14240dceeSChuan Zheng /* 24240dceeSChuan Zheng * Dirtyrate implement code 34240dceeSChuan Zheng * 44240dceeSChuan Zheng * Copyright (c) 2020 HUAWEI TECHNOLOGIES CO.,LTD. 54240dceeSChuan Zheng * 64240dceeSChuan Zheng * Authors: 74240dceeSChuan Zheng * Chuan Zheng <zhengchuan@huawei.com> 84240dceeSChuan Zheng * 94240dceeSChuan Zheng * This work is licensed under the terms of the GNU GPL, version 2 or later. 104240dceeSChuan Zheng * See the COPYING file in the top-level directory. 114240dceeSChuan Zheng */ 124240dceeSChuan Zheng 134240dceeSChuan Zheng #include "qemu/osdep.h" 14662770afSMarc-André Lureau #include <zlib.h> 154240dceeSChuan Zheng #include "qapi/error.h" 164240dceeSChuan Zheng #include "cpu.h" 174240dceeSChuan Zheng #include "exec/ramblock.h" 184240dceeSChuan Zheng #include "qemu/rcu_queue.h" 194240dceeSChuan Zheng #include "qapi/qapi-commands-migration.h" 203ded54b1SChuan Zheng #include "ram.h" 213c0b5dffSChuan Zheng #include "trace.h" 224240dceeSChuan Zheng #include "dirtyrate.h" 234240dceeSChuan Zheng 247df3aa30SChuan Zheng static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED; 25c9a58d71SChuan Zheng static struct DirtyRateStat DirtyStat; 267df3aa30SChuan Zheng 27eca58224SChuan Zheng static int64_t set_sample_page_period(int64_t msec, int64_t initial_time) 28eca58224SChuan Zheng { 29eca58224SChuan Zheng int64_t current_time; 30eca58224SChuan Zheng 31eca58224SChuan Zheng current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); 32eca58224SChuan Zheng if ((current_time - initial_time) >= msec) { 33eca58224SChuan Zheng msec = current_time - initial_time; 34eca58224SChuan Zheng } else { 35eca58224SChuan Zheng g_usleep((msec + initial_time - current_time) * 1000); 36eca58224SChuan Zheng } 37eca58224SChuan Zheng 38eca58224SChuan Zheng return msec; 39eca58224SChuan Zheng } 40eca58224SChuan Zheng 41eca58224SChuan Zheng static bool is_sample_period_valid(int64_t sec) 42eca58224SChuan Zheng { 43eca58224SChuan Zheng if (sec < MIN_FETCH_DIRTYRATE_TIME_SEC || 44eca58224SChuan Zheng sec > MAX_FETCH_DIRTYRATE_TIME_SEC) { 45eca58224SChuan Zheng return false; 46eca58224SChuan Zheng } 47eca58224SChuan Zheng 48eca58224SChuan Zheng return true; 49eca58224SChuan Zheng } 50eca58224SChuan Zheng 51*7afa08cdSHyman Huang(黄勇) static bool is_sample_pages_valid(int64_t pages) 52*7afa08cdSHyman Huang(黄勇) { 53*7afa08cdSHyman Huang(黄勇) return pages >= MIN_SAMPLE_PAGE_COUNT && 54*7afa08cdSHyman Huang(黄勇) pages <= MAX_SAMPLE_PAGE_COUNT; 55*7afa08cdSHyman Huang(黄勇) } 56*7afa08cdSHyman Huang(黄勇) 577df3aa30SChuan Zheng static int dirtyrate_set_state(int *state, int old_state, int new_state) 587df3aa30SChuan Zheng { 597df3aa30SChuan Zheng assert(new_state < DIRTY_RATE_STATUS__MAX); 603c0b5dffSChuan Zheng trace_dirtyrate_set_state(DirtyRateStatus_str(new_state)); 617df3aa30SChuan Zheng if (qatomic_cmpxchg(state, old_state, new_state) == old_state) { 627df3aa30SChuan Zheng return 0; 637df3aa30SChuan Zheng } else { 647df3aa30SChuan Zheng return -1; 657df3aa30SChuan Zheng } 667df3aa30SChuan