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authorSam Liao <phyomh@gmail.com>2011-06-07 23:49:46 +0800
committerFrederic Weisbecker <fweisbec@gmail.com>2011-06-30 00:24:30 +0200
commitd797fdc5c5c245fbb05f553e68cb95d962fbdd01 (patch)
treeaa28d98f61df71a2fba55e2b4b526c77aec8de0a /tools/perf/Documentation
parentaf07ce3e77d3b24ab1d71fcc5833d41800f23b2b (diff)
perf tools: Add inverted call graph report support.
Add "caller/callee" option to support inverted butterfly report, in the inverted report (with caller option), the call graph start from the callee's ancestor. Users can use such view to catch system's performance bottleneck from a sysprof like view. Using this option with specified sort order like pid gives us high level view of call graph statistics. Also add "-G" alias for inverted call graph. Signed-off-by: Sam Liao <phyomh@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Stephane Eranian <eranian@google.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-report.txt15
1 files changed, 12 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 8ba03d6e539..cfa8e513d0f 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -80,15 +80,24 @@ OPTIONS
--dump-raw-trace::
Dump raw trace in ASCII.
--g [type,min]::
+-g [type,min,order]::
--call-graph::
- Display call chains using type and min percent threshold.
+ 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. +
- Default: fractal,0.5.
+
+ order can be either:
+ - callee: callee based call graph.
+ - caller: inverted caller based call graph.
+
+ Default: fractal,0.5,callee.
+
+-G::
+--inverted::
+ alias for inverted caller based call graph.
--pretty=<key>::
Pretty printing style. key: normal, raw