1 .. SPDX-License-Identifier: (GPL-2.0-only OR B 1 .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 2
3 ================ 3 ================
4 bpftool-prog 4 bpftool-prog
5 ================ 5 ================
6 ---------------------------------------------- 6 -------------------------------------------------------------------------------
7 tool for inspection and simple manipulation of 7 tool for inspection and simple manipulation of eBPF progs
8 ---------------------------------------------- 8 -------------------------------------------------------------------------------
9 9
10 :Manual section: 8 10 :Manual section: 8
11 11
12 .. include:: substitutions.rst 12 .. include:: substitutions.rst
13 13
14 SYNOPSIS 14 SYNOPSIS
15 ======== 15 ========
16 16
17 **bpftool** [*OPTIONS*] **prog** *COMMAND* !! 17 **bpftool** [*OPTIONS*] **prog** *COMMAND*
18 18
19 *OPTIONS* := { |COMMON_OPTIONS| | !! 19 *OPTIONS* := { |COMMON_OPTIONS| |
20 { **-f** | **--bpffs** } | { **-m** | **--mapc !! 20 { **-f** | **--bpffs** } | { **-m** | **--mapcompat** } | { **-n** | **--nomount** } |
21 { **-L** | **--use-loader** } } !! 21 { **-L** | **--use-loader** } }
22 !! 22
23 *COMMANDS* := !! 23 *COMMANDS* :=
24 { **show** | **list** | **dump xlated** | **du !! 24 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** |
25 **loadall** | **help** } !! 25 **loadall** | **help** }
26 26
27 PROG COMMANDS 27 PROG COMMANDS
28 ============= 28 =============
29 29
30 | **bpftool** **prog** { **show** | **list** } !! 30 | **bpftool** **prog** { **show** | **list** } [*PROG*]
31 | **bpftool** **prog dump xlated** *PROG* [{ * !! 31 | **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual** | **linum**}]
32 | **bpftool** **prog dump jited** *PROG* [{ * !! 32 | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes** | **linum**}]
33 | **bpftool** **prog pin** *PROG* *FILE* !! 33 | **bpftool** **prog pin** *PROG* *FILE*
34 | **bpftool** **prog** { **load** | **loadall* !! 34 | **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 !! 35 | **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
36 | **bpftool** **prog detach** *PROG* *ATTACH_T !! 36 | **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
37 | **bpftool** **prog tracelog** !! 37 | **bpftool** **prog tracelog**
38 | **bpftool** **prog run** *PROG* **data_in** !! 38 | **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 !! 39 | **bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
40 | **bpftool** **prog help** !! 40 | **bpftool** **prog help**
41 | 41 |
42 | *MAP* := { **id** *MAP_ID* | **pinned** *FIL !! 42 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
43 | *PROG* := { **id** *PROG_ID* | **pinned** *F !! 43 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* | **name** *PROG_NAME* }
44 | *TYPE* := { !! 44 | *TYPE* := {
45 | **socket** | **kprobe** | **kretprobe** !! 45 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
46 | **tracepoint** | **raw_tracepoint** | ** !! 46 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
47 | **cgroup/sock** | **cgroup/dev** | **lwt !! 47 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
48 | **lwt_seg6local** | **sockops** | **sk_s !! 48 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
49 | **cgroup/bind4** | **cgroup/bind6** | ** !! 49 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
50 | **cgroup/connect4** | **cgroup/connect6* !! 50 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/getpeername4** | **cgroup/getpeername6** |
51 | **cgroup/getpeername4** | **cgroup/getpe !! 51 | **cgroup/getsockname4** | **cgroup/getsockname6** | **cgroup/sendmsg4** | **cgroup/sendmsg6** |
52 | **cgroup/getsockname4** | **cgroup/getso !! 52 | **cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/sysctl** |
53 | **cgroup/sendmsg4** | **cgroup/sendmsg6* !! 53 | **cgroup/getsockopt** | **cgroup/setsockopt** | **cgroup/sock_release** |
54 | **cgroup/recvmsg4** | **cgroup/recvmsg6* !! 54 | **struct_ops** | **fentry** | **fexit** | **freplace** | **sk_lookup**
55 | **cgroup/getsockopt** | **cgroup/setsock !! 55 | }
56 | **struct_ops** | **fentry** | **fexit** !! 56 | *ATTACH_TYPE* := {
57 | } !! 57 | **msg_verdict** | **skb_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
58 | *ATTACH_TYPE* := { !! 58 | }
59 | **sk_msg_verdict** | **sk_skb_verdict** !! 59 | *METRICs* := {
60 | **sk_skb_stream_parser** | **flow_dissec !! 60 | **cycles** | **instructions** | **l1d_loads** | **llc_misses** |
61 | } !! 61 | **itlb_misses** | **dtlb_misses**
62 | *METRICs* := { !! 62 | }
63 | **cycles** | **instructions** | **l1d_lo <<
64 | **itlb_misses** | **dtlb_misses** <<
65 | } <<
66 63
67 64
68 DESCRIPTION 65 DESCRIPTION
69 =========== 66 ===========
70 bpftool prog { show | list } [*PROG*] !! 67 **bpftool prog { show | list }** [*PROG*]
71 Show information about loaded programs. I !! 68 Show information about loaded programs. If *PROG* is
72 information only about given programs, oth !! 69 specified show information only about given programs,
73 currently loaded on the system. In case of !! 70 otherwise list all programs currently loaded on the system.
