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<DEFANGED_div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial;color:navy'><DEFANGED_div class=Section1>This
was one of the tools that I thought could be used to make up the full
requirement. </DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>In conjunction with lockmeter we’d
have enough there for users to begin doing the tuning</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>that the white papers call out using mpstat.
</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'> </DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>There are some practical considerations,
like the performance impact of having a lockmeter</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>enabled kernel to deal with. Any of these performance
counters will have a cost.</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'> </DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks,</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dave Howell</DEFANGED_span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><DEFANGED_span style='font-size:
10.0pt;font-family:Arial;color:navy'> </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Tahoma><DEFANGED_span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><DEFANGED_span style='font-weight:bold'>From:</DEFANGED_span></b> Hu, Boris <br>
<b><DEFANGED_span style='font-weight:bold'>Sent:</DEFANGED_span></b> Saturday, October 18, 2003
5:41 AM<br>
<b><DEFANGED_span style='font-weight:bold'>To:</DEFANGED_span></b> Howell, David P;
cgl_discussion<br>
<b><DEFANGED_span style='font-weight:bold'>Cc:</DEFANGED_span></b> Smith, Stanley W; Wenjen,
Wendell<br>
<b><DEFANGED_span style='font-weight:bold'>Subject:</DEFANGED_span></b> RE: [cgl_discussion]
Enhancements to mpstat utility</DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span
style='font-size:12.0pt'> </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 color=blue
face="Comic Sans MS"><DEFANGED_span style='font-size:10.0pt;font-family:"Comic Sans MS";
color:blue'>In the linux, vmstat could provide some of the lacking information,
such as minor faults, context switches, system calls. </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 color=blue
face="Comic Sans MS"><DEFANGED_span style='font-size:10.0pt;font-family:"Comic Sans MS";
color:blue'> </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 color=blue
face="Comic Sans MS"><DEFANGED_span style='font-size:10.0pt;font-family:"Comic Sans MS";
color:blue'>boris</DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face="Comic Sans MS"><DEFANGED_span
style='font-size:10.0pt;font-family:"Comic Sans MS"'> </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face="Comic Sans MS"><DEFANGED_span
style='font-size:10.0pt;font-family:"Comic Sans MS"'>There are my thoughts,
not my employer's.</DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 color=blue
face="Comic Sans MS"><DEFANGED_span style='font-size:10.0pt;font-family:"Comic Sans MS";
color:blue'> </DEFANGED_span></font></p>
<DEFANGED_div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Tahoma><DEFANGED_span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><DEFANGED_span style='font-weight:bold'>From:</DEFANGED_span></b>
cgl_discussion-bounces@lists.osdl.org [mailto:cgl_discussion-bounces@lists.osdl.org]
<b><DEFANGED_span style='font-weight:bold'>On Behalf Of </DEFANGED_span></b>Howell, David P<br>
<b><DEFANGED_span style='font-weight:bold'>Sent:</DEFANGED_span></b> </DEFANGED_span></font><font size=2 face=Tahoma><DEFANGED_span style='font-size:10.0pt;font-family:Tahoma'>Friday, October
10, 2003</DEFANGED_span></font><font size=2 face=Tahoma><DEFANGED_span style='font-size:10.0pt;
font-family:Tahoma'> </DEFANGED_span></font><font size=2 face=Tahoma><DEFANGED_span
style='font-size:10.0pt;font-family:Tahoma'>3:34 AM</DEFANGED_span></font><font size=2
face=Tahoma><DEFANGED_span style='font-size:10.0pt;font-family:Tahoma'><br>
<b><DEFANGED_span style='font-weight:bold'>To:</DEFANGED_span></b> cgl_discussion<br>
<b><DEFANGED_span style='font-weight:bold'>Cc:</DEFANGED_span></b> Smith, Stanley W; Wenjen,
Wendell<br>
<b><DEFANGED_span style='font-weight:bold'>Subject:</DEFANGED_span></b> [cgl_discussion]
Enhancements to mpstat utility</DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span
style='font-size:12.0pt'> </DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>Another item for release 3, from a
customer who is moving multi-threaded APPs to Linux.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>They reported using mpstat to help
tune the locking in the original environment, but were </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>dismayed that there is no Linux
equivalent or other tools for doing the same.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>After looking at the open source
mpstat that is available for Red Hat Linux, it just displays</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>the minimal level of processor
utilization statistics (processor/%user/%system/%idle/intr).</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>Other versions for Unix report
additional information:</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Minor/Major faults</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Interprocessor cross calls</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Context switches</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- System calls</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Process migrations from this
processor</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Kernel lock statistics (Mutex
stalls)</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>- Wait time</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>This customer said that the
inability to use these tools on Linux was hindering their ability</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>to tune their application
effectively for Linux.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>My guess is that the current Linux
mpstat is exposing everything that is available from the </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>kernel, and that to do better will
require additional statistics gathering in the kernel as well </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>as the hooks in the mpstat utility
to display them. This may be hard to sell to LKML.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>While having all of this under on
hood is likely best for the customer, i.e. in mpstat, it would</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>seem reasonable if the functionality
were offered through several tools; I was thinking of the </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>lockmeter framework and utilities
for the kernel locking statistics. Having a complete set of </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>tools for determining bottlenecks
would be very useful. Documentation that describes how </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>to use the utilities, and how to
identify and debug real problems is also needed.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>For customers who are used to using
these tools for tuning on other Unixes, keeping as </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>much of the presentation of the
stats similar would help, but may be difficult or impossible </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>for Linux. </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>Reference projects:</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>
<a href="http://freshmeat.net/projects/mpstat/?topic_id=862">http://freshmeat.net/projects/mpstat/?topic_id=862</a>
- Utility version used on Linux (?)</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>
LKML, for kernel changes to enable additional statistics</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>Documentation:</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>
- Using the mpstat load displayer (SCO)</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>
- <a href="http://docs.sun.com/db/doc/806-0625/6j9vfilr4?q=mpstat&a=view">http://docs.sun.com/db/doc/806-0625/6j9vfilr4?q=mpstat&a=view</a>
</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'>
- <a
href="http://sunsite.uakom.sk/sunworldonline/swol-08-1998/swol-08-perf.html">http://sunsite.uakom.sk/sunworldonline/swol-08-1998/swol-08-perf.html</a></DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoNormal" DEFANGED_style="margin-left:.5in"><font size=2 face=Arial><DEFANGED_span style='font-size:10.0pt;
font-family:Arial'><DEFANGED_span
style='font-size:10.0pt;font-family:Arial'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoAutoSig" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span style='font-size:
12.0pt'><DEFANGED_span style='font-size:12.0pt'>These are my opinions and not official
opinions of Intel Corp.</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoAutoSig" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span style='font-size:
12.0pt'><DEFANGED_span style='font-size:12.0pt'> </DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoAutoSig" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span style='font-size:
12.0pt'><DEFANGED_span style='font-size:12.0pt'>David Howell</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoAutoSig" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span style='font-size:
12.0pt'><DEFANGED_span style='font-size:12.0pt'>Intel Corporation</DEFANGED_span></DEFANGED_span></font></p>
<p class="MsoAutoSig" DEFANGED_style="margin-left:.5in"><font size=3 face="Times New Roman"><DEFANGED_span style='font-size:
12.0pt'><DEFANGED_span style='font-size:12.0pt'>Telco Server Development</DEFANGED_span></DEFANGED_span></font></p>
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