DaemonForums  

Go Back   DaemonForums > Other Operating Systems > Other BSD and UNIX/UNIX-like

Other BSD and UNIX/UNIX-like Any other flavour of BSD or UNIX that does not have a section of its own.

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1   (View Single Post)  
Old 5th April 2009
Graaf_van_Vlaanderen Graaf_van_Vlaanderen is offline
Port Guard
 
Join Date: Apr 2009
Posts: 10
Thanked 0 Times in 0 Posts
Default DragonFly BSD evaluation

I successfully installed DragonFly BSD on a Tyan S2892. There are however several issues:

1. The kernel only sees 3GB of the 4GB of memory. I think this is a typical i86 desease, which also exists in FreeBSD. I guess to solve this a kernel recompile is required...or the AMD64 version if it would be available in DragonFly BSD

2. The DragonFly BSD kernel apparently only sees one core of the total 4 CPU cores available: two dual core Operon 275 CPUs or the CPU load spreading is simply wrong.

Here is a test that proves this, by running a GNU Octave script (see below) that measures the calculation time.
In the first test I just ran one script, the second time the script was run two times at the same time.

Elapsed time for a 100X100 matrix:

Single run in FreeBSD (AMD64): 74s
Single run in DragonFlyBSD: 66s

Two concurrent runs in FreeBSD (AMD64): 74s for each run
Two concurrent runs in DragonFlyBSD: 132s for each run

FreeBSD is doing what you expect, spread the load, while DragonFlyBSD seems to put to different processes in one core.

Any thoughts?

Code:
clear all
runs=3;
% (5)
cumulate = 0; p = 0; vt = 0; vr = 0; vrt = 0; rvt = 0; RV = 0; j = 0; k = 0;
x2 = 0; R = 0; Rxx = 0; Ryy = 0; Rxy = 0; Ryx = 0; Rvmax = 0; f = 0;
for i = 1:runs
  x = abs(randn(100,100));
  tic;
    % Calculation of Escoufier's equivalent vectors
    p = size(x, 2);
    vt = [1:p];                                % Variables to test
    vr = [];                                   % Result: ordered variables
    RV = [1:p];                                % Result: correlations
    for j = 1:p                                % loop on the variable number
      Rvmax = 0;
      for k = 1:(p-j+1)                        % loop on the variables
        if j == 1
          x2 = [x, x(:, vt(k))];
        else
          x2 = [x, x(:, vr), x(:, vt(k))];     % New table to test
        end
        R = corrcoef(x2);                      % Correlations table
        Ryy = R(1:p, 1:p);
        Rxx = R(p+1:p+j, p+1:p+j);
        Rxy = R(p+1:p+j, 1:p);
        Ryx = Rxy';
        rvt = trace(Ryx*Rxy)/((trace(Ryy^2)*trace(Rxx^2))^0.5); % RV calculation
        if rvt > Rvmax
          Rvmax = rvt;                         % test of RV
          vrt(j) = vt(k);                      % temporary held variable
        end
      end
      vr(j) = vrt(j);                          % Result: variable
      RV(j) = Rvmax;                           % Result: correlation
      f = find(vt~=vr(j));                     % identify the held variable
      vt = vt(f);                              % reidentify variables to test
      
    end
  timing = toc;
  cumulate = cumulate + timing;
 
end
times(5, 3) = timing;
disp(['Escoufier''s method on a 100x100 matrix (mixed)________ (sec): ' num2str(timing)])
clear x; clear p; clear vt; clear vr; clear vrt; clear rvt; clear RV; clear j; clear k;
clear x2; clear R; clear Rxx; clear Ryy; clear Rxy; clear Ryx; clear Rvmax; clear f;
Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DragonFly handbook JimC Other BSD and UNIX/UNIX-like 1 28th February 2009 07:25 PM
DragonFly 2.2 iwi support... sorivenul Other BSD and UNIX/UNIX-like 0 19th February 2009 07:17 AM
DragonFly BSD 2.2 released matthias Other BSD and UNIX/UNIX-like 0 18th February 2009 02:37 PM
NTFS on DragonFly BSD Malakim Other BSD and UNIX/UNIX-like 4 17th October 2008 03:43 PM
URL evaluation tools to determine if serving malware dk_netsvil Off-Topic 0 30th June 2008 04:55 PM


All times are GMT. The time now is 06:25 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content copyright © 2007-2010, the authors
Daemon image copyright ©1988, Marshall Kirk McKusick