[PVFS-developers] Re: [PVFS-users] Recompile pvfs module for SuSE 2.4.19-NUMA

[Claude Pignol]

Greetings,

An upgrade to 2.4.21 fixes the problem.
Compile and start OK.
I have noticed a performance problem in reading from PVFS.
With big I/O (few MB) reading is around 1/3 of the performance of writing.
Pvfs deamons with default parameters
Reading/Writing from on node to pvfs using dd.
I have verified the disk performance of all the 10 I/O nodes
I have also verified the network perf to all the nodes.
What is the best strategy/tools to address this kind of problem?
Thanks


Claude Pignol wrote:

> Greetings,
>
> I try to do a benchmark of pvfs with the SuSE 2.4.19-NUMA kernel
> to compare with the SuSE 2.4.19-SMP kernel.
> No problem to compile and load the pvfs.o module with the SMP kernel
>
> With the NUMA kernel I get 3 undefined symbols when I try to load the 
> module
> pvfs.o: unresolved symbol __pollwait
> pvfs.o: unresolved symbol mem_map
> pvfs.o: unresolved symbol iget4
>
> The kernel source is installed.
> Any idea?
> Thanks in advance
> Claude
>
>
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