[Lustre-discuss] high CPU usage on MDS

[Isaac Huang]

I think it's TCP/IP according to the process list. It'd help to find
out where the CPU time was spent, e.g. by oprofile.

- Isaac

On Wed, Jul 06, 2011 at 12:14:54PM -0600, Colin Faber wrote:
> Hi,
> 
> More details are needed here. What type of interconnect are you using? 
> What are your clients doing? etc.
> 
> -cf
> 
> 
> On 07/04/2011 11:08 PM, Ekaterina Popova wrote:
> > Hello!
> >
> > We've got one MDS (Lustre 2.0) with 4 processors (Intel(R) Core(TM)2
> > Quad CPU    Q9500  @ 2.83GHz).
> > Our CPU usage is HIGH - 80-100% .
> > With top command we see:
> >    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> > 2973 root      15   0     0    0    0 R 35.0  0.0   1509:09 socknal_sd02
> >    2972 root      15   0     0    0    0 S 33.5  0.0   1132:13 socknal_sd01
> >    2971 root      15   0     0    0    0 S 19.8  0.0   1129:12 socknal_sd00
> >    2974 root      16   0     0    0    0 R 13.7  0.0 830:47.46 socknal_sd03
> >
> > Is it normal situation? Can we improve performance at mds ? Maybe
> > setting any parameters?
> > (Only about 70 clients mount to Lustre and not all of them work with it.)
> >
> > With regards,
> > Popova Ekaterina
> >
> >
> >
> >
> > _______________________________________________
> > Lustre-discuss mailing list
> > Lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
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