[Xastir] Xastir 1.9.1 on cygwin_nt-5.1

[Bob Donnell]

Hi Bernard,

I used to be a cygwin user too, but found out that the Vmware solution ran
tremendously faster, especially on any fat internet feed.  

If I recall what Curt told me, cygwin is slow basicly because it uses the
old 18.2 Hz PC interrupt as its key to decide when to check for a packet to
process on the defined interfaces.  As a result, if you're connected to a
feed that delivers a lot of packets, eventually the TCP receive buffer
fills, and the internet server disconnects from the xastir instance, leaving
the interface in an error state, unless and until it recovers, reconnects,
then eventually repeats the process.

On the other hand, running under VMWare gets the job done while apparently
providing a higher interrupt frequency to xastir.  There also seems to be a
lot less overhead associated with the linking phase of building applications
in the virtualized linux environment vs. the cygwin environment.  Also, I
still manage to run all of my Windows work desktop applications from the
Windows desktop, with loss of throughput relating to how busy Vmware Player
and applications running in it are making my system - but a LOT less so than
under cygwin.  Yep, I realize that 256MB of memory makes this a lot less
practical.

73,

Bob,  KD7NM


-----Original Message-----
From: xastir-bounces at xastir.org [mailto:xastir-bounces at xastir.org] On Behalf
Of Bernard Tyers
Sent: Wednesday, August 29, 2007 2:51 AM
To: Curt Mills, WE7U
Cc: xastir at xastir.org
Subject: Re: [Xastir] Xastir 1.9.1 on cygwin_nt-5.1

Hi Curt,

Alex sorted out the problems..

TBH, I don't want to have to install an Ubuntu VMWare machine (which will
probably run like a dog on the mini-itx machine with 256MB its running on).

The other reason is I have to use the windows machine for other radio
software that is not available for Mac/Linux (read 99% of all radio
software).

MS Virtual PC only runs on Intel x86 CPUs (or at least did when I last
looked). The CPUs in these mini-itx machines are EPIA Via chips.

So, I'll stick with cygwin for the moment.

It works perfectly..just configuring it now.

thanks again.

bernard



On 28 Aug 2007, at 19:17, Curt, WE7U wrote:

> On Tue, 28 Aug 2007, Bernard Tyers wrote:
>
>> Has anything changed with regards Xastir on cygwin? I managed to 
>> build Xastir on cygwin a few months ago and it built perfectly.
>
> I don't run on Cygwin so can't answer directly as to whether anything 
> has changed, but most likely it's Cygwin and/or one of the packages 
> that has changed, or else you don't have the ImageMagick library 
> installed, but do have the headers installed.
>
> If you can't get this solved quickly, I'd suggest trying the VMWare 
> Player/Ubuntu install instead.  That way you can avoid Cygwin 
> altogether.  Still a free option:
>
>   <http://www.xastir.org/wiki/index.php/HowTo:VMware>
>
> Another method is to install MS Virtual PC (free) and install Linux 
> inside that, then compile/install Xastir.  If anyone wants to do this, 
> take notes, and write up a Wiki page for it, we'll get that added to 
> the Wiki as well.
>
> --
> Curt, WE7U: <www.eskimo.com/~archer/>     XASTIR: <www.xastir.org>
>   "Lotto:  A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U The world 
> DOES revolve around me:  I picked the coordinate system!

==========
Bernard Tyers
bernard.tyers at gmail.com
EI8FDB



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