Hello,

I got strange things with one of my computer: many WU are failed. ( I dunno if I got this since long time :x )

After look at my computer, I can see that in dmesg :

[231078.578969] traps: lasievee_1.10_x[19613] trap divide error ip:473a95 sp:7fffe513e630 error:0 in lasievee_1.10_x86_64-pc-linux-gnu[400000+178000]
[231079.656548] traps: lasievee_1.10_x[19615] trap divide error ip:473a95 sp:7fffc01b1f40 error:0 in lasievee_1.10_x86_64-pc-linux-gnu[400000+178000]
[231080.764813] traps: lasievee_1.10_x[19617] trap divide error ip:473a95 sp:7fff99a3d340 error:0 in lasievee_1.10_x86_64-pc-linux-gnu[400000+178000]


It seem to be a div 0 trouble because I can reproduice with simple C program :

Laptop /tmp $ cat test.c
int main()
{
int a =0;
int b = 1337;
int c = b /a;
}
Laptop /tmp $ gcc test.c -o test
Laptop /tmp $ ./test
zsh: floating point exception ./test

and in dmesg :

Laptop /tmp $ dmesg | tail -n 1
[217680.748399] traps: test[18276] trap divide error ip:400513 sp:7fff52af41b0 error:0 in test[400000+1000]

The interessting question is why :)

here my BOINC's logs for one task :

23-May-2015 23:20:47 [NFS@Home] Starting task OPN_463442_32516_6 using lasievee version 110 in slot 6
23-May-2015 23:20:48 [NFS@Home] Started upload of OPN_463442_52892_6_0
23-May-2015 23:20:48 [NFS@Home] Computation for task OPN_463442_32516_6 finished
23-May-2015 23:20:48 [NFS@Home] Starting task OPN_463442_39032_4 using lasievee version 110 in slot 6
23-May-2015 23:20:49 [NFS@Home] Computation for task OPN_463442_39032_4 finished
23-May-2015 23:20:49 [NFS@Home] Starting task OPN_463442_51092_5 using lasievee version 110 in slot 6
23-May-2015 23:20:50 [NFS@Home] Finished upload of OPN_463442_51560_4_0
23-May-2015 23:20:50 [NFS@Home] Finished upload of OPN_463442_52892_6_0
23-May-2015 23:20:50 [NFS@Home] Started upload of OPN_463442_33128_4_0
23-May-2015 23:20:50 [NFS@Home] Started upload of OPN_463442_32516_6_0
23-May-2015 23:20:50 [NFS@Home] Computation for task OPN_463442_51092_5 finished
23-May-2015 23:20:50 [NFS@Home] Starting task OPN_463442_45616_4 using lasievee version 110 in slot 6
23-May-2015 23:20:51 [NFS@Home] Computation for task OPN_463442_45616_4 finished
23-May-2015 23:20:51 [NFS@Home] Starting task OPN_463442_33756_2 using lasievee version 110 in slot 6
23-May-2015 23:20:52 [NFS@Home] Finished upload of OPN_463442_33128_4_0
23-May-2015 23:20:52 [NFS@Home] Finished upload of OPN_463442_32516_6_0


The WU is : http://escatter11.fullerton.edu/nfs/result.php?resultid=44005061
and the computer is : http://escatter11.fullerton.edu/nfs/show_host_detail.php?hostid=1600008

If you need more informations of if you got idea of test to do : just tell me :)

Thank you for your help :)

I also came to report several divide-by-zero errors, 9 out of 9 recent 15e tasks.

Mine is a Windows 7 service installation.

An example task is 44010815:

<core_client_version>7.4.42</core_client_version>
<![CDATA[
<message>
(unknown error) - exit code -1073741676 (0xc0000094)
</message>
<stderr_txt>
boinc initialized
work files resolved, now working
-> projects/escatter11.fullerton.edu_nfs/lasievee_1.08_windows_x86_64__notphenomiix6.exe
-> -r
-> -f
-> 65440000
-> -c
-> 4000
-> -R
-> -o
-> ../../projects/escatter11.fullerton.edu_nfs/OPN_463442_65440_1_0
-> ../../projects/escatter11.fullerton.edu_nfs/OPN_463442.poly


Unhandled Exception Detected...

- Unhandled Exception Record -
Reason: Integer Divide by Zero (0xc0000094) at address 0x000000000042de4e

Already warned the admin to delete OPN_463442 wu's.