Hi all:
I've been trying to get a hold of Michael to get his patches upstream but
haven't heard back from him yet. It would be great if the AIX community
could help me out by pointing out/providing patches that should be checked
into our repository so we can fully support Ganglia on AIX platform.
Thanks,
Bernard
On Wed, Oct 20, 2010 at 11:52 PM, Ron Wellnitz <[email protected]>wrote:
> Hi dev zero :)
>
> we use ganglia to monitoring our AIX boxes (AIX 5.3 TL 11) and saw the same
> differences in the cpu usage/idle in the output from vmstat and gangia.
>
> First you can try to use the AIX RPM packages from this site [
> http://www.perzl.org/ganglia/ ]. I have not yet testet the latest version
> (3.1.2), maybe it will fix the problem.
>
> In my case i replaced the default metrics from gmond by values from vmstat.
>
>
> Regards,
> Ron
>
>
> Am 20.10.2010 18:15, schrieb dev Zero:
>
> Have noticed that the metrics.c file has been coded using the
> perfstat_cpu_total system call, and was wondering about the reasoning in
> using the perfstat_cpu_total CPU stats in preference to those produced via
> the perfstat_partition_total system call ?
>
> The reason I ask is that there seems to be a wide level of varience between
> the CPU User and CPU Idle metrics produced by both system calls.
> If someone understands the difference between the CPU metrics provided by
> these two system calls, and why they would provide considerably different
> CPU User and Idle metrics on a 2 CPU Aix 5.3 LPAR with no sharing of CPU's
> involved, I would very interested to hear from you.
>
> The standard Aix performance tools (vmstat, sar, topas, nmon) all seem to
> be using the metrics provided by the perfstat_partition_total. This means
> (in my case) that Ganglia's CPU User and CPU Idle graphs do no match what is
> shown to be happening on that LPAR with the standard Aix Performance tools.
> (ie. Ganglia graphs show LPARs with 30% ish idle time, but vmstat etc shows
> no idle time).
>
> Documentation on the perfstat_cpu_total system call seems to indicate that
> the perfstat_partition_total system call should be used instead.
>
>
> http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_cputot.htm
> Quote : All data consumers requiring processor use must be modified to
> support PURR-based computations as shown in the example for the
> perfstat_partition_total interface under Perfstat API programming.
>
> While I'm confident that there is a good reason for the use of
> perfstat_cpu_total in the aix/metrics.c source, I would like to understand
> the reasoning and so banish any nervousness in trusting the stats provided
> the Ganglia product.
>
> Appreciate any information shedding light on this.
>
> Thanks and Best Regards to all.
>
> PS. My hat is off to the Ganglia Team/Community. :-) Very impressive
> product.
>
>
>
> ------------------------------------------------------------------------------
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>
>
> ------------------------------------------------------------------------------
> Nokia and AT&T present the 2010 Calling All Innovators-North America
> contest
> Create new apps & games for the Nokia N8 for consumers in U.S. and Canada
> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in
> marketing
> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store
> http://p.sf.net/sfu/nokia-dev2dev
> _______________________________________________
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------------------------------------------------------------------------------
Nokia and AT&T present the 2010 Calling All Innovators-North America contest
Create new apps & games for the Nokia N8 for consumers in U.S. and Canada
$10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store
http://p.sf.net/sfu/nokia-dev2dev
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