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| author | Ingo Molnar <mingo@kernel.org> | 2013-10-29 11:23:32 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-29 11:23:32 +0100 |
| commit | aac898548d04c7bff179b79f805874b0d6f87571 (patch) | |
| tree | e8de975fd5de6c95bf4329861a872dbcfe0c7ead /tools/perf/Documentation | |
| parent | 2f5e98802350627ad6f2e3cee4d177059fc0c2f2 (diff) | |
| parent | cd65718712469ad844467250e8fad20a5838baae (diff) | |
| download | op-kernel-dev-aac898548d04c7bff179b79f805874b0d6f87571.zip op-kernel-dev-aac898548d04c7bff179b79f805874b0d6f87571.tar.gz | |
Merge branch 'perf/urgent' into perf/core
Conflicts:
tools/perf/builtin-record.c
tools/perf/builtin-top.c
tools/perf/util/hist.h
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 14 | ||||
| -rw-r--r-- | tools/perf/Documentation/perf-top.txt | 18 |
2 files changed, 18 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index f10ab63..052f7c4 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -92,8 +92,20 @@ OPTIONS size is rounded up to have nearest pages power of two value. -g:: + Enables call-graph (stack chain/backtrace) recording. + --call-graph:: - Do call-graph (stack chain/backtrace) recording. + Setup and enable call-graph (stack chain/backtrace) recording, + implies -g. + + Allows specifying "fp" (frame pointer) or "dwarf" + (DWARF's CFI - Call Frame Information) as the method to collect + the information used to show the call graphs. + + In some systems, where binaries are build with gcc + --fomit-frame-pointer, using the "fp" method will produce bogus + call graphs, using "dwarf", if available (perf tools linked to + the libunwind library) should be used instead. -q:: --quiet:: diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index c16a09e..7de01dd 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -143,20 +143,12 @@ Default is to monitor all CPUS. --asm-raw:: Show raw instruction encoding of assembly instructions. --G [type,min,order]:: +-G:: + Enables call-graph (stack chain/backtrace) recording. + --call-graph:: - Display call chains using type, min percent threshold and order. - type can be either: - - flat: single column, linear exposure of call chains. - - graph: use a graph tree, displaying absolute overhead rates. - - fractal: like graph, but displays relative rates. Each branch of - the tree is considered as a new profiled object. - - order can be either: - - callee: callee based call graph. - - caller: inverted caller based call graph. - - Default: fractal,0.5,callee. + Setup and enable call-graph (stack chain/backtrace) recording, + implies -G. --max-stack:: Set the stack depth limit when parsing the callchain, anything |
