1 .. SPDX-License-Identifier: (GPL-2.0-only OR B <<
2 <<
3 ================ 1 ================
4 bpftool-prog 2 bpftool-prog
5 ================ 3 ================
6 ---------------------------------------------- 4 -------------------------------------------------------------------------------
7 tool for inspection and simple manipulation of 5 tool for inspection and simple manipulation of eBPF progs
8 ---------------------------------------------- 6 -------------------------------------------------------------------------------
9 7
10 :Manual section: 8 8 :Manual section: 8
11 9
12 .. include:: substitutions.rst <<
13 <<
14 SYNOPSIS 10 SYNOPSIS
15 ======== 11 ========
16 12
17 **bpftool** [*OPTIONS*] **prog** *COMMAND* !! 13 **bpftool** [*OPTIONS*] **prog** *COMMAND*
18 14
19 *OPTIONS* := { |COMMON_OPTIONS| | !! 15 *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
20 { **-f** | **--bpffs** } | { **-m** | **--mapc !! 16 { **-f** | **--bpffs** } | { **-m** | **--mapcompat** } | { **-n** | **--nomount** } |
21 { **-L** | **--use-loader** } } !! 17 { **-L** | **--use-loader** } }
22 !! 18
23 *COMMANDS* := !! 19 *COMMANDS* :=
24 { **show** | **list** | **dump xlated** | **du !! 20 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** |
25 **loadall** | **help** } !! 21 **loadall** | **help** }
26 22
27 PROG COMMANDS 23 PROG COMMANDS
28 ============= 24 =============
29 25
30 | **bpftool** **prog** { **show** | **list** } !! 26 | **bpftool** **prog** { **show** | **list** } [*PROG*]
31 | **bpftool** **prog dump xlated** *PROG* [{ * !! 27 | **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual** | **linum**}]
32 | **bpftool** **prog dump jited** *PROG* [{ * !! 28 | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes** | **linum**}]
33 | **bpftool** **prog pin** *PROG* *FILE* !! 29 | **bpftool** **prog pin** *PROG* *FILE*
34 | **bpftool** **prog** { **load** | **loadall* !! 30 | **bpftool** **prog** { **load** | **loadall** } *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
35 | **bpftool** **prog attach** *PROG* *ATTACH_T !! 31 | **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
36 | **bpftool** **prog detach** *PROG* *ATTACH_T !! 32 | **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
37 | **bpftool** **prog tracelog** !! 33 | **bpftool** **prog tracelog**
38 | **bpftool** **prog run** *PROG* **data_in** !! 34 | **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*]
39 | **bpftool** **prog profile** *PROG* [**durat !! 35 | **bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
40 | **bpftool** **prog help** !! 36 | **bpftool** **prog help**
41 | 37 |
42 | *MAP* := { **id** *MAP_ID* | **pinned** *FIL !! 38 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
43 | *PROG* := { **id** *PROG_ID* | **pinned** *F !! 39 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* | **name** *PROG_NAME* }
44 | *TYPE* := { !! 40 | *TYPE* := {
45 | **socket** | **kprobe** | **kretprobe** !! 41 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
46 | **tracepoint** | **raw_tracepoint** | ** !! 42 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
47 | **cgroup/sock** | **cgroup/dev** | **lwt !! 43 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
48 | **lwt_seg6local** | **sockops** | **sk_s !! 44 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
49 | **cgroup/bind4** | **cgroup/bind6** | ** !! 45 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
50 | **cgroup/connect4** | **cgroup/connect6* !! 46 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/getpeername4** | **cgroup/getpeername6** |
51 | **cgroup/getpeername4** | **cgroup/getpe !! 47 | **cgroup/getsockname4** | **cgroup/getsockname6** | **cgroup/sendmsg4** | **cgroup/sendmsg6** |
52 | **cgroup/getsockname4** | **cgroup/getso !! 48 | **cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/sysctl** |
53 | **cgroup/sendmsg4** | **cgroup/sendmsg6* !! 49 | **cgroup/getsockopt** | **cgroup/setsockopt** | **cgroup/sock_release** |
54 | **cgroup/recvmsg4** | **cgroup/recvmsg6* !! 50 | **struct_ops** | **fentry** | **fexit** | **freplace** | **sk_lookup**
55 | **cgroup/getsockopt** | **cgroup/setsock !! 51 | }
56 | **struct_ops** | **fentry** | **fexit** !! 52 | *ATTACH_TYPE* := {
57 | } !! 53 | **msg_verdict** | **skb_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
58 | *ATTACH_TYPE* := { !! 54 | }
59 | **sk_msg_verdict** | **sk_skb_verdict** !! 55 | *METRICs* := {
60 | **sk_skb_stream_parser** | **flow_dissec !! 56 | **cycles** | **instructions** | **l1d_loads** | **llc_misses** |
61 | } !! 57 | **itlb_misses** | **dtlb_misses**
62 | *METRICs* := { !! 58 | }
63 | **cycles** | **instructions** | **l1d_lo <<
64 | **itlb_misses** | **dtlb_misses** <<
65 | } <<
66 59
67 60
68 DESCRIPTION 61 DESCRIPTION
69 =========== 62 ===========
70 bpftool prog { show | list } [*PROG*] !! 63 **bpftool prog { show | list }** [*PROG*]
71 Show information about loaded programs. I !! 64 Show information about loaded programs. If *PROG* is
72 information only about given programs, oth !! 65 specified show information only about given programs,
73 currently loaded on the system. In case of !! 66 otherwise list all programs currently loaded on the system.
