RE: [Xen-users] IDE Disc Performance problems with Xen3-unstable

["Michael Lang" <Michael.Lang@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ian Pratt
> Sent: Sonntag, 05. Juni 2005 14:49
> To: Michael Lang; xen-users@xxxxxxxxxxxxxxxxxxx
> Cc: ian.pratt@xxxxxxxxxxxx
> Subject: RE: [Xen-users] IDE Disc Performance problems with 
> Xen3-unstable
> 
>  
>  
> > ive encountered performance problems with Xen3-unstable and a
> > raid5 with 5 120Gb  Maxtor IDE discs (1 Spare). After testing in 
> > different Kernels i also noticed that 'normal' IDE Disc 
> access is very 
> > slow
> 
> If you're using our 2.4.6.11.11-xen0 kernel, have you checked 
> the correct driver for your IDE controller is compiled in?
> 
thanks, seems that i missed this one :)

Raid5 Discs
# bonnie -d . -s 100 -v 5 -p 2
Bonnie: Warning: You have 500MB RAM, but you test with only 100MB datasize!
Bonnie:          This might yield unrealistically good results,
Bonnie:          for reading and seeking and writing.
Bonnie 1.4: File './Bonnie.5568', size: 104857600, volumes: 5
Writing with putc()...         done:  24393 kB/s  77.3 %CPU
Rewriting...                   done:  16383 kB/s  10.1 %CPU
Writing intelligently...       done:  40455 kB/s  22.7 %CPU
Reading with getc()...         done:  23184 kB/s  60.9 %CPU
Reading intelligently...       done:  52382 kB/s  17.8 %CPU
Seek numbers calculated on first volume only
Seeker 1...Seeker 2...start 'em...done...done...
              ---Sequential Output (nosync)--- ---Sequential Input-- --Rnd
Seek-
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --04k
(02)-
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec
%CPU
server 5* 100 24393 77.3 40455 22.7 16383 10.1 23184 60.9 52382 17.8  289.5
0.8


Physical Disc
# bonnie -d . -s 100 -v 5 -p 2
Bonnie: Warning: You have 500MB RAM, but you test with only 100MB datasize!
Bonnie:          This might yield unrealistically good results,
Bonnie:          for reading and seeking and writing.
Bonnie 1.4: File './Bonnie.5582', size: 104857600, volumes: 5
Writing with putc()...         done:  35985 kB/s  96.8 %CPU
Rewriting...                   done:  13909 kB/s   8.2 %CPU
Writing intelligently...       done:  46646 kB/s  19.6 %CPU
Reading with getc()...         done:  18230 kB/s  50.0 %CPU
Reading intelligently...       done:  39141 kB/s   9.3 %CPU
Seek numbers calculated on first volume only
Seeker 1...Seeker 2...start 'em...done...done...
              ---Sequential Output (nosync)--- ---Sequential Input-- --Rnd
Seek-
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --04k
(02)-
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec
%CPU
server 5* 100 35985 96.8 46646 19.6 13909  8.2 18230 50.0 39141  9.3  201.2
0.6

> Ian
> 
> 
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> 


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