Re: [Pharo-users] Recommended VM on Raspberry Pi ?

[Sven Van Caekenberghe]

Here is what I did (on a fresh Raspberry Pi 2 B)

$ uname -a
Linux raspberrypi 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 
armv7l GNU/Linux

$ curl get.pharo.org/50 | bash
$ wget http://files.pharo.org/sources/PharoV40.sources.zip
$ wget http://files.pharo.org/vm/pharoS/raspbian/latest.zip

Both the PharoS and squeak VM that comes with Raspbian 7 fail (not Spur 
compatible):

$ squeak -nodisplay Pharo.image printVersion
found gettext in path
/home/pi/Pharo
This interpreter (vers. 0) cannot read image file (vers. 6521).
Press CR to quit...
pi@raspberrypi ~/Pharo $ ./pharosvm/PharoS -nodisplay Pharo.image printVersion
unknown option: -nodisplay

$ ./pharosvm/PharoS --nodisplay Pharo.image printVersion
This interpreter (vers. 6505) cannot read image file (vers. 6521).
Press CR to quit...

The Cog VM does work:

$ ./cogspurlinuxhtARM/lib/squeak/5.0-3427/squeak -nodisplay Pharo.image 
printVersion
[version] 5.0 #50581

It is way faster than PharoS on an older B+. 

But it does have an annoying slowdown in shutting down: it starts up OK, 
executes its eval expression immediately, but then seems to wait a couple of 
seconds before shutting down:

pi@raspberrypi ~/Pharo $ echo `date`; time 
./cogspurlinuxhtARM/lib/squeak/5.0-3427/squeak -nodisplay Pharo.image eval 
'DateAndTime now'; echo `date`
Sat Feb 13 15:45:44 UTC 2016
2016-02-13T15:45:44.860574+00:00

real0m7.415s
user0m7.210s
sys 0m0.250s
Sat Feb 13 15:45:51 UTC 2016

This takes 7 seconds, while the DateAndTime now is printed just .86 seconds 
after starting.

Running an HTTP server worked fine. I will try to get my actual app running and 
then test OS(Sub)Process.

Sven

PS: it is a bit odd that the latest Cog VM was published in August, nothing new 
since then.

> On 13 Feb 2016, at 09:46, Clément Bera  wrote:
> 
> Hello Sven,
> 
> You can use the VM with the JIT on the Pie now (Spur Cog VM). It is deployed 
> by default on the recent raspberry pis and has millions of users for Squeak 
> and Scratch since August 2015 (the raspberry pie fondation paid Tim for the 
> ARM JIT on the Cog because of the size of their user base).
> 
> As far as I know there is no way to build it in the Pharo VM branch. Just 
> pick a version compiled from the trunk, that should work fine with the latest 
> Pharo 5 (note that it requires a Spur image, so it needs one of the latest 
> Pharo 5). Here is where you can get it:
> http://www.mirandabanda.org/files/Cog/VM/VM.r3427/cogspurlinuxhtARM-15.33.3427.tgz
>  
> 
> Now even with performance improvement of the VM, some people reported that 
> the UI of the Pharo image is too slow to be usable on the raspberry pi 1 
> (Nautilus takes *many* seconds to open for example, same for GT tools). Try 
> and report your experience.
> 
> On many benchs, the JIT VM for the pie has been reported on average 3 to 5x 
> faster than the Stack VM. Note that the new FFI, even if it reuses the VM FFI 
> backend, is dependent on x86, hence you need to use the old FFI syntax to 
> have it working on the raspberry pie (there is some code to load in the image 
> to do so). 
> 
> Have fun and report your experience with the raspberry pi and Pharo please,
> 
> Clement
> 
> 
> 2016-02-12 23:05 GMT+01:00 Sven Van Caekenberghe :
> Hi,
> 
> I have been using the PharoS VM for a Pharo 4 based app on Raspberry Pi 
> (Rasbian).
> 
> This VM is quite slow.
> 
> Now that Pharo 5 is Spur based, what is the recommended VM on that platform ?
> 
> I was hoping to use a faster VM, if that is available.
> 
> Is anyone having some concrete experience in this area ?
> 
> Thx,
> 
> Sven
> 
> 
> 
> 

Re: [Pharo-users] Recommended VM on Raspberry Pi ?

[Clément Bera]

Hello Sven,

You can use the VM with the JIT on the Pie now (Spur Cog VM). It is
deployed by default on the recent raspberry pis and has millions of users
for Squeak and Scratch since August 2015 (the raspberry pie fondation paid
Tim for the ARM JIT on the Cog because of the size of their user base).

As far as I know there is no way to build it in the Pharo VM branch. Just
pick a version compiled from the trunk, that should work fine with the
latest Pharo 5 (note that it requires a Spur image, so it needs one of the
latest Pharo 5). Here is where you can get it:
http://www.mirandabanda.org/files/Cog/VM/VM.r3427/cogspurlinuxhtARM-15.33.3427.tgz


Now even with performance improvement of the VM, some people reported that
the UI of the Pharo image is too slow to be usable on the raspberry pi 1
(Nautilus takes *many* seconds to open for example, same for GT tools). Try
and report your experience.

On many benchs, the JIT VM for the pie has been reported on average 3 to 5x
faster than the Stack VM. Note that the new FFI, even if it reuses the VM
FFI backend, is dependent on x86, hence you need to use the old FFI syntax
to have it working on the raspberry pie (there is some code to load in the
image to do so).

Have fun and report your experience with the raspberry pi and Pharo please,

Clement


2016-02-12 23:05 GMT+01:00 Sven Van Caekenberghe :

> Hi,
>
> I have been using the PharoS VM for a Pharo 4 based app on Raspberry Pi
> (Rasbian).
>
> This VM is quite slow.
>
> Now that Pharo 5 is Spur based, what is the recommended VM on that
> platform ?
>
> I was hoping to use a faster VM, if that is available.
>
> Is anyone having some concrete experience in this area ?
>
> Thx,
>
> Sven
>
>
>