74 match several programs which will all be s !! 67 In case of **tag** or **name**, *PROG* may match several
75 !! 68 programs which will all be shown.
76 Output will start with program ID followed !! 69
77 named attributes (depending on kernel vers !! 70 Output will start with program ID followed by program type and
78 !! 71 zero or more named attributes (depending on kernel version).
79 Since Linux 5.1 the kernel can collect sta !! 72
80 the total time spent running the program, !! 73 Since Linux 5.1 the kernel can collect statistics on BPF
81 run). If available, bpftool shows such sta !! 74 programs (such as the total time spent running the program,
82 not collect them by defaults, as it slight !! 75 and the number of times it was run). If available, bpftool
83 program run. Activation or deactivation of !! 76 shows such statistics. However, the kernel does not collect
84 **kernel.bpf_stats_enabled** sysctl knob. !! 77 them by defaults, as it slightly impacts performance on each
85 !! 78 program run. Activation or deactivation of the feature is
86 Since Linux 5.8 bpftool is able to discove !! 79 performed via the **kernel.bpf_stats_enabled** sysctl knob.
87 that hold open file descriptors (FDs) agai !! 80
88 bpftool will automatically emit this infor !! 81 Since Linux 5.8 bpftool is able to discover information about
89 !! 82 processes that hold open file descriptors (FDs) against BPF
90 bpftool prog dump xlated *PROG* [{ file *FILE* !! 83 programs. On such kernels bpftool will automatically emit this
91 Dump eBPF instructions of the programs fro !! 84 information as well.
92 will be disassembled and printed to standa !! 85
93 format. In this case, **opcodes** controls !! 86 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** | **linum** }]
94 as well. !! 87 Dump eBPF instructions of the programs from the kernel. By
95 !! 88 default, eBPF will be disassembled and printed to standard
96 In case of **tag** or **name**, *PROG* may !! 89 output in human-readable format. In this case, **opcodes**
97 will all be dumped. However, if **file** !! 90 controls if raw opcodes should be printed as well.
98 *PROG* must match a single program. !! 91
99 !! 92 In case of **tag** or **name**, *PROG* may match several
100 If **file** is specified, the binary image !! 93 programs which will all be dumped. However, if **file** or
101 *FILE*. !! 94 **visual** is specified, *PROG* must match a single program.
102 !! 95
103 If **visual** is specified, control flow g !! 96 If **file** is specified, the binary image will instead be
104 and eBPF instructions will be presented wi !! 97 written to *FILE*.
105 output. !! 98
106 !! 99 If **visual** is specified, control flow graph (CFG) will be
107 If the programs have line_info available, !! 100 built instead, and eBPF instructions will be presented with
108 displayed. If **linum** is specified, the !! 101 CFG in DOT format, on standard output.
109 column will also be displayed. !! 102
110 !! 103 If the programs have line_info available, the source line will
111 bpftool prog dump jited *PROG* [{ file *FILE* !! 104 be displayed by default. If **linum** is specified,
112 Dump jited image (host machine code) of th !! 105 the filename, line number and line column will also be
113 !! 106 displayed on top of the source line.
114 If *FILE* is specified image will be writt !! 107
115 be disassembled and printed to stdout. *PR !! 108 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** | **linum** }]
116 when **file** is specified. !! 109 Dump jited image (host machine code) of the program.
