1 /* 2 * Dirtyrate common functions 3 * 4 * Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD. 5 * 6 * Authors: 7 * Chuan Zheng <zhengchuan@huawei.com> 8 * 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. 11 */ 12 13 #ifndef QEMU_MIGRATION_DIRTYRATE_H 14 #define QEMU_MIGRATION_DIRTYRATE_H 15 16 /* 17 * Sample 512 pages per GB as default. 18 * TODO: Make it configurable. 19 */ 20 #define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512 21 22 /* 23 * Record ramblock idstr 24 */ 25 #define RAMBLOCK_INFO_MAX_LEN 256 26 27 /* 28 * Minimum RAMBlock size to sample, in megabytes. 29 */ 30 #define MIN_RAMBLOCK_SIZE 128 31 32 /* 33 * Take 1s as minimum time for calculation duration 34 */ 35 #define MIN_FETCH_DIRTYRATE_TIME_SEC 1 36 #define MAX_FETCH_DIRTYRATE_TIME_SEC 60 37 38 struct DirtyRateConfig { 39 uint64_t sample_pages_per_gigabytes; /* sample pages per GB */ 40 int64_t sample_period_seconds; /* time duration between two sampling */ 41 }; 42 43 /* 44 * Store dirtypage info for each ramblock. 45 */ 46 struct RamblockDirtyInfo { 47 char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */ 48 uint8_t *ramblock_addr; /* base address of ramblock we measure */ 49 uint64_t ramblock_pages; /* ramblock size in TARGET_PAGE_SIZE */ 50 uint64_t *sample_page_vfn; /* relative offset address for sampled page */ 51 uint64_t sample_pages_count; /* count of sampled pages */ 52 uint64_t sample_dirty_count; /* count of dirty pages we measure */ 53 uint32_t *hash_result; /* array of hash result for sampled pages */ 54 }; 55 56 /* 57 * Store calculation statistics for each measure. 58 */ 59 struct DirtyRateStat { 60 uint64_t total_dirty_samples; /* total dirty sampled page */ 61 uint64_t total_sample_count; /* total sampled pages */ 62 uint64_t total_block_mem_MB; /* size of total sampled pages in MB */ 63 int64_t dirty_rate; /* dirty rate in MB/s */ 64 int64_t start_time; /* calculation start time in units of second */ 65 int64_t calc_time; /* time duration of two sampling in units of second */ 66 }; 67 68 void *get_dirtyrate_thread(void *arg); 69 #endif 70