Messages in this thread | | | Date | Wed, 19 Jun 2013 20:17:06 -0700 | From | Jed Davis <> | Subject | Re: [PATCH] perf: ARM: Record the user-mode PC in the call chain. |
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On Tue, Jun 18, 2013 at 02:13:19PM +0100, Will Deacon wrote: > On Fri, Jun 14, 2013 at 12:21:11AM +0100, Jed Davis wrote: > > With this change, we no longer lose the innermost entry in the user-mode > > part of the call chain. See also the x86 port, which includes the ip. > > > > It's possible to partially work around this problem by post-processing > > the data to use the PERF_SAMPLE_IP value, but this works only if the CPU > > wasn't in the kernel when the sample was taken. > > Thanks. I guess we need something similar for arm64 too. Could you cook a > similar patch please?
Done (and tested, on the ARM V8 Foundation Model).
It looked as if the powerpc and sparc ports might have similar issues, but I haven't checked on them yet.
--Jed
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