, I seem to be getting better results with HP10 in terms of ChainsPerDay and coins I've mined. However, I've mined 5 blocks in 24 hours... not bad

[Trillium]

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

I know, I also don't have a crystal ball to know future market prices. I made my comment 9 days ago.

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

I am split testing between HP11 and HP10

So far, I seem to be getting better results with HP10 in terms of ChainsPerDay and coins I've mined. However, I've mined 5 blocks in 24 hours... not bad

So in summary:

- Poor statistical assessment with very low values of n
- Unusually high luck or extremely high performance multi-CPU server is what you are mining on
- Confusion about how HP versions work and not really following mikaelh's announcements

A+ effort.

[FanDjangoBTC]

So in summary:

- Poor statistical assessment with very low values of n
- Unusually high luck or extremely high performance multi-CPU server is what you are mining on
- Confusion about how HP versions work and not really following mikaelh's announcements

A+ effort.

I concur entirely. A+ detective work.

[Armchair Miner]

All good suggestions. As far as overheating it is weird that it would happen overnight when ambient temperatures are lower. But it could be that that is the time when primecoin would take up most of the CPU and cause most internal heating.

Issue 1)
I think I have destroyed a HP i7 laptop's screen cable running primecoin at 100% utilization. Might have overheated it. This baby is $50 on ebay plus it takes 103 screws to get to it to replace it -- the replacement cost may be lower than the repair cost. Running on External monitor, not quite a brick yet.

Issue 2, also related)
Now I am running both primecoin and quarkcoin on the same laptop, using only 6 cores total (3 each) out of 8. Both primecoin AND quarkcoin failed at about the same time, with the identical message
"Failed to write block" which shows that is more likely a system wide/laptop problem rather than a problem of primecoin-qt.

Statement like "But if you just take a random laptop and have no idea about its specifications or cleanliness and start running primecoin on it, you'll have yourself a new paperweight soon enough." should be included right next to every primecoin-qt download link

Clearly -- the interesting thing is that it only happens under the stress of running the primecoin miner

Indeed. Primecoin is also memory intensive, so you could try running http://www.memtest.org/

Laptops are never good at running at 100% utilization though.

My toshiba tecra with i5 begs to differ, running at 100% for the last 3 months 24/7. I have slightly modified its cooling system to blow more air through the 'cleaning access hatch' which is usually used to access the heatsink fins without having to pull the laptop apart. It runs at 75 deg C and the CPU is rated (according to intel) to a maximum operating temp of 125 deg C.

But if you just take a random laptop and have no idea about its specifications or cleanliness and start running primecoin on it, you'll have yourself a new paperweight soon enough.

[B.T.Coin]

I know the only answer to this question can be: bad luck.
But this is getting too crazy to be just bad luck so hopefully someone can shed some light on this situation for me.
About a week ago I generated a new wallet with -keypool=10000 and installed this one wallet on all my primecoin miners.
I'm running about 100 celeron processors and together they hit about 6 or 7 blocks a day that appear in the same wallet.
This went on consistant for the first 5 days and now for almost 2 days NOTHING

Surely this can not be just bad luck. Does anybody have a clue what is goin on?
If I check any of the miners, I see primespersec, chainsperday, generate:true, testnet:false.... nothing has changed to these settings over the last days.
And in task manager I see primecoin eating up all cpu-recources. So what can be happening?

I did install some other non-cpu intensive software on these machines recently but I can't see how this is affecting primecoin performance. Especially with taskmanager showing 99% of the cpu to primecoin.
I'm also not on my own fork since the blocks keep counting and the chain is up to date.

Anybody?

[Carra23]

Will the difficulty drop? I am still getting roughly a block a week.

[one4many]

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

    one4many

[one4many]

Will the difficulty drop? I am still getting roughly a block a week.

History says no ... A prediction for the future based on the past, therefore also says no.

A global blackout or at least a blackout in Europe and/or American continent could cause something like it.
Is this likely to happen? No, probably not ... so it will not go down either (with that crazy idea).

If you can thing of other more likely events let us know ... we wait and prepare for it.

   one4many

[B.T.Coin]

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

I understand from your comment that the difficulty is not linear then.
But would such a small change in difficulty have such a big impact?
I will read into the difficulty adjustment of primecoin and if this is true then it may be time to hop onto another cpu coin.

And writing my post did manage to break my bad luck. I found 4 blocks in the last 4 hours

EDIT: I found this in Sunny King's Primecoin Paper:
Eventually I discovered that the remainder of Fermat test could be used to construct a relatively linear continuous difficulty curve for a given prime chain length. This allows primecoin to largely keep the security property of bitcoin.

[binaryFate]

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

I understand from your comment that the difficulty is not linear then.
But would such a small change in difficulty have such a big impact?
I will read into the difficulty adjustment of primecoin and if this is true then it may be time to hop onto another cpu coin.

And writing my post did manage to break my bad luck. I found 4 blocks in the last 4 hours

EDIT: I found this in Sunny King's Primecoin Paper:
Eventually I discovered that the remainder of Fermat test could be used to construct a relatively linear continuous difficulty curve for a given prime chain length. This allows primecoin to largely keep the security property of bitcoin.

Note that instead of considering difficulty, and its progression (linear or not?) which is a difficult question in primecoin apparently, one can just consider the amount of ressources currently devoted to mining. If (variance appart) somebody with constante ressources was finding 6 blocks a day, and now only one, that means the overall computational power used for mining primecoins has been multiplied by 6. I found that unlikely in few days.
 

[Ifaistos]

Anyone got any insights on the rapid increase in difficulty (and price) today ?