Zheng } 677df3aa30SChuan Zheng 684c437254SChuan Zheng static struct DirtyRateInfo *query_dirty_rate_info(void) 694c437254SChuan Zheng { 704c437254SChuan Zheng int64_t dirty_rate = DirtyStat.dirty_rate; 714c437254SChuan Zheng struct DirtyRateInfo *info = g_malloc0(sizeof(DirtyRateInfo)); 724c437254SChuan Zheng 734c437254SChuan Zheng if (qatomic_read(&CalculatingState) == DIRTY_RATE_STATUS_MEASURED) { 74b1a859cfSChuan Zheng info->has_dirty_rate = true; 754c437254SChuan Zheng info->dirty_rate = dirty_rate; 764c437254SChuan Zheng } 774c437254SChuan Zheng 784c437254SChuan Zheng info->status = CalculatingState; 794c437254SChuan Zheng info->start_time = DirtyStat.start_time; 804c437254SChuan Zheng info->calc_time = DirtyStat.calc_time; 81*7afa08cdSHyman Huang(黄勇) info->sample_pages = DirtyStat.sample_pages; 824c437254SChuan Zheng 833c0b5dffSChuan Zheng trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState)); 843c0b5dffSChuan Zheng 854c437254SChuan Zheng return info; 864c437254SChuan Zheng } 874c437254SChuan Zheng 88*7afa08cdSHyman Huang(黄勇) static void init_dirtyrate_stat(int64_t start_time, int64_t calc_time, 89*7afa08cdSHyman Huang(黄勇) uint64_t sample_pages) 90c9a58d71SChuan Zheng { 91c9a58d71SChuan Zheng DirtyStat.total_dirty_samples = 0; 92c9a58d71SChuan Zheng DirtyStat.total_sample_count = 0; 93c9a58d71SChuan Zheng DirtyStat.total_block_mem_MB = 0; 94c9a58d71SChuan Zheng DirtyStat.dirty_rate = -1; 95aa84b506SChuan Zheng DirtyStat.start_time = start_time; 96aa84b506SChuan Zheng DirtyStat.calc_time = calc_time; 97*7afa08cdSHyman Huang(黄勇) DirtyStat.sample_pages = sample_pages; 98c9a58d71SChuan Zheng } 99c9a58d71SChuan Zheng 100c9a58d71SChuan Zheng static void update_dirtyrate_stat(struct RamblockDirtyInfo *info) 101c9a58d71SChuan Zheng { 102c9a58d71SChuan Zheng DirtyStat.total_dirty_samples += info->sample_dirty_count; 103c9a58d71SChuan Zheng DirtyStat.total_sample_count += info->sample_pages_count; 104c9a58d71SChuan Zheng /* size of total pages in MB */ 105c9a58d71SChuan Zheng DirtyStat.total_block_mem_MB += (info->ramblock_pages * 106c9a58d71SChuan Zheng TARGET_PAGE_SIZE) >> 20; 107c9a58d71SChuan Zheng } 108c9a58d71SChuan Zheng 109c9a58d71SChuan Zheng static void update_dirtyrate(uint64_t msec) 110c9a58d71SChuan Zheng { 111c9a58d71SChuan Zheng uint64_t dirtyrate; 112c9a58d71SChuan Zheng uint64_t total_dirty_samples = DirtyStat.total_dirty_samples; 113c9a58d71SChuan Zheng uint64_t total_sample_count = DirtyStat.total_sample_count; 114c9a58d71SChuan Zheng uint64_t total_block_mem_MB = DirtyStat.total_block_mem_MB; 115c9a58d71SChuan Zheng 116c9a58d71SChuan Zheng dirtyrate = total_dirty_samples * total_block_mem_MB * 117c9a58d71SChuan Zheng 1000 / (total_sample_count * msec); 118c9a58d71SChuan Zheng 119c9a58d71SChuan Zheng DirtyStat.dirty_rate = dirtyrate; 120c9a58d71SChuan Zheng } 1217df3aa30SChuan Zheng 122ba0e519fSChuan Zheng /* 123ba0e519fSChuan Zheng * get hash result for the sampled memory with length of TARGET_PAGE_SIZE 124ba0e519fSChuan Zheng * in ramblock, which starts from ramblock base address. 