[daip] problems running multiple tv displays on different desktops

[Wes Young]

Susan,

In short yes, you will need to increase the amount shared memory allocation. I would guess you would need to double everything but kern.sysv.shmmin. It may be that you can get by with doubling kern.sysv.shmmax but I'm not sure.

wes
wyoung at aoc.nrao.edu


On Feb 7, 2012, at 8:22 AM, Susan Neff wrote:

> Hi Eric and/or Amy,
> 
> 
> I have a new wrinkle.  AIPS is working fine on my 
> MacPro (Mac Os X, version 10.6.8 = SnowLeopard), as 
> long as I stay on one "desktop".  Today I tried to 
> start AIPS in a second desktop, when I already had it 
> running (in two windows & 1 TV on) a first desktop.  I 
> used the command
> 
> aips  tv=local:2
> 
> to start AIPS in a window on the second desktop.  AIPS 
> started up okay, and created a second message window 
> and second tek  window.  It tried but was not 
> successful in creating a second TV, and said the 
> following (about the tv - I didn't copy all of what it 
> said):
> 
> 
> START_AIPS: Will use Unix Socket based TV number 2
> 
> START_AIPS: Starting TV servers on localhost 
> asynchronously
> START_AIPS:  - With Unix Sockets as requested...
> 
> Begin the one true AIPS number 3 (release of 31dec12) 
> at priority = 0
> AIPS3:  You are not on a local TV device, welcome stranger
> AIPS3:  You are assigned TV device/server 3
> 
> AIPS 3: Enter user ID number  [I did]
> 
> ?UNIXSERVERS: Start TV LOCK daemon TVSRV2 on localhost
> Trying to make hard link in 
> /Users/neff/aips/31DEC12/MACINT/LOAD to TVSERV.EXE
> TVSERVER: Starting AIPS TV locking, Unix (local) domain
> UNIXSERVERS: Start XAS2 on localhost, DISPLAY 
> /tmp/launch-NyfcxI/org.x:0
> Trying to make hard link XAS2 to XAS ...
> 
> XAS:  **TrueColor FOUND!!!
> XAS:  ***Using shared memory option for speed ***
> XAS:  Using screen width 1910 height 1078
>          max grey level 8191 in 16 grey-scale memories
> Shared memory id failure: Cannot allocate memory
> 
> 
> I tried just starting another aips window, without 
> specifying a TV, and it starts up a window that works 
> fine with the existing TV (on a different desktop).
> 
> So, there is some good discussion in the AIPS manager 
> FAQ for what to do with this error (shared memory id 
> failure) if it's in the initial session of AIPS.  
> However, the TV is working fine in the initial 
> session, and so I don't *think* I need to change the 
> things discussed in the FAQ.   However, I don't really 
> understand how shared memory works - do I need to 
> double/triple/...   the shared memory value for 
> kern.sys.shmmax  in /etc/sysctl.conf   if I want to 
> use two/three/...  TV displays at the same time?   Is 
> there something else I should change?   I'm running 
> with a 23 inch display, 1920 x 1200 pixels.
> 
> 
> Thanks very much,
> Susan
> 
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