Hi,
$ perf record -e 'cpi{cycles,instructions}' noploop 5
$ perf report --stdio --group
# group: ^P^Q<A0>\{cycles,instructions}
# ========
#
# Samples: 39K of event '^P^Q<A0>\ { cycles, instructions }'
# Event count (approx.): 37782563692
#
# Overhead Command Shared Object Symbol
# ................ ....... ................. ...........................
#
99.91% 99.98% noploop noploop [.] main
0.06% -nan% noploop [kernel.kallsyms] [k] read_hpet
0.01% 0.01% noploop [kernel.kallsyms] [k] __acct_update_integrals
0.01% -nan% noploop [kernel.kallsyms] [k] raise_softirq
0.01% -nan% noploop [kernel.kallsyms] [k] apic_timer_interrupt
0.01% -nan% noploop [kernel.kallsyms] [k] __do_softirq
0.01% -nan% noploop [kernel.kallsyms] [k] common_interrupt
0.00% 0.00% noploop [kernel.kallsyms] [k] intel_pmu_enable_all
0.00% 0.01% noploop [kernel.kallsyms] [k] cpuacct_account_field
0.00% 0.01% noploop [kernel.kallsyms] [k] __local_bh_enable
1. The group name is garbage if not anonymous group.
2. arithmetic error in the overhead columns leading to NaN.
3. I assume the Overhead column order is the group event order. Is that right?
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