2 * Dirtyrate implement code
4 * Copyright (c) 2020 HUAWEI TECHNOLOGIES CO.,LTD.
7 * Chuan Zheng <zhengchuan@huawei.com>
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
13 #include "qemu/osdep.h"
14 #include "qemu/error-report.h"
16 #include "hw/core/cpu.h"
17 #include "qapi/error.h"
18 #include "exec/ramblock.h"
19 #include "exec/target_page.h"
20 #include "qemu/rcu_queue.h"
21 #include "qemu/main-loop.h"
22 #include "qapi/qapi-commands-migration.h"
25 #include "dirtyrate.h"
26 #include "monitor/hmp.h"
27 #include "monitor/monitor.h"
28 #include "qapi/qmp/qdict.h"
29 #include "sysemu/kvm.h"
30 #include "sysemu/runstate.h"
31 #include "exec/memory.h"
32 #include "qemu/xxhash.h"
35 * total_dirty_pages is procted by BQL and is used
36 * to stat dirty pages during the period of two
37 * memory_global_dirty_log_sync
39 uint64_t total_dirty_pages
;
41 typedef struct DirtyPageRecord
{
46 static int CalculatingState
= DIRTY_RATE_STATUS_UNSTARTED
;
47 static struct DirtyRateStat DirtyStat
;
48 static DirtyRateMeasureMode dirtyrate_mode
=
49 DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
;
51 static int64_t dirty_stat_wait(int64_t msec
, int64_t initial_time
)
55 current_time
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
);
56 if ((current_time
- initial_time
) >= msec
) {
57 msec
= current_time
- initial_time
;
59 g_usleep((msec
+ initial_time
- current_time
) * 1000);
65 static inline void record_dirtypages(DirtyPageRecord
*dirty_pages
,
66 CPUState
*cpu
, bool start
)
69 dirty_pages
[cpu
->cpu_index
].start_pages
= cpu
->dirty_pages
;
71 dirty_pages
[cpu
->cpu_index
].end_pages
= cpu
->dirty_pages
;
75 static int64_t do_calculate_dirtyrate(DirtyPageRecord dirty_pages
,
78 uint64_t increased_dirty_pages
=
79 dirty_pages
.end_pages
- dirty_pages
.start_pages
;
80 uint64_t memory_size_MiB
= qemu_target_pages_to_MiB(increased_dirty_pages
);
82 return memory_size_MiB
* 1000 / calc_time_ms
;
85 void global_dirty_log_change(unsigned int flag
, bool start
)
87 qemu_mutex_lock_iothread();
89 memory_global_dirty_log_start(flag
);
91 memory_global_dirty_log_stop(flag
);
93 qemu_mutex_unlock_iothread();
97 * global_dirty_log_sync
98 * 1. sync dirty log from kvm
99 * 2. stop dirty tracking if needed.