117 !! 110
118 **opcodes** controls if raw opcodes will b !! 111 If *FILE* is specified image will be written to a file,
119 !! 112 otherwise it will be disassembled and printed to stdout.
120 If the prog has line_info available, the s !! 113 *PROG* must match a single program when **file** is specified.
121 **linum** is specified, the filename, line !! 114
122 be displayed. !! 115 **opcodes** controls if raw opcodes will be printed.
123 !! 116
124 bpftool prog pin *PROG* *FILE* !! 117 If the prog has line_info available, the source line will
125 Pin program *PROG* as *FILE*. !! 118 be displayed by default. If **linum** is specified,
126 !! 119 the filename, line number and line column will also be
127 Note: *FILE* must be located in *bpffs* mo !! 120 displayed on top of the source line.
128 character ('.'), which is reserved for fut !! 121
129 !! 122 **bpftool prog pin** *PROG* *FILE*
130 bpftool prog { load | loadall } *OBJ* *PATH* [ !! 123 Pin program *PROG* as *FILE*.
131 Load bpf program(s) from binary *OBJ* and !! 124
132 load** pins only the first program from th !! 125 Note: *FILE* must be located in *bpffs* mount. It must not
133 loadall** pins all programs from the *OBJ* !! 126 contain a dot character ('.'), which is reserved for future
134 is optional, if not specified program type !! 127 extensions of *bpffs*.
135 names. By default bpftool will create new !! 128
136 object being loaded. **map** parameter al !! 129 **bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] [**pinmaps** *MAP_DIR*]
137 maps. It can be specified multiple times, !! 130 Load bpf program(s) from binary *OBJ* and pin as *PATH*.
138 *IDX* refers to index of the map to be rep !! 131 **bpftool prog load** pins only the first program from the
139 from 0, while *NAME* allows to replace a m !! 132 *OBJ* as *PATH*. **bpftool prog loadall** pins all programs
140 map to use, referring to it by **id** or t !! 133 from the *OBJ* under *PATH* directory.
141 **offload_dev** *NAME* is specified progra !! 134 **type** is optional, if not specified program type will be
142 networking device (offload). If **xdpmeta_ !! 135 inferred from section names.
143 will become device-bound without offloadin !! 136 By default bpftool will create new maps as declared in the ELF
144 metadata. Optional **pinmaps** argument ca !! 137 object being loaded. **map** parameter allows for the reuse
145 under *MAP_DIR* directory. !! 138 of existing maps. It can be specified multiple times, each
146 !! 139 time for a different map. *IDX* refers to index of the map
147 If **autoattach** is specified program wil !! 140 to be replaced in the ELF file counting from 0, while *NAME*
148 case, only the link (representing the prog !! 141 allows to replace a map by name. *MAP* specifies the map to
149 pinned, not the program as such, so the pa !! 142 use, referring to it by **id** or through a **pinned** file.
150 show -f**, only show in **bpftool link sho !! 143 If **dev** *NAME* is specified program will be loaded onto
151 when bpftool (libbpf) is able to infer all !! 144 given networking device (offload).
152 object file, in particular, it's not suppo !! 145 Optional **pinmaps** argument can be provided to pin all
153 program does not support autoattach, bpfto !! 146 maps under *MAP_DIR* directory.
154 for that program instead. !! 147
155 !! 148 Note: *PATH* must be located in *bpffs* mount. It must not
156 Note: *PATH* must be located in *bpffs* mo !! 149 contain a dot character ('.'), which is reserved for future
157 character ('.'), which is reserved for fut !! 150 extensions of *bpffs*.
158 !! 151
159 bpftool prog attach *PROG* *ATTACH_TYPE* [*MAP !! 152 **bpftool prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
160 Attach bpf program *PROG* (with type speci !! 153 Attach bpf program *PROG* (with type specified by
161 *ATTACH_TYPEs* require a *MAP* parameter, !! 154 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
162 *flow_dissector* which is attached to curr !! 155 parameter, with the exception of *flow_dissector* which is
163 !! 156 attached to current networking name space.
164 bpftool prog detach *PROG* *ATTACH_TYPE* [*MAP !! 157
165 Detach bpf program *PROG* (with type speci !! 158 **bpftool prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
166 *ATTACH_TYPEs* require a *MAP* parameter, !! 159 Detach bpf program *PROG* (with type specified by
167 *flow_dissector* which is detached from th !! 160 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
168 !! 161 parameter, with the exception of *flow_dissector* which is
169 bpftool prog tracelog !! 162 detached from the current networking name space.