125ba0e519fSChuan Zheng */ 126ba0e519fSChuan Zheng static uint32_t get_ramblock_vfn_hash(struct RamblockDirtyInfo *info, 127ba0e519fSChuan Zheng uint64_t vfn) 128ba0e519fSChuan Zheng { 129ba0e519fSChuan Zheng uint32_t crc; 130ba0e519fSChuan Zheng 131ba0e519fSChuan Zheng crc = crc32(0, (info->ramblock_addr + 132ba0e519fSChuan Zheng vfn * TARGET_PAGE_SIZE), TARGET_PAGE_SIZE); 133ba0e519fSChuan Zheng 1343c0b5dffSChuan Zheng trace_get_ramblock_vfn_hash(info->idstr, vfn, crc); 135ba0e519fSChuan Zheng return crc; 136ba0e519fSChuan Zheng } 137ba0e519fSChuan Zheng 138ba0e519fSChuan Zheng static bool save_ramblock_hash(struct RamblockDirtyInfo *info) 139ba0e519fSChuan Zheng { 140ba0e519fSChuan Zheng unsigned int sample_pages_count; 141ba0e519fSChuan Zheng int i; 142ba0e519fSChuan Zheng GRand *rand; 143ba0e519fSChuan Zheng 144ba0e519fSChuan Zheng sample_pages_count = info->sample_pages_count; 145ba0e519fSChuan Zheng 146ba0e519fSChuan Zheng /* ramblock size less than one page, return success to skip this ramblock */ 147ba0e519fSChuan Zheng if (unlikely(info->ramblock_pages == 0 || sample_pages_count == 0)) { 148ba0e519fSChuan Zheng return true; 149ba0e519fSChuan Zheng } 150ba0e519fSChuan Zheng 151ba0e519fSChuan Zheng info->hash_result = g_try_malloc0_n(sample_pages_count, 152ba0e519fSChuan Zheng sizeof(uint32_t)); 153ba0e519fSChuan Zheng if (!info->hash_result) { 154ba0e519fSChuan Zheng return false; 155ba0e519fSChuan Zheng } 156ba0e519fSChuan Zheng 157ba0e519fSChuan Zheng info->sample_page_vfn = g_try_malloc0_n(sample_pages_count, 158ba0e519fSChuan Zheng sizeof(uint64_t)); 159ba0e519fSChuan Zheng if (!info->sample_page_vfn) { 160ba0e519fSChuan Zheng g_free(info->hash_result); 161ba0e519fSChuan Zheng return false; 162ba0e519fSChuan Zheng } 163ba0e519fSChuan Zheng 164ba0e519fSChuan Zheng rand = g_rand_new(); 165ba0e519fSChuan Zheng for (i = 0; i < sample_pages_count; i++) { 166ba0e519fSChuan Zheng info->sample_page_vfn[i] = g_rand_int_range(rand, 0, 167ba0e519fSChuan Zheng info->ramblock_pages - 1); 168ba0e519fSChuan Zheng info->hash_result[i] = get_ramblock_vfn_hash(info, 169ba0e519fSChuan Zheng info->sample_page_vfn[i]); 170ba0e519fSChuan Zheng } 171ba0e519fSChuan Zheng g_rand_free(rand); 172ba0e519fSChuan Zheng 173ba0e519fSChuan Zheng return true; 174ba0e519fSChuan Zheng } 175ba0e519fSChuan Zheng 176ba0e519fSChuan Zheng static void get_ramblock_dirty_info(RAMBlock *block, 177ba0e519fSChuan Zheng struct RamblockDirtyInfo *info, 178ba0e519fSChuan Zheng struct DirtyRateConfig *config) 179ba0e519fSChuan Zheng { 180ba0e519fSChuan Zheng uint64_t sample_pages_per_gigabytes = config->sample_pages_per_gigabytes; 181ba0e519fSChuan Zheng 182ba0e519fSChuan Zheng /* Right shift 30 bits to calc ramblock size in GB */ 183ba0e519fSChuan Zheng info->sample_pages_count = (qemu_ram_get_used_length(block) * 184ba0e519fSChuan Zheng sample_pages_per_gigabytes) >> 30; 185ba0e519fSChuan Zheng /* Right shift TARGET_PAGE_BITS to calc page count */ 