WSL2-Linux-Kernel/tools/perf
Frederic Weisbecker b0efe213f8 perf tools: callchain: Fix spurious 'perf report' warnings: ignore empty callchains
When the callchain tree comes to insert an empty backtrace, it
raises a spurious warning about the fact we are inserting an
empty. This is spurious because the radix tree assumes it did
something wrong to reach this state. But it didn't, we just met
an empty callchain that has to be ignored.

This happens occasionally with certain types of call-chain
recordings. If it happens it's a big nuisance as perf report
output starts with thousands of warning lines.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1249690585-9145-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-09 12:54:41 +02:00
..
Documentation perf stat: Fix tool option consistency: rename -S/--scale to -c/--scale 2009-08-09 12:54:37 +02:00
util perf tools: callchain: Fix spurious 'perf report' warnings: ignore empty callchains 2009-08-09 12:54:41 +02:00
.gitignore perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
CREDITS perf_counter tools: Add CREDITS file for Git contributors 2009-06-24 19:54:29 +02:00
Makefile perf: Auto-detect libelf 2009-08-06 20:25:13 +02:00
builtin-annotate.c perf_counter: PERF_SAMPLE_ID and inherited counters 2009-07-22 18:05:56 +02:00
builtin-help.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
builtin-list.c perf_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00
builtin-record.c perf record: Fix the -A UI for empty or non-existent perf.data 2009-08-09 12:54:40 +02:00
builtin-report.c perf report: Add debug help for the finding of symbol bugs - show the symtab origin (DSO, build-id, kernel, etc) 2009-08-09 12:54:36 +02:00
builtin-stat.c perf stat: Fix tool option consistency: rename -S/--scale to -c/--scale 2009-08-09 12:54:37 +02:00
builtin-top.c perf top: Improve interactive key handling 2009-08-09 12:54:31 +02:00
builtin.h perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
command-list.txt perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
design.txt perf_counter: Start documenting HAVE_PERF_COUNTERS requirements 2009-06-12 19:37:30 +02:00
perf.c perf_counter: Detect debugfs location 2009-07-22 18:05:57 +02:00
perf.h Merge branch 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf 2009-07-22 11:41:56 -07:00