Interfaces that talk across multiple computers, how?

[mister_electronico]

my test.

Open demo_2pwr.sh 2 seconds.

press key responds almost immediately.

maybe using the nice command improve it.

Is too late here I must go to the bed .

make mistake with one computer in my work, the computer I test it is:

See you tomorrow.

[starhawk]

Ah. Mine is quite wimpy in comparison.

[01micko]

starhawk,

With the latest demo_2pwr.sh edit lines 38 and 39 and change to tim=1

From cli run:

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 ./demo_2pwr.sh  tm

or

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./demo_2pwr.sh  hm

Open a new terminal and run:

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top -p `pidof demo_2pwr.sh`

That will tell you roughly the cpu and memory usage of the program.

Realistically, gtkdiaolog is too slow to go below a 1 s time refresh interval. I have tried 0.5 and it barely works on a smaller program, so for stability 1 s is the limitation here.

Caching the gui has brought down the cpu usage dramatically so I don't see why it wont run ok on a PIII (which is what via cpu's are more or less equivalent to).

[starhawk]

top keeps throwing invalid option errors

[01micko]

Try this

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pidof demo_2pwr.sh

A number should be output that is the process ID (PID) of the program.

run:

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top -p 1234

obviously with the number from the first command.

If pidof fails, try busybox pidof instead.

[starhawk]

*sigh*

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# pidof demo_2pwr.sh
9454
# top -p 9454
top: invalid option -- 'p'
BusyBox v1.19.3 (2011-11-09 07:34:50 WST) multi-call binary.

Usage: top [-b] [-nCOUNT] [-dSECONDS] [-m]

Provide a view of process activity in real time.
Read the status of all processes from /proc each SECONDS
and display a screenful of them.
Keys:
	N/M/P/T: show CPU usage, sort by pid/mem/cpu/time
	S: show memory
	R: reverse sort
	H: toggle threads, 1: toggle SMP
	Q,^C: exit

Options:
	-b	Batch mode
	-n N	Exit after N iterations
	-d N	Delay between updates
	-m	Same as 's' key

# top 9454
top: invalid option -- '9'
BusyBox v1.19.3 (2011-11-09 07:34:50 WST) multi-call binary.

Usage: top [-b] [-nCOUNT] [-dSECONDS] [-m]

Provide a view of process activity in real time.
Read the status of all processes from /proc each SECONDS
and display a screenful of them.
Keys:
	N/M/P/T: show CPU usage, sort by pid/mem/cpu/time
	S: show memory
	R: reverse sort
	H: toggle threads, 1: toggle SMP
	Q,^C: exit

Options:
	-b	Batch mode
	-n N	Exit after N iterations
	-d N	Delay between updates
	-m	Same as 's' key

#

[01micko]

sorry about that, I'm using real 'top'. Have you got htop? Try the previous command with that instead.

[starhawk]

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# htop
bash: htop: command not found
# 

[01micko]

.. you are just plain outa luck!

...or are you?

Save this as "pm_top" (pm="poor man's)

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#!/bin/sh

# pm_top
# a poor man's top

v=0.1

args=$#

usage() {
	echo "${0##*/}-$v"
	echo
	echo -e "\t${0##*/} [array of programs]\n"
	echo "eg:"
	echo -e "\t${0##*/} foo bar baz\n"
	echo ".. assuming foo, bar and baz are processes on your system."
	echo "quit with CTRL+C"
	exit
}
clear
#echo "$args args"

[ -z "$1" ] && usage

while [ 1 ];do
	z=1
	d=1
	for i in "$@";do
		pid=$(pidof $i)
		if [ -z "$pid" ];then
			echo "$i not running"
			[ $args = $d ] && echo "exiting" && exit #everything is empty
			d=$(($d + 1))
			continue
		else
			args=$((args + 1))
			pid=${pid%% *}
			echo -en "$i\tpid: $pid"
			echo
			ps -p $pid -o %cpu,%mem,cmd 2>/dev/null
			z=$(($z + 1))
		fi	
	done
	sleep 2
	clear
done

It will work best if you call it with demo_2pwr.sh and gtkdialog (as long as no other gtkdialog process is running)

eg:

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./pm_top gtkdialog demo_2pwr.sh

This actually overcomes a limitation of top, htop as we can show just those 2 processes at once, since they are all we are interested in.

EDITED0: to show PID
EDITED1: to ignore non-running processes

[starhawk]

Having a lot of fun here it just prints a boatload of blank lines and nothing ever starts.

[01micko]

well if ps is the busybox version then there is a bad bug in your puppy

What version?

