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authorSong Liu <songliubraving@fb.com>2020-03-09 10:32:16 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2020-03-10 00:04:07 +0100
commit319c7c1f6b78a04e72d32336787912cc1b284f25 (patch)
treef48d53d68b8ffc710612dc2d5f374a995f04e389 /tools/bpf
parent47c09d6a9f6794caface4ad50930460b82d7c670 (diff)
bpftool: Documentation for bpftool prog profile
Add documentation for the new bpftool prog profile command. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Quentin Monnet <quentin@isovalent.com> Link: https://lore.kernel.org/bpf/20200309173218.2739965-3-songliubraving@fb.com
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-prog.rst19
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 46862e85fed2..9f19404f470e 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -30,6 +30,7 @@ PROG COMMANDS
| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
| **bpftool** **prog tracelog**
| **bpftool** **prog run** *PROG* **data_in** *FILE* [**data_out** *FILE* [**data_size_out** *L*]] [**ctx_in** *FILE* [**ctx_out** *FILE* [**ctx_size_out** *M*]]] [**repeat** *N*]
+| **bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
| **bpftool** **prog help**
|
| *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
@@ -48,6 +49,9 @@ PROG COMMANDS
| *ATTACH_TYPE* := {
| **msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
| }
+| *METRIC* := {
+| **cycles** | **instructions** | **l1d_loads** | **llc_misses**
+| }
DESCRIPTION
@@ -189,6 +193,12 @@ DESCRIPTION
not all of them can take the **ctx_in**/**ctx_out**
arguments. bpftool does not perform checks on program types.
+ **bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
+ Profile *METRICs* for bpf program *PROG* for *DURATION*
+ seconds or until user hits Ctrl-C. *DURATION* is optional.
+ If *DURATION* is not specified, the profiling will run up to
+ UINT_MAX seconds.
+
**bpftool prog help**
Print short help message.
@@ -311,6 +321,15 @@ EXAMPLES
**# rm /sys/fs/bpf/xdp1**
+|
+| **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
+
+::
+ 51397 run_cnt
+ 40176203 cycles (83.05%)
+ 42518139 instructions # 1.06 insns per cycle (83.39%)
+ 123 llc_misses # 2.89 LLC misses per million insns (83.15%)
+
SEE ALSO
========
**bpf**\ (2),