101 static void global_dirty_log_sync(unsigned int flag
, bool one_shot
)
103 qemu_mutex_lock_iothread();
104 memory_global_dirty_log_sync(false);
106 memory_global_dirty_log_stop(flag
);
108 qemu_mutex_unlock_iothread();
111 static DirtyPageRecord
*vcpu_dirty_stat_alloc(VcpuStat
*stat
)
121 stat
->rates
= g_new0(DirtyRateVcpu
, nvcpu
);
123 return g_new0(DirtyPageRecord
, nvcpu
);
126 static void vcpu_dirty_stat_collect(VcpuStat
*stat
,
127 DirtyPageRecord
*records
,
133 record_dirtypages(records
, cpu
, start
);
137 int64_t vcpu_calculate_dirtyrate(int64_t calc_time_ms
,
142 DirtyPageRecord
*records
;
143 int64_t init_time_ms
;
150 init_time_ms
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
);
152 WITH_QEMU_LOCK_GUARD(&qemu_cpu_list_lock
) {
153 gen_id
= cpu_list_generation_id_get();
154 records
= vcpu_dirty_stat_alloc(stat
);
155 vcpu_dirty_stat_collect(stat
, records
, true);
158 duration
= dirty_stat_wait(calc_time_ms
, init_time_ms
);
160 global_dirty_log_sync(flag
, one_shot
);
162 WITH_QEMU_LOCK_GUARD(&qemu_cpu_list_lock
) {
163 if (gen_id
!= cpu_list_generation_id_get()) {
169 vcpu_dirty_stat_collect(stat
, records
, false);
172 for (i
= 0; i
< stat
->nvcpu
; i
++) {
173 dirtyrate
= do_calculate_dirtyrate(records
[i
], duration
);
175 stat
->rates
[i
].id
= i
;
176 stat
->rates
[i
].dirty_rate
= dirtyrate
;
178 trace_dirtyrate_do_calculate_vcpu(i
, dirtyrate
);
186 static bool is_sample_period_valid(int64_t sec
)
188 if (sec
< MIN_FETCH_DIRTYRATE_TIME_SEC
||
189 sec
> MAX_FETCH_DIRTYRATE_TIME_SEC
) {
196 static bool is_sample_pages_valid(int64_t pages
)
198 return pages
>= MIN_SAMPLE_PAGE_COUNT
&&
199 pages
<= MAX_SAMPLE_PAGE_COUNT
;
202 static int dirtyrate_set_state(int *state
, int old_state
, int new_state
)
204 assert(new_state
< DIRTY_RATE_STATUS__MAX
);
205 trace_dirtyrate_set_state(DirtyRateStatus_str(new_state
));
206 if (qatomic_cmpxchg(state
, old_state
, new_state
) == old_state
) {
213 static struct DirtyRateInfo
*query_dirty_rate_info(void)
216 int64_t dirty_rate
= DirtyStat
.dirty_rate
;
217 struct DirtyRateInfo
*info
= g_new0(DirtyRateInfo
, 1);
218 DirtyRateVcpuList
*head
= NULL
, **tail
= &head
;
220 info
->status
= CalculatingState
;
221 info
->start_time
= DirtyStat
.start_time
;
222 info
->calc_time
= DirtyStat
.calc_time
;
223 info
->sample_pages
= DirtyStat
.sample_pages
;
224 info
->mode
= dirtyrate_mode
;
226 if (qatomic_read(&CalculatingState
) == DIRTY_RATE_STATUS_MEASURED
) {
227 info
->has_dirty_rate
= true;
228 info
->dirty_rate
= dirty_rate
;
230 if (dirtyrate_mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_RING
) {
232 * set sample_pages with 0 to indicate page sampling
235 info
->sample_pages
= 0;
236 info
->has_vcpu_dirty_rate
= true;
237 for (i
= 0; i
< DirtyStat
.dirty_ring
.nvcpu
; i
++) {
238 DirtyRateVcpu
*rate
= g_new0(DirtyRateVcpu
, 1);
239 rate
->id
= DirtyStat
.dirty_ring
.rates
[i
].id
;
240 rate
->dirty_rate
