reiser4 causes system freeze for 1-2 seconds

reiser4 causes system freeze for 1-2 seconds

[sbenni]

Hello,

I have a 120Gb partition with reiser4. If I start a command like "cp <500mb file> dd" within it the system frequently freezes for 1-2 seconds and ent:hda8! uses nearly 100% cpu. This causes the sound output from xmms to be interrupted and my mouse freezes also. If i renice X and xmms to -10 it is okay. 

Is this the desired behaviour ?

Can I do sth. else than renicing all time critical programs ?

My system is a debian amd64 with linux-2.6.16-mm2.


Best Regards

Benni

Re: reiser4 causes system freeze for 1-2 seconds

[Edward Shishkin]

sbenni@gmx.de wrote:

Hello.

>Hello,
>
>I have a 120Gb partition with reiser4. If I start a command like "cp <500mb file> dd" within it the system frequently freezes for 1-2 seconds and ent:hda8! uses nearly 100% cpu. This causes the sound output from xmms to be interrupted and my mouse freezes also. If i renice X and xmms to -10 it is okay. 
>
>Is this the desired behaviour ?
>  
>

No.

>Can I do sth. else than renicing all time critical programs ?
>
>My system is a debian amd64 with linux-2.6.16-mm2.
>  
>

How much RAM is available in your system?
If this is much more then 512M, then boot with "mem=512M", and let
us know if this freeze still takes place (to make sure this is because of
unwisely assigned atom_max_size).

Thanks,
Edward.

>
>Best Regards
>
>Benni
>
>
>  
>

Re: reiser4 causes system freeze for 1-2 seconds

[sbenni]

Hello Edward, 

first thanks for your answer. 

My system has 1536M. After I has started my system with 512M I copied three different files and the system freezed only once for less than 0,5 seconds and "ent:hda8!" shows up less frequently in top. But after rebooting with 1536M I could not reproduce the longer freezes. So it has to be also related with uptime and programs I'm using. Uptime was 2 days and the most important programs to mention are firefox and azureus. Azureus was downloading to the reiser4 partition but only with 10-15kb/s.

I have rebooted with 512M and will try it some days. 


Thanks

Benni


On Wed, 04 Apr 2007 03:08:36 +0400
Edward Shishkin <edward@namesys.com> wrote:

> sbenni@gmx.de wrote:
> 
> Hello.
> 
> >Hello,
> >
> >I have a 120Gb partition with reiser4. If I start a command like "cp <500mb file> dd" within it the system frequently freezes for 1-2 seconds and ent:hda8! uses nearly 100% cpu. This causes the sound output from xmms to be interrupted and my mouse freezes also. If i renice X and xmms to -10 it is okay. 
> >
> >Is this the desired behaviour ?
> >  
> >
> 
> No.
> 
> >Can I do sth. else than renicing all time critical programs ?
> >
> >My system is a debian amd64 with linux-2.6.16-mm2.
> >  
> >
> 
> How much RAM is available in your system?
> If this is much more then 512M, then boot with "mem=512M", and let
> us know if this freeze still takes place (to make sure this is because of
> unwisely assigned atom_max_size).
> 
> Thanks,
> Edward.
> 
> >
> >Best Regards
> >
> >Benni
> >
> >
> >  
> >

Re: reiser4 causes system freeze for 1-2 seconds

[sbenni]

After some hours the problem has occured again. 


with azureus running, almost three second freezed

top - 19:28:24 up  8:25,  9 users,  load average: 6.89, 2.72, 1.26
Tasks: 110 total,  11 running,  98 sleeping,   0 stopped,   1 zombie
Cpu(s):  2.6% us, 95.8% sy,  0.2% ni,  0.0% id,  0.0% wa,  0.7% hi,  0.7% si
Mem:    510208k total,   505184k used,     5024k free,      776k buffers
Swap:  1959888k total,     2660k used,  1957228k free,   193908k cached

  PID  USER     PR   NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND              
 2168 root        15      -5     0      0      0     D  91.9     0.0        0:11.10 ent:hda8!            
10470 benni     18      0  6564   580  432    R   3.8     0.1        0:01.25 cp                   
 4511  root        5     -10  100m  55m 6452 S   3.3    11.2      13:40.66 XFree86              
 6443  azureus  35    19   381m  80m  21m R  0.5    16.2        9:57.66 java                 



without azureus, decoding a encrypted file, one second freezed

top - 19:43:22 up  8:40,  9 users,  load average: 1.89, 1.80, 1.44
Tasks: 110 total,   2 running, 107 sleeping,   0 stopped,   1 zombie
Cpu(s):  8.7% us, 89.7% sy,  0.3% ni,  0.0% id,  0.0% wa,  0.7% hi,  0.7% si
Mem:    510208k total,   504368k used,     5840k free,     7728k buffers
Swap:  1959888k total,     2660k used,  1957228k free,   236652k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND              
10746 benni      25   0  7148   1048  836   D 76.2     0.2        0:28.56 otrdecoder           
 2168  root        11  -5     0          0    0     S 19.6      0.0        0:13.63 ent:hda8.            
10747 benni      20   0  7148   1048  836   R  1.3      0.2        0:01.14 otrdecoder           
 4511  root         5 -10  100m   52m 6452  S  0.7     10.6      13:58.77 XFree86       
 