74 match several programs which will all be s !! 71 In case of **tag** or **name**, *PROG* may match several
75 !! 72 programs which will all be shown.
76 Output will start with program ID followed !! 73
77 named attributes (depending on kernel vers !! 74 Output will start with program ID followed by program type and
78 !! 75 zero or more named attributes (depending on kernel version).
79 Since Linux 5.1 the kernel can collect sta !! 76
80 the total time spent running the program, !! 77 Since Linux 5.1 the kernel can collect statistics on BPF
81 run). If available, bpftool shows such sta !! 78 programs (such as the total time spent running the program,
82 not collect them by defaults, as it slight !! 79 and the number of times it was run). If available, bpftool
83 program run. Activation or deactivation of !! 80 shows such statistics. However, the kernel does not collect
84 **kernel.bpf_stats_enabled** sysctl knob. !! 81 them by defaults, as it slightly impacts performance on each
85 !! 82 program run. Activation or deactivation of the feature is
86 Since Linux 5.8 bpftool is able to discove !! 83 performed via the **kernel.bpf_stats_enabled** sysctl knob.
87 that hold open file descriptors (FDs) agai !! 84
88 bpftool will automatically emit this infor !! 85 Since Linux 5.8 bpftool is able to discover information about
89 !! 86 processes that hold open file descriptors (FDs) against BPF
90 bpftool prog dump xlated *PROG* [{ file *FILE* !! 87 programs. On such kernels bpftool will automatically emit this
91 Dump eBPF instructions of the programs fro !! 88 information as well.
92 will be disassembled and printed to standa !! 89
93 format. In this case, **opcodes** controls !! 90 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** | **linum** }]
94 as well. !! 91 Dump eBPF instructions of the programs from the kernel. By
95 !! 92 default, eBPF will be disassembled and printed to standard
96 In case of **tag** or **name**, *PROG* may !! 93 output in human-readable format. In this case, **opcodes**
97 will all be dumped. However, if **file** !! 94 controls if raw opcodes should be printed as well.
98 *PROG* must match a single program. !! 95
99 !! 96 In case of **tag** or **name**, *PROG* may match several
100 If **file** is specified, the binary image !! 97 programs which will all be dumped. However, if **file** or
101 *FILE*. !! 98 **visual** is specified, *PROG* must match a single program.
102 !! 99
103 If **visual** is specified, control flow g !! 100 If **file** is specified, the binary image will instead be
104 and eBPF instructions will be presented wi !! 101 written to *FILE*.
105 output. !! 102
106 !! 103 If **visual** is specified, control flow graph (CFG) will be
107 If the programs have line_info available, !! 104 built instead, and eBPF instructions will be presented with
108 displayed. If **linum** is specified, the !! 105 CFG in DOT format, on standard output.
109 column will also be displayed. !! 106
110 !! 107 If the programs have line_info available, the source line will
111 bpftool prog dump jited *PROG* [{ file *FILE* !! 108 be displayed by default. If **linum** is specified,
112 Dump jited image (host machine code) of th !! 109 the filename, line number and line column will also be
113 !! 110 displayed on top of the source line.
