Linas,
based on
https://github.com/opencog/atomspace/blob/master/opencog/scm/opencog.scm#L113
I assume that cog-undefined-handle is getting obsolete. However it is
still on the wiki page
http://wiki.opencog.org/w/Scheme#cog-undefined-handle
Could you update that accordingly? (I wanted to do it but I'm not fully
confident).
Thanks,
Nil
On 05/29/2017 03:01 PM, Nil Geisweiller wrote:
Thanks a lot for your detailed bug report! Ideally you would create
github issues if each of these, but this is already greatly appreciated.
I'll have a careful look at them, already though regarding the slow down
due to cog-undefined-handle this is probably because it is getting
obsolete and I haven't removed it from all PLN rules (doing that now).
Nil
On 05/29/2017 02:50 AM, rocketpwr.com wrote:
Dear OpenCog Development Community,
First, thank you for your hard work on this project.
I found a few bugs that I have been able to work around that you might
find helpful. Hopefully the below description of the problems and my
work-arounds will help you or someone else who comes across the same
problems.
/*1) Really really long compile times on loading up the
conceptnet4.scm test dataset in
test-datasets/conceptnet/conceptnet4.scm*./ I left it to run
overnight, and it still had not finished. Actually, I believe it was
going to take 70+ hours to load and compile this 14.5 MB file. This
seemed strange to me as smaller files loaded much faster. What I
determined by experiment is that, for some unknown reason, the Guile
Scheme compiler had a compile time that is proportional approximately
n^2 of the number of rules. Here are some results on my test rig (a 4
core 4 GB Ubuntu 16.04 setup):
|
Rulesloadtime rules/sec
259737.00
6343120.45
10007014.29
124911011.35
|
Because the Conceptnet4.scm file is about 60.5K I estimate that the
compile time would be around 71 hours or 3 days. I am guessing this
is a bug/feature in Guile Scheme which was not really meant as a
database.
My work-around: a) split the 60K rule file into 61 files of 1K rules
each, and then compile them. Each file compiles in around 14 seconds,
reducing the compile time to around 1.5 hours. Once compiled, the
rules do not need to be compiled again. b) I wrote a small loader
that loads all 61 files into Guile in a single command.
*/2) Really long execution time for (cog-bind
deduction-inheritance-rule):/* I am experimenting with PLN, using the
how-to tutorial: PLN by hand (http://wiki.opencog.org/w/PLN_by_Hand).
After loading up conceptnet4, I tried to run the inheritance rule as
per the tutorial:
|
(cog-bind deduction-inheritance-rule)
|
Again, I left the computer to run overnight, and by morning it wasn't
complete. I searched the machine and found the errors in the
opencog.log file which has grown to 1 GB. It was filled with a repeat
of this message (with some other hex-addresses changed):
|
In unknown file:
?: 7 [opencog-extension cog-bind-first-n (# -1)]
In ice-9/boot-9.scm:
157: 6 [catch #t # ...]
In unknown file:
?: 5 [apply-smob/1 #]
In ice-9/boot-9.scm:
157: 4 [catch #t # ...]
In unknown file:
?: 3 [apply-smob/1 #]
In opencog.scm:
89: 2 [cog-undefined-handle]
In ice-9/boot-9.scm:
102: 1 [#args)> wrong-number-of-args ...]
In unknown file:
?: 0 [apply-smob/1 # wrong-number-of-args ...]
ERROR: In procedure apply-smob/1:
ERROR: Wrong number of arguments to #
ABORT: wrong-number-of-args
|
I have been researching this for a few hours and I was about to give
up. I then decided to experiment with smaller numbers of atoms
(rules). I used the Guile profiler and it showed that the majority of
the time was being wasted in error "Catch" and formatting functions.
After setting debug breakpoints, I decided that the problem was
actually in this cog-undefined-handle function, and not the
cog-bind-first-n function, or whatever apply-smob/1 is. (I can't find
any documentation on apply-smob/1.) The cog-undefined-handle function
was in /usr/local/share/opencog/scm/opencog.scm:
I changed this line:
|
(define-public (cog-undefined-handle X) '())
|
to
|
(define-public(cog-undefined-handle .X)'())
|
Note: I am not expert in Guile, Scheme, or Lisp. A poster on stack
exchange said that by inserted the dot character in the argument list,
it allows a Scheme function to take any number of arguments. This
seems to work -- now the opencog.log is clean and the (cog-bind
deduction-inheritance-rule) runs on the entire data set in only a few
minutes.
*/
/*
*/3) Hard coded gcc/g++ 4.8 compiler version in octool prevents
installation on Ubuntu 16.04 LTS/*. I understand that the base Linux
configuration for Opencog is still 14.04 LTS. However, that version
is already 3 years old and I had just installed a 16.04 LTS image, and
I did not want to reinstall after investing the time to set it up
properly. To get octool to finish the compilation and subsequent
installation, I
