2020-09-16 08:21:56 +02:00
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/*
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* Dirtyrate implement code
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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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#include "qemu/osdep.h"
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2020-10-08 18:59:53 +02:00
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#include <zlib.h>
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2020-09-16 08:21:56 +02:00
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#include "qapi/error.h"
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#include "cpu.h"
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#include "exec/ramblock.h"
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2021-07-20 17:19:17 +02:00
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#include "exec/ram_addr.h"
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2020-09-16 08:21:56 +02:00
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#include "qemu/rcu_queue.h"
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2021-06-29 18:01:23 +02:00
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#include "qemu/main-loop.h"
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2020-09-16 08:21:56 +02:00
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#include "qapi/qapi-commands-migration.h"
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2020-09-16 08:22:00 +02:00
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#include "ram.h"
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2020-09-16 08:22:07 +02:00
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#include "trace.h"
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2020-09-16 08:21:56 +02:00
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#include "dirtyrate.h"
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2021-06-07 03:11:57 +02:00
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#include "monitor/hmp.h"
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#include "monitor/monitor.h"
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#include "qapi/qmp/qdict.h"
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2021-06-29 18:01:23 +02:00
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#include "sysemu/kvm.h"
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#include "sysemu/runstate.h"
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#include "exec/memory.h"
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2021-07-20 17:19:16 +02:00
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/*
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* total_dirty_pages is procted by BQL and is used
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* to stat dirty pages during the period of two
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* memory_global_dirty_log_sync
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*/
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uint64_t total_dirty_pages;
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2021-06-29 18:01:23 +02:00
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typedef struct DirtyPageRecord {
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uint64_t start_pages;
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uint64_t end_pages;
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} DirtyPageRecord;
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2020-09-16 08:21:56 +02:00
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2020-09-16 08:21:57 +02:00
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static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED;
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2020-09-16 08:21:59 +02:00
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static struct DirtyRateStat DirtyStat;
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2021-06-29 18:01:23 +02:00
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static DirtyRateMeasureMode dirtyrate_mode =
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DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING;
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2020-09-16 08:21:57 +02:00
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2022-06-25 19:38:32 +02:00
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static int64_t dirty_stat_wait(int64_t msec, int64_t initial_time)
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2020-09-16 08:22:04 +02:00
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{
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int64_t current_time;
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current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
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if ((current_time - initial_time) >= msec) {
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msec = current_time - initial_time;
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} else {
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g_usleep((msec + initial_time - current_time) * 1000);
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}
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return msec;
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}
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2022-06-25 19:38:32 +02:00
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static inline void record_dirtypages(DirtyPageRecord *dirty_pages,
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CPUState *cpu, bool start)
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{
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if (start) {
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dirty_pages[cpu->cpu_index].start_pages = cpu->dirty_pages;
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} else {
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dirty_pages[cpu->cpu_index].end_pages = cpu->dirty_pages;
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}
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}
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static int64_t do_calculate_dirtyrate(DirtyPageRecord dirty_pages,
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int64_t calc_time_ms)
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{
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uint64_t memory_size_MB;
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uint64_t increased_dirty_pages =
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dirty_pages.end_pages - dirty_pages.start_pages;
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memory_size_MB = (increased_dirty_pages * TARGET_PAGE_SIZE) >> 20;
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return memory_size_MB * 1000 / calc_time_ms;
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}
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void global_dirty_log_change(unsigned int flag, bool start)
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{
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qemu_mutex_lock_iothread();
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if (start) {
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memory_global_dirty_log_start(flag);
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} else {
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memory_global_dirty_log_stop(flag);
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}
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qemu_mutex_unlock_iothread();
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}
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/*
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* global_dirty_log_sync
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* 1. sync dirty log from kvm
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* 2. stop dirty tracking if needed.
