Floating point exception in client/server mode

Floating point exception in client/server mode

[Martin Steigerwald]

Hi Jens, hi everyone,

Client is 32-bit Debian Wheezy with my 2.0.7 fio package and server is 64-bit 
Debian Wheezy with 2.0.7 fio package.


ms@mango:~/Zeit> cat /proc/version
Linux version 3.2.0-2-686-pae (Debian 3.2.15-1) (debian-
kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-3) ) #1 SMP Sun Apr 
15 17:56:31 UTC 2012


ms@mango:~/Zeit> vim randreadwrite.job
ms@mango:~/Zeit> fio --client=frisbie randreadwrite.job 
hostname=frisbie, be=0, 64-bit, os=Linux, arch=x86-64, fio=2.0.7
<frisbie> zuf�lliglesen: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, 
iodepth=1
<frisbie> zuf�lligschreiben: (g=0): rw=randwrite, bs=4K-4K/4K-4K, 
ioengine=sync, iodepth=1
<frisbie> Starting 2 processes
<frisbie> =2): [] [100.0% done] [613K/650K /s] [149 /158  iops] [eta 00m:00s]
zuf�lliglesen: (groupid=0, jobs=1): err= 0: pid=8090
zsh: floating point exception  fio --client=frisbie randreadwrite.job
ms@mango:~/Zeit#136> cat randreadwrite.job 
[global]
size=2g
runtime=60
direct=1
[zuf�lliglesen]
rw=randread
[zuf�lligschreiben]
rw=randwrite


root@frisbie:~# fio --server=
fio: server listening on 0.0.0.0,8765



root@frisbie:~# fio --server=
fio: server listening on 0.0.0.0,8765
^C
fio: terminating on signal 2
root@frisbie:~# cat /proc/version
Linux version 3.2.0-1-amd64 (Debian 3.2.6-1) (ben@decadent.org.uk) (gcc 
version 4.6.2 (Debian 4.6.2-14) ) #1 SMP Fri Feb 17 05:17:36 UTC 2012



This is reproducable. Second time I used fio --server (without the = sign) - no 
difference.

Any ideas?

Thanks,
-- 
Martin Steigerwald - teamix GmbH - http://www.teamix.de
gpg: 19E3 8D42 896F D004 08AC A0CA 1E10 C593 0399 AE90

Re: Floating point exception in client/server mode

[Jens Axboe]

On 05/09/2012 01:37 PM, Martin Steigerwald wrote:
> Hi Jens, hi everyone,
> 
> Client is 32-bit Debian Wheezy with my 2.0.7 fio package and server is 64-bit 
> Debian Wheezy with 2.0.7 fio package.
> 
> 
> ms@mango:~/Zeit> cat /proc/version
> Linux version 3.2.0-2-686-pae (Debian 3.2.15-1) (debian-
> kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-3) ) #1 SMP Sun Apr 
> 15 17:56:31 UTC 2012
> 
> 
> ms@mango:~/Zeit> vim randreadwrite.job
> ms@mango:~/Zeit> fio --client=frisbie randreadwrite.job 
> hostname=frisbie, be=0, 64-bit, os=Linux, arch=x86-64, fio=2.0.7
> <frisbie> zuf�lliglesen: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, 
> iodepth=1
> <frisbie> zuf�lligschreiben: (g=0): rw=randwrite, bs=4K-4K/4K-4K, 
> ioengine=sync, iodepth=1
> <frisbie> Starting 2 processes
> <frisbie> =2): [] [100.0% done] [613K/650K /s] [149 /158  iops] [eta 00m:00s]
> zuf�lliglesen: (groupid=0, jobs=1): err= 0: pid=8090
> zsh: floating point exception  fio --client=frisbie randreadwrite.job

Not reproducing here. Can you enable core dumps and see where it divides
by zero?

-- 
Jens Axboe