186ba0e519fSChuan Zheng info->ramblock_pages = qemu_ram_get_used_length(block) >> 187ba0e519fSChuan Zheng TARGET_PAGE_BITS; 188ba0e519fSChuan Zheng info->ramblock_addr = qemu_ram_get_host_addr(block); 189ba0e519fSChuan Zheng strcpy(info->idstr, qemu_ram_get_idstr(block)); 190ba0e519fSChuan Zheng } 191ba0e519fSChuan Zheng 192cf0bbb49SChuan Zheng static void free_ramblock_dirty_info(struct RamblockDirtyInfo *infos, int count) 193cf0bbb49SChuan Zheng { 194cf0bbb49SChuan Zheng int i; 195cf0bbb49SChuan Zheng 196cf0bbb49SChuan Zheng if (!infos) { 197cf0bbb49SChuan Zheng return; 198cf0bbb49SChuan Zheng } 199cf0bbb49SChuan Zheng 200cf0bbb49SChuan Zheng for (i = 0; i < count; i++) { 201cf0bbb49SChuan Zheng g_free(infos[i].sample_page_vfn); 202cf0bbb49SChuan Zheng g_free(infos[i].hash_result); 203cf0bbb49SChuan Zheng } 204cf0bbb49SChuan Zheng g_free(infos); 205cf0bbb49SChuan Zheng } 206cf0bbb49SChuan Zheng 207f82583cdSChuan Zheng static bool skip_sample_ramblock(RAMBlock *block) 208f82583cdSChuan Zheng { 209f82583cdSChuan Zheng /* 210f82583cdSChuan Zheng * Sample only blocks larger than MIN_RAMBLOCK_SIZE. 211f82583cdSChuan Zheng */ 212f82583cdSChuan Zheng if (qemu_ram_get_used_length(block) < (MIN_RAMBLOCK_SIZE << 10)) { 2133c0b5dffSChuan Zheng trace_skip_sample_ramblock(block->idstr, 2143c0b5dffSChuan Zheng qemu_ram_get_used_length(block)); 215f82583cdSChuan Zheng return true; 216f82583cdSChuan Zheng } 217f82583cdSChuan Zheng 218f82583cdSChuan Zheng return false; 219f82583cdSChuan Zheng } 220f82583cdSChuan Zheng 221ba0e519fSChuan Zheng static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, 222ba0e519fSChuan Zheng struct DirtyRateConfig config, 223ba0e519fSChuan Zheng int *block_count) 224ba0e519fSChuan Zheng { 225ba0e519fSChuan Zheng struct RamblockDirtyInfo *info = NULL; 226ba0e519fSChuan Zheng struct RamblockDirtyInfo *dinfo = NULL; 227ba0e519fSChuan Zheng RAMBlock *block = NULL; 228ba0e519fSChuan Zheng int total_count = 0; 229ba0e519fSChuan Zheng int index = 0; 230ba0e519fSChuan Zheng bool ret = false; 231ba0e519fSChuan Zheng 232ba0e519fSChuan Zheng RAMBLOCK_FOREACH_MIGRATABLE(block) { 233f82583cdSChuan Zheng if (skip_sample_ramblock(block)) { 234f82583cdSChuan Zheng continue; 235f82583cdSChuan Zheng } 236ba0e519fSChuan Zheng total_count++; 237ba0e519fSChuan Zheng } 238ba0e519fSChuan Zheng 239ba0e519fSChuan Zheng dinfo = g_try_malloc0_n(total_count, sizeof(struct RamblockDirtyInfo)); 240ba0e519fSChuan Zheng if (dinfo == NULL) { 241ba0e519fSChuan Zheng goto out; 242ba0e519fSChuan Zheng } 243ba0e519fSChuan Zheng 244ba0e519fSChuan Zheng RAMBLOCK_FOREACH_MIGRATABLE(block) { 245f82583cdSChuan Zheng if (skip_sample_ramblock(block)) { 246f82583cdSChuan Zheng continue; 247f82583cdSChuan Zheng } 248ba0e519fSChuan Zheng if (index >= total_count) { 249ba0e519fSChuan Zheng break; 250ba0e519fSChuan Zheng } 251ba0e519fSChuan Zheng info = &dinfo[index]; 252ba0e519fSChuan Zheng get_ramblock_dirty_info(block, info, &config); 253ba0e519fSChuan Zheng if (!save_ramblock_hash(info)) { 254ba0e519fSChuan