PiFast

[harleybro]

Has anyone run PiFast? I am trying to figure how to set it to run for the standard results?

[top game 22]

i had the same problem could not get it set up right let me know if you get to run..

[boshuter]

Below is a copy past from a 1M run. (don't look at the time, it was on an old celeron system ;) ). Open the program with the .exe file, not the batch file if you have one. Enter the settings in my copy/paste below for a 1M, you can change the 1M to any number you want when that choice is offered, IE to run a 32M you would enter "32000000".

Program : PiFast version 4.1, by Xavier Gourdon
Computation of 1000000 digits of Pi
Method used : Chudnovsky
Size of FFT : 128 K
Physical memory used : ~ 7577 K
Disk memory used : ~ 0.00 Meg
------------------------------------------------------------
Computation run information :

Start : Sun Apr 01 20:15:49 2007
End : Sun Apr 01 20:15:59 2007
Duration : 10.31 seconds
============================================================
Total computation time : 10.31 seconds (~ 0.00 hours)
============================================================

[sbinh]

This is what I ran on my Dell Inspiron8200 (replace CPU from 1.4 to 2.6GHz)


Program : PiFast version 4.3 (fix 1), by Xavier Gourdon
Computation of 1000000 digits of Pi
Method used : Chudnovsky
Size of FFT : 128 K
Physical memory used : ~ 7769 K
Disk memory used : ~ 0.00 Meg
------------------------------------------------------------
Computation run information :

Start : Sun Apr 01 21:54:24 2007
End : Sun Apr 01 21:54:29 2007
Duration : 4.55 seconds
============================================================
Total computation time : 4.55 seconds (~ 0.00 hours)
============================================================

How do you know if result is good or not? Is there any site that has all results posted?
hwbot perhaps?

[boshuter]

Yes hwbot recognizes this bench and give points for it, results are on hwbot site.

[sbinh]

We can run it in DOS Prompt ..



C:\Games\pifast>Pifast43
PiFast, version 4.3 (fix 1) (Copyright 1999-2003 Xavier Gourdon)
http://numbers.computation.free.fr/Constants/PiProgram/pifast.html
Menu :
[0] Compute Pi with Chudnovsky method (Fastest)
[1] Compute Pi with Ramanujan method
[2] Compute E by the exponential series exp(1)
[3] Compute E by the exponential series 1/exp(-1)
[4] Compute Sqrt(2) (useful for testing)
[5] Define your constant with hypergeometric series
[6] Compute a user constant from a .pifast file
[7] Decompress a result file
[8] Check a compress result Pi file
Enter your choice : 0

Choose your computation mode :
[0] standard mode (no disk memory used)
[1] basic disk memory mode (for big computations)
[2] advanced disk memory mode (for huge computations)
Enter your choice : 0

Number of decimal digits : 1000000
Possible FFT modes, with approximate needed memory :

FFT Size= 128 k, Mem=7769 K (Fastest mode)
FFT Size= 64 k, Mem=5077 K (Time: Fastest mode * 1.1)
FFT Size= 32 k, Mem=3797 K (Time: Fastest mode * 1.3)
FFT Size= 16 k, Mem=3155 K (Time: Fastest mode * 1.7)
FFT Size= 8 k, Mem=2835 K (Time: Fastest mode * 2.7)
FFT Size= 4 k, Mem=2674 K (Time: Fastest mode * 4.7)
...

Enter FFT Size in k :128

Compressed output (also useful to specify output format) ? [0=No, 1=Yes] : 1

Total Physical Memory Allocated = 8155 Kbytes
Computing series with index N=70529
Starting step 5
Starting step 4 ...
Starting step 3 ...
Starting step 2 ...
Starting step 1 ...
Starting step 0 ...
Series computing time : 3.44
Division time : 0.59
InvSqrt time : 0.29
Final huge multiplication time : 0.23
---------------------------------------------------------------
Total computation time : 4.60 seconds(~ 0.00 hours)
Writing informations into file pi.txt

The computation seems OK
Compressing result file ...


C:\Games\pifast>

I saw it on hwbot, but not sure how they ran the test .... Any restriction at all?

[harleybro]

Seems HWbot measures using 10m. I personally came across the batch file which runs it automatically.

Here it is (http://pifast.hexus.net/hexus_pifast.zip)

[boshuter]

Yep...... I was wrong :o seems like hwbot is using the 10M, so just run the batch file.

If you want to run 1M or any other length, use the .exe to start and enter you own choices.

[paulxmn]

Hello,

I submitted on hwbot.org using the Hexus PiFast.



http://pifast.hexus.net/instructions.htm

[ol'norton]

I tried to submit this score, but it http://img215.imageshack.us/img215/5672/2295ir4.th.jpg (http://img215.imageshack.us/my.php?image=2295ir4.jpg)says no image found, and yet you can see the image
Also my score has dropped from 28 to 23. Does it go down everytime someone post a better score?

It says no discription? What should be in there?
Says not in top 1000, but it should be in top 100, a bloke got 8.6 points for the same score? :scratch: :|

[harleybro]

Here's the link to one of my PiFasts. click me (http://www.hwbot.org/result.do?resultId=593466) It shows verification no image found which I am guessing you are reffering to? As for your score dropping yes anytime someone beats one of your scores they will take your pts. and you will drop to the next pt bracket.


Edit. description would be for anything you want to type in. An example could be the type of cooling you use or ram timings. I personally leave mine blank. The top 1000 should update but might take longer. Also anytime you edit results you will have to wait for it to be scanned again. :)

[Just Learnin']

Here's the link to one of my PiFasts. click me It shows verification no image found which I am guessing you are reffering to? As for your score dropping yes anytime someone beats one of your scores they will take your pts. and you will drop to the next pt bracket.

That score is also no good Harley! It is errored out, not a valid run. You actually should delete it.

Also on the hwbot Pifast page it speaks of using version 4.1 for proper comparisons. Is version 4.3 acceptable or not?? :scratch:

HWbot (http://www.hwbot.org/benchmark.application.info.do?applicationId=6)


The latest version available is v4.3, but as results between different versions are not comparable you should keep using hexus pifast, which uses v4.1. Hexus pifast can be downloaded here.

[harleybro]

They do recommend using the hexus PiFast. :scratch: So I will remove that other post in my PiFast thread. Also thanks for pointing that out. :hide: I have removed it never noticed it can give full result and still error checking my others now. Here's one last night with ram at 551 :rock: :rock:
http://i63.photobucket.com/albums/h140/harleybro/yeeehaw.jpg

[Killer Munkey]

i just tried my hand at pifast.

http://www.imagehosting.com/out.php/t456058_firstpifastrun.JPG (http://www.imagehosting.com/out.php/i456058_firstpifastrun.JPG)

[Jim]

Can we submit pifast scores now in the pifast hwbot thread or are we still on hold?

[harleybro]

Can we submit pifast scores now in the pifast hwbot thread or are we still on hold?

Still on hold on this one. Setting up a new bot is alot tricky then I thought. :( So far I have spent a total of about 2 hours just on this one. For some reason everytime I force scan it tries to look for a 3dmark01. :irk:

[Killer Munkey]

I just reran PiFast again, got 45.03 seconds. Is that average for an 2.6ghz Opty?

*edit*
I went and looked it up. Seem to be the 45-50 sec seems to be the norm for A64s