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Frederic Weisbecker 5225c45899 perf: Initialize callchains roots's childen hits 
Each histogram entry has a callchain root that stores the
callchain samples. However we forgot to initialize the
tracking of children hits of these roots, which then got
random values on their creation.

The root children hits is multiplied by the minimum percentage
of hits provided by the user, and the result becomes the minimum
hits expected from children branches. If the random value due
to the uninitialization is big enough, then this minimum number
of hits can be huge and eventually filter every children branches.

The end result was invisible callchains. All we need to
fix this is to initialize the children hits of the root.

Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: 2.6.32.x-2.6.35.y <stable@kernel.org>
2010-08-27 01:51:36 +02:00
..
include perf: Add back list_head data types 2010-08-12 21:50:00 +02:00
scripting-engines perf scripts python: Give field dict to unhandled callback 2010-06-01 06:12:35 -03:00
ui perf annotate tui: Fix exit and RIGHT keys handling 2010-08-16 10:43:54 -03:00
abspath.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
alias.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
bitmap.c perf tools: Don't use code surrounded by __KERNEL__ 2010-05-02 12:00:44 -03:00
build-id.c perf tools: Release thread resources on PERF_RECORD_EXIT 2010-07-30 18:28:42 -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 buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
callchain.c Merge branch 'linus' into perf/core 2010-07-21 21:43:06 +02:00
callchain.h perf: Initialize callchains roots's childen hits 2010-08-27 01:51:36 +02:00
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 the ability to specify list of cpus to monitor 2010-06-05 09:33:01 -03:00
cpumap.h perf tools: Add the ability to specify list of cpus to monitor 2010-06-05 09:33:01 -03:00
ctype.c perf tools: Move graph_line and graph_dotted_line from top 2009-11-23 21:55:20 +01:00
debug.c perf ui: Complete the breakdown of util/newt.c 2010-08-10 16:11:38 -03:00
debug.h perf ui: Complete the breakdown of util/newt.c 2010-08-10 16:11:38 -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: expose event__process function 2010-08-04 12:41:23 -03:00
event.h perf: expose event__process function 2010-08-04 12:41:23 -03:00
exec_cmd.c perf tools: remove xstrndup, xmalloc, xzalloc 2010-05-18 23:05:28 -03:00
exec_cmd.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
generate-cmdlist.sh
header.c perf record: Add option to avoid updating buildid cache 2010-06-17 10:20:44 -03:00
header.h perf/live: don't synthesize build ids at the end of a live mode trace 2010-05-02 12:04:05 -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 annotate: Sort by hottest lines in the TUI 2010-08-10 16:11:42 -03:00
hist.h perf annotate: Sort by hottest lines in the TUI 2010-08-10 16:11:42 -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: Don't keep unreferenced maps when unmaps are detected 2010-08-02 19:45:23 -03:00
map.h perf tools: Don't keep unreferenced maps when unmaps are detected 2010-08-02 19:45:23 -03:00
pager.c perf_counter tools: Remove dead code 2009-06-27 06:06:39 +02:00
parse-events.c perf: Don't use 4 bytes as a default instruction breakpoint length 2010-06-24 23:35:49 +02:00
parse-events.h perf: record TRACE_INFO only if using tracepoints and SAMPLE_RAW 2010-05-03 10:31:48 -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: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
path.c perf tools: remove xstrndup, xmalloc, xzalloc 2010-05-18 23:05:28 -03:00
PERF-VERSION-GEN perf: Version String fix, for fallback if not from git 2010-07-05 10:42:58 +02:00
probe-event.c perf probe: Fix memory leaks in add_perf_probe_events 2010-08-06 16:25:56 -03:00
probe-event.h perf probe: Rename common fields/functions from kprobe to probe. 2010-07-30 12:01:38 -03:00
probe-finder.c perf probe: Fix to copy the type for raw parameters 2010-08-06 16:25:56 -03:00
probe-finder.h perf probe: Rename common fields/functions from kprobe to probe. 2010-07-30 12:01:38 -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
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 session: Invalidate last_match when removing threads from rb_tree 2010-08-02 19:01:09 -03:00
session.h perf session: Remove threads from tree on PERF_RECORD_EXIT 2010-06-17 08:37:44 -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 hists: Fixup addr snprintf width on 32 bit arches 2010-08-05 19:38:01 -03:00
sort.h perf ui: New hists tree widget 2010-07-27 11:24:31 -03:00
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
string.c perf: Swap inclusion order of util.h and string.h in util/string.c 2010-04-04 16:40:42 +02:00
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: Improve the visual appearance of scheduler delays 2009-10-20 03:39:21 +02:00
svghelper.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
symbol.c perf symbols: Ignore mapping symbols on ARM 2010-08-10 16:10:36 -03:00
symbol.h perf symbols: Store the symbol binding 2010-08-05 19:38:01 -03:00
thread.c perf tools: Release thread resources on PERF_RECORD_EXIT 2010-07-30 18:28:42 -03:00
thread.h perf tools: Release thread resources on PERF_RECORD_EXIT 2010-07-30 18:28:42 -03:00
trace-event-info.c perf/record: simplify TRACE_INFO tracepoint check 2010-05-05 11:12:53 -03:00
trace-event-parse.c Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-18 08:19:03 -07:00
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/scripts: Add Python scripting engine 2010-02-25 04:07:29 +01:00
trace-event.h perf: Fix unaligned accesses while fetching trace values 2010-05-20 11:21:57 +02:00
types.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
usage.c perf top: Fall back to cpu-clock-tick hrtimer sampling if no cycle counter available 2009-06-07 17:31:52 +02:00
util.c perf report: Report number of events, not samples 2010-05-14 14:19:35 -03:00
util.h perf record: Add option to avoid updating buildid cache 2010-06-17 10:20:44 -03:00
values.c perf: Fix memory leak: counterwidth 2010-01-13 10:09:15 +01:00
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