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
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@ -30,6 +30,7 @@ PROG COMMANDS
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| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
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| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
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| **bpftool** **prog tracelog**
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| **bpftool** **prog tracelog**
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| **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*]
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| **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*]
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| **bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
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| **bpftool** **prog help**
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| **bpftool** **prog help**
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| *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
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| *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
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@ -48,6 +49,9 @@ PROG COMMANDS
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| *ATTACH_TYPE* := {
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| *ATTACH_TYPE* := {
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| **msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
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| **msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
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| }
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| }
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| *METRIC* := {
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| **cycles** | **instructions** | **l1d_loads** | **llc_misses**
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| }
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DESCRIPTION
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DESCRIPTION
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@ -189,6 +193,12 @@ DESCRIPTION
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not all of them can take the **ctx_in**/**ctx_out**
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not all of them can take the **ctx_in**/**ctx_out**
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arguments. bpftool does not perform checks on program types.
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arguments. bpftool does not perform checks on program types.
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**bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
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Profile *METRICs* for bpf program *PROG* for *DURATION*
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seconds or until user hits Ctrl-C. *DURATION* is optional.
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If *DURATION* is not specified, the profiling will run up to
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UINT_MAX seconds.
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**bpftool prog help**
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**bpftool prog help**
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Print short help message.
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Print short help message.
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@ -311,6 +321,15 @@ EXAMPLES
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**# rm /sys/fs/bpf/xdp1**
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**# rm /sys/fs/bpf/xdp1**
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| **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
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::
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51397 run_cnt
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40176203 cycles (83.05%)
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42518139 instructions # 1.06 insns per cycle (83.39%)
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123 llc_misses # 2.89 LLC misses per million insns (83.15%)
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SEE ALSO
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SEE ALSO
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========
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========
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**bpf**\ (2),
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**bpf**\ (2),
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