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SubjectRe: Support standalone metrics and metric groups for perf
On Thu, Aug 31, 2017 at 12:40:25PM -0700, Andi Kleen wrote:

SNIP

>
> % perf stat -M Summary --metric-only -a sleep 1
>
> Performance counter stats for 'system wide':
>
> Instructions CLKS CPU_Utilization GFLOPs SMT_2T_Utilization Kernel_Utilization
> 317614222.0 1392930775.0 0.0 0.0 0.2 0.1
>
> 1.001497549 seconds time elapsed
>
> % perf stat -M GFLOPs flops
>
> Performance counter stats for 'flops':
>
> 3,999,541,471 fp_comp_ops_exe.sse_scalar_single # 1.2 GFLOPs (66.65%)
> 14 fp_comp_ops_exe.sse_scalar_double (66.65%)
> 0 fp_comp_ops_exe.sse_packed_double (66.67%)
> 0 fp_comp_ops_exe.sse_packed_single (66.70%)
> 0 simd_fp_256.packed_double (66.70%)
> 0 simd_fp_256.packed_single (66.67%)

looks like some events are probably crossing some
output boundaries we have:

[jolsa@krava perf]$ sudo ./perf stat -M SMT -I 1000
# time counts unit events
1.000565706 408,879,985 inst_retired.any # 0.7 CoreIPC (66.68%)
1.000565706 1,120,999,114 cpu_clk_unhalted.thread_any (66.68%)
1.000565706 701,285,312 cycles (66.68%)
1.000565706 1,148,325,740 cpu_clk_unhalted.thread_any # 574162870.0 CORE_CLKS (66.67%)
1.000565706 711,565,247 cpu_clk_unhalted.thread (66.66%)
1.000565706 24,057,590 cpu_clk_thread_unhalted.one_thread_active # 0.3 SMT_2T_Utilization (66.67%)
1.000565706 65,753,475 cpu_clk_thread_unhalted.ref_xclk_any (66.67%)
^C 1.349436822 21,198,385 inst_retired.any # 0.1 CoreIPC (66.70%)
1.349436822 112,740,282 cpu_clk_unhalted.thread_any (66.70%)
1.349436822 84,509,414 cycles (66.70%)
1.349436822 108,181,315 cpu_clk_unhalted.thread_any # 54090657.5 CORE_CLKS (66.62%)
1.349436822 79,700,353 cpu_clk_unhalted.thread (66.61%)
1.349436822 3,911,698 cpu_clk_thread_unhalted.one_thread_active # 0.8 SMT_2T_Utilization (66.69%)
1.349436822 14,739,671 cpu_clk_thread_unhalted.ref_xclk_any (66.69%)


could you please check on that and maybe shift the alignment for the longest name?

thanks,
jirka

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