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Commit | Line | Data |
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16444a8a | 1 | # |
606576ce SR |
2 | # Architectures that offer an FUNCTION_TRACER implementation should |
3 | # select HAVE_FUNCTION_TRACER: | |
16444a8a | 4 | # |
2a3a4f66 | 5 | |
8d26487f TE |
6 | config USER_STACKTRACE_SUPPORT |
7 | bool | |
8 | ||
2a3a4f66 FW |
9 | config NOP_TRACER |
10 | bool | |
11 | ||
78d904b4 SR |
12 | config HAVE_FTRACE_NMI_ENTER |
13 | bool | |
555f386c | 14 | help |
40892367 | 15 | See Documentation/trace/ftrace-design.txt |
78d904b4 | 16 | |
606576ce | 17 | config HAVE_FUNCTION_TRACER |
16444a8a | 18 | bool |
555f386c | 19 | help |
40892367 | 20 | See Documentation/trace/ftrace-design.txt |
bc0c38d1 | 21 | |
fb52607a | 22 | config HAVE_FUNCTION_GRAPH_TRACER |
15e6cb36 | 23 | bool |
555f386c | 24 | help |
40892367 | 25 | See Documentation/trace/ftrace-design.txt |
15e6cb36 | 26 | |
71e308a2 SR |
27 | config HAVE_FUNCTION_GRAPH_FP_TEST |
28 | bool | |
29 | help | |
03688970 | 30 | See Documentation/trace/ftrace-design.txt |
71e308a2 | 31 | |
60a7ecf4 SR |
32 | config HAVE_FUNCTION_TRACE_MCOUNT_TEST |
33 | bool | |
34 | help | |
40892367 | 35 | See Documentation/trace/ftrace-design.txt |
60a7ecf4 | 36 | |
677aa9f7 SR |
37 | config HAVE_DYNAMIC_FTRACE |
38 | bool | |
555f386c | 39 | help |
40892367 | 40 | See Documentation/trace/ftrace-design.txt |
677aa9f7 | 41 | |
06aeaaea MH |
42 | config HAVE_DYNAMIC_FTRACE_WITH_REGS |
43 | bool | |
44 | ||
8da3821b SR |
45 | config HAVE_FTRACE_MCOUNT_RECORD |
46 | bool | |
555f386c | 47 | help |
40892367 | 48 | See Documentation/trace/ftrace-design.txt |
8da3821b | 49 | |
66700001 | 50 | config HAVE_SYSCALL_TRACEPOINTS |
ee08c6ec | 51 | bool |
555f386c | 52 | help |
40892367 | 53 | See Documentation/trace/ftrace-design.txt |
ee08c6ec | 54 | |
a2546fae SR |
55 | config HAVE_FENTRY |
56 | bool | |
57 | help | |
58 | Arch supports the gcc options -pg with -mfentry | |
59 | ||
cf4db259 | 60 | config HAVE_C_RECORDMCOUNT |
72441cb1 SR |
61 | bool |
62 | help | |
63 | C version of recordmcount available? | |
64 | ||
352ad25a SR |
65 | config TRACER_MAX_TRACE |
66 | bool | |
67 | ||
ea632e9f JT |
68 | config TRACE_CLOCK |
69 | bool | |
70 | ||
7a8e76a3 SR |
71 | config RING_BUFFER |
72 | bool | |
ea632e9f | 73 | select TRACE_CLOCK |
7a8e76a3 | 74 | |
78d904b4 SR |
75 | config FTRACE_NMI_ENTER |
76 | bool | |
77 | depends on HAVE_FTRACE_NMI_ENTER | |
78 | default y | |
79 | ||
5f77a88b | 80 | config EVENT_TRACING |
b11c53e1 Z |
81 | select CONTEXT_SWITCH_TRACER |
82 | bool | |
83 | ||
25e41933 TR |
84 | config EVENT_POWER_TRACING_DEPRECATED |
85 | depends on EVENT_TRACING | |
86 | bool "Deprecated power event trace API, to be removed" | |
87 | default y | |
88 | help | |
89 | Provides old power event types: | |
90 | C-state/idle accounting events: | |
91 | power:power_start | |
92 | power:power_end | |
93 | and old cpufreq accounting event: | |
94 | power:power_frequency | |
95 | This is for userspace compatibility | |
96 | and will vanish after 5 kernel iterations, | |
f629299b | 97 | namely 3.1. |
25e41933 | 98 | |
b11c53e1 | 99 | config CONTEXT_SWITCH_TRACER |
5f77a88b TZ |
100 | bool |
101 | ||
85bac32c SR |
102 | config RING_BUFFER_ALLOW_SWAP |
103 | bool | |
104 | help | |
105 | Allow the use of ring_buffer_swap_cpu. | |
106 | Adds a very slight overhead to tracing when enabled. | |
107 | ||
5e0a0939 SR |
