Re: perf top -z not working?

[Ryan Johnson <ryan.johnson@cs.utoronto.ca>]

On 22/10/2012 10:45 AM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Oct 22, 2012 at 10:10:25AM -0400, Ryan Johnson escreveu:
>> On 22/10/2012 9:12 AM, David Ahern wrote:
>>> The kernel has nothing to do with the feature. From builtin-top.c,
>>> this part is either not happening or more likely not happening
>>> correctly.
>>>
>>>     if (top->zero)
>>>         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
>>>     else
>>>         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
>>>
>>> I recall it working recently - last year or so. Can you try
>>> different versions -- say 3.0, 3.2, 3.4 and latest? If you have a
>>> copy of Linus' tree or Arnaldo's git tree it should not take much
>>> time.
>> Chulmin says his 3.0 version works. My 3.2.18 doesn't. I don't have
>> a copy of the git tree on that machine, but I'll try building 3.4.x
>> and tip when I get a chance. I have never built perf-tools before,
>> though, so I'd appreciate tips on what might be different for
>> building perf-tools compared to the kernel, and how to avoid
>> building the standard kernel along the way. Hopefully it's just
>> configure-make-install?
> To build just the tools, on a /usr/src/linux or wherever you have the
> newer kernel sources:
>
>   make -C tools/perf install
>
> Then make sure you use what is in your ~/bin/ before the standard path:
>
>   export PATH=~/bin:$PATH
>   hash -r
>
> Then try perf top -z again.
OK! That doesn't sound bad at all.

Thanks,
Ryan