71864eadd9
introduce "DirtyRateMeasureMode" to specify what method should be used to calculate dirty rate, introduce "DirtyRateVcpu" to store dirty rate for each vcpu. use union to store stat data of specific mode Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> Message-Id: <661c98c40f40e163aa58334337af8f3ddf41316a.1624040308.git.huangy81@chinatelecom.cn> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/*
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* Dirtyrate common functions
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*
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* Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* Authors:
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* Chuan Zheng <zhengchuan@huawei.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_MIGRATION_DIRTYRATE_H
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#define QEMU_MIGRATION_DIRTYRATE_H
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/*
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* Sample 512 pages per GB as default.
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*/
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#define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512
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/*
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* Record ramblock idstr
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*/
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#define RAMBLOCK_INFO_MAX_LEN 256
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/*
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* Minimum RAMBlock size to sample, in megabytes.
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*/
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#define MIN_RAMBLOCK_SIZE 128
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/*
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* Take 1s as minimum time for calculation duration
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*/
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#define MIN_FETCH_DIRTYRATE_TIME_SEC 1
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#define MAX_FETCH_DIRTYRATE_TIME_SEC 60
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/*
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* Take 1/16 pages in 1G as the maxmum sample page count
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*/
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#define MIN_SAMPLE_PAGE_COUNT 128
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#define MAX_SAMPLE_PAGE_COUNT 16384
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struct DirtyRateConfig {
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uint64_t sample_pages_per_gigabytes; /* sample pages per GB */
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int64_t sample_period_seconds; /* time duration between two sampling */
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DirtyRateMeasureMode mode; /* mode of dirtyrate measurement */
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};
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/*
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* Store dirtypage info for each ramblock.
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*/
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struct RamblockDirtyInfo {
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char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */
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uint8_t *ramblock_addr; /* base address of ramblock we measure */
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uint64_t ramblock_pages; /* ramblock size in TARGET_PAGE_SIZE */
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uint64_t *sample_page_vfn; /* relative offset address for sampled page */
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uint64_t sample_pages_count; /* count of sampled pages */
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uint64_t sample_dirty_count; /* count of dirty pages we measure */
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uint32_t *hash_result; /* array of hash result for sampled pages */
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};
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typedef struct SampleVMStat {
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uint64_t total_dirty_samples; /* total dirty sampled page */
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uint64_t total_sample_count; /* total sampled pages */
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uint64_t total_block_mem_MB; /* size of total sampled pages in MB */
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} SampleVMStat;
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typedef struct VcpuStat {
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int nvcpu; /* number of vcpu */
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DirtyRateVcpu *rates; /* array of dirty rate for each vcpu */
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} VcpuStat;
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/*
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* Store calculation statistics for each measure.
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*/
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struct DirtyRateStat {
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int64_t dirty_rate; /* dirty rate in MB/s */
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int64_t start_time; /* calculation start time in units of second */
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int64_t calc_time; /* time duration of two sampling in units of second */
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uint64_t sample_pages; /* sample pages per GB */
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union {
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SampleVMStat page_sampling;
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VcpuStat dirty_ring;
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};
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};
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void *get_dirtyrate_thread(void *arg);
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#endif
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