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Posts by captainjack

21) Message boards : News : New Version of Separation Modified Fit (1.32) (Message 62303)
Posted 9 Sep 2014 by captainjack
Post:
DJStarfox,

N-Body seems to be running fine on my Linux box.

Since you have your computers hidden, I can't see how they are configured. What version of Linux are you using? Is it a 64-bit version? If it is 64-bit, did you install the 32-bit compatibility libraries?

Have you ever been able to run N-Body and Modified Fit tasks successfully?
22) Message boards : Number crunching : Milkyway@Home 1.02 (opencl_AMD_ati) all erroring out (Message 62255)
Posted 4 Sep 2014 by captainjack
Post:
I am running a 6950 with Catalyst 13.1 drivers and both types of work units are working fine. I can't remember exactly what it was but there is something quirky about the 6950 and it required the older drivers.

Hope that helps.
23) Message boards : Number crunching : Upgraded from Ubuntu 12.04 LTS to Ubuntu 14.04 LTS no new Projects (Message 62080)
Posted 25 Jul 2014 by captainjack
Post:
Something must have been corrupted in your GPU crunching configuration during the upgrade. I am running Ubuntu 14.04 with a GTX 660ti and a GTX 770. It is crunching Milkyway, GPUGRID and POEM GPU tasks just fine. The difference may be that my installation is a fresh install.

You might try to uninstall and reinstall all of your BOINC and GPU software. If that does not get you going, you may need to do a fresh install of Ubuntu 14.04.

Hope that helps.
24) Message boards : Number crunching : Who is crunshing on a Radeon HD 6950 and could tell ? (Message 61975)
Posted 30 Jun 2014 by captainjack
Post:
Some people have had challenges using current drivers on an HD 6950 card. I am currently using Catalyst 13.1 and they are working fine.

A Milkyway@Home separation (modified fit) takes ~137 seconds.

A Milkeway@Home V1.02 takes ~75 seconds.

Hope that helps.
25) Message boards : News : New N-Body Runs (Message 61853)
Posted 8 Jun 2014 by captainjack
Post:
Hi dlk,

Yes, there are some N-Body tasks that are multi-thread meaning they will use all of the threads that are available. In BOINC Manager, the application name is "Milkyway@Home N-Body Simulation 1.40 (mt)". If you want to restrict the number of threads they use, here is a post by Jacob Klein on using an app_config.xml to control the number of CPU's that an n-body will use. It is what I use.

http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=3359&postid=60956

Hope that helps.
26) Message boards : Application Code Discussion : 4 core units stop GPU (Message 61828)
Posted 2 Jun 2014 by captainjack
Post:
Stephen,

Here is a post by Jacob Klein on using an app_config.xml to control the number of CPU's that an n-body will use. It is what I use.

http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=3359&postid=60956

Hope that helps.
27) Message boards : News : N-Body 1.38 (Message 60963)
Posted 4 Feb 2014 by captainjack
Post:
Cool!

Jacob, Thanks for working with the BOINC team to get the additional parameters included in the app_config file. And thanks for posting the new parameters in the thread.

I have it working now on one machine running Windows 7 and on one machine running Ubuntu.

28) Message boards : Number crunching : All Milkyway@Home 1.02 tasks ending in computation error on HD6950. (Message 60850)
Posted 28 Jan 2014 by captainjack
Post:
Happily crunching away with an HD 6950, Catalyst 13.1 and Windows 7 Ultimate since June of 2013. Everything is running stock clocks.

I will have to say that when I started trying to run Milkyway tasks, I had Catalyst 13.4 drivers installed, and started getting errors. The wisdom at the time was to run Catalyst 13.1 drivers. When I tried to go back to Catalyst 13.1, the machine got so mangled up that I had to reformat the hard drive, reinstall Windows 7 then install the Catalyst 13.1 drivers. Haven't touched it since then except to install Windows patches.
29) Message boards : Number crunching : All ps_separation tasks are getting computation errors (Message 60741)
Posted 15 Jan 2014 by captainjack
Post:
Set the "MilkyWay@Home" tasks to "No".
Leave the "MilkyWay@Home Separation (Modified Fit)" tasks set to "Yes".
30) Message boards : Number crunching : All ps_separation tasks are getting computation errors (Message 60736)
Posted 13 Jan 2014 by captainjack
Post:
Michael, did you by chance update your gpu drivers at the same time you installed BOINC 7.2.33 and virtualbox?
31) Message boards : Number crunching : All ps_separation tasks are getting computation errors (Message 60724)
Posted 11 Jan 2014 by captainjack
Post:
If you want to try 7.2.37, here's a link where you can get it.

http://boinc.berkeley.edu/download_all.php

I would be tempted to uninstall everything then start with a fresh copy of BOINC.