170 Dump the trace pipe of the system to the c !! 163
171 stop printing. BPF programs can write to t !! 164 **bpftool prog tracelog**
172 the **bpf_trace_printk**\ () helper. This !! 165 Dump the trace pipe of the system to the console (stdout).
173 purposes. For streaming data from BPF prog !! 166 Hit <Ctrl+C> to stop printing. BPF programs can write to this
174 perf events (see also **bpftool-map**\ (8) !! 167 trace pipe at runtime with the **bpf_trace_printk**\ () helper.
175 !! 168 This should be used only for debugging purposes. For
176 bpftool prog run *PROG* data_in *FILE* [data_o !! 169 streaming data from BPF programs to user space, one can use
177 Run BPF program *PROG* in the kernel testi !! 170 perf events (see also **bpftool-map**\ (8)).
178 meaning that the program works on the data !! 171
179 user, and not on actual packets or monitor !! 172 **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*]
180 and duration for the test run are printed !! 173 Run BPF program *PROG* in the kernel testing infrastructure
181 !! 174 for BPF, meaning that the program works on the data and
182 Input data is read from the *FILE* passed !! 175 context provided by the user, and not on actual packets or
183 is "**-**", input data is read from standa !! 176 monitored functions etc. Return value and duration for the
184 is read from *FILE* passed with **ctx_in** !! 177 test run are printed out to the console.
185 read from standard input, but only if stan !! 178
186 for input data. If a *FILE* is passed with !! 179 Input data is read from the *FILE* passed with **data_in**.
187 written to that file. Similarly, output co !! 180 If this *FILE* is "**-**", input data is read from standard
188 passed with **ctx_out**. For both output f !! 181 input. Input context, if any, is read from *FILE* passed with
189 print to the standard output (as plain tex !! 182 **ctx_in**. Again, "**-**" can be used to read from standard
190 passed). If output keywords are omitted, o !! 183 input, but only if standard input is not already in use for
191 discarded. Keywords **data_size_out** and !! 184 input data. If a *FILE* is passed with **data_out**, output
192 the size (in bytes) for the output buffers !! 185 data is written to that file. Similarly, output context is
193 default of 32 kB should be more than enoug !! 186 written to the *FILE* passed with **ctx_out**. For both
194 !! 187 output flows, "**-**" can be used to print to the standard
195 Keyword **repeat** is used to indicate the !! 188 output (as plain text, or JSON if relevant option was
196 perform. Note that output data and context !! 189 passed). If output keywords are omitted, output data and
197 the last of those runs. The duration print !! 190 context are discarded. Keywords **data_size_out** and
198 an average over all runs performed by the !! 191 **ctx_size_out** are used to pass the size (in bytes) for the
199 !! 192 output buffers to the kernel, although the default of 32 kB
200 Not all program types support test run. Am !! 193 should be more than enough for most cases.
201 them can take the **ctx_in**/**ctx_out** a !! 194
202 perform checks on program types. !! 195 Keyword **repeat** is used to indicate the number of
203 !! 196 consecutive runs to perform. Note that output data and
204 bpftool prog profile *PROG* [duration *DURATIO !! 197 context printed to files correspond to the last of those
205 Profile *METRICs* for bpf program *PROG* f !! 198 runs. The duration printed out at the end of the runs is an
206 user hits <Ctrl+C>. *DURATION* is optional !! 199 average over all runs performed by the command.
207 the profiling will run up to **UINT_MAX** !! 200
>> 201 Not all program types support test run. Among those which do,
>> 202 not all of them can take the **ctx_in**/**ctx_out**
>> 203 arguments. bpftool does not perform checks on program types.
>> 204
>> 205 **bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
>> 206 Profile *METRICs* for bpf program *PROG* for *DURATION*
>> 207 seconds or until user hits <Ctrl+C>. *DURATION* is optional.
>> 208 If *DURATION* is not specified, the profiling will run up to
>> 209 **UINT_MAX** seconds.
