481f988a01
Add stalled cycles accounting and use it to print the "cycles stalled per instruction" value. Also change the unit of the cycles output from M/sec to GHz - this is more intuitive. Prettify the output to: Performance counter stats for './loop_1b_instructions': 239.775036 task-clock # 0.997 CPUs utilized 761,903,912 cycles # 3.178 GHz 356,620,620 stalled-cycles # 46.81% of all cycles are idle 1,001,578,351 instructions # 1.31 insns per cycle # 0.36 stalled cycles per insn 14,782 cache-references # 0.062 M/sec 5,694 cache-misses # 38.520 % of all cache refs 0.240493656 seconds time elapsed Also adjust the --repeat output to make the percentages align vertically: Performance counter stats for './loop_1b_instructions' (10 runs): 236.096793 task-clock # 0.997 CPUs utilized ( +- 0.011% ) 756,553,086 cycles # 3.204 GHz ( +- 0.002% ) 354,942,692 stalled-cycles # 46.92% of all cycles are idle ( +- 0.008% ) 1,001,389,700 instructions # 1.32 insns per cycle # 0.35 stalled cycles per insn ( +- 0.000% ) 10,166 cache-references # 0.043 M/sec ( +- 0.742% ) 468 cache-misses # 4.608 % of all cache refs ( +- 13.385% ) 0.236874136 seconds time elapsed ( +- 0.01% ) Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/n/tip-uapziqny39601apdmmhoz7hk@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu> |
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.. | ||
arch | ||
bench | ||
config | ||
Documentation | ||
python | ||
scripts | ||
util | ||
.gitignore | ||
builtin-annotate.c | ||
builtin-bench.c | ||
builtin-buildid-cache.c | ||
builtin-buildid-list.c | ||
builtin-diff.c | ||
builtin-evlist.c | ||
builtin-help.c | ||
builtin-inject.c | ||
builtin-kmem.c | ||
builtin-kvm.c | ||
builtin-list.c | ||
builtin-lock.c | ||
builtin-probe.c | ||
builtin-record.c | ||
builtin-report.c | ||
builtin-sched.c | ||
builtin-script.c | ||
builtin-stat.c | ||
builtin-test.c | ||
builtin-timechart.c | ||
builtin-top.c | ||
builtin.h | ||
command-list.txt | ||
CREDITS | ||
design.txt | ||
Makefile | ||
MANIFEST | ||
perf-archive.sh | ||
perf.c | ||
perf.h |