path: root/tools/perf/Documentation/perf-report.txt
diff options
authorAvi Kivity <>2014-09-13 07:15:05 +0300
committerArnaldo Carvalho de Melo <>2014-09-17 17:08:09 -0300
commit763122ade725592402190f5ff3b8d2edf42b87e8 (patch)
tree1ce5493cc830c0cd23c221665e7c143e668e43ac /tools/perf/Documentation/perf-report.txt
parent29a3ce31c38c8f73f4e076b7ffc0876b4f5dd6c3 (diff)
perf tools: Disable kernel symbol demangling by default
Some Linux symbols (for example __vt_event_wait) are interpreted by the demangler as C++ mangled names, which of course they aren't. Disable kernel symbol demangling by default to avoid this, and allow enabling it with a new option --demangle-kernel for those who wish it. Reported-by: Jiri Olsa <> Signed-off-by: Avi Kivity <> Acked-by: Jiri Olsa <> Cc: Jiri Olsa <> Link: Signed-off-by: Arnaldo Carvalho de Melo <>
Diffstat (limited to 'tools/perf/Documentation/perf-report.txt')
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index d561e0214f52..0927bf4e6c2a 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -276,6 +276,9 @@ OPTIONS
Demangle symbol names to human readable form. It's enabled by default,
disable with --no-demangle.
+ Demangle kernel symbol names to human readable form (for C++ kernels).
Use the data addresses of samples in addition to instruction addresses
to build the histograms. To generate meaningful output, the