On Wed, 04 Apr 2007 03:08:36 +0400
Edward Shishkin <edward@namesys.com> wrote:

> sbenni@gmx.de wrote:
> 
> Hello.
> 
> >Hello,
> >
> >I have a 120Gb partition with reiser4. If I start a command like "cp <500mb file> dd" within it the system frequently freezes for 1-2 seconds and ent:hda8! uses nearly 100% cpu. This causes the sound output from xmms to be interrupted and my mouse freezes also. If i renice X and xmms to -10 it is okay. 
> >
> >Is this the desired behaviour ?
> >  
> >
> 
> No.
> 
> >Can I do sth. else than renicing all time critical programs ?
> >
> >My system is a debian amd64 with linux-2.6.16-mm2.
> >  
> >
> 
> How much RAM is available in your system?
> If this is much more then 512M, then boot with "mem=512M", and let
> us know if this freeze still takes place (to make sure this is because of
> unwisely assigned atom_max_size).
> 
> Thanks,
> Edward.
> 
> >
> >Best Regards
> >
> >Benni
> >
> >
> >  
> >

Re: reiser4 causes system freeze for 1-2 seconds

[Xu CanHao]

Hi!

Azureus is famous for its fsync() behavior, which is known extremely
slow in reiser4. Please search the mailing-list for previous posts.

Thanks!

2007/4/5, sbenni@gmx.de <sbenni@gmx.de>:
>
> After some hours the problem has occured again.
>
>
> with azureus running, almost three second freezed
>
> top - 19:28:24 up  8:25,  9 users,  load average: 6.89, 2.72, 1.26
> Tasks: 110 total,  11 running,  98 sleeping,   0 stopped,   1 zombie
> Cpu(s):  2.6% us, 95.8% sy,  0.2% ni,  0.0% id,  0.0% wa,  0.7% hi,  0.7% si
> Mem:    510208k total,   505184k used,     5024k free,      776k buffers
> Swap:  1959888k total,     2660k used,  1957228k free,   193908k cached
>
>   PID  USER     PR   NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  2168 root        15      -5     0      0      0     D  91.9     0.0        0:11.10 ent:hda8!
> 10470 benni     18      0  6564   580  432    R   3.8     0.1        0:01.25 cp
>  4511  root        5     -10  100m  55m 6452 S   3.3    11.2      13:40.66 XFree86
>  6443  azureus  35    19   381m  80m  21m R  0.5    16.2        9:57.66 java
>
>
>
> without azureus, decoding a encrypted file, one second freezed
>
> top - 19:43:22 up  8:40,  9 users,  load average: 1.89, 1.80, 1.44
> Tasks: 110 total,   2 running, 107 sleeping,   0 stopped,   1 zombie
> Cpu(s):  8.7% us, 89.7% sy,  0.3% ni,  0.0% id,  0.0% wa,  0.7% hi,  0.7% si
> Mem:    510208k total,   504368k used,     5840k free,     7728k buffers
> Swap:  1959888k total,     2660k used,  1957228k free,   236652k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 10746 benni      25   0  7148   1048  836   D 76.2     0.2        0:28.56 otrdecoder
>  2168  root        11  -5     0          0    0     S 19.6      0.0        0:13.63 ent:hda8.
> 10747 benni      20   0  7148   1048  836   R  1.3      0.2        0:01.14 otrdecoder
>  4511  root         5 -10  100m   52m 6452  S  0.7     10.6      13:58.77 XFree86
>
>
>
>
>
> On Wed, 04 Apr 2007 03:08:36 +0400
> Edward Shishkin <edward@namesys.com> wrote:
>
> > sbenni@gmx.de wrote:
> >
> > Hello.
> >
> > >Hello,
> > >
> > >I have a 120Gb partition with reiser4. If I start a command like "cp <500mb file> dd" within it the system frequently freezes for 1-2 seconds and ent:hda8! uses nearly 100% cpu. This causes the sound output from xmms to be interrupted and my mouse freezes also. If i renice X and xmms to -10 it is okay.
> > >
> > >Is this the desired behaviour ?
> > >
> > >
> >
> > No.
> >
> > >Can I do sth. else than renicing all time critical programs ?
> > >
> > >My system is a debian amd64 with linux-2.6.16-mm2.
> > >
> > >
> >
> > How much RAM is available in your system?
> > If this is much more then 512M, then boot with "mem=512M", and let
> > us know if this freeze still takes place (to make sure this is because of
> > unwisely assigned atom_max_size).
> >
> > Thanks,
> > Edward.
> >
> > >
> > >Best Regards
> > >
> > >Benni
> > >
> > >
> > >
> > >
>