= DirtyStat
.dirty_ring
.rates
[i
].dirty_rate
;
241 QAPI_LIST_APPEND(tail
, rate
);
243 info
->vcpu_dirty_rate
= head
;
246 if (dirtyrate_mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP
) {
247 info
->sample_pages
= 0;
251 trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState
));
256 static void init_dirtyrate_stat(int64_t start_time
,
257 struct DirtyRateConfig config
)
259 DirtyStat
.dirty_rate
= -1;
260 DirtyStat
.start_time
= start_time
;
261 DirtyStat
.calc_time
= config
.sample_period_seconds
;
262 DirtyStat
.sample_pages
= config
.sample_pages_per_gigabytes
;
264 switch (config
.mode
) {
265 case DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
:
266 DirtyStat
.page_sampling
.total_dirty_samples
= 0;
267 DirtyStat
.page_sampling
.total_sample_count
= 0;
268 DirtyStat
.page_sampling
.total_block_mem_MB
= 0;
270 case DIRTY_RATE_MEASURE_MODE_DIRTY_RING
:
271 DirtyStat
.dirty_ring
.nvcpu
= -1;
272 DirtyStat
.dirty_ring
.rates
= NULL
;
279 static void cleanup_dirtyrate_stat(struct DirtyRateConfig config
)
281 /* last calc-dirty-rate qmp use dirty ring mode */
282 if (dirtyrate_mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_RING
) {
283 free(DirtyStat
.dirty_ring
.rates
);
284 DirtyStat
.dirty_ring
.rates
= NULL
;
288 static void update_dirtyrate_stat(struct RamblockDirtyInfo
*info
)
290 DirtyStat
.page_sampling
.total_dirty_samples
+= info
->sample_dirty_count
;
291 DirtyStat
.page_sampling
.total_sample_count
+= info
->sample_pages_count
;
292 /* size of total pages in MB */
293 DirtyStat
.page_sampling
.total_block_mem_MB
+=
294 qemu_target_pages_to_MiB(info
->ramblock_pages
);
297 static void update_dirtyrate(uint64_t msec
)
300 uint64_t total_dirty_samples
= DirtyStat
.page_sampling
.total_dirty_samples
;
301 uint64_t total_sample_count
= DirtyStat
.page_sampling
.total_sample_count
;
302 uint64_t total_block_mem_MB
= DirtyStat
.page_sampling
.total_block_mem_MB
;
304 dirtyrate
= total_dirty_samples
* total_block_mem_MB
*
305 1000 / (total_sample_count
* msec
);
307 DirtyStat
.dirty_rate
= dirtyrate
;
311 * Compute hash of a single page of size TARGET_PAGE_SIZE.
313 static uint32_t compute_page_hash(void *ptr
)
315 size_t page_size
= qemu_target_page_size();
317 uint64_t v1
, v2
, v3
, v4
;
319 const uint64_t *p
= ptr
;
321 v1
= QEMU_XXHASH_SEED
+ XXH_PRIME64_1
+ XXH_PRIME64_2
;
322 v2
= QEMU_XXHASH_SEED
+ XXH_PRIME64_2
;
323 v3
= QEMU_XXHASH_SEED
+ 0;
324 v4
= QEMU_XXHASH_SEED
- XXH_PRIME64_1
;
325 for (i
= 0; i
< page_size
/ 8; i
+= 4) {
326 v1
= XXH64_round(v1
, p
[i
+ 0]);
327 v2
= XXH64_round(v2
, p
[i
+ 1]);
328 v3
= XXH64_round(v3
, p
[i
+ 2]);
329 v4
= XXH64_round(v4
, p
[i
+ 3]);
331 res
= XXH64_mergerounds(v1
, v2
, v3
, v4
);
333 res
= XXH64_avalanche(res
);
334 return (uint32_t)(res
& UINT32_MAX
);
339 * get hash result for the sampled memory with length of TARGET_PAGE_SIZE
340 * in ramblock, which starts from ramblock base address.