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*/
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static void global_dirty_log_sync(unsigned int flag, bool one_shot)
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{
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qemu_mutex_lock_iothread();
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memory_global_dirty_log_sync();
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if (one_shot) {
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memory_global_dirty_log_stop(flag);
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}
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qemu_mutex_unlock_iothread();
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}
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static DirtyPageRecord *vcpu_dirty_stat_alloc(VcpuStat *stat)
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{
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CPUState *cpu;
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int nvcpu = 0;
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CPU_FOREACH(cpu) {
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nvcpu++;
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}
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stat->nvcpu = nvcpu;
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2022-09-23 10:42:54 +02:00
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stat->rates = g_new0(DirtyRateVcpu, nvcpu);
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2022-06-25 19:38:32 +02:00
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2022-11-22 14:49:16 +01:00
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return g_new0(DirtyPageRecord, nvcpu);
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2022-06-25 19:38:32 +02:00
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}
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static void vcpu_dirty_stat_collect(VcpuStat *stat,
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DirtyPageRecord *records,
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bool start)
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{
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CPUState *cpu;
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CPU_FOREACH(cpu) {
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record_dirtypages(records, cpu, start);
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}
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}
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int64_t vcpu_calculate_dirtyrate(int64_t calc_time_ms,
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VcpuStat *stat,
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unsigned int flag,
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bool one_shot)
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{
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DirtyPageRecord *records;
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int64_t init_time_ms;
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int64_t duration;
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int64_t dirtyrate;
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int i = 0;
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unsigned int gen_id;
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retry:
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init_time_ms = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
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cpu_list_lock();
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gen_id = cpu_list_generation_id_get();
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records = vcpu_dirty_stat_alloc(stat);
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vcpu_dirty_stat_collect(stat, records, true);
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cpu_list_unlock();
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duration = dirty_stat_wait(calc_time_ms, init_time_ms);
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global_dirty_log_sync(flag, one_shot);
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cpu_list_lock();
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if (gen_id != cpu_list_generation_id_get()) {
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g_free(records);
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g_free(stat->rates);
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cpu_list_unlock();
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goto retry;
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}
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vcpu_dirty_stat_collect(stat, records, false);
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cpu_list_unlock();
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for (i = 0; i < stat->nvcpu; i++) {
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dirtyrate = do_calculate_dirtyrate(records[i], duration);
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stat->rates[i].id = i;
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stat->rates[i].dirty_rate = dirtyrate;
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trace_dirtyrate_do_calculate_vcpu(i, dirtyrate);
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}
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g_free(records);
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return duration;
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}
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2020-09-16 08:22:04 +02:00
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static bool is_sample_period_valid(int64_t sec)
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{
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if (sec < MIN_FETCH_DIRTYRATE_TIME_SEC ||
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sec > MAX_FETCH_DIRTYRATE_TIME_SEC) {
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return false;
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}
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return true;
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}
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2021-06-07 03:11:34 +02:00
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static bool is_sample_pages_valid(int64_t pages)
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{
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return pages >= MIN_SAMPLE_PAGE_COUNT &&
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pages <= MAX_SAMPLE_PAGE_COUNT;
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}
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2020-09-16 08:21:57 +02:00
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static int dirtyrate_set_state(int *state, int old_state, int new_state)
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{
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assert(new_state < DIRTY_RATE_STATUS__MAX);
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2020-09-16 08:22:07 +02:00
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trace_dirtyrate_set_state(DirtyRateStatus_str(new_state));
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2020-09-16 08:21:57 +02:00
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if (qatomic_cmpxchg(state, old_state, new_state) == old_state) {
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return 0;
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} else {
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return -1;
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}
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}
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2020-09-16 08:22:06 +02:00
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static struct DirtyRateInfo *query_dirty_rate_info(void)
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{
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2021-06-29 18:01:23 +02:00
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int i;
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2020-09-16 08:22:06 +02:00
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int64_t dirty_rate = DirtyStat.dirty_rate;
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2022-03-15 15:41:56 +01:00
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struct DirtyRateInfo *info = g_new0(DirtyRateInfo, 1);
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2021-06-29 18:01:23 +02:00
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DirtyRateVcpuList *head = NULL, **tail = &head;
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2020-09-16 08:22:06 +02:00
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info->status = CalculatingState;
