Re: Fwd: perf trace cannot work with software events ?

[David Ahern <dsahern@gmail.com>]

On 03/29/11 10:55, baozhao wrote:
> zhao bao <baozhao <at> gmail.com> writes:
> 
> 
>> I applyed this patch in the builtin-script.c , recompile and install
>> it. But I found it still doesn't  show any CR2 address info. The patch
>> seems to list a addr column, but perf script still work as before.
> 
>  Hi, I think I find the problem.
> In builtin-script.c,   array output_fields should also be
> changed,PERF_OUTPUT_ADDR should added to  [PERF_TYPE_SOFTWARE],  am I
> right?

The defaults do need to better detect when it exists. Until then you can
add addr to the --fields option.


> 
> static u64 output_fields[PERF_TYPE_MAX] = {
>        ....
>       [PERF_TYPE_SOFTWARE] = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | \
>                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | \
>                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM | \
>                               PERF_OUTPUT_ADDR,
> 
> 
> Here is the output:
> [root@localhost lab]#  /root/bin/perf script
>           hello  2229 [000]  1339.388865: page-faults: 0x804963c
>   c05ccbb3 clear_user ([kernel.kallsyms])
>           hello  2229 [000]  1339.388898: page-faults: 0x670834
>  c05ccbb3 clear_user ([kernel.kallsyms])
>           hello  2229 [000]  1339.388915: page-faults: 0xbf905d6b
>    c05cc70c __copy_to_user_ll ([kernel.kallsyms])
>           hello  2229 [000]  1339.388945: page-faults: 0x652870
>       870 _start (/lib/ld-2.13.so)
>           hello  2229 [000]  1339.388950: page-faults: 0x656920
>      4920 _dl_start (/lib/ld-2.13.so)
>           hello  2229 [000]  1339.388954: page-faults: 0x669acb
>     17acb __i686.get_pc_thunk.bx (/lib/ld-2.13.so)
>           hello  2229 [000]  1339.388958: page-faults: 0x66fe54
>      4939 _dl_start (/lib/ld-2.13.so)

And per another thread we can look at converting the sample addresses to
symbols/dsos.

David


> 
> 
> 
> 
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