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2224d848 SP |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* | |
3 | * DAMON api | |
4 | * | |
5 | * Author: SeongJae Park <sjpark@amazon.de> | |
6 | */ | |
7 | ||
8 | #ifndef _DAMON_H_ | |
9 | #define _DAMON_H_ | |
10 | ||
11 | #include <linux/mutex.h> | |
12 | #include <linux/time64.h> | |
13 | #include <linux/types.h> | |
14 | ||
b9a6ac4e SP |
15 | /* Minimal region size. Every damon_region is aligned by this. */ |
16 | #define DAMON_MIN_REGION PAGE_SIZE | |
38683e00 SP |
17 | /* Max priority score for DAMON-based operation schemes */ |
18 | #define DAMOS_MAX_SCORE (99) | |
b9a6ac4e | 19 | |
f23b8eee SP |
20 | /** |
21 | * struct damon_addr_range - Represents an address region of [@start, @end). | |
22 | * @start: Start address of the region (inclusive). | |
23 | * @end: End address of the region (exclusive). | |
24 | */ | |
25 | struct damon_addr_range { | |
26 | unsigned long start; | |
27 | unsigned long end; | |
28 | }; | |
29 | ||
30 | /** | |
31 | * struct damon_region - Represents a monitoring target region. | |
32 | * @ar: The address range of the region. | |
33 | * @sampling_addr: Address of the sample for the next access check. | |
34 | * @nr_accesses: Access frequency of this region. | |
35 | * @list: List head for siblings. | |
fda504fa SP |
36 | * @age: Age of this region. |
37 | * | |
38 | * @age is initially zero, increased for each aggregation interval, and reset | |
39 | * to zero again if the access frequency is significantly changed. If two | |
40 | * regions are merged into a new region, both @nr_accesses and @age of the new | |
41 | * region are set as region size-weighted average of those of the two regions. | |
f23b8eee SP |
42 | */ |
43 | struct damon_region { | |
44 | struct damon_addr_range ar; | |
45 | unsigned long sampling_addr; | |
46 | unsigned int nr_accesses; | |
47 | struct list_head list; | |
fda504fa SP |
48 | |
49 | unsigned int age; | |
50 | /* private: Internal value for age calculation. */ | |
51 | unsigned int last_nr_accesses; | |
f23b8eee SP |
52 | }; |
53 | ||
54 | /** | |
55 | * struct damon_target - Represents a monitoring target. | |
56 | * @id: Unique identifier for this target. | |
b9a6ac4e | 57 | * @nr_regions: Number of monitoring target regions of this target. |
f23b8eee SP |
58 | * @regions_list: Head of the monitoring target regions of this target. |
59 | * @list: List head for siblings. | |
60 | * | |
61 | * Each monitoring context could have multiple targets. For example, a context | |
62 | * for virtual memory address spaces could have multiple target processes. The | |
63 | * @id of each target should be unique among the targets of the context. For | |
64 | * example, in the virtual address monitoring context, it could be a pidfd or | |
65 | * an address of an mm_struct. | |
66 | */ | |
67 | struct damon_target { | |
68 | unsigned long id; | |
b9a6ac4e | 69 | unsigned int nr_regions; |
f23b8eee SP |
70 | struct list_head regions_list; |
71 | struct list_head list; | |
72 | }; | |
73 | ||
1f366e42 SP |
74 | /** |
75 | * enum damos_action - Represents an action of a Data Access Monitoring-based | |
76 | * Operation Scheme. | |
77 | * | |
78 | * @DAMOS_WILLNEED: Call ``madvise()`` for the region with MADV_WILLNEED. | |
79 | * @DAMOS_COLD: Call ``madvise()`` for the region with MADV_COLD. | |
80 | * @DAMOS_PAGEOUT: Call ``madvise()`` for the region with MADV_PAGEOUT. | |
81 | * @DAMOS_HUGEPAGE: Call ``madvise()`` for the region with MADV_HUGEPAGE. | |
82 | * @DAMOS_NOHUGEPAGE: Call ``madvise()`` for the region with MADV_NOHUGEPAGE. | |
