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* profiling active RHEL 4 PV domains with xenoprof
@ 2010-01-29  1:37 Andrew Evans
  2010-01-29 12:41 ` George Dunlap
  2010-01-29 17:04 ` Santos, Jose Renato G
  0 siblings, 2 replies; 10+ messages in thread
From: Andrew Evans @ 2010-01-29  1:37 UTC (permalink / raw)
  To: xen-devel

Hi,

Is it necessary to run a xenoprof-patched oprofile in a PV domU being
actively profiled? I ask because

http://xenoprof.sourceforge.net/xenoprof_2.0.txt

seems to say no (no mention of --xen switch) but

http://www.xen.org/files/summit_3/xenoprof_tutorial.pdf

seems to say yes (specifies use of --xen in domUs). I'm running RHEL 4
in the domU I want to actively profile, and RHEL 4 provides the ancient
oprofile-0.8.1 package, with no support for the --xen switch. I've
gotten oprofile 0.9.6 with xenoprof patches built on RHEL 4 but haven't
been able to test it due to XENOPROF_start failing (see other message).

Another thing I'm confused about: the above xenoprof tutorial also
specifies use of the --event switch in domUs, saying they must use the
same event as dom0. Makes sense, but my domUs are PV, and oprofile says
only timer interrupts are usable. So must I also use timer interrupts on
dom0?

thanks,

-Andrew

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2010-02-01 18:40 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-01-29  1:37 profiling active RHEL 4 PV domains with xenoprof Andrew Evans
2010-01-29 12:41 ` George Dunlap
2010-01-29 21:11   ` Andrew Evans
2010-01-29 17:04 ` Santos, Jose Renato G
2010-01-29 17:50   ` Dulloor
2010-01-29 21:14     ` Andrew Evans
2010-01-29 18:00   ` Andrew Evans
2010-01-30  0:24   ` Andrew Evans
2010-01-31 21:20     ` Santos, Jose Renato G
2010-02-01 18:40       ` Andrew Evans

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