108 | # All tracer options should select GENERIC_TRACER. For those options that are |
109 | # enabled by all tracers (context switch and event tracer) they select TRACING. | |
110 | # This allows those options to appear when no other tracer is selected. But the | |
111 | # options do not appear when something else selects it. We need the two options | |
112 | # GENERIC_TRACER and TRACING to avoid circular dependencies to accomplish the | |
40892367 | 113 | # hiding of the automatic options. |
5e0a0939 | 114 | |
bc0c38d1 SR |
115 | config TRACING |
116 | bool | |
117 | select DEBUG_FS | |
7a8e76a3 | 118 | select RING_BUFFER |
c2c80529 | 119 | select STACKTRACE if STACKTRACE_SUPPORT |
5f87f112 | 120 | select TRACEPOINTS |
f3384b28 | 121 | select NOP_TRACER |
769b0441 | 122 | select BINARY_PRINTF |
5f77a88b | 123 | select EVENT_TRACING |
ea632e9f | 124 | select TRACE_CLOCK |
0d5c6e1c | 125 | select IRQ_WORK |
bc0c38d1 | 126 | |
5e0a0939 SR |
127 | config GENERIC_TRACER |
128 | bool | |
129 | select TRACING | |
130 | ||
40ada30f IM |
131 | # |
132 | # Minimum requirements an architecture has to meet for us to | |
133 | # be able to offer generic tracing facilities: | |
134 | # | |
135 | config TRACING_SUPPORT | |
136 | bool | |
45b95608 AV |
137 | # PPC32 has no irqflags tracing support, but it can use most of the |
138 | # tracers anyway, they were tested to build and work. Note that new | |
139 | # exceptions to this list aren't welcomed, better implement the | |
140 | # irqflags tracing for your architecture. | |
141 | depends on TRACE_IRQFLAGS_SUPPORT || PPC32 | |
40ada30f | 142 | depends on STACKTRACE_SUPPORT |
422d3c7a | 143 | default y |
40ada30f IM |
144 | |
145 | if TRACING_SUPPORT | |
146 | ||
4ed9f071 SR |
147 | menuconfig FTRACE |
148 | bool "Tracers" | |
65b77242 | 149 | default y if DEBUG_KERNEL |
4ed9f071 | 150 | help |
40892367 | 151 | Enable the kernel tracing infrastructure. |
4ed9f071 SR |
152 | |
153 | if FTRACE | |
17d80fd0 | 154 | |
606576ce | 155 | config FUNCTION_TRACER |
1b29b018 | 156 | bool "Kernel Function Tracer" |
606576ce | 157 | depends on HAVE_FUNCTION_TRACER |
4d7a077c | 158 | select KALLSYMS |
5e0a0939 | 159 | select GENERIC_TRACER |
35e8e302 | 160 | select CONTEXT_SWITCH_TRACER |
1b29b018 SR |
161 | help |
162 | Enable the kernel to trace every kernel function. This is done | |
163 | by using a compiler feature to insert a small, 5-byte No-Operation | |
40892367 | 164 | instruction at the beginning of every kernel function, which NOP |
1b29b018 SR |
165 | sequence is then dynamically patched into a tracer call when |
166 | tracing is enabled by the administrator. If it's runtime disabled | |
167 | (the bootup default), then the overhead of the instructions is very | |
168 | small and not measurable even in micro-benchmarks. | |
35e8e302 | 169 | |
fb52607a FW |
170 | config FUNCTION_GRAPH_TRACER |
171 | bool "Kernel Function Graph Tracer" | |
172 | depends on HAVE_FUNCTION_GRAPH_TRACER | |
15e6cb36 | 173 | depends on FUNCTION_TRACER |
eb4a0378 | 174 | depends on !X86_32 || !CC_OPTIMIZE_FOR_SIZE |
764f3b95 | 175 | default y |
15e6cb36 | 176 | help |
fb52607a FW |
177 | Enable the kernel to trace a function at both its return |
178 | and its entry. | |
692105b8 ML |
179 | Its first purpose is to trace the duration of functions and |
180 | draw a call graph for each thread with some information like | |
40892367 | 181 | the return value. This is done by setting the current return |