114 If *FILE* is specified image will be writt !! 111
115 be disassembled and printed to stdout. *PR !! 112 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** | **linum** }]
116 when **file** is specified. !! 113 Dump jited image (host machine code) of the program.
117 !! 114
118 **opcodes** controls if raw opcodes will b !! 115 If *FILE* is specified image will be written to a file,
119 !! 116 otherwise it will be disassembled and printed to stdout.
120 If the prog has line_info available, the s !! 117 *PROG* must match a single program when **file** is specified.
121 **linum** is specified, the filename, line !! 118
122 be displayed. !! 119 **opcodes** controls if raw opcodes will be printed.
123 !! 120
124 bpftool prog pin *PROG* *FILE* !! 121 If the prog has line_info available, the source line will
125 Pin program *PROG* as *FILE*. !! 122 be displayed by default. If **linum** is specified,
126 !! 123 the filename, line number and line column will also be
127 Note: *FILE* must be located in *bpffs* mo !! 124 displayed on top of the source line.
128 character ('.'), which is reserved for fut !! 125
129 !! 126 **bpftool prog pin** *PROG* *FILE*
130 bpftool prog { load | loadall } *OBJ* *PATH* [ !! 127 Pin program *PROG* as *FILE*.
131 Load bpf program(s) from binary *OBJ* and !! 128
132 load** pins only the first program from th !! 129 Note: *FILE* must be located in *bpffs* mount. It must not
133 loadall** pins all programs from the *OBJ* !! 130 contain a dot character ('.'), which is reserved for future
134 is optional, if not specified program type !! 131 extensions of *bpffs*.
135 names. By default bpftool will create new !! 132
136 object being loaded. **map** parameter al !! 133 **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, !! 134 Load bpf program(s) from binary *OBJ* and pin as *PATH*.
138 *IDX* refers to index of the map to be rep !! 135 **bpftool prog load** pins only the first program from the
139 from 0, while *NAME* allows to replace a m !! 136 *OBJ* as *PATH*. **bpftool prog loadall** pins all programs
140 map to use, referring to it by **id** or t !! 137 from the *OBJ* under *PATH* directory.
141 **offload_dev** *NAME* is specified progra !! 138 **type** is optional, if not specified program type will be
142 networking device (offload). If **xdpmeta_ !! 139 inferred from section names.
143 will become device-bound without offloadin !! 140 By default bpftool will create new maps as declared in the ELF
144 metadata. Optional **pinmaps** argument ca !! 141 object being loaded. **map** parameter allows for the reuse
145 under *MAP_DIR* directory. !! 142 of existing maps. It can be specified multiple times, each
146 !! 143 time for a different map. *IDX* refers to index of the map
147 If **autoattach** is specified program wil !! 144 to be replaced in the ELF file counting from 0, while *NAME*
148 case, only the link (representing the prog !! 145 allows to replace a map by name. *MAP* specifies the map to
149 pinned, not the program as such, so the pa !! 146 use, referring to it by **id** or through a **pinned** file.
150 show -f**, only show in **bpftool link sho !! 147 If **dev** *NAME* is specified program will be loaded onto
151 when bpftool (libbpf) is able to infer all !! 148 given networking device (offload).
152 object file, in particular, it's not suppo !! 149 Optional **pinmaps** argument can be provided to pin all
153 program does not support autoattach, bpfto !! 150 maps under *MAP_DIR* directory.
154 for that program instead. !! 151
155 !! 152 Note: *PATH* must be located in *bpffs* mount. It must not
156 Note: *PATH* must be located in *bpffs* mo !! 153 contain a dot character ('.'), which is reserved for future
157 character ('.'), which is reserved for fut !! 154 extensions of *bpffs*.
158 !! 155
159 bpftool prog attach *PROG* *ATTACH_TYPE* [*MAP !! 156 **bpftool prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
160 Attach bpf program *PROG* (with type speci !! 157 Attach bpf program *PROG* (with type specified by
161 *ATTACH_TYPEs* require a *MAP* parameter, !! 158 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
162 *flow_dissector* which is attached to curr !! 159 parameter, with the exception of *flow_dissector* which is
163 !! 160 attached to current networking name space.
