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Sophie

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nfs-utils-1.1.5-2mdv2009.1.x86_64.rpm

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<H3><A NAME="SECTION00042100000000000000">
Light Load</A>
</H3>

<P>
We ran the SFS benchmarks with initial load set to 100 for 5 times
and incremented the load by 100 at each run. We measured the
server performances with different numbers of server threads,
1, 2, 4, 8 and 16. The results were listed here:

<P>
<DIV ALIGN="CENTER">
<TABLE CELLPADDING=3 BORDER="1">
<TR><TD ALIGN="CENTER">Run</TD>
<TD ALIGN="CENTER"># of Server</TD>
<TD ALIGN="CENTER"># of</TD>
<TD ALIGN="CENTER"># of Processes</TD>
<TD ALIGN="CENTER">Load</TD>
<TD ALIGN="CENTER">Throughput</TD>
<TD ALIGN="CENTER">Response Time</TD>
</TR>
<TR><TD ALIGN="CENTER">&nbsp;</TD>
<TD ALIGN="CENTER">Threads</TD>
<TD ALIGN="CENTER">Clients</TD>
<TD ALIGN="CENTER">Per Client</TD>
<TD ALIGN="CENTER">(Ops/Sec)</TD>
<TD ALIGN="CENTER">(Ops/Sec)</TD>
<TD ALIGN="CENTER">(Msec/Op)</TD>
</TR>
<TR><TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">100</TD>
<TD ALIGN="CENTER">98</TD>
<TD ALIGN="CENTER">1.4</TD>
</TR>
<TR><TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">2.7</TD>
</TR>
<TR><TD ALIGN="CENTER">3</TD>
<TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">300</TD>
<TD ALIGN="CENTER">302</TD>
<TD ALIGN="CENTER">3.3</TD>
</TR>
<TR><TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">400</TD>
<TD ALIGN="CENTER">402</TD>
<TD ALIGN="CENTER">6.8</TD>
</TR>
<TR><TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">100</TD>
<TD ALIGN="CENTER">99</TD>
<TD ALIGN="CENTER">1.0</TD>
</TR>
<TR><TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">1.7</TD>
</TR>
<TR><TD ALIGN="CENTER">3</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">300</TD>
<TD ALIGN="CENTER">302</TD>
<TD ALIGN="CENTER">2.0</TD>
</TR>
<TR><TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">400</TD>
<TD ALIGN="CENTER">398</TD>
<TD ALIGN="CENTER">3.3</TD>
</TR>
<TR><TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">100</TD>
<TD ALIGN="CENTER">98</TD>
<TD ALIGN="CENTER">1.0</TD>
</TR>
<TR><TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">1.4</TD>
</TR>
<TR><TD ALIGN="CENTER">3</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">300</TD>
<TD ALIGN="CENTER">303</TD>
<TD ALIGN="CENTER">1.5</TD>
</TR>
<TR><TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">400</TD>
<TD ALIGN="CENTER">398</TD>
<TD ALIGN="CENTER">2.1</TD>
</TR>
<TR><TD ALIGN="CENTER">1</TD>
<TD ALIGN="CENTER">8</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">100</TD>
<TD ALIGN="CENTER">98</TD>
<TD ALIGN="CENTER">1.0</TD>
</TR>
<TR><TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">8</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">200</TD>
<TD ALIGN="CENTER">1.4</TD>
</TR>
<TR><TD ALIGN="CENTER">3</TD>
<TD ALIGN="CENTER">8</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">300</TD>
<TD ALIGN="CENTER">302</TD>
<TD ALIGN="CENTER">1.6</TD>
</TR>
<TR><TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">8</TD>
<TD ALIGN="CENTER">4</TD>
<TD ALIGN="CENTER">2</TD>
<TD ALIGN="CENTER">400</TD>
<TD ALIGN="CENTER">398</TD>
<TD ALIGN="CENTER">2.1</TD>
</TR>
</TABLE>
</DIV>

<P>
The benchmarks show that even for the light load, the kernel-space NFS
server outperforms the user-space one by a wide margin. In this test
load, 4 kernel NFS server
threads provides adequate performance.

<P>
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<ADDRESS>
<I>H.J. Lu</I>
<BR><I>1999-08-15</I>
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