[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Compiling xenoprof
Renato, I should have been more specific. The sequence of commands from the guide that I use is below: On dom0: [start guests] opcontrol --reset opcontrol --no-vmlinux xm list Name ID Mem(MiB) VCPUs State Time(s) Domain-0 0 256 1 r----- 242.4 guest_0 11 128 1 -b---- 11.7 guest_1 12 128 1 -b---- 11.8 sudo opcontrol --start-daemon --active-domains=guest_0,guest_1 On each guest: opcontrol --reset opcontrol --no-vmlinux opcontrol --start Using default event: GLOBAL_POWER_EVENTS:100000:1:1:1 Failed to open profile device: Operation not permitted Using 2.6+ OProfile kernel interface. Couldn't start oprofiled. Check the log file "/var/lib/oprofile/oprofiled.log" and kernel syslog The above error always occurs when I issue the start command on the guests... Thanks, David Carr Santos, Jose Renato G wrote: >David, > >You are not able to run oprofile on domU only. >The current model supported for XenOProfile is system-wide >profiling, i.e. profiling multiple domains, using the same >hardware counters. In this model >Dom0 has to be the coordinator of a profiling session. >You have to first start oprofile daemon in dom0 indicating which >domains are participating in the profiling session. Then you >need to run "opcontrol --start" in each domU, and finally >start profiling from dom0 (opcontrol --start). >Look at the user guide in http://xenoprof.sourceforge.net >for more details > >Renato > > > >>>-----Original Message----- >>>From: David Carr [mailto:dc@xxxxxxxxx] >>>Sent: Wednesday, April 05, 2006 9:20 AM >>>To: Santos, Jose Renato G >>>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx >>>Subject: Re: [Xen-devel] Compiling xenoprof >>> >>>Renato, >>> >>>Thanks for your reply. The steps below got the kernels to >>>build. I'm not sure that everything is quite right yet >>>though. I can profile on domain 0 and also run opcontrol >>>--reset on the guests. However running "opcontrol --start" >>>on the guests results in: >>> >>>Using default event: GLOBAL_POWER_EVENTS:100000:1:1:1 Failed >>>to open profile device: Operation not permitted Using 2.6+ >>>OProfile kernel interface. >>> >>>Couldn't start oprofiled. >>>Check the log file "/var/lib/oprofile/oprofiled.log" and >>>kernel syslog >>> >>>It appears that this error is coming daemon/liblegacy/init.c >>>or daemon/init.c This error only occurs on the guests (which >>>are using the dom0 kernel). >>>opcontrol --start suceeds on dom0. >>> >>>Any ideas? >>> >>>Thanks again, >>>David Carr >>> >>>Install steps: >>> >>>In Xen 3.0.0 source directory: >>> >>>patch -p1 < xenoprof-2.0-xen-3.0.0.patch patch -p1 < >>>xenoprof-2.0-linux-2.6-sparse.patch >>>make kernels >>> >>>This will ultimately fail. Then do: >>> >>>In linux-2.6.12-xen0 directory: >>> >>>patch -p2 < xenoprof-2.0-linux-2.6.12.patch make kernels >>> >>>This will ultimately fail. Then do: >>> >>>In linux-2.6.12-xenU directory: >>> >>>patch -p2 < xenoprof-2.0-linux-2.6.12.patch make kernels >>> >>>This will succeed. Then do: >>> >>>make dist >>>sudo make install >>> >>> >>>In oprofile source directory: >>> >>>patch -p1 < oprofile-0.9.1-xen.patch >>> >>> >>>Install oprofile normally >>> >>> >>>Santos, Jose Renato G wrote: >>> >>> >>> >>>>David, >>>> >>>>You are right. This is not very clean. >>>>Yes, you need to do a "make" to create the xen0 and xenU >>>> >>>> >>>trees before >>> >>> >>>>applying the patch in step c). >>>>If you configure the kernel with oprofile support (CONFIG_OPROFILE) >>>>before step c) you will probably get a compilation error >>>> >>>> >>>when you run >>> >>> >>>>make since the patch was not applied yet. You could either delay >>>>setting (CONFIG_OPROFILE) for after you apply patch "c" or you can >>>>apply the patch after you get the compilation error, and >>>> >>>> >>>then run make >>> >>> >>>>again. >>>> >>>>It would be better if there was a "make" option to create >>>> >>>> >>>the xen0/xenU >>> >>> >>>>trees without compiling them. Does anybody know if there is such an >>>>option? I remember looking for it in the Makefile and not >>>> >>>> >>>finding it, >>> >>> >>>>but this was a while ago. >>>> >>>>We are now working on getting the xenoprof code included in >>>>xen-unstable. >>>>This should make life much easier for those wanting to use oprofile. >>>> >>>>Renato >>>> >>>> >>>> >>>> >>>> >>>>>>-----Original Message----- >>>>>>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx >>>>>>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of David >>>>>>Carr >>>>>>Sent: Tuesday, April 04, 2006 7:31 PM >>>>>>To: xen-devel@xxxxxxxxxxxxxxxxxxx >>>>>>Subject: [Xen-devel] Compiling xenoprof >>>>>> >>>>>>I'm having some trouble compiling Xen 3.0.0 with the xenoprof >>>>>>patches. >>>>>> >>>>>>The xenoprof instructions say: >>>>>> >>>>>> In order to run OProfile in Xen environments four patches are >>>>>>needed: >>>>>> a) xenoprof-2.0-xen-3.0.0.patch >>>>>> Patch for Xen hypervisor. >>>>>> b) xenoprof-2.0-linux-2.6-sparse.patch >>>>>> Patch for Xenolinux. Contains oprofile architecture specific >>>>>>driver >>>>>> for xen (Apply to linux-sparse tree in Xen source tree) >>>>>> c) xenoprof-2.0-linux-2.6.12.patch >>>>>> Patch for oprofile kernel module in linux 2.6.12. >>>>>>Contain modifications >>>>>> to generic oprofile driver code to support xen. >>>>>> >>>>>> >>>(Apply twice, >>> >>> >>>>>>once to >>>>>> dom0 and once to domU trees) >>>>>> >>>>>> >>>>>>Every thing goes fine until part c. The linux-2.6.12-xen0 and >>>>>>linux-2.6.12-xenU directories are empty until you build xen (and >>>>>>therefore can't be patched yet.) Doing a make world will >>>>>> >>>>>> >>>populate >>> >>> >>>>>>these trees but also compiles everything. >>>>>> >>>>>>What is the proper sequence of patching and make commands >>>>>> >>>>>> >>>to build a >>> >>> >>>>>>xenoprof tree? >>>>>> >>>>>>Thanks, >>>>>>David Carr >>>>>> >>>>>> >>>>>> >>>>>>_______________________________________________ >>>>>>Xen-devel mailing list >>>>>>Xen-devel@xxxxxxxxxxxxxxxxxxx >>>>>>http://lists.xensource.com/xen-devel >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>> >>> > >_______________________________________________ >Xen-devel mailing list >Xen-devel@xxxxxxxxxxxxxxxxxxx >http://lists.xensource.com/xen-devel > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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