Let us know how it works out.
32) Message boards : Number crunching : All ps_separation tasks are getting computation errors (Message 60722)
Posted 11 Jan 2014 by captainjack
Post:
Michael,

I'm running Windows 7 x64, VirtualBox 4.3.6, and AMD 6950 GPGPU with Catalyst 13.1 drivers. First I'm curious why Test4Theory didn't work, it has been running fine for me. How did you install BOINC? I've read that sometimes installing BOINC as a service can cause problems.

How did you install Virtualbox? Did you use the BOINC/virtualbox installer? Or did you get Virtualbox from the Virtualbox download site?

I've also read that BOINC 7.2.33 is problematic. IIRC, a post on another project said that a person had problems adding a new project under 7.2.33. Some posts on other boards recommend installing a different version of BOINC, either the newer 7.2.37 or an older version that is known to be good.

Earlier I was running BOINC 7.2.33 with Test4Theory, WCG and Milkyway Separation (Modified Fit) jobs. It was all working fine. I just upgraded to BOINC 7.2.37 and added Milkyway@home (ps_separation) jobs to the mix and it seems to be working okay.

Let us know if you need more help. And if you want to get Test4theory working, you should post a message on that board. It is sometimes tricky to get set up, but will work once set up properly.
33) Message boards : Number crunching : CPU not fully loaded (Message 60683)
Posted 4 Jan 2014 by captainjack
Post:
Hi Bruce,

I've seen this kind of behavior before on the n-body (mt) (multi-thread) WU's. They reserve all available threads but only use 70-80% of available resources, even if you select 100% of CPU's and 100% of CPU time. It happened to me all the time on my 16 thread computer.

Hope that helps.
34) Message boards : Number crunching : Linux Has Massively Superior AMD OpenCL Performance to Windows (Message 60160)
Posted 17 Oct 2013 by captainjack
Post:
For anyone trying to get AMD drivers to work in Boinc when using Linux, here is one possible solution.

I was told that the Boinc deamon starts before the AMD drivers are initialized. So, when Boinc checks for the GPU, it is not there. However, if the Boinc deamon is restarted after the AMD drivers are initialized, boinc will find the GPU.


Another option is to put a delay of 6 seconds in the BOINC startup script. That will give the GPU drivers time to load before BOINC starts up and looks for them.

Edit /etc/init.d/boinc-client and insert "sleep 6" at the following location


start()
{
 log_begin_msg "Starting $DESC: $NAME"
 if is_running; then
 log_progress_msg "already running"
 else
 if [ -n "$DISPLAY" -a -x /usr/bin/xhost ]; then
 # grant the boinc client to perform GPU computing
 xhost local:boinc || echo -n "xhost error ignored, GPU computing may not be possible"
 fi
sleep 6 
 if [ -n "$VALGRIND_OPTIONS" ]; then
 start-stop-daemon --start --quiet --background --pidfile $PIDFILE \
 --make-pidfile --user $BOINC_USER --chuid $BOINC_USER \
 --chdir $BOINC_DIR --exec /usr/bin/valgrind -- $VALGRIND_OPTIONS $BOINC_CLIENT $BOINC_OPTS
 else
 start-stop-daemon --start --quiet --background --pidfile $PIDFILE \
 --make-pidfile --user $BOINC_USER --chuid $BOINC_USER \
 --chdir $BOINC_DIR --exec $BOINC_CLIENT -- $BOINC_OPTS
 fi



Save the file
Reboot

Check and see if BOINC recognizes the GPU.

