Messages in this thread | | | Date | Fri, 11 Apr 2014 19:30:00 +0200 | From | Jiri Olsa <> | Subject | Re: [RFC 5/5] perf: Enable multiple hist_entry_group output |
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On Thu, Apr 10, 2014 at 04:11:01PM -0400, Don Zickus wrote: > Enable multiple hist_entry_group groups in the output based on a sort > method. > > Currently only 'perf report' is hooked in with '--group-sort='. The choices > are cpu, pid, and cacheline. Only --stdio works right now. I haven't figured > out how the other outputs work. > > Sample output from 'perf mem record -a grep -r foo /* > /dev/null' > > (normal) perf mem report --percent-limit=1.0 --stdio > > Overhead Samples > Local Weight Memory access Symbol > ........ ............ ............ ........................ ........................ > > 4.13% 1 1759 Uncached hit [k] ahci_scr_read > 1.16% 1 492 L1 hit [k] _raw_read_lock > > (cpu groups) perf mem report --group-sort=cpu --percent-limit=1.0 --stdio > > Overhead Samples CPU > Local Weight Memory access Symbol > ........ ............ ............ ........................ ........................ > > 28.80% 1239 25 > 3.07% 377 L1 hit [k] complete_walk > 2.76% 339 LFB hit [k] update_cfs_shares > 2.66% 326 LFB hit [k] copy_user_enhanced_f > 2.11% 259 Local RAM hit [k] copy_user_enhanced_f > 1.84% 226 LFB hit [k] copy_user_enhanced_f > 1.74% 213 LFB hit [k] copy_user_enhanced_f > 1.53% 187 LFB hit [k] copy_user_enhanced_f > 1.04% 128 LFB hit [k] copy_user_enhanced_f > 1.01% 124 LFB hit [k] copy_user_enhanced_f > 27.44% 990 7 > 15.06% 1759 Uncached hit [k] ahci_scr_read > 4.21% 492 L1 hit [k] _raw_read_lock > 1.04% 122 LFB hit [k] find_busiest_group > 1.02% 1 7 L1 hit [.] __gconv_transform_ut > 20.34% 1010 0 > 4.04% 5 7 L1 hit [k] poll_idle > 3.56% 308 Local RAM hit [k] copy_user_enhanced_f > 2.59% 224 L3 hit [k] copy_user_enhanced_f > 2.12% 184 Local RAM hit [k] copy_user_enhanced_f > 1.54% 1 7 L1 hit [.] __gconv_transform_ut
nice, that looks very usefull
Correct me if I'm wrong, but your current design allows to define just one group, right?
so, current code can do following CPU sorting:
Overhead CPU ........ ... 90% 0 10% 1
and with your changes we could do:
Overhead CPU symbol ........ ... ...... 90% 0 50% krava1 20% krava2 30% krava3
10% 1 50% krava4 50% krava5
I wonder we could go more generic and allow more nested groups, like eg allow group sort on cpu and pid (or more):
Overhead CPU pid symbol ........ ... ... ...... 90% 0 50% 100 50% krava1 20% krava2 30% krava3 50% 110 50% krava1 20% krava2 30% krava3
10% 1 100% 200 50% krava4 50% krava5
I glanced over the changes and I wonder we could do it by chaining hists structs via 'struct hist_entry'
like adding 'struct hists' into 'struct hists_entry' and making the sort_order local for each 'struct hists'
just first thoughts.. need to look at it closely ;-)
jirka
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