2f0b548c | 83 | * @DAMOS_STAT: Do nothing but count the stat. |
1f366e42 SP |
84 | */ |
85 | enum damos_action { | |
86 | DAMOS_WILLNEED, | |
87 | DAMOS_COLD, | |
88 | DAMOS_PAGEOUT, | |
89 | DAMOS_HUGEPAGE, | |
90 | DAMOS_NOHUGEPAGE, | |
2f0b548c | 91 | DAMOS_STAT, /* Do nothing but only record the stat */ |
1f366e42 SP |
92 | }; |
93 | ||
2b8a248d SP |
94 | /** |
95 | * struct damos_quota - Controls the aggressiveness of the given scheme. | |
1cd24303 | 96 | * @ms: Maximum milliseconds that the scheme can use. |
2b8a248d SP |
97 | * @sz: Maximum bytes of memory that the action can be applied. |
98 | * @reset_interval: Charge reset interval in milliseconds. | |
99 | * | |
38683e00 SP |
100 | * @weight_sz: Weight of the region's size for prioritization. |
101 | * @weight_nr_accesses: Weight of the region's nr_accesses for prioritization. | |
102 | * @weight_age: Weight of the region's age for prioritization. | |
103 | * | |
2b8a248d | 104 | * To avoid consuming too much CPU time or IO resources for applying the |
1cd24303 SP |
105 | * &struct damos->action to large memory, DAMON allows users to set time and/or |
106 | * size quotas. The quotas can be set by writing non-zero values to &ms and | |
107 | * &sz, respectively. If the time quota is set, DAMON tries to use only up to | |
108 | * &ms milliseconds within &reset_interval for applying the action. If the | |
109 | * size quota is set, DAMON tries to apply the action only up to &sz bytes | |
110 | * within &reset_interval. | |
111 | * | |
112 | * Internally, the time quota is transformed to a size quota using estimated | |
113 | * throughput of the scheme's action. DAMON then compares it against &sz and | |
114 | * uses smaller one as the effective quota. | |
38683e00 SP |
115 | * |
116 | * For selecting regions within the quota, DAMON prioritizes current scheme's | |
117 | * target memory regions using the &struct damon_primitive->get_scheme_score. | |
118 | * You could customize the prioritization logic by setting &weight_sz, | |
119 | * &weight_nr_accesses, and &weight_age, because monitoring primitives are | |
120 | * encouraged to respect those. | |
2b8a248d SP |
121 | */ |
122 | struct damos_quota { | |
1cd24303 | 123 | unsigned long ms; |
2b8a248d SP |
124 | unsigned long sz; |
125 | unsigned long reset_interval; | |
126 | ||
38683e00 SP |
127 | unsigned int weight_sz; |
128 | unsigned int weight_nr_accesses; | |
129 | unsigned int weight_age; | |
130 | ||
1cd24303 SP |
131 | /* private: */ |
132 | /* For throughput estimation */ | |
133 | unsigned long total_charged_sz; | |
134 | unsigned long total_charged_ns; | |
135 | ||
136 | unsigned long esz; /* Effective size quota in bytes */ | |
137 | ||
138 | /* For charging the quota */ | |
2b8a248d SP |
139 | unsigned long charged_sz; |
140 | unsigned long charged_from; | |
50585192 SP |
141 | struct damon_target *charge_target_from; |
142 | unsigned long charge_addr_from; | |
38683e00 SP |
143 | |
144 | /* For prioritization */ | |
145 | unsigned long histogram[DAMOS_MAX_SCORE + 1]; | |
146 | unsigned int min_score; | |
2b8a248d SP |
147 | }; |
148 | ||
ee801b7d SP |
149 | /** |
150 | * enum damos_wmark_metric - Represents the watermark metric. | |
151 | * | |
152 | * @DAMOS_WMARK_NONE: Ignore the watermarks of the given scheme. | |
153 | * @DAMOS_WMARK_FREE_MEM_RATE: Free memory rate of the system in [0,1000]. | |
154 | */ | |
155 | enum damos_wmark_metric { | |
156 | DAMOS_WMARK_NONE, | |
157 | DAMOS_WMARK_FREE_MEM_RATE, | |
158 | }; | |
159 | ||
160 | /** | |
161 | * struct damos_watermarks - Controls when a given scheme should be activated. | |
