Em Tue, Aug 12, 2014 at 05:09:17PM +0900, Namhyung Kim escreveu: > Hi Stephane, > > On Tue, 12 Aug 2014 06:44:34 +0200, Stephane Eranian wrote: > > Hi, > > > > > > My understanding is that the -z option is used to only print a profile > > since the last refresh. So if I have a refresh of 5s, then it prints the > > profile > > based on the samples accumulated over the last 5 seconds. > > Yep, that's what I understand about the -z behavior too. > > > > > The Z mode used to be available interactively. Nowadays, it seems only > > avail from the cmdline. But it does not work. > > Hmm.. it seems the stdio supports 'z' key but TUI don't.
Problem introduced long ago when I moved 'top' to use the same hists browser as 'report', to have all the zooming, --sort, etc goodies. I see that Namhyung proposed a patch to fix that, will review it, thanks! - Arnaldo > > > > I run a simple test. > > $ sudo perf top -z > > > > Then for 5s I run a cycle-burning noploop program. > > It shows up at the top. But when it terminates, the program still stays > > at the top of the profile for a long time. This is not what I'd expect. > > The noploop line should disappear in the next couple of refreshes after > > the program has terminated. > > > > I am using tip.git and seeing the problem. But it seems, it's been there > > for a > > long time. > > > > Any idea what's wrong? > > Looking at the code, it only zero out the annotation info but hist > entries. I guess we need to check the flag and throw out existing > entries instead of decaying. > > Also I wonder about the order of decaying - shouldn't it be decayed > before processing current entries? It seems current code processes > current entries first and then decays... > > I'll prepare patches for this soon. > > Thanks, > Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
