Re: [PATCH v7 3/6] perf util: Create function to parse time percent

[Jin, Yao]

On 1/8/2018 10:38 PM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Jan 08, 2018 at 11:31:49AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Fri, Dec 08, 2017 at 09:13:43PM +0800, Jin Yao escreveu:
> > > Current perf report/script/... have a --time option to limit the time
> > > range of output. But right now it only supports absolute time.
> > >
> > > For easy using, now it can support a percent of time usage.
> > >
> > > For example:
> > >
> > > 1. Select the second 10% time slice
> > >     perf report --time 10%/2
> >
> > After applying this patch I'm not being able to get any of these
> > examples to work:
> >
> > [root@jouet home]# perf report --header | grep "time of"
> > # time of first sample : 22947.909226
> > # time of last sample : 22948.910704
> > [root@jouet home]#
> >
> > Then, when I try the first example:
> >
> > [root@jouet home]# perf report --stdio --time 1%-20%
> > Invalid time string
> > # To display the perf.data header info, please use --header/--header-only options.
> > #
> > [root@jouet home]#
> >
> > What am I doing wrong?
>
> Oh well, the way you worded this cset it looked like after applying it I
> would be able to use percents, etc, which is not the case, I'll probably
> need to apply the next patches to _then_ this work as advertised in this
> cset comment.
>
> Please try to make it clear in the commit messages these details, to
> ease reviewing.
>
> - Arnaldo

Hi Arnaldo,

Sorry about that.

I will take care next time to try my best to make the patch description 
more clear.

Thanks
Jin Yao