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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:22 +0000
commitb20732900e4636a467c0183a47f7396700f5f743 (patch)
tree42f079ff82e701ebcb76829974b4caca3e5b6798 /tools/perf/Documentation/perf-top.txt
parentAdding upstream version 6.8.12. (diff)
downloadlinux-b20732900e4636a467c0183a47f7396700f5f743.tar.xz
linux-b20732900e4636a467c0183a47f7396700f5f743.zip
Adding upstream version 6.9.7.upstream/6.9.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/Documentation/perf-top.txt')
-rw-r--r--tools/perf/Documentation/perf-top.txt32
1 files changed, 31 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 3c202ec080..a754875fa5 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -261,8 +261,38 @@ Default is to monitor all CPUS.
--raw-trace::
When displaying traceevent output, do not use print fmt or plugins.
+-H::
--hierarchy::
- Enable hierarchy output.
+ Enable hierarchical output. In the hierarchy mode, each sort key groups
+ samples based on the criteria and then sub-divide it using the lower
+ level sort key.
+
+ For example, in normal output:
+
+ perf report -s dso,sym
+ #
+ # Overhead Shared Object Symbol
+ # ........ ................. ...........
+ 50.00% [kernel.kallsyms] [k] kfunc1
+ 20.00% perf [.] foo
+ 15.00% [kernel.kallsyms] [k] kfunc2
+ 10.00% perf [.] bar
+ 5.00% libc.so [.] libcall
+
+ In hierarchy output:
+
+ perf report -s dso,sym --hierarchy
+ #
+ # Overhead Shared Object / Symbol
+ # .......... ......................
+ 65.00% [kernel.kallsyms]
+ 50.00% [k] kfunc1
+ 15.00% [k] kfunc2
+ 30.00% perf
+ 20.00% [.] foo
+ 10.00% [.] bar
+ 5.00% libc.so
+ 5.00% [.] libcall
--overwrite::
Enable this to use just the most recent records, which helps in high core count