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linux/tools/perf
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Namhyung Kim f7fb538afe perf tools: Recalc total periods using top-level entries in hierarchy 
When hierarchy mode is enabled, each entry in a hierarchy level shares
the period.  IOW an upper level entry's period is the sum of lower level
entries.  Thus perf uses only one of them to calculate the total period
of hists.  It was lowest-level (leaf) entries but it has a problem when
it comes to filters.

If a filter is applied, entries in the same level will be filtered or
not.  But upper level entries still have period of their sum including
filtered one.  So total sum of upper level entries will not be same as
sum of lower level entries.

This resulted in entries having more than 100% of overhead and it can be
produced using perf top with filter(s).

Reported-and-Tested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1457531222-18130-8-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-03-10 16:46:13 -03:00
..
arch perf jitdump: Build only on supported archs 2016-03-10 16:33:19 -03:00
bench perf bench mem: Prepare the x86-64 build for upstream memcpy_mcsafe() changes 2016-03-09 10:40:01 +01:00
config perf jitdump: Build only on supported archs 2016-03-10 16:33:19 -03:00
Documentation perf stat: Document --detailed option 2016-03-08 10:11:18 +01:00
jvmti perf jvmti: improve error message in Makefile 2016-02-25 10:43:28 -03:00
python perf python: Support the PERF_RECORD_SWITCH event 2015-10-07 19:41:50 -03:00
scripts perf python scripting: Append examples to err msg about audit-libs-python 2016-02-12 11:30:27 -03:00
tests perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
trace/strace/groups perf trace: Add read/write to the file group 2015-09-04 13:22:06 -03:00
ui perf tools: Remove nr_sort_keys field 2016-03-10 16:46:08 -03:00
util perf tools: Recalc total periods using top-level entries in hierarchy 2016-03-10 16:46:13 -03:00
.gitignore perf tools: Add Intel PT instruction decoder 2015-08-17 11:11:36 -03:00
Build perf tools: Set and pass DOCDIR to builtin-report.c 2016-01-12 12:42:07 -03:00
builtin-annotate.c perf hists: Introduce perf_evsel__output_resort function 2016-02-03 11:13:11 -03:00
builtin-bench.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-buildid-cache.c perf tools: Move timestamp creation to util 2016-01-29 17:30:06 -03:00
builtin-buildid-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-config.c perf config: Add '--system' and '--user' options to select which config file is used 2016-02-12 10:54:46 -03:00
builtin-data.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-diff.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
builtin-evlist.c perf evlist: Add --trace-fields option to show trace fields 2016-01-08 14:23:02 -03:00
builtin-help.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
builtin-inject.c perf jitdump: Build only on supported archs 2016-03-10 16:33:19 -03:00
builtin-kmem.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
builtin-kvm.c perf kvm/powerpc: Port perf kvm stat to powerpc 2016-01-29 17:49:54 -03:00
builtin-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-lock.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-mem.c perf mem: Introduce perf_mem_events__name function 2016-02-24 10:11:52 -03:00
builtin-probe.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-record.c perf record: Ensure return non-zero rc when mmap fail 2016-03-03 11:10:36 -03:00
builtin-report.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
builtin-sched.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-script.c perf script: Remove duplicated code and needless script_spec__findnew() 2016-02-25 16:14:33 -03:00
builtin-stat.c perf stat: Check for frontend stalled for metrics 2016-03-03 11:10:40 -03:00
builtin-timechart.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-top.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
builtin-trace.c perf trace: Check and discard not only 'nr' but also '__syscall_nr' 2016-02-29 11:34:28 -03:00
builtin-version.c perf tools: Move cmd_version() to builtin-version.c 2015-12-09 13:42:03 -03:00
builtin.h perf tools: Add 'perf config' command 2015-11-23 18:31:24 -03:00
command-list.txt perf tools: Do not show trace command if it's not compiled in 2016-01-08 12:46:17 -03:00
CREDITS
design.txt perf tools: Update some code references in design.txt 2014-03-18 18:17:06 -03:00
Makefile perf build tests: Do parallell builds with 'build-test' 2016-02-04 15:57:00 -03:00
Makefile.perf perf build: Add EXTRA_LDFLAGS option to makefile 2016-02-12 11:30:20 -03:00
MANIFEST perf tools: Add missing sources to perf's MANIFEST 2016-01-11 12:09:25 -03:00
perf-archive.sh
perf-completion.sh perf tools: Avoid confusion with preloaded bash function for perf bash completion 2015-03-19 13:53:27 -03:00
perf-read-vdso.c perf tools: Build programs to copy 32-bit compatibility 2014-10-29 10:32:48 -02:00
perf-sys.h perf tools: Move generic barriers out of perf-sys.h 2015-05-08 16:05:08 -03:00
perf-with-kcore.sh perf tools: Fix perf-with-kcore handling of arguments containing spaces 2015-08-06 16:48:27 -03:00
perf.c perf config: Bring perf_default_config to the very beginning at main() 2016-02-26 19:49:16 -03:00
perf.h perf record: Add --all-user/--all-kernel options 2016-02-18 10:48:44 -03:00