692105b8 | 182 | address on the current task structure into a stack of calls. |
15e6cb36 | 183 | |
bac429f0 | 184 | |
81d68a96 SR |
185 | config IRQSOFF_TRACER |
186 | bool "Interrupts-off Latency Tracer" | |
187 | default n | |
188 | depends on TRACE_IRQFLAGS_SUPPORT | |
592913ec | 189 | depends on !ARCH_USES_GETTIMEOFFSET |
81d68a96 | 190 | select TRACE_IRQFLAGS |
5e0a0939 | 191 | select GENERIC_TRACER |
81d68a96 | 192 | select TRACER_MAX_TRACE |
85bac32c | 193 | select RING_BUFFER_ALLOW_SWAP |
22cffc2b | 194 | select TRACER_SNAPSHOT |
0b85ffc2 | 195 | select TRACER_SNAPSHOT_PER_CPU_SWAP |
81d68a96 SR |
196 | help |
197 | This option measures the time spent in irqs-off critical | |
198 | sections, with microsecond accuracy. | |
199 | ||
200 | The default measurement method is a maximum search, which is | |
201 | disabled by default and can be runtime (re-)started | |
202 | via: | |
203 | ||
156f5a78 | 204 | echo 0 > /sys/kernel/debug/tracing/tracing_max_latency |
81d68a96 | 205 | |
40892367 | 206 | (Note that kernel size and overhead increase with this option |
6cd8a4bb SR |
207 | enabled. This option and the preempt-off timing option can be |
208 | used together or separately.) | |
209 | ||
210 | config PREEMPT_TRACER | |
211 | bool "Preemption-off Latency Tracer" | |
212 | default n | |
592913ec | 213 | depends on !ARCH_USES_GETTIMEOFFSET |
6cd8a4bb | 214 | depends on PREEMPT |
5e0a0939 | 215 | select GENERIC_TRACER |
6cd8a4bb | 216 | select TRACER_MAX_TRACE |
85bac32c | 217 | select RING_BUFFER_ALLOW_SWAP |
22cffc2b | 218 | select TRACER_SNAPSHOT |
0b85ffc2 | 219 | select TRACER_SNAPSHOT_PER_CPU_SWAP |
6cd8a4bb | 220 | help |
40892367 | 221 | This option measures the time spent in preemption-off critical |
6cd8a4bb SR |
222 | sections, with microsecond accuracy. |
223 | ||
224 | The default measurement method is a maximum search, which is | |
225 | disabled by default and can be runtime (re-)started | |
226 | via: | |
227 | ||
156f5a78 | 228 | echo 0 > /sys/kernel/debug/tracing/tracing_max_latency |
6cd8a4bb | 229 | |
40892367 | 230 | (Note that kernel size and overhead increase with this option |
6cd8a4bb SR |
231 | enabled. This option and the irqs-off timing option can be |
232 | used together or separately.) | |
233 | ||
352ad25a SR |
234 | config SCHED_TRACER |
235 | bool "Scheduling Latency Tracer" | |
5e0a0939 | 236 | select GENERIC_TRACER |
352ad25a SR |
237 | select CONTEXT_SWITCH_TRACER |
238 | select TRACER_MAX_TRACE | |
22cffc2b | 239 | select TRACER_SNAPSHOT |
352ad25a SR |
240 | help |
241 | This tracer tracks the latency of the highest priority task | |
242 | to be scheduled in, starting from the point it has woken up. | |
243 | ||
897f17a6 SR |
244 | config ENABLE_DEFAULT_TRACERS |
245 | bool "Trace process context switches and events" | |
5e0a0939 | 246 | depends on !GENERIC_TRACER |
b77e38aa SR |
247 | select TRACING |
248 | help | |
40892367 | 249 | This tracer hooks to various trace points in the kernel, |
b77e38aa | 250 | allowing the user to pick and choose which trace point they |
897f17a6 | 251 | want to trace. It also includes the sched_switch tracer plugin. |
a7abe97f | 252 | |
ee08c6ec FW |
253 | config FTRACE_SYSCALLS |
254 | bool "Trace syscalls" | |
66700001 | 255 | depends on HAVE_SYSCALL_TRACEPOINTS |
5e0a0939 | 256 | select GENERIC_TRACER |
0ea1c415 | 257 | select KALLSYMS |
ee08c6ec FW |
258 | help |
259 | Basic tracer to catch the syscall entry and exit events. | |
260 | ||
debdd57f HT |
261 | config TRACER_SNAPSHOT |
