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bpftool: Documentation for bpftool prog profile

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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
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Song Liu 2020-03-09 10:32:16 -07:00 committed by Daniel Borkmann
parent 47c09d6a9f
commit 319c7c1f6b
1 changed files with 19 additions and 0 deletions
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tools/bpf/bpftool/Documentation/bpftool-prog.rst
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@ -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),