342 static uint32_t get_ramblock_vfn_hash(struct RamblockDirtyInfo
*info
,
347 hash
= compute_page_hash(info
->ramblock_addr
+
348 vfn
* qemu_target_page_size());
350 trace_get_ramblock_vfn_hash(info
->idstr
, vfn
, hash
);
354 static bool save_ramblock_hash(struct RamblockDirtyInfo
*info
)
356 unsigned int sample_pages_count
;
360 sample_pages_count
= info
->sample_pages_count
;
362 /* ramblock size less than one page, return success to skip this ramblock */
363 if (unlikely(info
->ramblock_pages
== 0 || sample_pages_count
== 0)) {
367 info
->hash_result
= g_try_malloc0_n(sample_pages_count
,
369 if (!info
->hash_result
) {
373 info
->sample_page_vfn
= g_try_malloc0_n(sample_pages_count
,
375 if (!info
->sample_page_vfn
) {
376 g_free(info
->hash_result
);
381 for (i
= 0; i
< sample_pages_count
; i
++) {
382 info
->sample_page_vfn
[i
] = g_rand_int_range(rand
, 0,
383 info
->ramblock_pages
- 1);
384 info
->hash_result
[i
] = get_ramblock_vfn_hash(info
,
385 info
->sample_page_vfn
[i
]);
392 static void get_ramblock_dirty_info(RAMBlock
*block
,
393 struct RamblockDirtyInfo
*info
,
394 struct DirtyRateConfig
*config
)
396 uint64_t sample_pages_per_gigabytes
= config
->sample_pages_per_gigabytes
;
398 /* Right shift 30 bits to calc ramblock size in GB */
399 info
->sample_pages_count
= (qemu_ram_get_used_length(block
) *
400 sample_pages_per_gigabytes
) >> 30;
401 /* Right shift TARGET_PAGE_BITS to calc page count */
402 info
->ramblock_pages
= qemu_ram_get_used_length(block
) >>
403 qemu_target_page_bits();
404 info
->ramblock_addr
= qemu_ram_get_host_addr(block
);
405 strcpy(info
->idstr
, qemu_ram_get_idstr(block
));
408 static void free_ramblock_dirty_info(struct RamblockDirtyInfo
*infos
, int count
)
416 for (i
= 0; i
< count
; i
++) {
417 g_free(infos
[i
].sample_page_vfn
);
418 g_free(infos
[i
].hash_result
);
423 static bool skip_sample_ramblock(RAMBlock
*block
)
426 * Sample only blocks larger than MIN_RAMBLOCK_SIZE.
428 if (qemu_ram_get_used_length(block
) < (MIN_RAMBLOCK_SIZE
<< 10)) {
429 trace_skip_sample_ramblock(block
->idstr
,
430 qemu_ram_get_used_length(block
));
437 static bool record_ramblock_hash_info(struct RamblockDirtyInfo
**block_dinfo
,
438 struct DirtyRateConfig config
,
441 struct RamblockDirtyInfo
*info
= NULL
;
442 struct RamblockDirtyInfo
*dinfo
= NULL
;
443 RAMBlock
*block
= NULL
;
448 RAMBLOCK_FOREACH_MIGRATABLE(block
) {
449 if (skip_sample_ramblock(block
)) {
455 dinfo
= g_try_malloc0_n(total_count
, sizeof(struct RamblockDirtyInfo
));
460 RAMBLOCK_FOREACH_MIGRATABLE(block
) {
461 if (skip_sample_ramblock(block
)) {
464 if (index
>= total_count
) {
467 info
= &dinfo
[index
];
468 get_ramblock_dirty_info(block
, info
, &config
);
469 if (!save_ramblock_hash(info
)) {
477 *block_count
= index
;
478 *block_dinfo
= dinfo
;
482 static void calc_page_dirty_rate(struct RamblockDirtyInfo
*info
)
487 for (i
= 0; i
< info
->sample_pages_count
; i
++) {
488 hash
= get_ramblock_vfn_hash(info
, info
->sample_page_vfn
[i
]);
489 if (hash
!= info
->hash_result
[i
]) {
490 trace_calc_page_dirty_rate(info
->idstr
, hash
, info
->hash_result
[i
]);
491 info
->sample_dirty_count
++;
496 static struct RamblockDirtyInfo
*
497 find_block_matched(RAMBlock