262 | bool "Create a snapshot trace buffer" | |
263 | select TRACER_MAX_TRACE | |
264 | help | |
265 | Allow tracing users to take snapshot of the current buffer using the | |
266 | ftrace interface, e.g.: | |
267 | ||
268 | echo 1 > /sys/kernel/debug/tracing/snapshot | |
269 | cat snapshot | |
270 | ||
0b85ffc2 SRRH |
271 | config TRACER_SNAPSHOT_PER_CPU_SWAP |
272 | bool "Allow snapshot to swap per CPU" | |
273 | depends on TRACER_SNAPSHOT | |
274 | select RING_BUFFER_ALLOW_SWAP | |
275 | help | |
276 | Allow doing a snapshot of a single CPU buffer instead of a | |
277 | full swap (all buffers). If this is set, then the following is | |
278 | allowed: | |
279 | ||
280 | echo 1 > /sys/kernel/debug/tracing/per_cpu/cpu2/snapshot | |
281 | ||
282 | After which, only the tracing buffer for CPU 2 was swapped with | |
283 | the main tracing buffer, and the other CPU buffers remain the same. | |
284 | ||
285 | When this is enabled, this adds a little more overhead to the | |
286 | trace recording, as it needs to add some checks to synchronize | |
287 | recording with swaps. But this does not affect the performance | |
288 | of the overall system. This is enabled by default when the preempt | |
289 | or irq latency tracers are enabled, as those need to swap as well | |
290 | and already adds the overhead (plus a lot more). | |
291 | ||
2ed84eeb | 292 | config TRACE_BRANCH_PROFILING |
9ae5b879 | 293 | bool |
5e0a0939 | 294 | select GENERIC_TRACER |
9ae5b879 SR |
295 | |
296 | choice | |
297 | prompt "Branch Profiling" | |
298 | default BRANCH_PROFILE_NONE | |
299 | help | |
300 | The branch profiling is a software profiler. It will add hooks | |
301 | into the C conditionals to test which path a branch takes. | |
302 | ||
303 | The likely/unlikely profiler only looks at the conditions that | |
304 | are annotated with a likely or unlikely macro. | |
305 | ||
40892367 | 306 | The "all branch" profiler will profile every if-statement in the |
9ae5b879 | 307 | kernel. This profiler will also enable the likely/unlikely |
40892367 | 308 | profiler. |
9ae5b879 | 309 | |
40892367 RD |
310 | Either of the above profilers adds a bit of overhead to the system. |
311 | If unsure, choose "No branch profiling". | |
9ae5b879 SR |
312 | |
313 | config BRANCH_PROFILE_NONE | |
314 | bool "No branch profiling" | |
315 | help | |
40892367 RD |
316 | No branch profiling. Branch profiling adds a bit of overhead. |
317 | Only enable it if you want to analyse the branching behavior. | |
318 | Otherwise keep it disabled. | |
9ae5b879 SR |
319 | |
320 | config PROFILE_ANNOTATED_BRANCHES | |
321 | bool "Trace likely/unlikely profiler" | |
322 | select TRACE_BRANCH_PROFILING | |
1f0d69a9 | 323 | help |
59bf8964 | 324 | This tracer profiles all likely and unlikely macros |
1f0d69a9 SR |
325 | in the kernel. It will display the results in: |
326 | ||
13e5befa | 327 | /sys/kernel/debug/tracing/trace_stat/branch_annotated |
1f0d69a9 | 328 | |
40892367 | 329 | Note: this will add a significant overhead; only turn this |
1f0d69a9 SR |
330 | on if you need to profile the system's use of these macros. |
331 | ||
2bcd521a SR |
332 | config PROFILE_ALL_BRANCHES |
333 | bool "Profile all if conditionals" | |
9ae5b879 | 334 | select TRACE_BRANCH_PROFILING |
2bcd521a SR |
335 | help |
336 | This tracer profiles all branch conditions. Every if () | |
337 | taken in the kernel is recorded whether it hit or miss. | |
338 | The results will be displayed in: | |
