Yuto Nakai
2011-Jan-07 06:09 UTC
[Xen-users] Don''t mount hardware performance counter using xenoprof
Hi, I want to use xenoprof to profile the overhead of the hypervisor. I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net Debian GNU/Linux 5.0 (lenny) Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz My problems are: In Dom0, But hardware performance counters don''t be mounted after initialization (opcontrol --init) # ls /dev/oprofile backtrace_depth cpu_buffer_size pointer_size buffer cpu_type stats buffer_size dump time_slice buffer_watershed enable 0(and 1,2,3) directories are not exist. Is there any reason for this ? Any help is appreciated. Thanks, Yuto Nakai _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Yuto Nakai
2011-Jan-07 10:12 UTC
[Xen-devel] Don''t mount hardware performance counter using xenoprof
Hi, I want to use xenoprof to profile the overhead of the hypervisor. I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net Debian GNU/Linux 5.0 (lenny) Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz My problems are: In Dom0, But hardware performance counters don''t be mounted after initialization (opcontrol --init) # ls /dev/oprofile backtrace_depth cpu_buffer_size pointer_size buffer cpu_type stats buffer_size dump time_slice buffer_watershed enable 0(and 1,2,3) directories are not exist. Is there any reason for this ? Any help is appreciated. Thanks, Yuto Nakai _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Yuto Nakai
2011-Jan-08 07:06 UTC
[Xen-devel] Don''t mount hardware performance counter using xenoprof
Hi, I want to use xenoprof to profile the overhead of the hypervisor. I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net Debian GNU/Linux 5.0 (lenny) Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz My problems are: In Dom0, But hardware performance counters don''t be mounted after initialization (opcontrol --init) # ls /dev/oprofile backtrace_depth cpu_buffer_size pointer_size buffer cpu_type stats buffer_size dump time_slice buffer_watershed enable 0(and 1,2,3) directories are not exist. Is there any reason for this ? Any help is appreciated. Thanks, Yuto Nakai _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Jan-10 14:26 UTC
Re: [Xen-devel] Don''t mount hardware performance counter using xenoprof
On Sat, Jan 08, 2011 at 04:06:58PM +0900, Yuto Nakai wrote:> Hi, > > I want to use xenoprof to profile the overhead of the hypervisor. > I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net > > Debian GNU/Linux 5.0 (lenny) > Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 > My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz > > My problems are: > In Dom0, But hardware performance counters don''t be mounted > after initialization (opcontrol --init) > > # ls /dev/oprofile > backtrace_depth cpu_buffer_size pointer_size > buffer cpu_type stats > buffer_size dump time_slice > buffer_watershed enable > > 0(and 1,2,3) directories are not exist. > > Is there any reason for this ?Do they exist when booting a baremetal kernel?> > Any help is appreciated. Thanks, Yuto Nakai> _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Yuto Nakai
2011-Jan-10 14:53 UTC
Re: [Xen-devel] Don''t mount hardware performance counter using xenoprof
2011/1/10 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>> On Sat, Jan 08, 2011 at 04:06:58PM +0900, Yuto Nakai wrote: > > Hi, > > > > I want to use xenoprof to profile the overhead of the hypervisor. > > I patched the oprofile-0.9.5 using the patch from > xenoprof.sourceforge.net > > > > Debian GNU/Linux 5.0 (lenny) > > Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 > > My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz > > > > My problems are: > > In Dom0, But hardware performance counters don''t be mounted > > after initialization (opcontrol --init) > > > > # ls /dev/oprofile > > backtrace_depth cpu_buffer_size pointer_size > > buffer cpu_type stats > > buffer_size dump time_slice > > buffer_watershed enable > > > > 0(and 1,2,3) directories are not exist. > > > > Is there any reason for this ? > > Do they exist when booting a baremetal kernel? > >Thank you for your response. Does booting a baremetal kernel means booting Dom0? If it means so, they don''t exist.> > > > Any help is appreciated. Thanks, Yuto Nakai > > > _______________________________________________ > > Xen-devel mailing list > > Xen-devel@lists.xensource.com > > http://lists.xensource.com/xen-devel > >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Jan-10 15:22 UTC
Re: [Xen-devel] Don''t mount hardware performance counter using xenoprof
> > Do they exist when booting a baremetal kernel? > > > > > Thank you for your response. > > > Does booting a baremetal kernel means booting Dom0?No. Baremetal means booting the same kernel but without the Xen hypervisor. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Yuto Nakai
2011-Jan-10 15:34 UTC
Re: [Xen-devel] Don''t mount hardware performance counter using xenoprof
2011/1/11 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>> > > Do they exist when booting a baremetal kernel? > > > > > > > > Thank you for your response. > > > > > > Does booting a baremetal kernel means booting Dom0? > > No. Baremetal means booting the same kernel but without the Xen hypervisor. >I understood. They exist when booting a baremetal kernel. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Jan-10 17:22 UTC
Re: [Xen-devel] Don''t mount hardware performance counter using xenoprof
On Tue, Jan 11, 2011 at 12:34:58AM +0900, Yuto Nakai wrote:> 2011/1/11 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> > > > > > Do they exist when booting a baremetal kernel? > > > > > > > > > > > Thank you for your response. > > > > > > > > > Does booting a baremetal kernel means booting Dom0? > > > > No. Baremetal means booting the same kernel but without the Xen hypervisor. > > > > I understood. > > They exist when booting a baremetal kernel.Ok, then the answer is that nobody has looked in a long time (I think since 2.6.18) to hook up the oprofile (or rather the code that that gets invoked when a perf counter is triggered) to the Xen hypervisor. It might make sense to look at how 2.6.18 did it (especially what were the hypercalls and where) and see how to port it over to a pvops kernel. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
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