*block
, int count
,
498 struct RamblockDirtyInfo
*infos
)
502 for (i
= 0; i
< count
; i
++) {
503 if (!strcmp(infos
[i
].idstr
, qemu_ram_get_idstr(block
))) {
512 if (infos
[i
].ramblock_addr
!= qemu_ram_get_host_addr(block
) ||
513 infos
[i
].ramblock_pages
!=
514 (qemu_ram_get_used_length(block
) >> qemu_target_page_bits())) {
515 trace_find_page_matched(block
->idstr
);
522 static bool compare_page_hash_info(struct RamblockDirtyInfo
*info
,
525 struct RamblockDirtyInfo
*block_dinfo
= NULL
;
526 RAMBlock
*block
= NULL
;
528 RAMBLOCK_FOREACH_MIGRATABLE(block
) {
529 if (skip_sample_ramblock(block
)) {
532 block_dinfo
= find_block_matched(block
, block_count
, info
);
533 if (block_dinfo
== NULL
) {
536 calc_page_dirty_rate(block_dinfo
);
537 update_dirtyrate_stat(block_dinfo
);
540 if (DirtyStat
.page_sampling
.total_sample_count
== 0) {
547 static inline void record_dirtypages_bitmap(DirtyPageRecord
*dirty_pages
,
551 dirty_pages
->start_pages
= total_dirty_pages
;
553 dirty_pages
->end_pages
= total_dirty_pages
;
557 static inline void dirtyrate_manual_reset_protect(void)
559 RAMBlock
*block
= NULL
;
561 WITH_RCU_READ_LOCK_GUARD() {
562 RAMBLOCK_FOREACH_MIGRATABLE(block
) {
563 memory_region_clear_dirty_bitmap(block
->mr
, 0,
569 static void calculate_dirtyrate_dirty_bitmap(struct DirtyRateConfig config
)
573 DirtyPageRecord dirty_pages
;
575 qemu_mutex_lock_iothread();
576 memory_global_dirty_log_start(GLOBAL_DIRTY_DIRTY_RATE
);
579 * 1'round of log sync may return all 1 bits with
580 * KVM_DIRTY_LOG_INITIALLY_SET enable
581 * skip it unconditionally and start dirty tracking
582 * from 2'round of log sync
584 memory_global_dirty_log_sync(false);
587 * reset page protect manually and unconditionally.
588 * this make sure kvm dirty log be cleared if
589 * KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE cap is enabled.
591 dirtyrate_manual_reset_protect();
592 qemu_mutex_unlock_iothread();
594 record_dirtypages_bitmap(&dirty_pages
, true);
596 start_time
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
);
597 DirtyStat
.start_time
= start_time
/ 1000;
599 msec
= config
.sample_period_seconds
* 1000;
600 msec
= dirty_stat_wait(msec
, start_time
);
601 DirtyStat
.calc_time
= msec
/ 1000;
605 * 1. fetch dirty bitmap from kvm
606 * 2. stop dirty tracking
608 global_dirty_log_sync(GLOBAL_DIRTY_DIRTY_RATE
, true);
610 record_dirtypages_bitmap(&dirty_pages
, false);
612 DirtyStat
.dirty_rate
= do_calculate_dirtyrate(dirty_pages
, msec
);
615 static void calculate_dirtyrate_dirty_ring(struct DirtyRateConfig config
)
618 uint64_t dirtyrate
= 0;
619 uint64_t dirtyrate_sum
= 0;
623 global_dirty_log_change(GLOBAL_DIRTY_DIRTY_RATE
, true);
625 DirtyStat
.start_time
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) / 1000;
627 /* calculate vcpu dirtyrate */
628 duration
= vcpu_calculate_dirtyrate(config
.sample_period_seconds
* 1000,
629 &DirtyStat
.dirty_ring
,
630 GLOBAL_DIRTY_DIRTY_RATE
,
633 DirtyStat
.calc_time
= duration
/ 1000;
635 /* calculate vm dirtyrate */
636 for (i
= 0; i
< DirtyStat
.dirty_ring
.nvcpu
; i
++) {
637 dirtyrate
= DirtyStat
.dirty_ring
.rates
[i
].dirty_rate
;
638 DirtyStat
.dirty_ring
.rates
[i
].dirty_rate
= dirtyrate
;
