Two-Parallella Cluster using eLink and Procupine

Re: Two-Parallella Cluster using eLink and Procupine

Postby nncarlson » Sat Dec 30, 2017 12:20 am

Very valuable write up. Thanks!
You've been thinking toward a 64-core cluster. What would the e-link cabling look like to connect the 16-core epiphany's in a 2x2 grid? The north/south e-link sockets on the porcupine (and no east/west) has me confused.
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Re: Two-Parallella Cluster using eLink and Procupine

Postby claudio4parallella » Mon Sep 10, 2018 8:56 pm

Hi,

yes, back to my CLUSTER of 4 PARALLELLA project at my new Academic year of Courses.
Now my CLUSTER has 64 cores.
The test picture is the following: the points of each sin(alpha) line has been drawn by a single core for a total of 64 flows.

Now I absolutely need to exit my unsolved troubleshooting:

The current conditions:
- The cluster does work only with the OLD IIMG: ubuntu-14.04-headless-z7010-20150130.1.img which includes esdk.2015.1. No way to work with the last updated IMG.
- The ubuntu-14.04-headless-z7010-20150130.1.img is without HDMI, so no video output is allowed. Even if without HDMI, no FRAMEBUFFER is installed even if I installed LXDE and X11.

Needs:
- I need the FRAMEWORK in order to output the result of the drawing coming by the 64 cores CLUSTER. Using framebuffer-vncserver I can remotely show the PNG coming from the CLUSTER, even if without an HDMI interface.

QUESTION AND REQUEST FOR HELP
- I need to install / activate the FRAMEBUFFER /dev/fb0 in order to map my graph on a screen over the old IMG ubuntu-14.04-headless-z7010-20150130.1.img which is headless.

ATTEMPTS:
- I tried to install LXDE and it's ok in order to have a GUI desktop from the MASTER PARALLELLA, but it doesn't use any FRAMEBUFFER;
- I tried to run lxdsession using Quartz ssh -X but there is no output, so impossible to run;
- I tried to install XORG but no framebuffer at all, it doesn't work.
- I abandoned the attempt to adapt the last UBUNTU Image which has the HDMI and the Frambuffer to the CLUSTER configuration, but no way to apply the Cluster settings .

QUESTION:
Please has anybody the way to add video FRAMEBUFFER to the Headless UBUNT old img?
May be something should be changed within the kernel?

Thanks a lot.
Attachments
png.png
64 graph, one per core
png.png (41.03 KiB) Viewed 2029 times
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Re: Two-Parallella Cluster using eLink and Procupine

Postby claudio4parallella » Mon Sep 10, 2018 9:03 pm

nncarlson wrote:Very valuable write up. Thanks!
You've been thinking toward a 64-core cluster. What would the e-link cabling look like to connect the 16-core epiphany's in a 2x2 grid? The north/south e-link sockets on the porcupine (and no east/west) has me confused.


Yes, one PARALLELLA NORTH e-Link to the closest PARALLELLA SOUTH e-Link, the ring is open for adding boards.....
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