208 210
209 bpftool prog help !! 211 **bpftool prog help**
210 Print short help message. !! 212 Print short help message.
211 213
212 OPTIONS 214 OPTIONS
213 ======= 215 =======
214 .. include:: common_options.rst !! 216 .. include:: common_options.rst
215 <<
216 -f, --bpffs <<
217 When showing BPF programs, show file names <<
218 <<
219 -m, --mapcompat <<
220 Allow loading maps with unknown map defini <<
221 217
222 -n, --nomount !! 218 -f, --bpffs
223 Do not automatically attempt to mount any !! 219 When showing BPF programs, show file names of pinned
224 tracefs or BPF virtual file system) when n !! 220 programs.
225 !! 221
226 -L, --use-loader !! 222 -m, --mapcompat
227 Load program as a "loader" program. This i !! 223 Allow loading maps with unknown map definitions.
228 of such programs. When this option is in u !! 224
229 programs from the object file into the ker !! 225 -n, --nomount
230 (therefore, the *PATH* must not be provide !! 226 Do not automatically attempt to mount any virtual file system
231 !! 227 (such as tracefs or BPF virtual file system) when necessary.
232 When combined with the **-d**\ \|\ **--deb !! 228
233 messages are generated, and the execution !! 229 -L, --use-loader
234 the **bpf_trace_printk**\ () helper to log !! 230 Load program as a "loader" program. This is useful to debug
235 creating the maps, and loading the program !! 231 the generation of such programs. When this option is in
236 as a way to dump those messages). !! 232 use, bpftool attempts to load the programs from the object
>> 233 file into the kernel, but does not pin them (therefore, the
>> 234 *PATH* must not be provided).
>> 235
>> 236 When combined with the **-d**\ \|\ **--debug** option,
>> 237 additional debug messages are generated, and the execution
>> 238 of the loader program will use the **bpf_trace_printk**\ ()
>> 239 helper to log each step of loading BTF, creating the maps,
>> 240 and loading the programs (see **bpftool prog tracelog** as
>> 241 a way to dump those messages).
237 242
238 EXAMPLES 243 EXAMPLES
239 ======== 244 ========
240 **# bpftool prog show** 245 **# bpftool prog show**
241 246
242 :: 247 ::
243 248
244 10: xdp name some_prog tag 005a3d2123620 249 10: xdp name some_prog tag 005a3d2123620c8b gpl run_time_ns 81632 run_cnt 10
245 loaded_at 2017-09-29T20:11:00+0000 250 loaded_at 2017-09-29T20:11:00+0000 uid 0
246 xlated 528B jited 370B memlock 4 251 xlated 528B jited 370B memlock 4096B map_ids 10
247 pids systemd(1) 252 pids systemd(1)
248 253
249 **# bpftool --json --pretty prog show** 254 **# bpftool --json --pretty prog show**
250 255
251 :: 256 ::
252 257
253 [{ 258 [{
254 "id": 10, 259 "id": 10,
255 "type": "xdp", 260 "type": "xdp",
256 "tag": "005a3d2123620c8b", 261 "tag": "005a3d2123620c8b",
257 "gpl_compatible": true, 262 "gpl_compatible": true,
258 "run_time_ns": 81632, 263 "run_time_ns": 81632,
259 "run_cnt": 10, 264 "run_cnt": 10,
260 "loaded_at": 1506715860, 265 "loaded_at": 1506715860,
261 "uid": 0, 266 "uid": 0,
262 "bytes_xlated": 528, 267 "bytes_xlated": 528,
263 "jited": true, 268 "jited": true,
264 "bytes_jited": 370, 269 "bytes_jited": 370,
265 "bytes_memlock": 4096, 270 "bytes_memlock": 4096,
266 "map_ids": [10 271 "map_ids": [10
267 ], 272 ],
268 "pids": [{ 273 "pids": [{
269 "pid": 1, 274 "pid": 1,
270 "comm": "systemd" 275 "comm": "systemd"
271 } 276 }
272 ] 277 ]
273 } 278 }
274 ] 279 ]
275 280
276 | 281 |
277 | **# bpftool prog dump xlated id 10 file /tmp 282 | **# bpftool prog dump xlated id 10 file /tmp/t**
278 | **$ ls -l /tmp/t** 283 | **$ ls -l /tmp/t**
279 284
280 :: 285 ::
281 286
