Re: [GIT PULL 0/6] perf/core improvements and fixes

[pi3orama]

发自我的 iPhone

> 在 2015年6月4日，下午8:40，Ingo Molnar <mingo@xxxxxxxxxx> 写道：
> 
> 
> * Wangnan (F) <wangnan0@xxxxxxxxxx> wrote:
> 
>>> So how do you generate the .o? Why cannot the tool, if it sees that the filter 
>>> parameter is eBPF source code, do that automatically?
>> 
>> I think compiling on the fly is our goal, and Alexei is working on it.
> 
> So what exact command line are you using to create the .o?
> 
> What exactly should users type to create a simple eBPF filter profile?
> 

I have mentioned in previous mail:

Use

 # perf record -e bpf_source.c cmdline 

 to create a eBPF filter from source,

Use

# perf record -e bpf_object.o cmdline 

to create a eBPF filter from object intermedia.

Use

# perf bpf compile bpf_source.c --kbuild=kernel-build-dir -o bpf_object.o

to create the .o

I think this should be enough. Currently only the second case has been implemented.

Thanks.

> Thanks,
> 
>    Ingo

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