Messages in this thread | | | Subject | Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack | From | Jungseok Lee <> | Date | Thu, 15 Oct 2015 23:24:57 +0900 |
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On Oct 9, 2015, at 11:24 PM, James Morse wrote:
Hi James,
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> I think unwind_frame() needs to walk the irq stack too. [2] is an example > of perf tracing back to userspace, (and there are patches on the list to > do/fix this), so we need to walk back to the start of the first stack for > the perf accounting to be correct.
I plan to do re-spin this series without [PATCH 2/2] since 1) Akashi's approach looks better than mine and 2) you have the perf patches for [2]. This would help us to move forward.
Thoughts?
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> [0] sudo ./perf record -e mem:<address of __do_softirq()>:x -ag -- sleep 10 > [1] sudo ./perf report --call-graph --stdio > [2] http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html
Best Regards Jungseok Lee
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