* [PATCH 0/3] xenoprof: improve handling of 32-bit guests on 64-bit xen
@ 2012-01-20 18:44 Marcus Granado
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From: Marcus Granado @ 2012-01-20 18:44 UTC (permalink / raw)
To: xen-devel; +Cc: George Dunlap
Hi,
this patch series for xen fixes some xenoprofile type glitches between
64-bit xen and 32-bit guests, enablingthe opcontrol callgraph option to
walk the call stack in both 32-bit and 64-bit guests when they are
running on 64-bit xen.
The escape-code patch (3/3) should be used with a corresponding patch in
the guest kernel definition of XENOPROF_ESCAPE_CODE so that both ends
agree on the same escape constant value.
A few comments from my tests with oprofile 0.9.6 in userspace:
- to obtain callgraphs of the xen code, you need to enable the
CONFIG_FRAME_POINTER flag during compilation of the xen binary, eg.
using "make" with "frame_pointer=y".
- if the oprofiled daemon is running in a 32-bit guest, it needs to
receive the xen-range in 32-bits, eg. --xen-image=/boot/xen-syms-4.1.1
--xen-range=80100000,801fe5ee
cheers,
Marcus
(1/3) xenoprof: Adjust indentation
(2/3) xenoprof: Handle 32-bit guest stacks properly in a 64-bit hypervisor
(3/3) xenoprof: Make the escape code consistent across 32 and 64-bit xen
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