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Ingo Molnar 1fc570ad89 perf stat: Add stalled cycles to the default output 
The new default output looks like this:

 Performance counter stats for './loop_1b_instructions':

        236.010686 task-clock               #    0.996 CPUs utilized
                 0 context-switches         #    0.000 M/sec
                 0 CPU-migrations           #    0.000 M/sec
                99 page-faults              #    0.000 M/sec
       756,487,646 cycles                   #    3.205 GHz
       354,938,996 stalled-cycles           #   46.92% of all cycles are idle
     1,001,403,797 instructions             #    1.32  insns per cycle
                                            #    0.35  stalled cycles per insn
       100,279,773 branches                 #  424.895 M/sec
            12,646 branch-misses            #    0.013 % of all branches

        0.236902540  seconds time elapsed

We dropped cache-refs and cache-misses and added stalled-cycles - this is a
more generic "how well utilized is the CPU" metric.

If the stalled-cycles ratio is too high then more specific measurements can be
taken to figure out the source of the inefficiency.

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-pbpl2l4mn797s69bclfpwkwn@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-04-26 20:04:57 +02:00
..
include
perf evsel: Introduce perf_evlist
2011-01-22 19:56:28 -02:00
scripting-engines
perf session: Pass evsel in event_ops->sample()
2011-03-23 19:28:58 -03:00
ui
perf hists browser: Fix seg fault when annotate null symbol
2011-04-15 12:51:49 -03:00
abspath.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
alias.c
…
annotate.c
perf symbols: Rename dso->origin to dso->symtab_type
2011-03-11 13:28:45 -03:00
annotate.h
perf top: Live TUI Annotation
2011-02-22 12:02:07 -03:00
bitmap.c
perf tools: Don't use code surrounded by __KERNEL__
2010-05-02 12:00:44 -03:00
build-id.c
perf session: Pass evsel in event_ops->sample()
2011-03-23 19:28:58 -03:00
build-id.h
perf annotate: Use build-ids to find the right DSO
2010-05-20 12:15:33 -03:00
cache.h
perf tools: Don't fallback to setup_pager unconditionally
2011-01-31 18:08:39 -02:00
callchain.c
perf tools: Kill event_t typedef, use 'union perf_event' instead
2011-01-29 16:25:37 -02:00
callchain.h
perf tools: Kill event_t typedef, use 'union perf_event' instead
2011-01-29 16:25:37 -02:00
cgroup.c
perf: Fix a build error with some GCC versions
2011-04-08 17:40:21 +02:00
cgroup.h
perf tool: Add cgroup support
2011-02-16 13:30:48 +01:00
color.c
perf hist: Replace ->print() routines by ->snprintf() equivalents
2010-04-02 16:28:15 -03:00
color.h
perf hist: Replace ->print() routines by ->snprintf() equivalents
2010-04-02 16:28:15 -03:00
config.c
perf buildid: add perfconfig option to specify buildid cache dir
2010-06-05 09:34:04 -03:00
cpumap.c
perf tools: Add missing cpu_map__delete()
2011-01-22 19:56:30 -02:00
cpumap.h
perf tools: Add missing cpu_map__delete()
2011-01-22 19:56:30 -02:00
ctype.c
perf tools: Move graph_line and graph_dotted_line from top
2009-11-23 21:55:20 +01:00
debug.c
perf tools: Fixup exit path when not able to open events
2011-03-29 13:40:27 -03:00
debug.h
perf tools: Fixup exit path when not able to open events
2011-03-29 13:40:27 -03:00
debugfs.c
perf trace: Clean up find_debugfs()
2009-12-28 10:36:36 +01:00
debugfs.h
perf tools: Mount debugfs automatically
2009-12-28 10:36:36 +01:00
environment.c
…
event.c
perf symbols: Fix vsyscall symbol lookup
2011-03-28 14:44:15 -03:00
event.h
Merge remote branch 'acme/perf/urgent' into perf/core
2011-02-11 11:45:54 -02:00
evlist.c
perf evsel: Fix use of inherit
2011-04-15 12:52:28 -03:00
evlist.h
perf session: Use evlist/evsel for managing perf.data attributes
2011-03-10 11:15:54 -03:00
evsel.c
perf evsel: Fix use of inherit
2011-04-15 12:52:28 -03:00
evsel.h
perf evsel: Fix use of inherit
2011-04-15 12:52:28 -03:00
exec_cmd.c
perf tools: Makefile: Remove various and sundry cruft
2011-02-18 07:43:06 -02:00
exec_cmd.h
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
generate-cmdlist.sh
…
header.c
perf build-id: Add quirk to deal with perf.data file format breakage
2011-03-23 19:29:40 -03:00
header.h
perf header: Stop using 'self'
2011-03-10 11:16:28 -03:00
help.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
help.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
hist.c
perf tools: Improve support for sessions with multiple events
2011-03-06 13:13:40 -03:00
hist.h
perf session: Pass evsel in event_ops->sample()
2011-03-23 19:28:58 -03:00
hweight.c
perf tools: Don't use code surrounded by __KERNEL__
2010-05-02 12:00:44 -03:00
levenshtein.c
…
levenshtein.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