162 | * @metric: Metric for the watermarks. | |
163 | * @interval: Watermarks check time interval in microseconds. | |
164 | * @high: High watermark. | |
165 | * @mid: Middle watermark. | |
166 | * @low: Low watermark. | |
167 | * | |
168 | * If &metric is &DAMOS_WMARK_NONE, the scheme is always active. Being active | |
169 | * means DAMON does monitoring and applying the action of the scheme to | |
170 | * appropriate memory regions. Else, DAMON checks &metric of the system for at | |
171 | * least every &interval microseconds and works as below. | |
172 | * | |
173 | * If &metric is higher than &high, the scheme is inactivated. If &metric is | |
174 | * between &mid and &low, the scheme is activated. If &metric is lower than | |
175 | * &low, the scheme is inactivated. | |
176 | */ | |
177 | struct damos_watermarks { | |
178 | enum damos_wmark_metric metric; | |
179 | unsigned long interval; | |
180 | unsigned long high; | |
181 | unsigned long mid; | |
182 | unsigned long low; | |
183 | ||
184 | /* private: */ | |
185 | bool activated; | |
186 | }; | |
187 | ||
1f366e42 SP |
188 | /** |
189 | * struct damos - Represents a Data Access Monitoring-based Operation Scheme. | |
190 | * @min_sz_region: Minimum size of target regions. | |
191 | * @max_sz_region: Maximum size of target regions. | |
192 | * @min_nr_accesses: Minimum ``->nr_accesses`` of target regions. | |
193 | * @max_nr_accesses: Maximum ``->nr_accesses`` of target regions. | |
194 | * @min_age_region: Minimum age of target regions. | |
195 | * @max_age_region: Maximum age of target regions. | |
196 | * @action: &damo_action to be applied to the target regions. | |
2b8a248d | 197 | * @quota: Control the aggressiveness of this scheme. |
ee801b7d | 198 | * @wmarks: Watermarks for automated (in)activation of this scheme. |
2f0b548c SP |
199 | * @stat_count: Total number of regions that this scheme is applied. |
200 | * @stat_sz: Total size of regions that this scheme is applied. | |
1f366e42 SP |
201 | * @list: List head for siblings. |
202 | * | |
2b8a248d SP |
203 | * For each aggregation interval, DAMON finds regions which fit in the |
204 | * condition (&min_sz_region, &max_sz_region, &min_nr_accesses, | |
205 | * &max_nr_accesses, &min_age_region, &max_age_region) and applies &action to | |
206 | * those. To avoid consuming too much CPU time or IO resources for the | |
207 | * &action, "a is used. | |
208 | * | |
ee801b7d SP |
209 | * To do the work only when needed, schemes can be activated for specific |
210 | * system situations using &wmarks. If all schemes that registered to the | |
211 | * monitoring context are inactive, DAMON stops monitoring either, and just | |
212 | * repeatedly checks the watermarks. | |
213 | * | |
214 | * If all schemes that registered to a &struct damon_ctx are inactive, DAMON | |
215 | * stops monitoring and just repeatedly checks the watermarks. | |
216 | * | |
2b8a248d SP |
217 | * After applying the &action to each region, &stat_count and &stat_sz is |
218 | * updated to reflect the number of regions and total size of regions that the | |
219 | * &action is applied. | |
1f366e42 SP |
220 | */ |
221 | struct damos { | |
222 | unsigned long min_sz_region; | |
223 | unsigned long max_sz_region; | |
224 | unsigned int min_nr_accesses; | |
225 | unsigned int max_nr_accesses; | |
226 | unsigned int min_age_region; | |
227 | unsigned int max_age_region; | |
228 | enum damos_action action; | |
2b8a248d | 229 | struct damos_quota quota; |
ee801b7d | 230 | struct damos_watermarks wmarks; |
2f0b548c SP |
231 | unsigned long stat_count; |