339 | ||
13e5befa | 340 | /sys/kernel/debug/tracing/trace_stat/branch_all |
2bcd521a | 341 | |
9ae5b879 SR |
342 | This option also enables the likely/unlikely profiler. |
343 | ||
2bcd521a SR |
344 | This configuration, when enabled, will impose a great overhead |
345 | on the system. This should only be enabled when the system | |
40892367 | 346 | is to be analyzed in much detail. |
9ae5b879 | 347 | endchoice |
2bcd521a | 348 | |
2ed84eeb | 349 | config TRACING_BRANCHES |
52f232cb SR |
350 | bool |
351 | help | |
352 | Selected by tracers that will trace the likely and unlikely | |
353 | conditions. This prevents the tracers themselves from being | |
354 | profiled. Profiling the tracing infrastructure can only happen | |
355 | when the likelys and unlikelys are not being traced. | |
356 | ||
2ed84eeb | 357 | config BRANCH_TRACER |
52f232cb | 358 | bool "Trace likely/unlikely instances" |
2ed84eeb SR |
359 | depends on TRACE_BRANCH_PROFILING |
360 | select TRACING_BRANCHES | |
52f232cb SR |
361 | help |
362 | This traces the events of likely and unlikely condition | |
363 | calls in the kernel. The difference between this and the | |
364 | "Trace likely/unlikely profiler" is that this is not a | |
365 | histogram of the callers, but actually places the calling | |
366 | events into a running trace buffer to see when and where the | |
367 | events happened, as well as their results. | |
368 | ||
369 | Say N if unsure. | |
370 | ||
e5a81b62 SR |
371 | config STACK_TRACER |
372 | bool "Trace max stack" | |
606576ce | 373 | depends on HAVE_FUNCTION_TRACER |
606576ce | 374 | select FUNCTION_TRACER |
e5a81b62 | 375 | select STACKTRACE |
4d7a077c | 376 | select KALLSYMS |
e5a81b62 | 377 | help |
4519d9e5 | 378 | This special tracer records the maximum stack footprint of the |
156f5a78 | 379 | kernel and displays it in /sys/kernel/debug/tracing/stack_trace. |
4519d9e5 IM |
380 | |
381 | This tracer works by hooking into every function call that the | |
382 | kernel executes, and keeping a maximum stack depth value and | |
f38f1d2a SR |
383 | stack-trace saved. If this is configured with DYNAMIC_FTRACE |
384 | then it will not have any overhead while the stack tracer | |
385 | is disabled. | |
386 | ||
387 | To enable the stack tracer on bootup, pass in 'stacktrace' | |
388 | on the kernel command line. | |
389 | ||
390 | The stack tracer can also be enabled or disabled via the | |
391 | sysctl kernel.stack_tracer_enabled | |
4519d9e5 IM |
392 | |
393 | Say N if unsure. | |
e5a81b62 | 394 | |
2db270a8 | 395 | config BLK_DEV_IO_TRACE |
40892367 | 396 | bool "Support for tracing block IO actions" |
2db270a8 | 397 | depends on SYSFS |
1dfba05d | 398 | depends on BLOCK |
2db270a8 FW |
399 | select RELAY |
400 | select DEBUG_FS | |
401 | select TRACEPOINTS | |
5e0a0939 | 402 | select GENERIC_TRACER |
2db270a8 FW |
403 | select STACKTRACE |
404 | help | |
405 | Say Y here if you want to be able to trace the block layer actions | |
406 | on a given queue. Tracing allows you to see any traffic happening | |
407 | on a block device queue. For more information (and the userspace | |
408 | support tools needed), fetch the blktrace tools from: | |
409 | ||
410 | git://git.kernel.dk/blktrace.git | |
411 | ||
412 | Tracing also is possible using the ftrace interface, e.g.: | |
413 | ||
414 | echo 1 > /sys/block/sda/sda1/trace/enable | |
415 | echo blk > /sys/kernel/debug/tracing/current_tracer | |
416 | cat /sys/kernel/debug/tracing/trace_pipe | |
