Messages in this thread | | | Date | Fri, 4 Apr 2014 09:21:16 +0800 | Subject | ktap and ebpf integration | From | Jovi Zhangwei <> |
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Hi Alexei,
We talked a lot on ktap and ebpf integration in these days, Now I think we can put into deeply to thinking out some technical issues in there.
Firstly, I want to make sure you are support this ktap and ebpf integration direction, I aware you have ongoing 'bpf filter' patch set work, which actually overlapping with ktap integration efforts (IMO the interface should be unified and simple for user, so I think filter debugfs file is not a good interface), so please let me know your answer about this.
If the answer is yes, then we can go through ebpf core improvement, for example: - support global variable access this is mandatory for dynamic tracing, otherwise, there have no possible to run a simple script like get function execution time. - support timer in kernel The final solution must need to support kernel timer for profiling, and sampling stack. - support register multi-event in one script - support trace_end
If the answer of first question is no, you still believe your "bpf filter" solution is a correct way, that's means there have no need to integrate ktap and ebpf, and don't need any ktap upstream efforts, I 'm fine with it, then I can make another technical plan for ktap.
Thank you.
Jovi
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