Zheng goto out; 255ba0e519fSChuan Zheng } 256ba0e519fSChuan Zheng index++; 257ba0e519fSChuan Zheng } 258ba0e519fSChuan Zheng ret = true; 259ba0e519fSChuan Zheng 260ba0e519fSChuan Zheng out: 261ba0e519fSChuan Zheng *block_count = index; 262ba0e519fSChuan Zheng *block_dinfo = dinfo; 263ba0e519fSChuan Zheng return ret; 264ba0e519fSChuan Zheng } 265ba0e519fSChuan Zheng 2669c04387bSChuan Zheng static void calc_page_dirty_rate(struct RamblockDirtyInfo *info) 2679c04387bSChuan Zheng { 2689c04387bSChuan Zheng uint32_t crc; 2699c04387bSChuan Zheng int i; 2709c04387bSChuan Zheng 2719c04387bSChuan Zheng for (i = 0; i < info->sample_pages_count; i++) { 2729c04387bSChuan Zheng crc = get_ramblock_vfn_hash(info, info->sample_page_vfn[i]); 2739c04387bSChuan Zheng if (crc != info->hash_result[i]) { 2743c0b5dffSChuan Zheng trace_calc_page_dirty_rate(info->idstr, crc, info->hash_result[i]); 2759c04387bSChuan Zheng info->sample_dirty_count++; 2769c04387bSChuan Zheng } 2779c04387bSChuan Zheng } 2789c04387bSChuan Zheng } 2799c04387bSChuan Zheng 2809c04387bSChuan Zheng static struct RamblockDirtyInfo * 2819c04387bSChuan Zheng find_block_matched(RAMBlock *block, int count, 2829c04387bSChuan Zheng struct RamblockDirtyInfo *infos) 2839c04387bSChuan Zheng { 2849c04387bSChuan Zheng int i; 2859c04387bSChuan Zheng struct RamblockDirtyInfo *matched; 2869c04387bSChuan Zheng 2879c04387bSChuan Zheng for (i = 0; i < count; i++) { 2889c04387bSChuan Zheng if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) { 2899c04387bSChuan Zheng break; 2909c04387bSChuan Zheng } 2919c04387bSChuan Zheng } 2929c04387bSChuan Zheng 2939c04387bSChuan Zheng if (i == count) { 2949c04387bSChuan Zheng return NULL; 2959c04387bSChuan Zheng } 2969c04387bSChuan Zheng 2979c04387bSChuan Zheng if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) || 2989c04387bSChuan Zheng infos[i].ramblock_pages != 2999c04387bSChuan Zheng (qemu_ram_get_used_length(block) >> TARGET_PAGE_BITS)) { 3003c0b5dffSChuan Zheng trace_find_page_matched(block->idstr); 3019c04387bSChuan Zheng return NULL; 3029c04387bSChuan Zheng } 3039c04387bSChuan Zheng 3049c04387bSChuan Zheng matched = &infos[i]; 3059c04387bSChuan Zheng 3069c04387bSChuan Zheng return matched; 3079c04387bSChuan Zheng } 3089c04387bSChuan Zheng 3099c04387bSChuan Zheng static bool compare_page_hash_info(struct RamblockDirtyInfo *info, 3109c04387bSChuan Zheng int block_count) 3119c04387bSChuan Zheng { 3129c04387bSChuan Zheng struct RamblockDirtyInfo *block_dinfo = NULL; 3139c04387bSChuan Zheng RAMBlock *block = NULL; 3149c04387bSChuan Zheng 3159c04387bSChuan Zheng RAMBLOCK_FOREACH_MIGRATABLE(block) { 316f82583cdSChuan Zheng if (skip_sample_ramblock(block)) { 317f82583cdSChuan Zheng continue; 318f82583cdSChuan Zheng } 3199c04387bSChuan Zheng block_dinfo = find_block_matched(block, block_count, info); 3209c04387bSChuan Zheng if (block_dinfo == NULL) { 3219c04387bSChuan Zheng continue; 3229c04387bSChuan Zheng } 3239c04387bSChuan Zheng calc_page_dirty_rate(block_dinfo); 3249c04387bSChuan