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SubjectRe: [PATCH v6 1/5] tools, perf, script: Add --insn-trace for instruction decoding
Em Thu, Sep 20, 2018 at 11:05:36AM -0700, Andi Kleen escreveu:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add a --insn-trace short hand option for decoding and disassembling
> instruction streams for intel_pt. This automatically pipes the
> output into the xed disassembler to generate disassembled instructions.
> This just makes this use model much nicer to use
>
> Before
>
> % perf record -e intel_pt// ...
> % perf script --itrace=i0ns --ns -F +insn,-event,-period | xed -F insn: -A -64
> swapper 0 [000] 117276.429606186: ffffffff81010486 pt_config ([kernel.kallsyms]) nopl %eax, (%rax,%rax,1)
> swapper 0 [000] 117276.429606186: ffffffff8101048b pt_config ([kernel.kallsyms]) add $0x10, %rsp
> swapper 0 [000] 117276.429606186: ffffffff8101048f pt_config ([kernel.kallsyms]) popq %rbx
> swapper 0 [000] 117276.429606186: ffffffff81010490 pt_config ([kernel.kallsyms]) popq %rbp
> swapper 0 [000] 117276.429606186: ffffffff81010491 pt_config ([kernel.kallsyms]) popq %r12
> swapper 0 [000] 117276.429606186: ffffffff81010493 pt_config ([kernel.kallsyms]) popq %r13
> swapper 0 [000] 117276.429606186: ffffffff81010495 pt_config ([kernel.kallsyms]) popq %r14
> swapper 0 [000] 117276.429606186: ffffffff81010497 pt_config ([kernel.kallsyms]) popq %r15
> swapper 0 [000] 117276.429606186: ffffffff81010499 pt_config ([kernel.kallsyms]) retq
> swapper 0 [000] 117276.429606186: ffffffff8101063e pt_event_add ([kernel.kallsyms]) cmpl $0x1, 0x1b0(%rbx)
> swapper 0 [000] 117276.429606186: ffffffff81010645 pt_event_add ([kernel.kallsyms]) mov $0xffffffea, %eax
> swapper 0 [000] 117276.429606186: ffffffff8101064a pt_event_add ([kernel.kallsyms]) mov $0x0, %edx
> swapper 0 [000] 117276.429606186: ffffffff8101064f pt_event_add ([kernel.kallsyms]) popq %rbx
> swapper 0 [000] 117276.429606186: ffffffff81010650 pt_event_add ([kernel.kallsyms]) cmovnz %edx, %eax
> swapper 0 [000] 117276.429606186: ffffffff81010653 pt_event_add ([kernel.kallsyms]) jmp 0xffffffff81010635
> swapper 0 [000] 117276.429606186: ffffffff81010635 pt_event_add ([kernel.kallsyms]) retq
> swapper 0 [000] 117276.429606186: ffffffff8115e687 event_sched_in.isra.107 ([kernel.kallsyms]) test %eax, %eax
>
> Now
>
> % perf record -e intel_pt// ...
> % perf script --insn-trace --xed
> ... same output ...
>
> XED needs to be installed with:
>
> > git clone https://github.com/intelxed/mbuild.git mbuild
> > git clone https://github.com/intelxed/xed
> > cd xed
> > mkdir obj
> > cd obj
> > ../mfile.py
> > sudo ../mfile.py --prefix=/usr/local install
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>

Fixed up whitespace damage in the Documentation for building xed,
applied.

- Arnaldo

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