BTW, edited script to show PID.

Here's how to tell:

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which ps-FULL

[starhawk]

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# which ps-FULL
/bin/ps-FULL
#

[01micko]

Ok, so it will work. Perhaps I didn't explain that demo_2pwr.sh must be running.

[starhawk]

Aha, now it works!

[maxwellsmart]The ol' PEBCAK error trick, second time I've seen it this week![/maxwellsmart]

(If you don't get the reference... watch "Get Smart" )

[01micko]

... and .. loving it!


Edited a second time to ignore mistakes/non-running-progs on the cli. If all of them are non running, the prog just dies peacefully.

[mister_electronico]

The question is there any way to make the process faster than the timer gtkdialog program.

01micko said

Try this

pidof demo_2pwr.sh

run:

top -p 1234

Does this make the program go faster?
or only to appear at the top of htop.

If I do:

ps al

I see that all programs have the same priority maximum 20 PRI as you can see in the picture below.

What is burning my head is how do that gtkdialog refresh the pictures SVG faster.

It occurred to me this script to calculate the time it takes to open the gtkdialog demo_2pwr.sh program not very accurate

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#!/bin/sh
date
./demo_2pwr.sh &
while !( ps aux | grep -v 'grep' | grep -q 'gtkdialog'); do date ; done

time = first date - last date

[starhawk]

mister_e, the 'faster' question was due to a misunderstanding on my part. It's been addressed

[mister_electronico]

In this program so far no problem because only one or two images cools SVG, but when you have to refresh multiple images SVG problems begin.

Try this test program will not finish the up button - down and RST.


it have to refresh a number of images each time:

4 displays x 7-segment + 4 points = 32 SVG images.

This makes the program slow gtkdialog

I can make all the big part of the program in C, would gain in speed but still refresh process images would be slow.

[01micko]

In this program so far no problem because only one or two images cools SVG, but when you have to refresh multiple images SVG problems begin.

Try this test program will not finish the up button - down and RST.


it have to refresh a number of images each time:

4 displays x 7-segment + 4 points = 32 SVG images.

This makes the program slow gtkdialog

I can make all the big part of the program in C, would gain in speed but still refresh process images would be slow.

Yes I am afraid that the limitation in this program and my program is definitely refreshing of the images in gtkdialog. It is too slow and nothing can be done about that.

In C, instead of SVG you can use Cairo which is still a vector library but with completely different syntax. The 'images' can be held in memory, instead of writing to disk (essentially /tmp is mounted on RAM, but we still consider this 'writing to disk'). It's easy to make a structure for each type of image to make them an object.

This would significantly speed up the process. To make it even faster, you can forget GTK and just use Xlib, however Xlib programming is quite 'dangerous' and very tedious! There is not much documentation apart from reading the sources. I know, I have a couple of programs which make use of Xlib only.

--------------------------------------------------------------------------

Starhawk.

Bad news I'm afraid. I have an XO-1.5 which is a via chipset using openchrome graphics driver and the program I wrote is just too slow. It takes, - er - "some" time for the gui to show but the key presses are unresponsive. This *could* be due to the XO not having a standard keyboard, I dunno, I didn't go too far into it. It is certainly a hamstrung machine, you may have better luck on your thin clients. I suggest you rig up a test machine and go for it before we waste too much time.

Aside from that, I have significantly sped up the appearance time of the gui by changing the shell call form #!/bin/sh to #!/bin/ash.

Ash is a busybox applet but it is a full featured interactive sh environment, however does have limitations. The main one is no bashisms, which kind of means that you have a reduced syntax set. Fortunately, my original code only included 1... export -f, but unfortunately this was a biggy! gtkdialog can't 'see' a non-exported function. You have to explicitly call it.

I decided a redesign was in order; didn't take much. Just moved all functions to a functions library which can be made use of from subsequent gui programs. I also threw away about 200 lines of code... actually 20k! It doesn't speed it up much though as it was only image generation stuff.

Anyway, enough waffle - program attached.

EDIT 0:
Oh, I have also significantly changed what keys do what. There are far less actions now, only 0-9 and x, y, z. I am assuming that the bottom 2 rows are 'indicators' (idiot lights) only and as such they are not assigned any key or action. I also need to know what the hell many of these things are !!! MANF, UNSP, NO FLT ??? Should they do anything.. that is, are they 'buttons' or 'indicators'?

Again, read README.md.

[mister_electronico]

Thanks 01micko for your answer

01micko

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It's easy to make a structure for each type of image to make them an object.

How you do that you can put a small example.

It's a shame that gtkdialog works very well in Puppy.