Zheng update_dirtyrate_stat(block_dinfo); 3259c04387bSChuan Zheng } 3269c04387bSChuan Zheng 3279c04387bSChuan Zheng if (DirtyStat.total_sample_count == 0) { 3289c04387bSChuan Zheng return false; 3299c04387bSChuan Zheng } 3309c04387bSChuan Zheng 3319c04387bSChuan Zheng return true; 3329c04387bSChuan Zheng } 3339c04387bSChuan Zheng 3344240dceeSChuan Zheng static void calculate_dirtyrate(struct DirtyRateConfig config) 3354240dceeSChuan Zheng { 336cf0bbb49SChuan Zheng struct RamblockDirtyInfo *block_dinfo = NULL; 337cf0bbb49SChuan Zheng int block_count = 0; 338cf0bbb49SChuan Zheng int64_t msec = 0; 339cf0bbb49SChuan Zheng int64_t initial_time; 340cf0bbb49SChuan Zheng 341cf0bbb49SChuan Zheng rcu_register_thread(); 342cf0bbb49SChuan Zheng rcu_read_lock(); 343cf0bbb49SChuan Zheng initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); 344cf0bbb49SChuan Zheng if (!record_ramblock_hash_info(&block_dinfo, config, &block_count)) { 345cf0bbb49SChuan Zheng goto out; 346cf0bbb49SChuan Zheng } 347cf0bbb49SChuan Zheng rcu_read_unlock(); 348cf0bbb49SChuan Zheng 349cf0bbb49SChuan Zheng msec = config.sample_period_seconds * 1000; 350cf0bbb49SChuan Zheng msec = set_sample_page_period(msec, initial_time); 3514c437254SChuan Zheng DirtyStat.start_time = initial_time / 1000; 3524c437254SChuan Zheng DirtyStat.calc_time = msec / 1000; 353cf0bbb49SChuan Zheng 354cf0bbb49SChuan Zheng rcu_read_lock(); 355cf0bbb49SChuan Zheng if (!compare_page_hash_info(block_dinfo, block_count)) { 356cf0bbb49SChuan Zheng goto out; 357cf0bbb49SChuan Zheng } 358cf0bbb49SChuan Zheng 359cf0bbb49SChuan Zheng update_dirtyrate(msec); 360cf0bbb49SChuan Zheng 361cf0bbb49SChuan Zheng out: 362cf0bbb49SChuan Zheng rcu_read_unlock(); 363cf0bbb49SChuan Zheng free_ramblock_dirty_info(block_dinfo, block_count); 364cf0bbb49SChuan Zheng rcu_unregister_thread(); 3654240dceeSChuan Zheng } 3664240dceeSChuan Zheng 3674240dceeSChuan Zheng void *get_dirtyrate_thread(void *arg) 3684240dceeSChuan Zheng { 3694240dceeSChuan Zheng struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg; 3707df3aa30SChuan Zheng int ret; 371aa84b506SChuan Zheng int64_t start_time; 372aa84b506SChuan Zheng int64_t calc_time; 373*7afa08cdSHyman Huang(黄勇) uint64_t sample_pages; 3747df3aa30SChuan Zheng 3757df3aa30SChuan Zheng ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED, 3767df3aa30SChuan Zheng DIRTY_RATE_STATUS_MEASURING); 3777df3aa30SChuan Zheng if (ret == -1) { 3787df3aa30SChuan Zheng error_report("change dirtyrate state failed."); 3797df3aa30SChuan Zheng return NULL; 3807df3aa30SChuan Zheng } 3814240dceeSChuan Zheng 382aa84b506SChuan Zheng start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000; 383aa84b506SChuan Zheng calc_time = config.sample_period_seconds; 384*7afa08cdSHyman Huang(黄勇) sample_pages = config.sample_pages_per_gigabytes; 385*7afa08cdSHyman Huang(黄勇) init_dirtyrate_stat(start_time, calc_time, sample_pages); 386aa84b506SChuan Zheng 3874240dceeSChuan Zheng calculate_dirtyrate(config); 3884240dceeSChuan Zheng 3897df3aa30SChuan