232 | unsigned long stat_sz; | |
1f366e42 SP |
233 | struct list_head list; |
234 | }; | |
235 | ||
2224d848 SP |
236 | struct damon_ctx; |
237 | ||
238 | /** | |
d2f272b3 | 239 | * struct damon_primitive - Monitoring primitives for given use cases. |
2224d848 SP |
240 | * |
241 | * @init: Initialize primitive-internal data structures. | |
242 | * @update: Update primitive-internal data structures. | |
243 | * @prepare_access_checks: Prepare next access check of target regions. | |
244 | * @check_accesses: Check the accesses to target regions. | |
245 | * @reset_aggregated: Reset aggregated accesses monitoring results. | |
38683e00 | 246 | * @get_scheme_score: Get the score of a region for a scheme. |
1f366e42 | 247 | * @apply_scheme: Apply a DAMON-based operation scheme. |
2224d848 SP |
248 | * @target_valid: Determine if the target is valid. |
249 | * @cleanup: Clean up the context. | |
250 | * | |
251 | * DAMON can be extended for various address spaces and usages. For this, | |
252 | * users should register the low level primitives for their target address | |
253 | * space and usecase via the &damon_ctx.primitive. Then, the monitoring thread | |
254 | * (&damon_ctx.kdamond) calls @init and @prepare_access_checks before starting | |
255 | * the monitoring, @update after each &damon_ctx.primitive_update_interval, and | |
256 | * @check_accesses, @target_valid and @prepare_access_checks after each | |
257 | * &damon_ctx.sample_interval. Finally, @reset_aggregated is called after each | |
258 | * &damon_ctx.aggr_interval. | |
259 | * | |
260 | * @init should initialize primitive-internal data structures. For example, | |
261 | * this could be used to construct proper monitoring target regions and link | |
f23b8eee | 262 | * those to @damon_ctx.adaptive_targets. |
2224d848 SP |
263 | * @update should update the primitive-internal data structures. For example, |
264 | * this could be used to update monitoring target regions for current status. | |
265 | * @prepare_access_checks should manipulate the monitoring regions to be | |
266 | * prepared for the next access check. | |
267 | * @check_accesses should check the accesses to each region that made after the | |
268 | * last preparation and update the number of observed accesses of each region. | |
b9a6ac4e SP |
269 | * It should also return max number of observed accesses that made as a result |
270 | * of its update. The value will be used for regions adjustment threshold. | |
2224d848 SP |
271 | * @reset_aggregated should reset the access monitoring results that aggregated |
272 | * by @check_accesses. | |
38683e00 SP |
273 | * @get_scheme_score should return the priority score of a region for a scheme |
274 | * as an integer in [0, &DAMOS_MAX_SCORE]. | |
1f366e42 SP |
275 | * @apply_scheme is called from @kdamond when a region for user provided |
276 | * DAMON-based operation scheme is found. It should apply the scheme's action | |
277 | * to the region. This is not used for &DAMON_ARBITRARY_TARGET case. | |
2224d848 SP |
278 | * @target_valid should check whether the target is still valid for the |
279 | * monitoring. | |
280 | * @cleanup is called from @kdamond just before its termination. | |
281 | */ | |
282 | struct damon_primitive { | |
283 | void (*init)(struct damon_ctx *context); | |
284 | void (*update)(struct damon_ctx *context); | |
285 | void (*prepare_access_checks)(struct damon_ctx *context); | |
b9a6ac4e | 286 | unsigned int (*check_accesses)(struct damon_ctx *context); |
2224d848 | 287 | void (*reset_aggregated)(struct damon_ctx *context); |
38683e00 SP |
