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4240dcee CZ |
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 | ||
8244166d HH |
16 | #include "sysemu/dirtyrate.h" |
17 | ||
4240dcee CZ |
18 | /* |
19 | * Sample 512 pages per GB as default. | |
4240dcee CZ |
20 | */ |
21 | #define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512 | |
22 | ||
a2635f0a CZ |
23 | /* |
24 | * Record ramblock idstr | |
25 | */ | |
26 | #define RAMBLOCK_INFO_MAX_LEN 256 | |
27 | ||
f82583cd CZ |
28 | /* |
29 | * Minimum RAMBlock size to sample, in megabytes. | |
30 | */ | |
31 | #define MIN_RAMBLOCK_SIZE 128 | |
32 | ||
eca58224 | 33 | /* |
34a68001 AG |
34 | * Allowed range for dirty page rate calculation (in milliseconds). |
35 | * Lower limit relates to the smallest realistic downtime it | |
36 | * makes sense to impose on migration. | |
eca58224 | 37 | */ |
34a68001 AG |
38 | #define MIN_CALC_TIME_MS 50 |
39 | #define MAX_CALC_TIME_MS 60000 | |
eca58224 | 40 | |
7afa08cd HH |
41 | /* |
42 | * Take 1/16 pages in 1G as the maxmum sample page count | |
43 | */ | |
44 | #define MIN_SAMPLE_PAGE_COUNT 128 | |
45 | #define MAX_SAMPLE_PAGE_COUNT 16384 | |
46 | ||
4240dcee CZ |
47 | struct DirtyRateConfig { |
48 | uint64_t sample_pages_per_gigabytes; /* sample pages per GB */ | |
34a68001 | 49 | int64_t calc_time_ms; /* desired calculation time (in milliseconds) */ |
71864ead | 50 | DirtyRateMeasureMode mode; /* mode of dirtyrate measurement */ |
4240dcee CZ |
51 | }; |
52 | ||
a2635f0a CZ |
53 | /* |
54 | * Store dirtypage info for each ramblock. | |
55 | */ | |
56 | struct RamblockDirtyInfo { | |
57 | char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */ | |
58 | uint8_t *ramblock_addr; /* base address of ramblock we measure */ | |
59 | uint64_t ramblock_pages; /* ramblock size in TARGET_PAGE_SIZE */ | |
60 | uint64_t *sample_page_vfn; /* relative offset address for sampled page */ | |
61 | uint64_t sample_pages_count; /* count of sampled pages */ | |
62 | uint64_t sample_dirty_count; /* count of dirty pages we measure */ | |
63 | uint32_t *hash_result; /* array of hash result for sampled pages */ | |
64 | }; | |
65 | ||
71864ead HH |
66 | typedef struct SampleVMStat { |
67 | uint64_t total_dirty_samples; /* total dirty sampled page */ | |
68 | uint64_t total_sample_count; /* total sampled pages */ | |
69 | uint64_t total_block_mem_MB; /* size of total sampled pages in MB */ | |
70 | } SampleVMStat; | |
71 | ||
c9a58d71 CZ |
72 | /* |
73 | * Store calculation statistics for each measure. | |
74 | */ | |
75 | struct DirtyRateStat { | |
c9a58d71 CZ |
76 | int64_t dirty_rate; /* dirty rate in MB/s */ |
77 | int64_t start_time; /* calculation start time in units of second */ | |
34a68001 | 78 | int64_t calc_time_ms; /* actual calculation time (in milliseconds) */ |
7afa08cd | 79 | uint64_t sample_pages; /* sample pages per GB */ |
71864ead HH |
80 | union { |
81 | SampleVMStat page_sampling; | |
82 | VcpuStat dirty_ring; | |
83 | }; | |
c9a58d71 CZ |
84 | }; |
85 | ||
4240dcee CZ |
86 | void *get_dirtyrate_thread(void *arg); |
87 | #endif |