282 -rw------- 1 root root 560 Jul 22 01:42 /t 287 -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
283 288
284 **# bpftool prog dump jited tag 005a3d2123620c 289 **# bpftool prog dump jited tag 005a3d2123620c8b**
285 290
286 :: 291 ::
287 292
288 0: push %rbp 293 0: push %rbp
289 1: mov %rsp,%rbp 294 1: mov %rsp,%rbp
290 2: sub $0x228,%rsp 295 2: sub $0x228,%rsp
291 3: sub $0x28,%rbp 296 3: sub $0x28,%rbp
292 4: mov %rbx,0x0(%rbp) 297 4: mov %rbx,0x0(%rbp)
293 298
294 | 299 |
295 | **# mount -t bpf none /sys/fs/bpf/** 300 | **# mount -t bpf none /sys/fs/bpf/**
296 | **# bpftool prog pin id 10 /sys/fs/bpf/prog* 301 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
297 | **# bpftool prog load ./my_prog.o /sys/fs/bp 302 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
298 | **# ls -l /sys/fs/bpf/** 303 | **# ls -l /sys/fs/bpf/**
299 304
300 :: 305 ::
301 306
302 -rw------- 1 root root 0 Jul 22 01:43 prog 307 -rw------- 1 root root 0 Jul 22 01:43 prog
303 -rw------- 1 root root 0 Jul 22 01:44 prog 308 -rw------- 1 root root 0 Jul 22 01:44 prog2
304 309
305 **# bpftool prog dump jited pinned /sys/fs/bpf 310 **# bpftool prog dump jited pinned /sys/fs/bpf/prog opcodes**
306 311
307 :: 312 ::
308 313
309 0: push %rbp 314 0: push %rbp
310 55 315 55
311 1: mov %rsp,%rbp 316 1: mov %rsp,%rbp
312 48 89 e5 317 48 89 e5
313 4: sub $0x228,%rsp 318 4: sub $0x228,%rsp
314 48 81 ec 28 02 00 00 319 48 81 ec 28 02 00 00
315 b: sub $0x28,%rbp 320 b: sub $0x28,%rbp
316 48 83 ed 28 321 48 83 ed 28
317 f: mov %rbx,0x0(%rbp) 322 f: mov %rbx,0x0(%rbp)
318 48 89 5d 00 323 48 89 5d 00
319 324
320 | 325 |
321 | **# bpftool prog load xdp1_kern.o /sys/fs/bp 326 | **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
322 | **# bpftool prog show pinned /sys/fs/bpf/xdp 327 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
323 328
324 :: 329 ::
325 330
326 9: xdp name xdp_prog1 tag 539ec6ce11b52f 331 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
327 loaded_at 2018-06-25T16:17:31-0700 332 loaded_at 2018-06-25T16:17:31-0700 uid 0
328 xlated 488B jited 336B memlock 4 333 xlated 488B jited 336B memlock 4096B map_ids 7
329 334
330 **# rm /sys/fs/bpf/xdp1** 335 **# rm /sys/fs/bpf/xdp1**
331 336
332 | 337 |
333 | **# bpftool prog profile id 337 duration 10 338 | **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
334 339
335 :: 340 ::
336 341
337 51397 run_cnt 342 51397 run_cnt
338 40176203 cycles 343 40176203 cycles (83.05%)
339 42518139 instructions # 1.06 insns 344 42518139 instructions # 1.06 insns per cycle (83.39%)
340 123 llc_misses # 2.89 LLC mi 345 123 llc_misses # 2.89 LLC misses per million insns (83.15%)
341 346
342 | 347 |
343 | Output below is for the trace logs. 348 | Output below is for the trace logs.
344 | Run in separate terminals: 349 | Run in separate terminals:
345 | **# bpftool prog tracelog** 350 | **# bpftool prog tracelog**
346 | **# bpftool prog load -L -d file.o** 351 | **# bpftool prog load -L -d file.o**
347 352
348 :: 353 ::
349 354
350 bpftool-620059 [004] d... 2634685.517903: 355 bpftool-620059 [004] d... 2634685.517903: bpf_trace_printk: btf_load size 665 r=5
351 bpftool-620059 [004] d... 2634685.517912: 356 bpftool-620059 [004] d... 2634685.517912: bpf_trace_printk: map_create sample_map idx 0 type 2 value_size 4 value_btf_id 0 r=6
352 bpftool-620059 [004] d... 2634685.517997: 357 bpftool-620059 [004] d... 2634685.517997: bpf_trace_printk: prog_load sample insn_cnt 13 r=7
353 bpftool-620059 [004] d... 2634685.517999: 358 bpftool-620059 [004] d... 2634685.517999: bpf_trace_printk: close(5) = 0
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