Zheng ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_MEASURING, 3907df3aa30SChuan Zheng DIRTY_RATE_STATUS_MEASURED); 3917df3aa30SChuan Zheng if (ret == -1) { 3927df3aa30SChuan Zheng error_report("change dirtyrate state failed."); 3937df3aa30SChuan Zheng } 3944240dceeSChuan Zheng return NULL; 3954240dceeSChuan Zheng } 3964c437254SChuan Zheng 397*7afa08cdSHyman Huang(黄勇) void qmp_calc_dirty_rate(int64_t calc_time, bool has_sample_pages, 398*7afa08cdSHyman Huang(黄勇) int64_t sample_pages, Error **errp) 3994c437254SChuan Zheng { 4004c437254SChuan Zheng static struct DirtyRateConfig config; 4014c437254SChuan Zheng QemuThread thread; 4024c437254SChuan Zheng int ret; 4034c437254SChuan Zheng 4044c437254SChuan Zheng /* 4054c437254SChuan Zheng * If the dirty rate is already being measured, don't attempt to start. 4064c437254SChuan Zheng */ 4074c437254SChuan Zheng if (qatomic_read(&CalculatingState) == DIRTY_RATE_STATUS_MEASURING) { 4084c437254SChuan Zheng error_setg(errp, "the dirty rate is already being measured."); 4094c437254SChuan Zheng return; 4104c437254SChuan Zheng } 4114c437254SChuan Zheng 4124c437254SChuan Zheng if (!is_sample_period_valid(calc_time)) { 4134c437254SChuan Zheng error_setg(errp, "calc-time is out of range[%d, %d].", 4144c437254SChuan Zheng MIN_FETCH_DIRTYRATE_TIME_SEC, 4154c437254SChuan Zheng MAX_FETCH_DIRTYRATE_TIME_SEC); 4164c437254SChuan Zheng return; 4174c437254SChuan Zheng } 4184c437254SChuan Zheng 419*7afa08cdSHyman Huang(黄勇) if (has_sample_pages) { 420*7afa08cdSHyman Huang(黄勇) if (!is_sample_pages_valid(sample_pages)) { 421*7afa08cdSHyman Huang(黄勇) error_setg(errp, "sample-pages is out of range[%d, %d].", 422*7afa08cdSHyman Huang(黄勇) MIN_SAMPLE_PAGE_COUNT, 423*7afa08cdSHyman Huang(黄勇) MAX_SAMPLE_PAGE_COUNT); 424*7afa08cdSHyman Huang(黄勇) return; 425*7afa08cdSHyman Huang(黄勇) } 426*7afa08cdSHyman Huang(黄勇) } else { 427*7afa08cdSHyman Huang(黄勇) sample_pages = DIRTYRATE_DEFAULT_SAMPLE_PAGES; 428*7afa08cdSHyman Huang(黄勇) } 429*7afa08cdSHyman Huang(黄勇) 4304c437254SChuan Zheng /* 4314c437254SChuan Zheng * Init calculation state as unstarted. 4324c437254SChuan Zheng */ 4334c437254SChuan Zheng ret = dirtyrate_set_state(&CalculatingState, CalculatingState, 4344c437254SChuan Zheng DIRTY_RATE_STATUS_UNSTARTED); 4354c437254SChuan Zheng if (ret == -1) { 4364c437254SChuan Zheng error_setg(errp, "init dirty rate calculation state failed."); 4374c437254SChuan Zheng return; 4384c437254SChuan Zheng } 4394c437254SChuan Zheng 4404c437254SChuan Zheng config.sample_period_seconds = calc_time; 441*7afa08cdSHyman Huang(黄勇) config.sample_pages_per_gigabytes = sample_pages; 4424c437254SChuan Zheng qemu_thread_create(&thread, "get_dirtyrate", get_dirtyrate_thread, 4434c437254SChuan Zheng (void *)&config, QEMU_THREAD_DETACHED); 4444c437254SChuan Zheng } 4454c437254SChuan Zheng 4464c437254SChuan Zheng struct DirtyRateInfo *qmp_query_dirty_rate(Error **errp) 4474c437254SChuan Zheng { 4484c437254SChuan Zheng return query_dirty_rate_info(); 4494c437254SChuan Zheng } 450