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Thread: Super PI Ubuntu - How fast is your cpu?

  1. #901
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    Re: Super PI Ubuntu - How fast is your cpu?

    should have looked first...

    it says near the top of the pi output that its "up to 1048576 decimal digits"

    so, i guess you could enter this:
    code:
    pi 1048576

    and time it yourself with a stopwatch...

  2. #902
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    Re: Super PI Ubuntu - How fast is your cpu?

    sorry for pasting so many times in a row.

    i made a script that does the same thing as super pi (although it doesn't time itself). but, you must have pie installed to run it.
    code:
    sudo apt-get install pi
    install pi, then download the script, and run it. i think it runs faster than super pi, because i got 11.5 seconds on a dual core running at 1.8ghz. you may need to make it executable. there is no need to open a terminal to run it. you can do it graphicly. (double click, select option "run in terminal") at the end it may display a time, but its not the time it took to complete. so, you just need to time it yourself...
    Attached Files Attached Files
    • File Type: txt pi.txt (338 Bytes, 68 views)
    Last edited by mr clark25; December 25th, 2009 at 08:35 PM.

  3. #903
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    Re: Super PI Ubuntu - How fast is your cpu?

    Quote Originally Posted by mr clark25 View Post
    sorry for pasting so many times in a row.

    i made a script that does the same thing as super pi (although it doesn't time itself). but, you must have pie installed to run it.


    install pi, then download the script, and run it. i think it runs faster than super pi, because i got 11.5 seconds on a dual core running at 1.8ghz. you may need to make it executable. there is no need to open a terminal to run it. you can do it graphicly. (double click, select option "run in terminal") at the end it may display a time, but its not the time it took to complete. so, you just need to time it yourself...
    Your script seems to be calling 'pi' more than once. Still, if it is faster than Super Pi, then its results are totally irrelevant to all others in this thread.

    If you really want to use the 'pi' program in the repositories to calculate pi to 2^20 digits and time the process, all you need to run is this command:
    Code:
    time pi 1048576 | egrep '.*total$'
    And for me, running a T7600, this only took about 4 seconds. So I am pretty sure that this program isn't at all comparable to Super Pi.

    The 'time' command is usually accurate to a few milliseconds:
    Code:
    time sleep 1
    sleep 1  0.00s user 0.00s system 0% cpu 1.003 total
    Considering human reaction time, I would guess that using a stop watch is going to be at least 1/3 of a second off, and probably way more for really short periods.
    Last edited by dbbolton; December 25th, 2009 at 10:01 PM.

  4. #904
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    Re: Super PI Ubuntu - How fast is your cpu?

    Quote Originally Posted by dbbolton View Post
    Your script seems to be calling 'pi' more than once. Still, if it is faster than Super Pi, then its results are totally irrelevant to all others in this thread.

    If you really want to use the 'pi' program in the repositories to calculate pi to 2^20 digits and time the process, all you need to run is this command:
    Code:
    time pi 1048576 | egrep '.*total$'
    And for me, running a T7600, this only took about 4 seconds. So I am pretty sure that this program isn't at all comparable to Super Pi.

    The 'time' command is usually accurate to a few milliseconds:
    Code:
    time sleep 1
    sleep 1  0.00s user 0.00s system 0% cpu 1.003 total


    Considering human reaction time, I would guess that using a stop watch is going to be at least 1/3 of a second off, and probably way more for really short periods.
    here is mine, e8400@4ghz i dont know if it uses both cores?

    Code:
    mark@mark-desktop:~/superpi$ time pi 1048576 | egrep '.*total$'
    
    real	0m2.391s
    user	0m2.350s
    sys	0m0.050s
    mark@mark-desktop:~/superpi$
    this is my e5200 @ stock (2.5ghz)
    Code:
    mark@torrentslave:~/scripts$ time pi 1048576 | egrep '.*total$'
    
    real	0m4.227s
    user	0m4.100s
    sys	0m0.120s
    mark@torrentslave:~/scripts$
    time is def accurate ...
    Code:
    mark@mark-desktop:~$ time sleep 1 
    
    real	0m1.001s
    user	0m0.000s
    sys	0m0.000s
    mark@mark-desktop:~$
    Last edited by markp1989; December 25th, 2009 at 10:36 PM.
    Desktop:i7 875k|4gb OCZ platinum ddr3 2000|Evga P55 LE mobo|OCZ RevoDrive 50gb|ATI 5850 Black Edition|Silverstone FT02|corsair tx650
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  5. #905
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    Re: Super PI Ubuntu - How fast is your cpu?

    Quote Originally Posted by markp1989 View Post
    here is mine, e8400@4ghz i dont know if it uses both cores?

    Code:
    mark@mark-desktop:~/superpi$ time pi 1048576 | egrep '.*total$'
    
    real    0m2.391s
    user    0m2.350s
    sys    0m0.050s
    mark@mark-desktop:~/superpi$
    this is my e5200 @ stock (2.5ghz)
    Code:
    mark@torrentslave:~/scripts$ time pi 1048576 | egrep '.*total$'
    
    real    0m4.227s
    user    0m4.100s
    sys    0m0.120s
    mark@torrentslave:~/scripts$
    time is def accurate ...
    Code:
    mark@mark-desktop:~$ time sleep 1 
    
    real    0m1.001s
    user    0m0.000s
    sys    0m0.000s
    mark@mark-desktop:~$
    If you are using bash, there is no need to grep for 'total' because bash will print it as 'real'. Of course it does suppress the number output of pi.

