Hilaire how can we reproduce your problem?
Stef On May 20, 2012, at 9:41 PM, Hilaire Fernandes wrote: > Is the memory object corrupted in Pharo 1.4? And explain the problem I > have in some situation with DrGeo on XO-1 256MB without swap. > > http://lists.squeak.org/pipermail/vm-dev/2012-May/010652.html > > Hilaire > > > Le 20/05/2012 13:57, Hilaire Fernandes a écrit : >> With Pharo 1.4 (but not with Pharo 1.3) we have a problem leading to the >> crash of DrGeo (based on Pharo 1.4) on low memory machine. >> >> It is clearly a problem related to Pharo 1.4 >> >> Any idea why ? >> >> Hilaire >> >> >> -------- Original Message -------- >> Subject: Re: [Sugar-devel] Dr.Geo on XO 1 >> Date: Sun, 20 May 2012 13:46:01 +0200 >> From: Bert Freudenberg <[email protected]> >> To: Sascha Silbe <[email protected]> >> CC: Ariel Calzada <[email protected]>, Hilaire Fernandes >> <[email protected]>, Sugar Devel >> <[email protected]>, Rafael Ortiz >> <[email protected]> >> >> >> >> On 20.05.2012, at 11:00, Sascha Silbe wrote: >> >>> Bert Freudenberg <[email protected]> writes: >>> >>>> Nope, that was not it. I compiled with -mtune=geode, makes no >>>> difference. >>> >>> Make sure to set -march=<architecture> to something appropriate. -march >>> tells gcc what instructions it can use (so anything that doesn't support >>> these instructions will fail to run the resulting executable), whereas >>> -mtune only tells it to optimise for a certain processor type (but the >>> executable will continue to run on other processors as long as they >>> support the instruction set specified by -march). >> >> I actually had used "-march=pentiumpro -mtune=geode" as recommended here: >> >> http://wiki.laptop.org/go/Geode_LX >> >> and even with an additional -O0 it still crashes. >> >>> In gdb I see it's segfaulting inside the GC logic. It's really >>>> puzzling this only happens on the XO-1 ... >>> >>> You could try booting an XO-1.5 with mem=256M (append that to boot-file >>> in /bootpart/boot/olpc.fth) to simulate the memory pressure of an XO-1. >> >> >> YES! That reproduces the crash on XO-1.5. Good thinking! :) >> >> I could also reproduce it in a virtual Ubuntu 12 with 768 MB RAM (!) but no >> swap. Top reports: >> >> Mem: 766204k total, 601588k used, 164616k free, 45624k buffers >> Swap: 0k total, 0k used, 0k free, 277024k cached >> >> but DrGeo still crashes. >> >> OTOH, Etoys runs fine using the same Squeak VM on the same system (and on >> XO-1). So I wonder what the new DrGeo does differently ... >> >> - Bert - >> >> >> >> >> > >
