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Diffstat (limited to 'tools/perf/Documentation/perf-report.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index e4fdeeb51123..ab1fd64e3627 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -169,30 +169,40 @@ OPTIONS --dump-raw-trace:: Dump raw trace in ASCII. --g [type,min[,limit],order[,key][,branch]]:: ---call-graph:: - Display call chains using type, min percent threshold, optional print - limit and order. - type can be either: +-g:: +--call-graph=<print_type,threshold[,print_limit],order,sort_key,branch>:: + Display call chains using type, min percent threshold, print limit, + call order, sort key and branch. Note that ordering of parameters is not + fixed so any parement can be given in an arbitraty order. One exception + is the print_limit which should be preceded by threshold. + + print_type can be either: - flat: single column, linear exposure of call chains. - - graph: use a graph tree, displaying absolute overhead rates. + - graph: use a graph tree, displaying absolute overhead rates. (default) - fractal: like graph, but displays relative rates. Each branch of - the tree is considered as a new profiled object. + + the tree is considered as a new profiled object. + - none: disable call chain display. + + threshold is a percentage value which specifies a minimum percent to be + included in the output call graph. Default is 0.5 (%). + + print_limit is only applied when stdio interface is used. It's to limit + number of call graph entries in a single hist entry. Note that it needs + to be given after threshold (but not necessarily consecutive). + Default is 0 (unlimited). order can be either: - callee: callee based call graph. - caller: inverted caller based call graph. + Default is 'caller' when --children is used, otherwise 'callee'. - key can be: - - function: compare on functions + sort_key can be: + - function: compare on functions (default) - address: compare on individual code addresses branch can be: - - branch: include last branch information in callgraph - when available. Usually more convenient to use --branch-history - for this. - - Default: graph,0.5,caller + - branch: include last branch information in callgraph when available. + Usually more convenient to use --branch-history for this. --children:: Accumulate callchain of children to parent entry so that then can |