    Then again, 'time' is pretty greedy. It will time whatever comes after it, including the pipe.
    Last edited by dbbolton; December 26th, 2009 at 01:01 AM.

  6. #906
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    Re: Super PI Ubuntu - How fast is your cpu?

    i7 950 @ 4ghz

    ------ Started super_pi run : Sun Jan 17 00:01:53 CST 2010
    Start of PI calculation up to 1048576 decimal digits
    End of initialization. Time= 0.128 Sec.
    I= 1 L= 0 Time= 0.300 Sec.
    I= 2 L= 0 Time= 0.336 Sec.
    I= 3 L= 1 Time= 0.252 Sec.
    I= 4 L= 2 Time= 0.268 Sec.
    I= 5 L= 5 Time= 0.244 Sec.
    I= 6 L= 10 Time= 0.240 Sec.
    I= 7 L= 21 Time= 0.260 Sec.
    I= 8 L= 43 Time= 0.264 Sec.
    I= 9 L= 87 Time= 0.264 Sec.
    I=10 L= 174 Time= 0.272 Sec.
    I=11 L= 349 Time= 0.256 Sec.
    I=12 L= 698 Time= 0.260 Sec.
    I=13 L= 1396 Time= 0.272 Sec.
    I=14 L= 2794 Time= 0.244 Sec.
    I=15 L= 5588 Time= 0.268 Sec.
    I=16 L= 11176 Time= 0.244 Sec.
    I=17 L= 22353 Time= 0.248 Sec.
    I=18 L= 44707 Time= 0.236 Sec.
    I=19 L= 89415 Time= 0.256 Sec.
    End of main loop
    End of calculation. Time= 5.320 Sec.
    End of data output. Time= 0.048 Sec.
    Total calculation(I/O) time= 5.368( 0.224) Sec.
    ------ Ended super_pi run : Sun Jan 17 00:02:03 CST 2010

  7. #907
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    Re: Super PI Ubuntu - How fast is your cpu?

    Quote Originally Posted by powel212 View Post
    i7 950 @ 4ghz

    ------ Started super_pi run : Sun Jan 17 00:01:53 CST 2010
    Start of PI calculation up to 1048576 decimal digits
    End of initialization. Time= 0.128 Sec.
    I= 1 L= 0 Time= 0.300 Sec.
    I= 2 L= 0 Time= 0.336 Sec.
    I= 3 L= 1 Time= 0.252 Sec.
    I= 4 L= 2 Time= 0.268 Sec.
    I= 5 L= 5 Time= 0.244 Sec.
    I= 6 L= 10 Time= 0.240 Sec.
    I= 7 L= 21 Time= 0.260 Sec.
    I= 8 L= 43 Time= 0.264 Sec.
    I= 9 L= 87 Time= 0.264 Sec.
    I=10 L= 174 Time= 0.272 Sec.
    I=11 L= 349 Time= 0.256 Sec.
    I=12 L= 698 Time= 0.260 Sec.
    I=13 L= 1396 Time= 0.272 Sec.
    I=14 L= 2794 Time= 0.244 Sec.
    I=15 L= 5588 Time= 0.268 Sec.
    I=16 L= 11176 Time= 0.244 Sec.
    I=17 L= 22353 Time= 0.248 Sec.
    I=18 L= 44707 Time= 0.236 Sec.
    I=19 L= 89415 Time= 0.256 Sec.
    End of main loop
    End of calculation. Time= 5.320 Sec.
    End of data output. Time= 0.048 Sec.
    Total calculation(I/O) time= 5.368( 0.224) Sec.
    ------ Ended super_pi run : Sun Jan 17 00:02:03 CST 2010
    Strange, you're showing a 5.368 second run but it took 10 seconds.
    |~Comfortably Numb~|

  8. #908
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    Re: Super PI Ubuntu - How fast is your cpu?

    Strange, you're showing a 5.368 second run but it took 10 seconds.
    http://www.youtube.com/watch?v=Qcagk5mzoyA

    I just ran it. I didn't try to do anything funny with it. Just wanted to demonstrate what is going on with my i7.

    This is Jaunty running on my mac in a Vbox guest. I gave Jaunty 4 processors and 2 gigs of ram.

    No funny business. Check the attached screencast.

    Powel

  9. #909
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    Re: Super PI Ubuntu - How fast is your cpu?

    Quote Originally Posted by powel212 View Post
    http://www.youtube.com/watch?v=Qcagk5mzoyA

    I just ran it. I didn't try to do anything funny with it. Just wanted to demonstrate what is going on with my i7.

    This is Jaunty running on my mac in a Vbox guest. I gave Jaunty 4 processors and 2 gigs of ram.

    No funny business. Check the attached screencast.

    Powel
    My apologies if my post seemed accusatory; I was just making conversation and it was not meant that way. I was only curious about the difference between the score and test time because your score is so much higher than any I can remember seeing for a 4Ghz Bloomfield.
    Congrats and kudos, my friend, and, once again, my apologies. =)
    Last edited by drphilngood; January 17th, 2010 at 04:59 AM. Reason: grammar
    |~Comfortably Numb~|

  10. #910
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    Re: Super PI Ubuntu - How fast is your cpu?

    My apologies if my post seemed accusatory
    No worries. I actually didn't notice the difference in the number total until you mentioned it. It is a bit odd.

    I can tell you this though. If you are wondering about switching to i7. I can tell you, I love it. The one drawback though is I can no longer use anyone else's computer. Can't deal with the lag.

    If you are happy with what you've got enjoy it but i7 is definitely worth it.

    P.

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