86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*
|
|
* Dirtyrate common functions
|
|
*
|
|
* Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
|
|
*
|
|
* Authors:
|
|
* Chuan Zheng <zhengchuan@huawei.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef QEMU_MIGRATION_DIRTYRATE_H
|
|
#define QEMU_MIGRATION_DIRTYRATE_H
|
|
|
|
#include "sysemu/dirtyrate.h"
|
|
|
|
/*
|
|
* Sample 512 pages per GB as default.
|
|
*/
|
|
#define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512
|
|
|
|
/*
|
|
* Record ramblock idstr
|
|
*/
|
|
#define RAMBLOCK_INFO_MAX_LEN 256
|
|
|
|
/*
|
|
* Minimum RAMBlock size to sample, in megabytes.
|
|
*/
|
|
#define MIN_RAMBLOCK_SIZE 128
|
|
|
|
/*
|
|
* Take 1s as minimum time for calculation duration
|
|
*/
|
|
#define MIN_FETCH_DIRTYRATE_TIME_SEC 1
|
|
#define MAX_FETCH_DIRTYRATE_TIME_SEC 60
|
|
|
|
/*
|
|
* Take 1/16 pages in 1G as the maxmum sample page count
|
|
*/
|
|
#define MIN_SAMPLE_PAGE_COUNT 128
|
|
#define MAX_SAMPLE_PAGE_COUNT 16384
|
|
|
|
struct DirtyRateConfig {
|
|
uint64_t sample_pages_per_gigabytes; /* sample pages per GB */
|
|
int64_t sample_period_seconds; /* time duration between two sampling */
|
|
DirtyRateMeasureMode mode; /* mode of dirtyrate measurement */
|
|
};
|
|
|
|
/*
|
|
* Store dirtypage info for each ramblock.
|
|
*/
|
|
struct RamblockDirtyInfo {
|
|
char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */
|
|
uint8_t *ramblock_addr; /* base address of ramblock we measure */
|
|
uint64_t ramblock_pages; /* ramblock size in TARGET_PAGE_SIZE */
|
|
uint64_t *sample_page_vfn; /* relative offset address for sampled page */
|
|
uint64_t sample_pages_count; /* count of sampled pages */
|
|
uint64_t sample_dirty_count; /* count of dirty pages we measure */
|
|
uint32_t *hash_result; /* array of hash result for sampled pages */
|
|
};
|
|
|
|
typedef struct SampleVMStat {
|
|
uint64_t total_dirty_samples; /* total dirty sampled page */
|
|
uint64_t total_sample_count; /* total sampled pages */
|
|
uint64_t total_block_mem_MB; /* size of total sampled pages in MB */
|
|
} SampleVMStat;
|
|
|
|
/*
|
|
* Store calculation statistics for each measure.
|
|
*/
|
|
struct DirtyRateStat {
|
|
int64_t dirty_rate; /* dirty rate in MB/s */
|
|
int64_t start_time; /* calculation start time in units of second */
|
|
int64_t calc_time; /* time duration of two sampling in units of second */
|
|
uint64_t sample_pages; /* sample pages per GB */
|
|
union {
|
|
SampleVMStat page_sampling;
|
|
VcpuStat dirty_ring;
|
|
};
|
|
};
|
|
|
|
void *get_dirtyrate_thread(void *arg);
|
|
#endif
|