164 bpftool prog detach *PROG* *ATTACH_TYPE* [*MAP !! 161
165 Detach bpf program *PROG* (with type speci !! 162 **bpftool prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
166 *ATTACH_TYPEs* require a *MAP* parameter, !! 163 Detach bpf program *PROG* (with type specified by
167 *flow_dissector* which is detached from th !! 164 *ATTACH_TYPE*). Most *ATTACH_TYPEs* require a *MAP*
168 !! 165 parameter, with the exception of *flow_dissector* which is
169 bpftool prog tracelog !! 166 detached from the current networking name space.
170 Dump the trace pipe of the system to the c !! 167
171 stop printing. BPF programs can write to t !! 168 **bpftool prog tracelog**
172 the **bpf_trace_printk**\ () helper. This !! 169 Dump the trace pipe of the system to the console (stdout).
173 purposes. For streaming data from BPF prog !! 170 Hit <Ctrl+C> to stop printing. BPF programs can write to this
174 perf events (see also **bpftool-map**\ (8) !! 171 trace pipe at runtime with the **bpf_trace_printk**\ () helper.
175 !! 172 This should be used only for debugging purposes. For
176 bpftool prog run *PROG* data_in *FILE* [data_o !! 173 streaming data from BPF programs to user space, one can use
177 Run BPF program *PROG* in the kernel testi !! 174 perf events (see also **bpftool-map**\ (8)).
178 meaning that the program works on the data !! 175
179 user, and not on actual packets or monitor !! 176 **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 !! 177 Run BPF program *PROG* in the kernel testing infrastructure
181 !! 178 for BPF, meaning that the program works on the data and
182 Input data is read from the *FILE* passed !! 179 context provided by the user, and not on actual packets or
183 is "**-**", input data is read from standa !! 180 monitored functions etc. Return value and duration for the
184 is read from *FILE* passed with **ctx_in** !! 181 test run are printed out to the console.
185 read from standard input, but only if stan !! 182
186 for input data. If a *FILE* is passed with !! 183 Input data is read from the *FILE* passed with **data_in**.
187 written to that file. Similarly, output co !! 184 If this *FILE* is "**-**", input data is read from standard
188 passed with **ctx_out**. For both output f !! 185 input. Input context, if any, is read from *FILE* passed with
189 print to the standard output (as plain tex !! 186 **ctx_in**. Again, "**-**" can be used to read from standard
190 passed). If output keywords are omitted, o !! 187 input, but only if standard input is not already in use for
191 discarded. Keywords **data_size_out** and !! 188 input data. If a *FILE* is passed with **data_out**, output
192 the size (in bytes) for the output buffers !! 189 data is written to that file. Similarly, output context is
193 default of 32 kB should be more than enoug !! 190 written to the *FILE* passed with **ctx_out**. For both
194 !! 191 output flows, "**-**" can be used to print to the standard
195 Keyword **repeat** is used to indicate the !! 192 output (as plain text, or JSON if relevant option was
196 perform. Note that output data and context !! 193 passed). If output keywords are omitted, output data and
197 the last of those runs. The duration print !! 194 context are discarded. Keywords **data_size_out** and
198 an average over all runs performed by the !! 195 **ctx_size_out** are used to pass the size (in bytes) for the
199 !! 196 output buffers to the kernel, although the default of 32 kB
200 Not all program types support test run. Am !! 197 should be more than enough for most cases.
201 them can take the **ctx_in**/**ctx_out** a !! 198
202 perform checks on program types. !! 199 Keyword **repeat** is used to indicate the number of
203 !! 200 consecutive runs to perform. Note that output data and
204 bpftool prog profile *PROG* [duration *DURATIO !! 201 context printed to files correspond to the last of those
205 Profile *METRICs* for bpf program *PROG* f !! 202 runs. The duration printed out at the end of the runs is an
206 user hits <Ctrl+C>. *DURATION* is optional !! 203 average over all runs performed by the command.
207 the profiling will run up to **UINT_MAX** !! 204
>> 205 Not all program types support test run. Among those which do,
>> 206 not all of them can take the **ctx_in**/**ctx_out**
>> 207 arguments. bpftool does not perform checks on program types.
>> 208
>> 209 **bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
>> 210 Profile *METRICs* for bpf program *PROG* for *DURATION*
>> 211 seconds or until user hits <Ctrl+C>. *DURATION* is optional.
>> 212 If *DURATION* is not specified, the profiling will run up to
>> 213 **UINT_MAX** seconds.