639 dirtyrate_sum
+= dirtyrate
;
642 DirtyStat
.dirty_rate
= dirtyrate_sum
;
645 static void calculate_dirtyrate_sample_vm(struct DirtyRateConfig config
)
647 struct RamblockDirtyInfo
*block_dinfo
= NULL
;
650 int64_t initial_time
;
653 initial_time
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
);
654 if (!record_ramblock_hash_info(&block_dinfo
, config
, &block_count
)) {
659 msec
= config
.sample_period_seconds
* 1000;
660 msec
= dirty_stat_wait(msec
, initial_time
);
661 DirtyStat
.start_time
= initial_time
/ 1000;
662 DirtyStat
.calc_time
= msec
/ 1000;
665 if (!compare_page_hash_info(block_dinfo
, block_count
)) {
669 update_dirtyrate(msec
);
673 free_ramblock_dirty_info(block_dinfo
, block_count
);
676 static void calculate_dirtyrate(struct DirtyRateConfig config
)
678 if (config
.mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP
) {
679 calculate_dirtyrate_dirty_bitmap(config
);
680 } else if (config
.mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_RING
) {
681 calculate_dirtyrate_dirty_ring(config
);
683 calculate_dirtyrate_sample_vm(config
);
686 trace_dirtyrate_calculate(DirtyStat
.dirty_rate
);
689 void *get_dirtyrate_thread(void *arg
)
691 struct DirtyRateConfig config
= *(struct DirtyRateConfig
*)arg
;
693 rcu_register_thread();
695 ret
= dirtyrate_set_state(&CalculatingState
, DIRTY_RATE_STATUS_UNSTARTED
,
696 DIRTY_RATE_STATUS_MEASURING
);
698 error_report("change dirtyrate state failed.");
702 calculate_dirtyrate(config
);
704 ret
= dirtyrate_set_state(&CalculatingState
, DIRTY_RATE_STATUS_MEASURING
,
705 DIRTY_RATE_STATUS_MEASURED
);
707 error_report("change dirtyrate state failed.");
710 rcu_unregister_thread();
714 void qmp_calc_dirty_rate(int64_t calc_time
,
715 bool has_sample_pages
,
716 int64_t sample_pages
,
718 DirtyRateMeasureMode mode
,
721 static struct DirtyRateConfig config
;
727 * If the dirty rate is already being measured, don't attempt to start.
729 if (qatomic_read(&CalculatingState
) == DIRTY_RATE_STATUS_MEASURING
) {
730 error_setg(errp
, "the dirty rate is already being measured.");
734 if (!is_sample_period_valid(calc_time
)) {
735 error_setg(errp
, "calc-time is out of range[%d, %d].",
736 MIN_FETCH_DIRTYRATE_TIME_SEC
,
737 MAX_FETCH_DIRTYRATE_TIME_SEC
);
742 mode
= DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
;
745 if (has_sample_pages
&& mode
!= DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
) {
746 error_setg(errp
, "sample-pages is used only in page-sampling mode");
750 if (has_sample_pages
) {
751 if (!is_sample_pages_valid(sample_pages
)) {
752 error_setg(errp
, "sample-pages is out of range[%d, %d].",
753 MIN_SAMPLE_PAGE_COUNT
,
754 MAX_SAMPLE_PAGE_COUNT
);
758 sample_pages
= DIRTYRATE_DEFAULT_SAMPLE_PAGES
;
762 * dirty ring mode only works when kvm dirty ring is enabled.
763 * on the contrary, dirty bitmap mode is not.
765 if (((mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_RING
) &&
766 !kvm_dirty_ring_enabled()) ||
767 ((mode
== DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP
) &&
768 kvm_dirty_ring_enabled())) {
769 error_setg(errp
, "mode %s is not enabled, use other method instead.",
770 DirtyRateMeasureMode_str(mode
));
775 * Init calculation state as unstarted.
