Messages in this thread | | | Date | Thu, 7 Apr 2005 09:19:06 +1000 | From | Greg Banks <> | Subject | Re: bdflush/rpciod high CPU utilization, profile does not make sense |
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On Wed, Apr 06, 2005 at 06:01:23PM +0200, Jakob Oestergaard wrote: > > Problem; during simple tests such as a 'cp largefile0 largefile1' on the > client (under the mountpoint from the NFS server), the client becomes > extremely laggy, NFS writes are slow, and I see very high CPU > utilization by bdflush and rpciod. > > For example, writing a single 8G file with dd will give me about > 20MB/sec (I get 60+ MB/sec locally on the server), and the client rarely > drops below 40% system CPU utilization.
How large is the client's RAM? What does the following command report before and during the write?
egrep 'nfs_page|nfs_write_data' /proc/slabinfo
Greg. -- Greg Banks, R&D Software Engineer, SGI Australian Software Group. I don't speak for SGI. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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