Namhyung Kim a1f3d56761 perf stat: Use cpu-clock event for cpu targets ... Currently 'perf stat' always counts task-clock event by default. But it's somewhat confusing for system-wide targets (especially with 'sleep N' as the 'sleep' task just sleeps and doesn't use cputime). Changing to cpu-clock event instead for that case makes more sense IMHO. Before: # perf stat -a sleep 0.1 Performance counter stats for 'system wide': 403.038603 task-clock (msec) # 4.001 CPUs utilized 150 context-switches # 0.372 K/sec 7 cpu-migrations # 0.017 K/sec 71 page-faults # 0.176 K/sec 23,705,169 cycles # 0.059 GHz 15,888,166 instructions # 0.67 insn per cycle 3,326,078 branches # 8.253 M/sec 87,643 branch-misses # 2.64% of all branches 0.100737009 seconds time elapsed # After: # perf stat -a sleep 0.1 Performance counter stats for 'system wide': 404.271182 cpu-clock (msec) # 4.000 CPUs utilized 143 context-switches # 0.354 K/sec 13 cpu-migrations # 0.032 K/sec 73 page-faults # 0.181 K/sec 22,119,220 cycles # 0.055 GHz 13,622,065 instructions # 0.62 insn per cycle 2,918,769 branches # 7.220 M/sec 85,033 branch-misses # 2.91% of all branches 0.101073089 seconds time elapsed # Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1463119263-5569-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2016-05-16 23:11:47 -03:00
..
Documentation	perf record: Disable buildid cache options by default in switch output mode	2016-04-28 09:58:59 -03:00
arch	perf symbols: Fix kallsyms perf test on ppc64le	2016-05-05 21:04:03 -03:00
bench	perf bench: Remove one more die() call	2016-04-26 13:28:40 -03:00
config	perf tools: Build syscall table .c header from kernel's syscall_64.tbl	2016-04-08 09:58:14 -03:00
jvmti	perf jit: Add support for using TSC as a timestamp	2016-04-01 18:42:55 -03:00
python	…
scripts	perf script: Update export-to-postgresql to support callchain export	2016-05-06 13:00:55 -03:00
tests	perf tests: Add test to check backward ring buffer	2016-05-09 18:11:22 -03:00
trace	perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/	2016-05-11 13:06:00 -03:00
ui	perf hists: Move sort__has_comm into struct perf_hpp_list	2016-05-05 21:04:02 -03:00
util	perf stat: Update runtime using cpu-clock event	2016-05-16 23:11:46 -03:00
.gitignore	…
Build	…
CREDITS	…
MANIFEST	perf bench: Fix detached tarball building due to missing 'perf bench memcpy' headers	2016-03-24 12:28:57 -03:00
Makefile	perf build tests: Do parallell builds with 'build-test'	2016-02-04 15:57:00 -03:00
Makefile.perf	perf tools: Build syscall table .c header from kernel's syscall_64.tbl	2016-04-08 09:58:14 -03:00
builtin-annotate.c	perf machine: Rename perf_event__preprocess_sample to machine__resolve	2016-03-23 12:03:08 -03:00
builtin-bench.c	…
builtin-buildid-cache.c	…
builtin-buildid-list.c	…
builtin-config.c	perf config: Make show_config() use perf_config_set	2016-04-14 09:15:47 -03:00
builtin-data.c	…
builtin-diff.c	perf hists: Move sort__need_collapse into struct perf_hpp_list	2016-05-05 21:03:58 -03:00
builtin-evlist.c	…
builtin-help.c	perf help: Make check_emacsclient_version to check strbuf APIs	2016-05-10 11:56:14 -03:00
builtin-inject.c	perf tools: Add time conversion event	2016-03-31 10:52:24 -03:00
builtin-kmem.c	perf callchain: Start moving away from global per thread cursors	2016-04-14 14:48:07 -03:00
builtin-kvm.c	perf evsel: Do not use globals in config()	2016-04-11 22:18:20 -03:00
builtin-list.c	…
builtin-lock.c	…
builtin-mem.c	perf mem: Add -U/-K (--all-user/--all-kernel) options	2016-03-30 11:14:07 -03:00
builtin-probe.c	…
builtin-record.c	perf record: Generate tracking events for process forked by perf	2016-04-28 09:58:59 -03:00
builtin-report.c	perf hists: Move sort__has_parent into struct perf_hpp_list	2016-05-05 21:03:59 -03:00
builtin-sched.c	perf sched map: Display only given cpus	2016-04-13 10:11:52 -03:00
builtin-script.c	perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack	2016-04-27 10:29:07 -03:00
builtin-stat.c	perf stat: Use cpu-clock event for cpu targets	2016-05-16 23:11:47 -03:00
builtin-timechart.c	perf machine: Rename perf_event__preprocess_sample to machine__resolve	2016-03-23 12:03:08 -03:00
builtin-top.c	perf hists: Move sort__has_socket into struct perf_hpp_list	2016-05-05 21:04:01 -03:00
builtin-trace.c	perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/	2016-05-11 13:06:00 -03:00
builtin-version.c	…
builtin.h	perf tools: Remove needless 'extern' from function prototypes	2016-03-23 15:06:35 -03:00
command-list.txt	…
design.txt	…
perf-archive.sh	…
perf-completion.sh	…
perf-read-vdso.c	…
perf-sys.h	…
perf-with-kcore.sh	…
perf.c	perf tools: Make alias handler to check return value of strbuf	2016-05-10 11:56:52 -03:00
perf.h	perf tools: Ditch record_opts.callgraph_set	2016-04-18 12:26:27 -03:00