208 214
209 bpftool prog help !! 215 **bpftool prog help**
210 Print short help message. !! 216 Print short help message.
211 217
212 OPTIONS 218 OPTIONS
213 ======= 219 =======
214 .. include:: common_options.rst !! 220 .. include:: common_options.rst
215 221
216 -f, --bpffs !! 222 -f, --bpffs
217 When showing BPF programs, show file names !! 223 When showing BPF programs, show file names of pinned
218 !! 224 programs.
219 -m, --mapcompat !! 225
220 Allow loading maps with unknown map defini !! 226 -m, --mapcompat
221 !! 227 Allow loading maps with unknown map definitions.
222 -n, --nomount !! 228
223 Do not automatically attempt to mount any !! 229 -n, --nomount
224 tracefs or BPF virtual file system) when n !! 230 Do not automatically attempt to mount any virtual file system
225 !! 231 (such as tracefs or BPF virtual file system) when necessary.
226 -L, --use-loader !! 232
227 Load program as a "loader" program. This i !! 233 -L, --use-loader
228 of such programs. When this option is in u !! 234 Load program as a "loader" program. This is useful to debug
229 programs from the object file into the ker !! 235 the generation of such programs. When this option is in
230 (therefore, the *PATH* must not be provide !! 236 use, bpftool attempts to load the programs from the object
231 !! 237 file into the kernel, but does not pin them (therefore, the
232 When combined with the **-d**\ \|\ **--deb !! 238 *PATH* must not be provided).
233 messages are generated, and the execution !! 239
234 the **bpf_trace_printk**\ () helper to log !! 240 When combined with the **-d**\ \|\ **--debug** option,
235 creating the maps, and loading the program !! 241 additional debug messages are generated, and the execution
236 as a way to dump those messages). !! 242 of the loader program will use the **bpf_trace_printk**\ ()
>> 243 helper to log each step of loading BTF, creating the maps,
>> 244 and loading the programs (see **bpftool prog tracelog** as
>> 245 a way to dump those messages).
237 246
238 EXAMPLES 247 EXAMPLES
239 ======== 248 ========
240 **# bpftool prog show** 249 **# bpftool prog show**
241 250
242 :: 251 ::
243 252
244 10: xdp name some_prog tag 005a3d2123620 253 10: xdp name some_prog tag 005a3d2123620c8b gpl run_time_ns 81632 run_cnt 10
245 loaded_at 2017-09-29T20:11:00+0000 254 loaded_at 2017-09-29T20:11:00+0000 uid 0
246 xlated 528B jited 370B memlock 4 255 xlated 528B jited 370B memlock 4096B map_ids 10
247 pids systemd(1) 256 pids systemd(1)
248 257
249 **# bpftool --json --pretty prog show** 258 **# bpftool --json --pretty prog show**
250 259
251 :: 260 ::
252 261
253 [{ 262 [{
254 "id": 10, 263 "id": 10,
255 "type": "xdp", 264 "type": "xdp",
256 "tag": "005a3d2123620c8b", 265 "tag": "005a3d2123620c8b",
257 "gpl_compatible": true, 266 "gpl_compatible": true,
258 "run_time_ns": 81632, 267 "run_time_ns": 81632,
259 "run_cnt": 10, 268 "run_cnt": 10,
260 "loaded_at": 1506715860, 269 "loaded_at": 1506715860,
261 "uid": 0, 270 "uid": 0,
262 "bytes_xlated": 528, 271 "bytes_xlated": 528,
263 "jited": true, 272 "jited": true,
264 "bytes_jited": 370, 273 "bytes_jited": 370,
265 "bytes_memlock": 4096, 274 "bytes_memlock": 4096,
266 "map_ids": [10 275 "map_ids": [10
267 ], 276 ],
268 "pids": [{ 277 "pids": [{
269 "pid": 1, 278 "pid": 1,
270 "comm": "systemd" 279 "comm": "systemd"
271 } 280 }
272 ] 281 ]
273 } 282 }
274 ] 283 ]
275 284
276 | 285 |
277 | **# bpftool prog dump xlated id 10 file /tmp 286 | **# bpftool prog dump xlated id 10 file /tmp/t**
