[Pvfs2-developers] pvfs2-cp performance with single client and single server

[Scott Atchley]

On Dec 29, 2006, at 11:44 AM, Pete Wyckoff wrote:

> pvfs2-cp isn't that great a code.  Find yourself an MPI interface
> benchmark, like "perf".  This produces server load around 90%:
>
> ib30$ mpiexec -n 1 2402/perf -n 10 -s 800m -c 100m -f pvfs2:/pvfs- 
> ib/x1
> #np size   chunk  write no sync- read no sync-- write sync---- read  
> sync-----
> #   (MB)    (MB)  (MB/s)         (MB/s)         (MB/s)         (MB/s)
> 1    800.0  100.0 681.56 +-  1.9 612.87 +-  2.2 679.99 +-  1.0  
> 613.76 +-  3.0
>
> With 1 MB flow buffers, the server is pegged and slower, more like
> what you're seeing:
>
> ib30$ mpiexec -n 1 2402/perf -n 10 -s 800m -c 100m -f pvfs2:/pvfs- 
> ib/x1
> #np size   chunk  write no sync- read no sync-- write sync---- read  
> sync-----
> #   (MB)    (MB)  (MB/s)         (MB/s)         (MB/s)         (MB/s)
> 1    800.0  100.0 342.73 +-  3.8 317.24 +-  2.6 343.96 +-  2.2  
> 318.34 +-  1.8

Pete,

Is this the perf included with ROMIO? If so, the only option it takes  
is -fname. It does not let me specify -n, -s or -c.

Can you point me to the app you are using?

Thanks,

Scott