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

[SC123]

Hmm what would be the optimal sievesize for a Ivy 3570K ?

[1714466468]

1714466468

[mikaelh]

@mikaelh
I presume you can`t do AVX2 optimization, or primecoin can not benefit from it?
pooler did AVX2 optimization on cpuminer and gain is ~90% with haswell

This is about primes, not about hashes.

On my A8 my PPS actually rose rather then fell with sievesize=2000000 in the conf, though it rose very minimally, which makes me wonder if it does anything at all.

If you really want, you can check that with the debugging options.

debug=1
printmining=1

You should see that the sieve size is whatever you set it to in debug.log.

[itod]

Mikael, how do you decide which sievesize to set for which cpu? Or just experimenting in testnet? How many testnet blocks are there btw, wanted to test too, but downloading those 20k+ blocks from only 3 connections takes ages...
@ryen: sievesize=1000000 should work.

If somebody tested for optimal sievesize on testnet and DigitalOcean small droplet I would be grateful if he shares that value he got, just trying to avoid duplicate work.

[eule]

Mikael, how do you decide which sievesize to set for which cpu? Or just experimenting in testnet? How many testnet blocks are there btw, wanted to test too, but downloading those blocks takes ages...

I'm guessing the optimal value may have something to do with L2 and L3 cache sizes.

Large sieves also take long to build which means a new block may arrive before it's complete.

Thanks, my i7 930 has 8MB cache aswell so i tried the values 1000000, 2000000 and 3000000 in testnet, 2M seems much faster than 1M indeed, 3M is slower than 2M but faster than 1M.
Finetuning miners to find the best settings is always fun, cheers!

[OnlyC]

Can anyone show me how to use testnet to compare blocks between sievesize values?

on linux please

[drummerjdb666]

URGENT!!!!!

Has anyone else just seen a 25% drop in PPS?  I'm getting this on every single machine/VPS I have running.  Happened in the last 30 mins.  Perhaps due to the >8.0 diff increase?

~$ primecoind getdifficulty
8.02573842

Yes pps dropped even more than 25% on my rigs.

Yes down from 6143 to 4208

same drop here..

Same here, but I've gotten two blocks since the drop, which seems luckier.  I wonder how the difficulty gets calculated if not by PPS.  Because a network wide PPS drop you would expect a diff drop too. I derped, per Aggro's post below.

Edit: in another thought, the difference in diff rise between releases of hp1 and hp2 indicates clearly that hp2 is doing better.

I got three blocks since the release of hp2..  you think one of you guys could post a .conf you are using for hp3 in win7?  pleaase?

[dudeguy]

Mikael, how do you decide which sievesize to set for which cpu? Or just experimenting in testnet? How many testnet blocks are there btw, wanted to test too, but downloading those blocks takes ages...

I'm guessing the optimal value may have something to do with L2 and L3 cache sizes.

Large sieves also take long to build which means a new block may arrive before it's complete.

Thanks, my i7 930 has 8MB cache aswell so i tried the values 1000000, 2000000 and 3000000 in testnet, 2M seems much faster than 1M indeed, 3M is slower than 2M but faster than 1M.
Finetuning miners to find the best settings is always fun, cheers!

So for 3MB L3 (ivy i3 3225) would you set your value to 1000000? What do you type in the .config file? Should I get rid of my .config file (using windows HP3 build) because I haven't changed any settings since the 2nd day of launch?

[reb0rn21]

for windows just run it like this:
primecoin-qt.exe -sievesize=2000000

conf file don`t work for me

[eule]

So for 3MB L3 (ivy i3 3225) would you set your value to 1000000? What do you type in the .config file? Should I get rid of my .config file (using windows HP3 build) because I haven't changed any settings since the 2nd day of launch?

Honestly no idea, best way to find out is to connect to the testnet and compare block finding rate, a 5 minute job.  
Note that my test was really short and i didn't test further.

[megges]

        "category" : "immature",
        "amount" : 13.40000000,
        "confirmations" : 230,


how long does it takes to mature?

[UNOE]

I'm confused about building a 64bit client on Ubuntu.  What flag do I use.

[Magic8Ball]

        "category" : "immature",
        "amount" : 13.40000000,
        "confirmations" : 230,


how long does it takes to mature?

Block reward has gone down to 13. Thats a sharp decrease.

[Vannicke]

for windows just run it like this:
primecoin-qt.exe -sievesize=2000000

conf file don`t work for me

I found the opposite on win7 and win8 .... conf worked, but batchfile primecoin.qt.exe -sievesize=2000000 still showed 1000000 in debug.log

Once I had sievesize=2000000 in conf it did work.

[eule]

Block reward has gone down to 13. Thats a sharp decrease.

primecoind getdifficulty
8.65543556
Rising fast.

[Vannicke]

Block reward has gone down to 13. Thats a sharp decrease.

primecoind getdifficulty
8.65543556
Rising fast.

Yup, looks like everyone's getting in some cpu mining / loads of digitalocean accounts and amazon accounts firing up.

[OnlyC]

Can anyone show me how to use testnet to compare blocks between sievesize values?

on linux please

pls anyone, will share my optimal sievesize 

[dudeguy]

Found any blocks?

you think somebody after a mins of the release found a block very easy. i have more than 24 hrs before this release @900pps and not found nothing, give more than 3 hrs for check this

I sure hope this was tested before released.

It's likely folks will still find blocks with it, but without running on testnet for a few hours and comparing the results to another build it won't tell us much. Just reduce the prime sieve size on Sunny's client, boom your PPS goes through the roof.

Well, to be honest, I was slightly concerned about changing the sieve size. I'm not 100% sure about the full effects. What I do know is that when you reduce it to 100,000 you stop getting millions of L1 write misses.

I have found quite a lot of blocks on mainnet with the reduced sieve size. I will try to get some better comparison numbers on testnet.

So would you recommend setting a sieve size of 100,000 in the .config file by typing "sieve size=100000" ? Also should "gen=1" be there or is that not doing anything? I can't remember for the life of me why I had entered that in my config file a few days ago.

[Stinky_Pete]

So would you recommend setting a sieve size of 100,000 in the .config file by typing "sieve size=100000" ? Also should "gen=1" be there or is that not doing anything? I can't remember for the life of me why I had entered that in my config file a few days ago.

Probably to start mining automaticaaly when you start PrimeCoin.exe

[Lauda]

Block reward has gone down to 13. Thats a sharp decrease.

primecoind getdifficulty
8.65543556
Rising fast.

Wow it keeps growing faster and faster. We will hit 9 soon I think 

[bitwarrior]

And no one will bother mining this coin and shift to other more profitable ones.. sadly but true, due to other people's greed, they are killing this coin.