278 | **$ ls -l /tmp/t** 287 | **$ ls -l /tmp/t**
279 288
280 :: 289 ::
281 290
282 -rw------- 1 root root 560 Jul 22 01:42 /t 291 -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
283 292
284 **# bpftool prog dump jited tag 005a3d2123620c 293 **# bpftool prog dump jited tag 005a3d2123620c8b**
285 294
286 :: 295 ::
287 296
288 0: push %rbp 297 0: push %rbp
289 1: mov %rsp,%rbp 298 1: mov %rsp,%rbp
290 2: sub $0x228,%rsp 299 2: sub $0x228,%rsp
291 3: sub $0x28,%rbp 300 3: sub $0x28,%rbp
292 4: mov %rbx,0x0(%rbp) 301 4: mov %rbx,0x0(%rbp)
293 302
294 | 303 |
295 | **# mount -t bpf none /sys/fs/bpf/** 304 | **# mount -t bpf none /sys/fs/bpf/**
296 | **# bpftool prog pin id 10 /sys/fs/bpf/prog* 305 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
297 | **# bpftool prog load ./my_prog.o /sys/fs/bp 306 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
298 | **# ls -l /sys/fs/bpf/** 307 | **# ls -l /sys/fs/bpf/**
299 308
300 :: 309 ::
301 310
302 -rw------- 1 root root 0 Jul 22 01:43 prog 311 -rw------- 1 root root 0 Jul 22 01:43 prog
303 -rw------- 1 root root 0 Jul 22 01:44 prog 312 -rw------- 1 root root 0 Jul 22 01:44 prog2
304 313
305 **# bpftool prog dump jited pinned /sys/fs/bpf 314 **# bpftool prog dump jited pinned /sys/fs/bpf/prog opcodes**
306 315
307 :: 316 ::
308 317
309 0: push %rbp 318 0: push %rbp
310 55 319 55
311 1: mov %rsp,%rbp 320 1: mov %rsp,%rbp
312 48 89 e5 321 48 89 e5
313 4: sub $0x228,%rsp 322 4: sub $0x228,%rsp
314 48 81 ec 28 02 00 00 323 48 81 ec 28 02 00 00
315 b: sub $0x28,%rbp 324 b: sub $0x28,%rbp
316 48 83 ed 28 325 48 83 ed 28
317 f: mov %rbx,0x0(%rbp) 326 f: mov %rbx,0x0(%rbp)
318 48 89 5d 00 327 48 89 5d 00
319 328
320 | 329 |
321 | **# bpftool prog load xdp1_kern.o /sys/fs/bp 330 | **# 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 331 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
323 332
324 :: 333 ::
325 334
326 9: xdp name xdp_prog1 tag 539ec6ce11b52f 335 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
327 loaded_at 2018-06-25T16:17:31-0700 336 loaded_at 2018-06-25T16:17:31-0700 uid 0
328 xlated 488B jited 336B memlock 4 337 xlated 488B jited 336B memlock 4096B map_ids 7
329 338
330 **# rm /sys/fs/bpf/xdp1** 339 **# rm /sys/fs/bpf/xdp1**
331 340
332 | 341 |
333 | **# bpftool prog profile id 337 duration 10 342 | **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
334 343
335 :: 344 ::
336 345
337 51397 run_cnt 346 51397 run_cnt
338 40176203 cycles 347 40176203 cycles (83.05%)
339 42518139 instructions # 1.06 insns 348 42518139 instructions # 1.06 insns per cycle (83.39%)
340 123 llc_misses # 2.89 LLC mi 349 123 llc_misses # 2.89 LLC misses per million insns (83.15%)
341 350
342 | 351 |
343 | Output below is for the trace logs. 352 | Output below is for the trace logs.
344 | Run in separate terminals: 353 | Run in separate terminals:
345 | **# bpftool prog tracelog** 354 | **# bpftool prog tracelog**
346 | **# bpftool prog load -L -d file.o** 355 | **# bpftool prog load -L -d file.o**
347 356
348 :: 357 ::
349 358
350 bpftool-620059 [004] d... 2634685.517903: 359 bpftool-620059 [004] d... 2634685.517903: bpf_trace_printk: btf_load size 665 r=5
351 bpftool-620059 [004] d... 2634685.517912: 360 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: 361 bpftool-620059 [004] d... 2634685.517997: bpf_trace_printk: prog_load sample insn_cnt 13 r=7
353 bpftool-620059 [004] d... 2634685.517999: 362 bpftool-620059 [004] d... 2634685.517999: bpf_trace_printk: close(5) = 0
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