On Thu, Feb 28, 2019 at 10:35:49AM -0800, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > Now report can show whole time periods with perf script, > but the user still has to find individual samples of interest > manually. > > It would be expensive and complicated to search for the > right samples in the whole perf file. Typically users > only need to look at a small number of samples for useful > analysis. > > Also the full scripts tend to show samples of all CPUs and all > threads mixed up, which can be very confusing on larger systems. > > Add a new --samples option to save a small random number of samples > per hist entry > > Use a reservoir sample technique to select a representatve > number of samples. > > Then allow browsing the samples using perf script > as part of the hist entry context menu. This automatically > adds the right filters, so only the thread or cpu of the sample > is displayed. Then we use less' search functionality > to directly jump the to the time stamp of the selected > sample.
I'm getting this error for workload sampling: File does not contain CPU events. Remove -C option to proceed. jirka
