Oh PS, AVX gives about 25% speed up compared to SSE. Would it be useful for me to send the data that it segfaults on?
-----Original Message----- From: freesurfer-boun...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Z K Sent: Tuesday, 23 June 2015 1:50 AM To: Freesurfer support list Subject: Re: [Freesurfer] Segmentation fault in mris_fix_topology when compiling with gcc 4.8 + AVX2 Thank you for this information. -Zeke On 06/22/2015 02:22 AM, Chris Adamson wrote: > Everyone, > > I know this is a fairly specific issue but nonetheless. > > If you compile Freesurfer 5.3.0 with the option -march=core-avx2 with > gcc 4.8 it can cause mris_fix_topology to segfault at > utils/mrisurf.c:64770 mrisCopyDefectPatch > > gcc 4.9 also does the same thing. > > If you still use AVX but disable AVX2, i.e. use -march=core-avx-i then > it does not segfault. > > Just something to keep in mind. > > *Dr **Chris Adamson > *Research Officer, Developmental Imaging, *Murdoch Childrens Research > Institute *Murdoch Childrens Research Institute Royal Children's > Hospital Flemington Road, Parkville, Victoria 3052, Australia > www.mcri.edu.au <http://www.mcri.edu.au/> > > E chris.adam...@mcri.edu.au > T 03 9936 6780 > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please visit http://www.symanteccloud.com > ______________________________________________________________________ > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com If you have any questions, please contact MCRI IT Servicedesk for further assistance. ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