417 | ||
418 | If unsure, say N. | |
36994e58 | 419 | |
77b44d1b | 420 | config KPROBE_EVENT |
413d37d1 | 421 | depends on KPROBES |
f850c30c | 422 | depends on HAVE_REGS_AND_STACK_ACCESS_API |
77b44d1b | 423 | bool "Enable kprobes-based dynamic events" |
413d37d1 | 424 | select TRACING |
8ab83f56 | 425 | select PROBE_EVENTS |
77b44d1b | 426 | default y |
413d37d1 | 427 | help |
40892367 RD |
428 | This allows the user to add tracing events (similar to tracepoints) |
429 | on the fly via the ftrace interface. See | |
430 | Documentation/trace/kprobetrace.txt for more details. | |
77b44d1b MH |
431 | |
432 | Those events can be inserted wherever kprobes can probe, and record | |
433 | various register and memory values. | |
434 | ||
40892367 RD |
435 | This option is also required by perf-probe subcommand of perf tools. |
436 | If you want to use perf tools, this option is strongly recommended. | |
413d37d1 | 437 | |
f3f096cf SD |
438 | config UPROBE_EVENT |
439 | bool "Enable uprobes-based dynamic events" | |
440 | depends on ARCH_SUPPORTS_UPROBES | |
441 | depends on MMU | |
442 | select UPROBES | |
443 | select PROBE_EVENTS | |
444 | select TRACING | |
445 | default n | |
446 | help | |
447 | This allows the user to add tracing events on top of userspace | |
448 | dynamic events (similar to tracepoints) on the fly via the trace | |
449 | events interface. Those events can be inserted wherever uprobes | |
450 | can probe, and record various registers. | |
451 | This option is required if you plan to use perf-probe subcommand | |
452 | of perf tools on user space applications. | |
453 | ||
8ab83f56 SD |
454 | config PROBE_EVENTS |
455 | def_bool n | |
456 | ||
3d083395 | 457 | config DYNAMIC_FTRACE |
db05021d | 458 | bool "enable/disable function tracing dynamically" |
606576ce | 459 | depends on FUNCTION_TRACER |
677aa9f7 | 460 | depends on HAVE_DYNAMIC_FTRACE |
3d083395 SR |
461 | default y |
462 | help | |
db05021d SR |
463 | This option will modify all the calls to function tracing |
464 | dynamically (will patch them out of the binary image and | |
465 | replace them with a No-Op instruction) on boot up. During | |
466 | compile time, a table is made of all the locations that ftrace | |
467 | can function trace, and this table is linked into the kernel | |
468 | image. When this is enabled, functions can be individually | |
469 | enabled, and the functions not enabled will not affect | |
470 | performance of the system. | |
471 | ||
472 | See the files in /sys/kernel/debug/tracing: | |
473 | available_filter_functions | |
474 | set_ftrace_filter | |
475 | set_ftrace_notrace | |
3d083395 | 476 | |
40892367 RD |
477 | This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but |
478 | otherwise has native performance as long as no tracing is active. | |
3d083395 | 479 | |
06aeaaea MH |
480 | config DYNAMIC_FTRACE_WITH_REGS |
481 | def_bool y | |
482 | depends on DYNAMIC_FTRACE | |
483 | depends on HAVE_DYNAMIC_FTRACE_WITH_REGS | |
484 | ||
bac429f0 SR |
485 | config FUNCTION_PROFILER |
486 | bool "Kernel function profiler" | |
493762fc | 487 | depends on FUNCTION_TRACER |
bac429f0 SR |
488 | default n |
489 | help | |
40892367 RD |
490 | This option enables the kernel function profiler. A file is created |
491 | in debugfs called function_profile_enabled which defaults to zero. | |
492 | When a 1 is echoed into this file profiling begins, and when a | |
493 | zero is entered, profiling stops. A "functions" file is created in | |