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info->start_time = DirtyStat.start_time;
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info->calc_time = DirtyStat.calc_time;
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2021-06-07 03:11:34 +02:00
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info->sample_pages = DirtyStat.sample_pages;
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2021-06-29 18:01:23 +02:00
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info->mode = dirtyrate_mode;
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if (qatomic_read(&CalculatingState) == DIRTY_RATE_STATUS_MEASURED) {
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info->has_dirty_rate = true;
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info->dirty_rate = dirty_rate;
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if (dirtyrate_mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) {
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/*
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* set sample_pages with 0 to indicate page sampling
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* isn't enabled
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**/
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info->sample_pages = 0;
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info->has_vcpu_dirty_rate = true;
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for (i = 0; i < DirtyStat.dirty_ring.nvcpu; i++) {
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2022-03-15 15:41:56 +01:00
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DirtyRateVcpu *rate = g_new0(DirtyRateVcpu, 1);
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2021-06-29 18:01:23 +02:00
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rate->id = DirtyStat.dirty_ring.rates[i].id;
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rate->dirty_rate = DirtyStat.dirty_ring.rates[i].dirty_rate;
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QAPI_LIST_APPEND(tail, rate);
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}
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info->vcpu_dirty_rate = head;
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}
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2021-07-20 17:19:17 +02:00
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if (dirtyrate_mode == DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP) {
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info->sample_pages = 0;
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}
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2021-06-29 18:01:23 +02:00
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}
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2020-09-16 08:22:06 +02:00
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2020-09-16 08:22:07 +02:00
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trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState));
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2020-09-16 08:22:06 +02:00
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return info;
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}
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2021-06-29 18:01:20 +02:00
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static void init_dirtyrate_stat(int64_t start_time,
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struct DirtyRateConfig config)
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2020-09-16 08:21:59 +02:00
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{
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DirtyStat.dirty_rate = -1;
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2020-09-29 05:42:17 +02:00
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DirtyStat.start_time = start_time;
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2021-06-29 18:01:20 +02:00
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DirtyStat.calc_time = config.sample_period_seconds;
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DirtyStat.sample_pages = config.sample_pages_per_gigabytes;
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switch (config.mode) {
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case DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING:
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DirtyStat.page_sampling.total_dirty_samples = 0;
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DirtyStat.page_sampling.total_sample_count = 0;
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DirtyStat.page_sampling.total_block_mem_MB = 0;
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break;
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case DIRTY_RATE_MEASURE_MODE_DIRTY_RING:
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DirtyStat.dirty_ring.nvcpu = -1;
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DirtyStat.dirty_ring.rates = NULL;
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break;
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default:
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break;
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}
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2020-09-16 08:21:59 +02:00
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}
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2021-06-29 18:01:23 +02:00
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static void cleanup_dirtyrate_stat(struct DirtyRateConfig config)
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{
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/* last calc-dirty-rate qmp use dirty ring mode */
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if (dirtyrate_mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) {
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free(DirtyStat.dirty_ring.rates);
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DirtyStat.dirty_ring.rates = NULL;
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}
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}
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2020-09-16 08:21:59 +02:00
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static void update_dirtyrate_stat(struct RamblockDirtyInfo *info)
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{
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2021-06-29 18:01:20 +02:00
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DirtyStat.page_sampling.total_dirty_samples += info->sample_dirty_count;
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DirtyStat.page_sampling.total_sample_count += info->sample_pages_count;
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2020-09-16 08:21:59 +02:00
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/* size of total pages in MB */
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2021-06-29 18:01:20 +02:00
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DirtyStat.page_sampling.total_block_mem_MB += (info->ramblock_pages *
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TARGET_PAGE_SIZE) >> 20;
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2020-09-16 08:21:59 +02:00
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}
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static void update_dirtyrate(uint64_t msec)
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{
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uint64_t dirtyrate;
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2021-06-29 18:01:20 +02:00
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uint64_t total_dirty_samples = DirtyStat.page_sampling.total_dirty_samples;
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uint64_t total_sample_count = DirtyStat.page_sampling.total_sample_count;
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uint64_t total_block_mem_MB = DirtyStat.page_sampling.total_block_mem_MB;
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2020-09-16 08:21:59 +02:00
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dirtyrate = total_dirty_samples * total_block_mem_MB *
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1000 / (total_sample_count * msec);
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DirtyStat.dirty_rate = dirtyrate;
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}
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2020-09-16 08:21:57 +02:00
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2020-09-16 08:22:01 +02:00
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/*
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* get hash result for the sampled memory with length of TARGET_PAGE_SIZE
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* in ramblock, which starts from ramblock base address.
