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Diffstat (limited to 'simpleperf/README.md')
| -rw-r--r-- | simpleperf/README.md | 6 |
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diff --git a/simpleperf/README.md b/simpleperf/README.md index 5412f906..5700c8aa 100644 --- a/simpleperf/README.md +++ b/simpleperf/README.md @@ -582,6 +582,12 @@ but not well on arm). angler:/data/data/com.example.sudogame $./simpleperf record -p 10324 --call-graph fp --symfs . --duration 30 simpleperf I 01-01 10:03:58 11267 11267 cmd_record.cpp:341] Samples recorded: 56736. Samples lost: 0. +**Recording stack frame based call graph doesn't work well on arm architecture,** +**even if compiled using -O0 -g -fno-omit-frame-pointer options. It is because** +**the kernel can't unwind user stack containing both arm/thumb code. So please** +**consider using dwarf based call graph on arm architecture, or profiling in** +**aarch64 environment.** + #### Report call graph Report accumulated period. In the table below, the first column is “Children”, it is the cpu cycle percentage of a function and functions called by that |