Messages in this thread | | | Date | Sat, 13 Apr 2002 17:01:14 +0900 (JST) | Subject | Re: [PATCH] zerocopy NFS updated | From | Hirokazu Takahashi <> |
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Hi,
Thanks to Andrew Theurer for his help. He posted the result of testing my patches on nfs@lists.sourceforge.net list, we can get a great performance.
> I tried the patch with great performance improvement! I ran my nfs read > test (48 clients read 200 MB file from one 4-way SMP NFS server) and > compared your patches to regular 2.5.7. Regular 2.5.7 resulted in 87 MB/sec > with 100% CPU utilization. Your patch resulted 130 MB/sec with 82% CPU > utilization! This is very good! I took profiles, and as expected, > csum_copy and file_read_actor were gone with the patch. Sar reported nearly > 40 MB/sec per gigabit adapter (there are 4) during the test. That is the > most I have seen so far. Soon I will be doing some lock analysis to make > sure we don't have any locking problems. Also, I will see if there is > anyone here at IBM LTC that can assist with your development of zerocopy on > UDP. Thanks for the patch! > > Andrew Theurer
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