On Mon, Feb 29, 2016 at 02:36:24PM -0800, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > Add a new mode to only print metrics. Sometimes we don't care about > the raw values, just want the computed metrics. This allows more > compact printing, so with -I each sample is only a single line. > This also allows easier plotting and processing with other tools. > > The main target is with using --topdown, but it also works with > -T and standard perf stat. A few metrics are not supported. > > To avoiding having to hardcode all the metrics in the code it uses > a two pass approach: first compute dummy metrics and only > print the headers in the print_metric callback. Then use the callback > to print the actual values. > > There are some additional changes > in the stat printout code to handle all metrics being on a single line. > > One issue is that the column code doesn't know in advance what events > are not supported by the CPU, and it would be hard to find out > as this could change based on dynamic conditions. That causes > empty columns in some cases. > > The output can be fairly wide, often you may need more than 80 columns. > > Example: > > % perf stat -a -I 1000 --metric-only > 1.001452803 frontend cycles idle insn per cycle stalled cycles per > insn branch-misses of all branches
where does 'frontend' collumn come from? can't see it in the code or get it in output.. thanks, jirka > 1.001452803 158.91% 0.66 2.39 > 2.92% > 2.002192321 180.63% 0.76 2.08 > 2.96% > 3.003088282 150.59% 0.62 2.57 > 2.84% > 4.004369835 196.20% 0.98 1.62 > 3.79% > 5.005227314 231.98% 0.84 1.90 > 4.71% > SNIP