288 | int (*get_scheme_score)(struct damon_ctx *context, |
289 | struct damon_target *t, struct damon_region *r, | |
290 | struct damos *scheme); | |
1f366e42 SP |
291 | int (*apply_scheme)(struct damon_ctx *context, struct damon_target *t, |
292 | struct damon_region *r, struct damos *scheme); | |
2224d848 SP |
293 | bool (*target_valid)(void *target); |
294 | void (*cleanup)(struct damon_ctx *context); | |
295 | }; | |
296 | ||
d2f272b3 SP |
297 | /** |
298 | * struct damon_callback - Monitoring events notification callbacks. | |
2224d848 SP |
299 | * |
300 | * @before_start: Called before starting the monitoring. | |
301 | * @after_sampling: Called after each sampling. | |
302 | * @after_aggregation: Called after each aggregation. | |
303 | * @before_terminate: Called before terminating the monitoring. | |
304 | * @private: User private data. | |
305 | * | |
306 | * The monitoring thread (&damon_ctx.kdamond) calls @before_start and | |
307 | * @before_terminate just before starting and finishing the monitoring, | |
308 | * respectively. Therefore, those are good places for installing and cleaning | |
309 | * @private. | |
310 | * | |
311 | * The monitoring thread calls @after_sampling and @after_aggregation for each | |
312 | * of the sampling intervals and aggregation intervals, respectively. | |
313 | * Therefore, users can safely access the monitoring results without additional | |
314 | * protection. For the reason, users are recommended to use these callback for | |
315 | * the accesses to the results. | |
316 | * | |
317 | * If any callback returns non-zero, monitoring stops. | |
318 | */ | |
319 | struct damon_callback { | |
320 | void *private; | |
321 | ||
322 | int (*before_start)(struct damon_ctx *context); | |
323 | int (*after_sampling)(struct damon_ctx *context); | |
324 | int (*after_aggregation)(struct damon_ctx *context); | |
325 | int (*before_terminate)(struct damon_ctx *context); | |
326 | }; | |
327 | ||
328 | /** | |
329 | * struct damon_ctx - Represents a context for each monitoring. This is the | |
330 | * main interface that allows users to set the attributes and get the results | |
331 | * of the monitoring. | |
332 | * | |
333 | * @sample_interval: The time between access samplings. | |
334 | * @aggr_interval: The time between monitor results aggregations. | |
335 | * @primitive_update_interval: The time between monitoring primitive updates. | |
336 | * | |
337 | * For each @sample_interval, DAMON checks whether each region is accessed or | |
338 | * not. It aggregates and keeps the access information (number of accesses to | |
339 | * each region) for @aggr_interval time. DAMON also checks whether the target | |
340 | * memory regions need update (e.g., by ``mmap()`` calls from the application, | |
341 | * in case of virtual memory monitoring) and applies the changes for each | |
342 | * @primitive_update_interval. All time intervals are in micro-seconds. | |
343 | * Please refer to &struct damon_primitive and &struct damon_callback for more | |
344 | * detail. | |
345 | * | |
346 | * @kdamond: Kernel thread who does the monitoring. | |
347 | * @kdamond_stop: Notifies whether kdamond should stop. | |
348 | * @kdamond_lock: Mutex for the synchronizations with @kdamond. | |
349 | * | |
350 | * For each monitoring context, one kernel thread for the monitoring is | |
351 | * created. The pointer to the thread is stored in @kdamond. | |
352 | * | |
353 | * Once started, the monitoring thread runs until explicitly required to be | |
354 | * terminated or every monitoring target is invalid. The validity of the | |