Hope that helps.
35) Message boards : News : Users Auto-Aborting Work Units (Message 60113)
Posted 5 Oct 2013 by captainjack
Post:
Hey Mikey,

Boinc still has lots of options that could be implemented to make it better, but have not been yet..ie why do I have to sign up for a project, on a new or old pc, and ALWAYS use the default settings? WHY can't the initial setup include the default, home, work and school settings in it? IOW why do I have to sign up for a project, then immediately abort every unit I get as it is NOT the kind of unit I want? I DO have the kinds of units I want in my home, work or school settings, not ALL pc's are the same you know, but I CANNOT get to them until AFTER I have signed up and got some of the default units!!! And PLEASE do not tell me to change the default settings to this or that, as it could be wrong no matter what the settings are!! For instance I have 15 pc's crunching or Boinc right now, there is no way each and every one is the same or has the same needs, yesterday I ran out of cpu units at one of my favorite projects and wanted to get them from another project, so I signed up for the other project but of course the default settings for it are for GPU units. So what I did was get a stack of gpu units and immediately abort them, changing the settings on the website to the home group, then updating the pc and finally getting cpu units instead!! What a pain for me AND the project and TOTALLY unnecessary!!!


If I understand this correctly, you want to be able to connect a pc to a project and use something other than the default settings. Correct?

Before you attach the pc to the project,
> Open the project web site
> Open the "Your Account" page
> Under "Preferences", open "Preferences for this project". On the Milkyway page the clickable link says "MilkyWay@Home preferences".
> Under the "Primary (default) preferences" is an option for "Default computer location". Click on the link to update the default preferences.
> Change the "Default computer location" to home, school or work.
> Click on "Update Preferences".

Now when you attach a pc to a project the first time, the pc will automatically get the settings for home, school or work depending on what you chose in the preferences.

Does that help? Or am I completely off base here?
36) Message boards : Number crunching : GPU lacks the necessary double precision extension (Message 59570)
Posted 11 Aug 2013 by captainjack
Post:
Hey Robin,


Thanks for that Capn. Most interesting. Particularly as your "BigUnit" is about x1,000 quicker than mine! Makes my contribution seem somewhat insignificant!


Every little bit helps and I'm sure that the scientist appreciate all the help they can get.

BTW, the computer is named after a major league baseball pitcher named Randy Johnson. He was 6 feet 10 inches tall and his nickname was the Big Unit. He was a rather imposing figure on the pitchers mound and he could throw a fastball like no other.

By the way, is your surname Sparrow or Harkness?


HAHAHAHAHA, it took me a while to figure this one out. Actually, I earned the nickname of Captain Jack several decades before Captain Jack Sparrow hit the silver screen. I got it during the days that I was doing a lot of boating and bass fishing. Ah the good old days.

Keep on crunchin'
Captain Jack
37) Message boards : Number crunching : GPU lacks the necessary double precision extension (Message 59540)
Posted 7 Aug 2013 by captainjack
Post:
Robin,

It may just be letting you know that GPU tasks are available for download but they will not run on your GPU.

If you want to know specifically, please post the message that you are getting.

BTW, if you want to see some examples of the GPU job names I have described,
> In the author column of the posts is my user-id "captainjack" in blue text. It is a clickable link, click on it.
> At the bottom of the top left box is a title for "Computers" with a blue clickable link for "view". Click on "view".
> There are two computers shown, one is named BigUnit. In the column titled "Computer ID" for the BigUnit, there is a blue clickable link for "Tasks". Click on Tasks. It should bring up a page with recent tasks. In the far right column are the "Application" names that I was trying to describe.

Hope that helps.
38) Message boards : Number crunching : GPU lacks the necessary double precision extension (Message 59530)
Posted 6 Aug 2013 by captainjack
Post:
Robin,

When I look at the jobs that you have completed, it looks like they are all CPU jobs. When running a GPU job, BOINC Manager/Tasks tab/Status column should say something like "Running(1 CPU + 1 ATI GPU)".

If you go to the Milky Way web site, click on "Your Account", then click on "Tasks | View", you can see all the tasks that have processed on your computer within the past week or so. If a task ran on the GPU, the name of the task in the "Application" column will have "(opencl_amd_ati)" appended to the end of the task name.

Hope that helps,
CaptainJack
39) Message boards : Number crunching : AMD GPU Computation errors (Message 59492)
Posted 31 Jul 2013 by captainjack
Post:
Try installing Catalyst 13.1 drivers. That is what I had to do on a W7 Ultimate with a 6950 to get it to work for this project.

Hope that helps.
40) Message boards : Number crunching : Please assist - can't get Radeon HD 4850 recognized in Linux (Message 59364)
Posted 15 Jul 2013 by captainjack
Post:
Depending on how you loaded the GPU drivers, you may also need to install the SDK (software developer kit) which includes OpenCL support. Here's a link:

http://developer.amd.com/tools-and-sdks/heterogeneous-computing/amd-accelerated-parallel-processing-app-sdk/downloads/


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