XaoS zooming algorithm: bestprice assertion fails while rendering large size images

[PiotrNestor]

Rendering 16k image fails on Linux box with 64GiB RAM and 14G on local SSD

xaos -render Octal.xpf -size 15360x8640 -basename octal_16k 
Initializing
Loading catalogs
Processing command line options
Enabling animation replay

Entering calculation loop!
Rendering frame 0...
xaos: src/engine/zoom.cpp:498: void mkrealloc_table(const number_t*, realloc_t*, unsigned int, number_t, number_t, number_t, unsigned char*): Assertion `bestprice >= 0' failed.

The xpf

(initstate)
(filter 'anti #t)
(palette 1 16291 0)
(formula 'octal)
(maxiter 320)
(outcoloring 6)
(incoloring 2)
(view -0.47351 -0.2333 0.55991 0.55991)

Linux box ulimit -a

ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 127019
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 4096
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

Is there some Linux configuration that is needed or this is Xaos memory allocation issue?

[kanurag94]

This is an issue in xaos zooming algorithm. I am not sure how to go about it now. But let's create this issue for tracking this further.

PS: I added some info a few days back regarding this #77 (comment)

[PiotrNestor]

I can help running tests if needed ...

[kanurag94]

@PiotrNestor Yes please, go ahead.

[kanurag94]

@trathborne as you suggested in #77 I tried converting many int(s) to long(s) used in calculation. I can still reproduce the crash.
I am using the above mentioned xpf config with a size of 6400x8400 (my ram just gives up at the mentioned sizes in above xpf)

Do you have anything in mind that you'd like me to try?

[trathborne]

@kanurag94 thanks for trying ... I saw some of those changes (um did you accidentally commit some? :) ) and tried a bit myself. I'm out of ideas for you but will poke at it more when I have time.