355 | * targets is checked via the &damon_primitive.target_valid of @primitive. The | |
356 | * termination can also be explicitly requested by writing non-zero to | |
357 | * @kdamond_stop. The thread sets @kdamond to NULL when it terminates. | |
358 | * Therefore, users can know whether the monitoring is ongoing or terminated by | |
359 | * reading @kdamond. Reads and writes to @kdamond and @kdamond_stop from | |
360 | * outside of the monitoring thread must be protected by @kdamond_lock. | |
361 | * | |
362 | * Note that the monitoring thread protects only @kdamond and @kdamond_stop via | |
363 | * @kdamond_lock. Accesses to other fields must be protected by themselves. | |
364 | * | |
365 | * @primitive: Set of monitoring primitives for given use cases. | |
366 | * @callback: Set of callbacks for monitoring events notifications. | |
367 | * | |
b9a6ac4e SP |
368 | * @min_nr_regions: The minimum number of adaptive monitoring regions. |
369 | * @max_nr_regions: The maximum number of adaptive monitoring regions. | |
370 | * @adaptive_targets: Head of monitoring targets (&damon_target) list. | |
1f366e42 | 371 | * @schemes: Head of schemes (&damos) list. |
2224d848 SP |
372 | */ |
373 | struct damon_ctx { | |
374 | unsigned long sample_interval; | |
375 | unsigned long aggr_interval; | |
376 | unsigned long primitive_update_interval; | |
377 | ||
378 | /* private: internal use only */ | |
379 | struct timespec64 last_aggregation; | |
380 | struct timespec64 last_primitive_update; | |
381 | ||
382 | /* public: */ | |
383 | struct task_struct *kdamond; | |
2224d848 SP |
384 | struct mutex kdamond_lock; |
385 | ||
386 | struct damon_primitive primitive; | |
387 | struct damon_callback callback; | |
388 | ||
b9a6ac4e SP |
389 | unsigned long min_nr_regions; |
390 | unsigned long max_nr_regions; | |
391 | struct list_head adaptive_targets; | |
1f366e42 | 392 | struct list_head schemes; |
2224d848 SP |
393 | }; |
394 | ||
f23b8eee SP |
395 | #define damon_next_region(r) \ |
396 | (container_of(r->list.next, struct damon_region, list)) | |
397 | ||
398 | #define damon_prev_region(r) \ | |
399 | (container_of(r->list.prev, struct damon_region, list)) | |
400 | ||
50585192 SP |
401 | #define damon_last_region(t) \ |
402 | (list_last_entry(&t->regions_list, struct damon_region, list)) | |
403 | ||
f23b8eee SP |
404 | #define damon_for_each_region(r, t) \ |
405 | list_for_each_entry(r, &t->regions_list, list) | |
406 | ||
407 | #define damon_for_each_region_safe(r, next, t) \ | |
408 | list_for_each_entry_safe(r, next, &t->regions_list, list) | |
409 | ||
410 | #define damon_for_each_target(t, ctx) \ | |
b9a6ac4e | 411 | list_for_each_entry(t, &(ctx)->adaptive_targets, list) |
f23b8eee SP |
412 | |
413 | #define damon_for_each_target_safe(t, next, ctx) \ | |
b9a6ac4e | 414 | list_for_each_entry_safe(t, next, &(ctx)->adaptive_targets, list) |
f23b8eee | 415 | |
1f366e42 SP |
416 | #define damon_for_each_scheme(s, ctx) \ |
417 | list_for_each_entry(s, &(ctx)->schemes, list) | |
418 | ||
419 | #define damon_for_each_scheme_safe(s, next, ctx) \ | |
420 | list_for_each_entry_safe(s, next, &(ctx)->schemes, list) | |
421 | ||
2224d848 SP |
422 | #ifdef CONFIG_DAMON |
423 | ||
f23b8eee SP |
424 | struct damon_region *damon_new_region(unsigned long start, unsigned long end); |
425 | inline void damon_insert_region(struct damon_region *r, | |
b9a6ac4e SP |
426 | struct damon_region *prev, struct damon_region *next, |
427 | struct damon_target *t); | |
f23b8eee | 428 | void damon_add_region(struct damon_region *r, struct damon_target *t); |
b9a6ac4e | 429 | void damon_destroy_region(struct damon_region *r, struct damon_target *t); |
