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perf stat: Always separate stalled cycles per insn
The "stalled cycles per insn" is appended to "instructions" when the CPU has this hardware counter directly. We should always make it a separate line, which also aligns to the output when we hit the "if (total && avg)" branch. Before: $ sudo perf stat --all-cpus --field-separator , --log-fd 1 -einstructions,cycles -- sleep 1 4565048704,,instructions,64114578096,100.00,1.34,insn per cycle,, 3396325133,,cycles,64146628546,100.00,, After: $ sudo ./tools/perf/perf stat --all-cpus --field-separator , --log-fd 1 -einstructions,cycles -- sleep 1 6721924,,instructions,24026790339,100.00,0.22,insn per cycle ,,,,,0.00,stalled cycles per insn 30939953,,cycles,24025512526,100.00,, Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20190517221039.8975-1-xiyou.wangcong@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -819,7 +819,8 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
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"stalled cycles per insn",
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ratio);
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} else if (have_frontend_stalled) {
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print_metric(config, ctxp, NULL, NULL,
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out->new_line(config, ctxp);
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print_metric(config, ctxp, NULL, "%7.2f ",
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"stalled cycles per insn", 0);
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}
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} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) {
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