NFS problem : I/O error

peng_z_1 — Tue, 24 Jun 2014 13:58:07 GMT

Dear all,

I am now trying to run a weather related program using native mode on Xeon Phi.Since the program needs to read a big input file and write computing

results back to an even bigger output file,so I try to use NFS to mount a directory on the host to the MIC card. I followed the below steps :

1. Edit /etc/exports,/etc/hosts.allow and /etc/hosts.deny to share a directory with MIC

2.Restart NFS service

After the above 2 steps ,I check the status with command "showmount -e" and it shows the configuation in /etc/exports has worked.

3.Login the MIC card,mount the mouning point to the shared directory on the host, the command is like this:

mount -o nolock 172.31.1.254:/home/shared/folder /home/mount/point

Now I can see that every file which are stored in /home/shared/folder are just in the mounting point directory,and I can also rm ,cp or these edit files just like in the local disk.Everything seems OK. However,when I run my native mode program in this mounting directory on MIC,it crashed after runing a while returing an error as bellow:

orrtl: severe (154): array index out of bounds
Image PC Routine Line Source
sw_model 000000000099962B Unknown Unknown Unknown
sw_model 0000000000997FB4 Unknown Unknown Unknown
sw_model 0000000000942EA7 Unknown Unknown Unknown
sw_model 00000000008DF2E5 Unknown Unknown Unknown
sw_model 00000000008E2CD1 Unknown Unknown Unknown
libpthread.so.0 00002AAE91AFC800 Unknown Unknown Unknown
libmpi_mt.so.4 00002AAE911B99B0 Unknown Unknown Unknown

It seemed that the runtime error happened when the program writing back to the outputfile in the mounting directory.Because when I set another directory on MIC which is not mounted to host as the output directory, this error didn't show again.

Does anyone have any idea about this?

Best Regards

Peng Zhang

Hi Peng,

Loc_N_Intel — Wed, 25 Jun 2014 23:28:43 GMT

Hi Peng,

Could you share your sample program? Also, what MPSS version and Intel compiler version are you using?

Thank you.

topic Hi Peng, in Software Archive

NFS problem : I/O error

Hi Peng,