777 ret
= dirtyrate_set_state(&CalculatingState
, CalculatingState
,
778 DIRTY_RATE_STATUS_UNSTARTED
);
780 error_setg(errp
, "init dirty rate calculation state failed.");
784 config
.sample_period_seconds
= calc_time
;
785 config
.sample_pages_per_gigabytes
= sample_pages
;
788 cleanup_dirtyrate_stat(config
);
791 * update dirty rate mode so that we can figure out what mode has
792 * been used in last calculation
794 dirtyrate_mode
= mode
;
796 start_time
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) / 1000;
797 init_dirtyrate_stat(start_time
, config
);
799 qemu_thread_create(&thread
, "get_dirtyrate", get_dirtyrate_thread
,
800 (void *)&config
, QEMU_THREAD_DETACHED
);
803 struct DirtyRateInfo
*qmp_query_dirty_rate(Error
**errp
)
805 return query_dirty_rate_info();
808 void hmp_info_dirty_rate(Monitor
*mon
, const QDict
*qdict
)
810 DirtyRateInfo
*info
= query_dirty_rate_info();
812 monitor_printf(mon
, "Status: %s\n",
813 DirtyRateStatus_str(info
->status
));
814 monitor_printf(mon
, "Start Time: %"PRIi64
" (ms)\n",
816 if (info
->mode
== DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
) {
817 monitor_printf(mon
, "Sample Pages: %"PRIu64
" (per GB)\n",
820 monitor_printf(mon
, "Period: %"PRIi64
" (sec)\n",
822 monitor_printf(mon
, "Mode: %s\n",
823 DirtyRateMeasureMode_str(info
->mode
));
824 monitor_printf(mon
, "Dirty rate: ");
825 if (info
->has_dirty_rate
) {
826 monitor_printf(mon
, "%"PRIi64
" (MB/s)\n", info
->dirty_rate
);
827 if (info
->has_vcpu_dirty_rate
) {
828 DirtyRateVcpuList
*rate
, *head
= info
->vcpu_dirty_rate
;
829 for (rate
= head
; rate
!= NULL
; rate
= rate
->next
) {
830 monitor_printf(mon
, "vcpu[%"PRIi64
"], Dirty rate: %"PRIi64
831 " (MB/s)\n", rate
->value
->id
,
832 rate
->value
->dirty_rate
);
836 monitor_printf(mon
, "(not ready)\n");
839 qapi_free_DirtyRateVcpuList(info
->vcpu_dirty_rate
);
843 void hmp_calc_dirty_rate(Monitor
*mon
, const QDict
*qdict
)
845 int64_t sec
= qdict_get_try_int(qdict
, "second", 0);
846 int64_t sample_pages
= qdict_get_try_int(qdict
, "sample_pages_per_GB", -1);
847 bool has_sample_pages
= (sample_pages
!= -1);
848 bool dirty_ring
= qdict_get_try_bool(qdict
, "dirty_ring", false);
849 bool dirty_bitmap
= qdict_get_try_bool(qdict
, "dirty_bitmap", false);
850 DirtyRateMeasureMode mode
= DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING
;
854 monitor_printf(mon
, "Incorrect period length specified!\n");
858 if (dirty_ring
&& dirty_bitmap
) {
859 monitor_printf(mon
, "Either dirty ring or dirty bitmap "
860 "can be specified!\n");
865 mode
= DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP
;
866 } else if (dirty_ring
) {
867 mode
= DIRTY_RATE_MEASURE_MODE_DIRTY_RING
;
870 qmp_calc_dirty_rate(sec
, has_sample_pages
, sample_pages
, true,
873 hmp_handle_error(mon
, err
);
877 monitor_printf(mon
, "Starting dirty rate measurement with period %"PRIi64
879 monitor_printf(mon
, "[Please use 'info dirty_rate' to check results]\n");