494 | the trace_stats directory; this file shows the list of functions that | |
495 | have been hit and their counters. | |
bac429f0 | 496 | |
40892367 | 497 | If in doubt, say N. |
bac429f0 | 498 | |
8da3821b SR |
499 | config FTRACE_MCOUNT_RECORD |
500 | def_bool y | |
501 | depends on DYNAMIC_FTRACE | |
502 | depends on HAVE_FTRACE_MCOUNT_RECORD | |
503 | ||
60a11774 SR |
504 | config FTRACE_SELFTEST |
505 | bool | |
506 | ||
507 | config FTRACE_STARTUP_TEST | |
508 | bool "Perform a startup test on ftrace" | |
5e0a0939 | 509 | depends on GENERIC_TRACER |
60a11774 SR |
510 | select FTRACE_SELFTEST |
511 | help | |
512 | This option performs a series of startup tests on ftrace. On bootup | |
513 | a series of tests are made to verify that the tracer is | |
514 | functioning properly. It will do tests on all the configured | |
515 | tracers of ftrace. | |
17d80fd0 | 516 | |
1f5a6b45 SR |
517 | config EVENT_TRACE_TEST_SYSCALLS |
518 | bool "Run selftest on syscall events" | |
519 | depends on FTRACE_STARTUP_TEST | |
520 | help | |
521 | This option will also enable testing every syscall event. | |
522 | It only enables the event and disables it and runs various loads | |
523 | with the event enabled. This adds a bit more time for kernel boot | |
524 | up since it runs this on every system call defined. | |
525 | ||
526 | TBD - enable a way to actually call the syscalls as we test their | |
527 | events | |
528 | ||
fe6f90e5 PP |
529 | config MMIOTRACE |
530 | bool "Memory mapped IO tracing" | |
40ada30f | 531 | depends on HAVE_MMIOTRACE_SUPPORT && PCI |
5e0a0939 | 532 | select GENERIC_TRACER |
fe6f90e5 PP |
533 | help |
534 | Mmiotrace traces Memory Mapped I/O access and is meant for | |
535 | debugging and reverse engineering. It is called from the ioremap | |
536 | implementation and works via page faults. Tracing is disabled by | |
537 | default and can be enabled at run-time. | |
538 | ||
4d1f4372 | 539 | See Documentation/trace/mmiotrace.txt. |
fe6f90e5 PP |
540 | If you are not helping to develop drivers, say N. |
541 | ||
542 | config MMIOTRACE_TEST | |
543 | tristate "Test module for mmiotrace" | |
544 | depends on MMIOTRACE && m | |
545 | help | |
546 | This is a dumb module for testing mmiotrace. It is very dangerous | |
547 | as it will write garbage to IO memory starting at a given address. | |
548 | However, it should be safe to use on e.g. unused portion of VRAM. | |
549 | ||
550 | Say N, unless you absolutely know what you are doing. | |
551 | ||
5092dbc9 SR |
552 | config RING_BUFFER_BENCHMARK |
553 | tristate "Ring buffer benchmark stress tester" | |
554 | depends on RING_BUFFER | |
555 | help | |
40892367 RD |
556 | This option creates a test to stress the ring buffer and benchmark it. |
557 | It creates its own ring buffer such that it will not interfere with | |
5092dbc9 SR |
558 | any other users of the ring buffer (such as ftrace). It then creates |
559 | a producer and consumer that will run for 10 seconds and sleep for | |
560 | 10 seconds. Each interval it will print out the number of events | |
561 | it recorded and give a rough estimate of how long each iteration took. | |
562 | ||
563 | It does not disable interrupts or raise its priority, so it may be | |
564 | affected by processes that are running. | |
565 | ||
40892367 | 566 | If unsure, say N. |
5092dbc9 | 567 | |
4ed9f071 | 568 | endif # FTRACE |
40ada30f IM |
569 | |
570 | endif # TRACING_SUPPORT | |
571 |