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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/tools/perf/util
История
Frederic Weisbecker 301fde27c7 perf: Fix orphan callchain branches 
Callchains have markers inside their capture to tell we
enter a context (kernel, user, ...).

Those are not displayed in the callchains but they are
incidentally an active part of the radix tree where
callchains are stored, just like any other address.

If we have the two following callchains:

addr1 -> addr2 -> user context -> addr3
addr1 -> addr2 -> user context -> addr4
addr1 -> addr2 -> addr 5

This is pretty common if addr1 and addr2 are part of an
interrupt path, addr3 and addr4 are user addresses and
addr5 is a kernel non interrupt path.

This will be stored as follows in the tree:

                   addr1
                   addr2
                   /   \
                  /     addr5
            user context
               /    \
             addr3  addr4

But we ignore the context markers in the report, hence
the addr3 and addr4 will appear as orphan branches:

    |--28.30%-- hrtimer_interrupt
    |          smp_apic_timer_interrupt
    |          apic_timer_interrupt
    |          |           <------------- here, no parent!
    |          |          |
    |          |          |--11.11%-- 0x7fae7bccb875
    |          |          |
    |          |          |--11.11%-- 0xffffffffff60013b
    |          |          |
    |          |          |--11.11%-- __pthread_mutex_lock_internal
    |          |          |
    |          |          |--11.11%-- __errno_location

Fix this by removing the context markers when we process the
callchains to the tree.

Reported-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1269274173-20328-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 		2010-03-22 18:47:34 +01:00
..
include perf tools: Use eprintf for pr_{err,warning,info} too 2010-03-12 10:28:36 +01:00
scripting-engines perf/scripts: Remove unnecessary PyTuple resizes 2010-02-25 04:07:49 +01:00
PERF-VERSION-GEN perf tools: Bump version to 0.0.2 2009-10-16 10:34:28 +02:00
abspath.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
alias.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
build-id.c perf build-id: Move the routine to find DSOs with hits to the lib 2010-02-04 09:33:26 +01:00
build-id.h perf build-id: Move the routine to find DSOs with hits to the lib 2010-02-04 09:33:26 +01:00
cache.h perf report: Implement initial UI using newt 2010-03-12 10:28:46 +01:00
callchain.c perf: Fix orphan callchain branches 2010-03-22 18:47:34 +01:00
callchain.h perf: Fix orphan callchain branches 2010-03-22 18:47:34 +01:00
color.c perf report: Implement initial UI using newt 2010-03-12 10:28:46 +01:00
color.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
config.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
cpumap.c perf tools: Fix sparse CPU numbering related bugs 2010-03-11 13:36:53 +01:00
cpumap.h perf tools: Fix sparse CPU numbering related bugs 2010-03-11 13:36:53 +01:00
ctype.c perf tools: Move graph_line and graph_dotted_line from top 2009-11-23 21:55:20 +01:00
debug.c perf report: Implement initial UI using newt 2010-03-12 10:28:46 +01:00
debug.h perf tools: Fix non-newt build 2010-03-13 08:23:37 +01:00
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 perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
event.c Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-02-28 10:20:25 -08:00
event.h perf session: Add storage for seperating event types in report 2010-03-10 13:53:48 +01:00
exec_cmd.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
exec_cmd.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
generate-cmdlist.sh perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
header.c perf tools: Clean up O_LARGEFILE et al usage 2010-02-04 10:03:03 +01:00
header.h perf buildid-cache: Add new command to manage build-id cache 2010-01-21 08:31:29 +01:00
help.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
help.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
hist.c perf: Fix orphan callchain branches 2010-03-22 18:47:34 +01:00
hist.h perf report: Implement initial UI using newt 2010-03-12 10:28:46 +01:00
levenshtein.c perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
levenshtein.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
map.c perf symbols: Improve debugging information about symtab origins 2010-02-25 12:27:17 +01:00
map.h perf symbols: Improve debugging information about symtab origins 2010-02-25 12:27:17 +01:00
newt.c perf annotate: Properly notify the user that vmlinux is missing 2010-03-15 17:16:25 +01:00
pager.c perf_counter tools: Remove dead code 2009-06-27 06:06:39 +02:00
parse-events.c perf: Add attr->precise support to raw event parsing 2010-03-10 13:23:32 +01:00
parse-events.h perf trace: Add filter Suppport 2009-10-15 11:35:23 +02:00
parse-options.c perf tools: Align long options which have no short forms 2009-12-10 08:30:28 +01:00
parse-options.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
path.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
probe-event.c perf events: Fix false positive build warning with older GCC's 2010-03-18 17:03:24 +01:00
probe-event.h perf probe: Add data structure member access support 2010-03-17 12:11:15 +01:00
probe-finder.c perf probe: Add data structure member access support 2010-03-17 12:11:15 +01:00
probe-finder.h perf probe: List probes with line number and file name 2010-03-17 11:32:32 +01:00
quote.c perf: Fix read buffer overflow 2009-08-04 11:09:56 +02:00
quote.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
run-command.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
run-command.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
session.c perf session: Add storage for seperating event types in report 2010-03-10 13:53:48 +01:00
session.h perf report: Implement initial UI using newt 2010-03-12 10:28:46 +01:00
sigchain.c perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
sigchain.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
sort.c perf diff: Use perf_session__fprintf_hists just like 'perf record' 2009-12-16 16:53:37 +01:00
sort.h perf diff: Use perf_session__fprintf_hists just like 'perf record' 2009-12-16 16:53:37 +01:00
strbuf.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
strbuf.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
string.c perf probe: Add lazy line matching support 2010-02-25 17:49:30 +01:00
string.h perf probe: Add lazy line matching support 2010-02-25 17:49:30 +01:00
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 Merge branch 'perf/urgent' into perf/core 2010-03-17 11:31:48 +01:00
symbol.h Merge branch 'perf/urgent' into perf/core 2010-03-17 11:31:48 +01:00
thread.c perf events: Change perf parameter --pid to process-wide collection instead of thread-wide 2010-03-18 16:21:12 +01:00
thread.h perf events: Change perf parameter --pid to process-wide collection instead of thread-wide 2010-03-18 16:21:12 +01:00
trace-event-info.c perf tools: Convert getpagesize() uses to sysconf(_SC_GETPAGESIZE) 2010-01-16 10:58:46 +01:00
trace-event-parse.c perf/scripts: Move common code out of Perl-specific files 2010-02-23 20:37:29 +01:00
trace-event-read.c perf tools: Clean up O_LARGEFILE et al usage 2010-02-04 10:03:03 +01:00
trace-event-scripting.c perf/scripts: Add Python scripting engine 2010-02-25 04:07:29 +01:00
trace-event.h perf/scripts: Add Python scripting engine 2010-02-25 04:07:29 +01:00
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: Fix implicit declaration of getline in util.c 2010-01-17 07:53:09 +01:00
util.h perf tools: Introduce xzalloc() for detecting out of memory conditions 2010-03-17 11:32:29 +01:00
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 unused wrapper routines 2009-11-24 16:37:03 +01:00