f23b8eee | 430 | |
1f366e42 SP |
431 | struct damos *damon_new_scheme( |
432 | unsigned long min_sz_region, unsigned long max_sz_region, | |
433 | unsigned int min_nr_accesses, unsigned int max_nr_accesses, | |
434 | unsigned int min_age_region, unsigned int max_age_region, | |
ee801b7d SP |
435 | enum damos_action action, struct damos_quota *quota, |
436 | struct damos_watermarks *wmarks); | |
1f366e42 SP |
437 | void damon_add_scheme(struct damon_ctx *ctx, struct damos *s); |
438 | void damon_destroy_scheme(struct damos *s); | |
439 | ||
f23b8eee SP |
440 | struct damon_target *damon_new_target(unsigned long id); |
441 | void damon_add_target(struct damon_ctx *ctx, struct damon_target *t); | |
b5ca3e83 | 442 | bool damon_targets_empty(struct damon_ctx *ctx); |
f23b8eee SP |
443 | void damon_free_target(struct damon_target *t); |
444 | void damon_destroy_target(struct damon_target *t); | |
b9a6ac4e | 445 | unsigned int damon_nr_regions(struct damon_target *t); |
f23b8eee | 446 | |
2224d848 SP |
447 | struct damon_ctx *damon_new_ctx(void); |
448 | void damon_destroy_ctx(struct damon_ctx *ctx); | |
4bc05954 SP |
449 | int damon_set_targets(struct damon_ctx *ctx, |
450 | unsigned long *ids, ssize_t nr_ids); | |
2224d848 | 451 | int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int, |
b9a6ac4e SP |
452 | unsigned long aggr_int, unsigned long primitive_upd_int, |
453 | unsigned long min_nr_reg, unsigned long max_nr_reg); | |
1f366e42 SP |
454 | int damon_set_schemes(struct damon_ctx *ctx, |
455 | struct damos **schemes, ssize_t nr_schemes); | |
4bc05954 | 456 | int damon_nr_running_ctxs(void); |
2224d848 SP |
457 | |
458 | int damon_start(struct damon_ctx **ctxs, int nr_ctxs); | |
459 | int damon_stop(struct damon_ctx **ctxs, int nr_ctxs); | |
460 | ||
461 | #endif /* CONFIG_DAMON */ | |
462 | ||
3f49584b SP |
463 | #ifdef CONFIG_DAMON_VADDR |
464 | ||
465 | /* Monitoring primitives for virtual memory address spaces */ | |
466 | void damon_va_init(struct damon_ctx *ctx); | |
467 | void damon_va_update(struct damon_ctx *ctx); | |
468 | void damon_va_prepare_access_checks(struct damon_ctx *ctx); | |
469 | unsigned int damon_va_check_accesses(struct damon_ctx *ctx); | |
470 | bool damon_va_target_valid(void *t); | |
471 | void damon_va_cleanup(struct damon_ctx *ctx); | |
6dea8add SP |
472 | int damon_va_apply_scheme(struct damon_ctx *context, struct damon_target *t, |
473 | struct damon_region *r, struct damos *scheme); | |
198f0f4c SP |
474 | int damon_va_scheme_score(struct damon_ctx *context, struct damon_target *t, |
475 | struct damon_region *r, struct damos *scheme); | |
3f49584b SP |
476 | void damon_va_set_primitives(struct damon_ctx *ctx); |
477 | ||
478 | #endif /* CONFIG_DAMON_VADDR */ | |
479 | ||
a28397be SP |
480 | #ifdef CONFIG_DAMON_PADDR |
481 | ||
482 | /* Monitoring primitives for the physical memory address space */ | |
483 | void damon_pa_prepare_access_checks(struct damon_ctx *ctx); | |
484 | unsigned int damon_pa_check_accesses(struct damon_ctx *ctx); | |
485 | bool damon_pa_target_valid(void *t); | |
57223ac2 SP |
486 | int damon_pa_apply_scheme(struct damon_ctx *context, struct damon_target *t, |
487 | struct damon_region *r, struct damos *scheme); | |
198f0f4c SP |
488 | int damon_pa_scheme_score(struct damon_ctx *context, struct damon_target *t, |
489 | struct damon_region *r, struct damos *scheme); | |
a28397be SP |
490 | void damon_pa_set_primitives(struct damon_ctx *ctx); |
491 | ||
492 | #endif /* CONFIG_DAMON_PADDR */ | |
493 | ||
2224d848 | 494 | #endif /* _DAMON_H */ |