Re: [PATCH v3 06/11] perf, tools, stat: Support JSON metrics in perf stat

[Arnaldo Carvalho de Melo]

Em Tue, Sep 05, 2017 at 03:09:19PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Sep 04, 2017 at 10:37:25AM -0700, Andi Kleen escreveu:
> > On Mon, Sep 04, 2017 at 02:11:28PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Thu, Aug 31, 2017 at 12:40:31PM -0700, Andi Kleen escreveu:
> > > > The actual JSON metrics are in a separate pull request.
> > > 
> > > Yeah, I noticed when trying to test it :-\
> > > 
> > > Was this pull req submitted?
> > 
> > Not yet. I was waiting to finish review.
> > 
> > It makes perf crash until you apply the metricgroup patchkit first.
> > 
> > But you can get it here
> > 
> > git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git perf/intel-json-metrics-2
> 
> Ok, so I tried installing the Broadwell ones (one of my test machines)
> and got into:
> 
> [root@jouet ~]# perf stat -M Pipeline flops
> bpf: builtin compilation failed: -95, try external compiler


So there is no 'flops' binary here, unsure if the problem is related to
that, if so, we need a fix.

But that doesn't seem to be the case, as with a metric that works I get
a sensible error message:

[root@jouet ~]# perf stat -M Memory_BW --metric-only -a flops
Workload failed: No such file or directory
[root@jouet ~]#

Anyway, testing with some other metric I got some results:

[root@jouet ~]# perf stat -M FLOPS --metric-only -a sleep 1
Cannot set up events {fp_arith_inst_retired.scalar_single,fp_arith_inst_retired.scalar_double,fp_arith_inst_retired.128b_packed_double,fp_arith_inst_retired.128b_packed_single,fp_arith_inst_retired.256b_packed_double,fp_arith_inst_retired.256b_packed_single,duration_time}:W

 Usage: perf stat [<options>] [<command>]

    -M, --metrics <metric/metric group list>
                          monitor specified metrics or metric groups (separated by ,)
[root@jouet ~]# perf stat -M Memory_BW --metric-only -a sleep 1

 Performance counter stats for 'system wide':

MLP                  
     2.9            

       1.001544615 seconds time elapsed

[root@jouet ~]# 


> ERROR: problems with path cpu/uops_executed.c: No such file or directory
> Cannot set up events {uops_retired.retire_slots,inst_retired.any}:W,{inst_retired.any,cycles}:W,{uops_executed.thread,cpu/uops_executed.core,cmask=1/,uops_executed.cycles_ge_1_uop_exec}:W
> 
>  Usage: perf stat [<options>] [<command>]
> 
>     -M, --metrics <metric/metric group list>
>                           monitor specified metrics or metric groups (separated by ,)
> [root@jouet ~]# perf stat -M Pipeline flops
> 
> 
> Wasn't this already fixed?
> 
> This is with these patches applied:
> 
> [acme@jouet linux]$ git log --oneline -5
> 5e6bf24a1929 (HEAD) perf stat: Support JSON metrics in perf stat
> b1e1f50913c8 perf pmu: Extract function to get JSON alias map
> af8aca46b528 perf stat: Print generic metric header even for failed expressions
> 15669491ee54 perf stat: Factor out generic metric printing
> 7d8900f2984c perf vendor events: Support metric_group and no event name in JSON parser
> [acme@jouet linux]$ git log --oneline -10
> 5e6bf24a1929 (HEAD) perf stat: Support JSON metrics in perf stat
> b1e1f50913c8 perf pmu: Extract function to get JSON alias map
> af8aca46b528 perf stat: Print generic metric header even for failed expressions
> 15669491ee54 perf stat: Factor out generic metric printing
> 7d8900f2984c perf vendor events: Support metric_group and no event name in JSON parser
> 8f6ea3aac2e2 perf tools: Support weak groups in 'perf stat'
> b5ef5ea5e8ed perf sched timehist: Add pid and tid options
> eba9fac01761 (tag: perf-core-for-mingo-4.14-20170901, acme/perf/core) perf annotate browser: Help for cycling thru hottest instructions with TAB/shift+TAB
> 63ce8449bc10 perf stat: Only auto-merge events that are PMU aliases
> fc33dccba395 perf test: Add test case for PERF_SAMPLE_PHYS_ADDR
> [acme@jouet linux]$ 
> 
> Will try with all of them...
> 
> - Arnaldo