map.c
perf tools: Fix 64 bit integer format strings
2011-01-22 23:41:57 -02:00
map.h
perf probe: Add basic module support
2010-10-21 16:11:44 -02:00
pager.c
…
parse-events.c
perf stat: Add stalled cycles to the default output
2011-04-26 20:04:57 +02:00
parse-events.h
perf script: Add support for H/W and S/W events
2011-03-14 17:07:20 -03:00
parse-options.c
perf options: Type check all the remaining OPT_ variants
2010-05-17 16:22:41 -03:00
parse-options.h
perf options: add OPT_CALLBACK_DEFAULT_NOOPT
2010-12-06 15:33:29 -02:00
path.c
perf tools: add test for strlcpy()
2010-08-21 11:22:47 -03:00
PERF-VERSION-GEN
perf tools: Version incorrect with some versions of grep
2011-03-16 08:59:50 -03:00
probe-event.c
perf probe: Fix multiple --vars options behavior
2011-04-05 15:36:04 -03:00
probe-event.h
perf probe: Add filters support for available functions
2011-01-28 09:20:25 -02:00
probe-finder.c
Merge branch 'perf/urgent' into perf/core
2011-04-19 07:56:17 +02:00
probe-finder.h
perf probe: Add fastpath to do lookup by function name
2011-03-29 13:40:27 -03:00
pstack.c
perf newt: Make <- zoom out filters
2010-05-14 20:05:21 -03:00
pstack.h
perf ui: Move hists browser to util/ui/browsers/
2010-08-10 16:11:08 -03:00
python.c
perf events: Add stalled cycles generic event - PERF_COUNT_HW_STALLED_CYCLES
2011-04-26 20:04:53 +02:00
quote.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
quote.h
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
run-command.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
run-command.h
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
session.c
perf script: improve validation of sample attributes for output fields
2011-04-20 07:27:52 -03:00
session.h
perf script: improve validation of sample attributes for output fields
2011-04-20 07:27:52 -03:00
setup.py
perf tools: Fix NO_NEWT=1 python build error
2011-03-29 16:46:57 -03:00
sigchain.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
sigchain.h
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
sort.c
perf hist: Better displaying of unresolved DSOs and symbols
2010-12-06 15:12:34 -02:00
sort.h
perf: Keep track of the max depth of a callchain
2010-08-22 20:43:17 +02:00
strbuf.c
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
strbuf.h
perf tools: Remove some unused functions
2010-05-18 23:03:35 -03:00
strfilter.c
perf: Fix missing strndup declaration
2011-03-04 01:17:18 +01:00
strfilter.h
perf tools: Add strfilter for general purpose string filter
2011-01-28 09:19:38 -02:00
string.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
strlist.c
perf probe: Fix --del to update current event list
2009-12-15 20:22:01 +01:00
strlist.h
perf tools: Add for_each macros for strlist
2009-12-15 20:22:02 +01:00
svghelper.c
perf timechart: Fix black idle boxes in the title
2011-02-28 08:56:14 +01:00
svghelper.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
symbol.c
perf symbols: Give more useful names to 'self' parameters
2011-04-19 08:18:35 -03:00
symbol.h
perf symbols: Give more useful names to 'self' parameters
2011-04-19 08:18:35 -03:00
thread_map.c
perf threads: Move thread_map to separate file
2011-01-24 10:59:00 -02:00
thread_map.h
perf threads: Move thread_map to separate file
2011-01-24 10:59:00 -02:00
thread.c
perf threads: Move thread_map to separate file
2011-01-24 10:59:00 -02:00
thread.h
perf threads: Move thread_map to separate file
2011-01-24 10:59:00 -02:00
top.c
perf top: Remove redundant syme->origin field
2011-03-11 13:28:45 -03:00
top.h
perf symbol: Move sym_entry->skip to symbol->ignore
2011-03-11 13:36:01 -03:00
trace-event-info.c
perf tools: Introduce event selectors
2011-01-03 16:39:04 -02:00
trace-event-parse.c
perf script: Move printing of 'common' data from print_event and rename
2011-03-14 17:05:55 -03:00
trace-event-read.c
perf: Use read() instead of lseek() in trace_event_read.c:skip()
2010-05-20 08:37:17 +02:00
trace-event-scripting.c
perf session: Pass evsel in event_ops->sample()
2011-03-23 19:28:58 -03:00
trace-event.h
perf session: Pass evsel in event_ops->sample()
2011-03-23 19:28:58 -03:00
types.h
perf tools: Fix 64 bit integer format strings
2011-01-22 23:41:57 -02:00
usage.c
…
util.c
perf util: Move do_read from session to util
2011-01-03 16:50:55 -02:00
util.h
perf tools: Makefile: Remove platform-specific cruft
2011-02-18 07:42:07 -02:00
values.c
perf tools: Fix 64 bit integer format strings
2011-01-22 23:41:57 -02:00
values.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
wrapper.c
perf tools: remove xstrndup, xmalloc, xzalloc
2010-05-18 23:05:28 -03:00
xyarray.c
perf tools: Introduce event selectors
2011-01-03 16:39:04 -02:00
xyarray.h
perf tools: Introduce event selectors
2011-01-03 16:39:04 -02:00