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*/
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static uint32_t get_ramblock_vfn_hash(struct RamblockDirtyInfo *info,
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uint64_t vfn)
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{
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uint32_t crc;
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crc = crc32(0, (info->ramblock_addr +
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vfn * TARGET_PAGE_SIZE), TARGET_PAGE_SIZE);
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2020-09-16 08:22:07 +02:00
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trace_get_ramblock_vfn_hash(info->idstr, vfn, crc);
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2020-09-16 08:22:01 +02:00
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return crc;
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}
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static bool save_ramblock_hash(struct RamblockDirtyInfo *info)
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{
|
|
|
|
unsigned int sample_pages_count;
|
|
|
|
int i;
|
|
|
|
GRand *rand;
|
|
|
|
|
|
|
|
sample_pages_count = info->sample_pages_count;
|
|
|
|
|
|
|
|
/* ramblock size less than one page, return success to skip this ramblock */
|
|
|
|
if (unlikely(info->ramblock_pages == 0 || sample_pages_count == 0)) {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
info->hash_result = g_try_malloc0_n(sample_pages_count,
|
|
|
|
sizeof(uint32_t));
|
|
|
|
if (!info->hash_result) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
info->sample_page_vfn = g_try_malloc0_n(sample_pages_count,
|
|
|
|
sizeof(uint64_t));
|
|
|
|
if (!info->sample_page_vfn) {
|
|
|
|
g_free(info->hash_result);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
rand = g_rand_new();
|
|
|
|
for (i = 0; i < sample_pages_count; i++) {
|
|
|
|
info->sample_page_vfn[i] = g_rand_int_range(rand, 0,
|
|
|
|
info->ramblock_pages - 1);
|
|
|
|
info->hash_result[i] = get_ramblock_vfn_hash(info,
|
|
|
|
info->sample_page_vfn[i]);
|
|
|
|
}
|
|
|
|
g_rand_free(rand);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void get_ramblock_dirty_info(RAMBlock *block,
|
|
|
|
struct RamblockDirtyInfo *info,
|
|
|
|
struct DirtyRateConfig *config)
|
|
|
|
{
|
|
|
|
uint64_t sample_pages_per_gigabytes = config->sample_pages_per_gigabytes;
|
|
|
|
|
|
|
|
/* Right shift 30 bits to calc ramblock size in GB */
|
|
|
|
info->sample_pages_count = (qemu_ram_get_used_length(block) *
|
|
|
|
sample_pages_per_gigabytes) >> 30;
|
|
|
|
/* Right shift TARGET_PAGE_BITS to calc page count */
|
|
|
|
info->ramblock_pages = qemu_ram_get_used_length(block) >>
|
|
|
|
TARGET_PAGE_BITS;
|
|
|
|
info->ramblock_addr = qemu_ram_get_host_addr(block);
|
|
|
|
strcpy(info->idstr, qemu_ram_get_idstr(block));
|
|
|
|
}
|
|
|
|
|
2020-09-16 08:22:05 +02:00
|
|
|
static void free_ramblock_dirty_info(struct RamblockDirtyInfo *infos, int count)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!infos) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
g_free(infos[i].sample_page_vfn);
|
|
|
|
g_free(infos[i].hash_result);
|
|
|
|
}
|
|
|
|
g_free(infos);
|
|
|
|
}
|
|
|
|
|
2020-09-16 08:22:03 +02:00
|
|
|
static bool skip_sample_ramblock(RAMBlock *block)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Sample only blocks larger than MIN_RAMBLOCK_SIZE.
|
|
|
|
*/
|
|
|
|
if (qemu_ram_get_used_length(block) < (MIN_RAMBLOCK_SIZE << 10)) {
|
2020-09-16 08:22:07 +02:00
|
|
|
trace_skip_sample_ramblock(block->idstr,
|
|
|
|
qemu_ram_get_used_length(block));
|
2020-09-16 08:22:03 +02:00
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2020-09-16 08:22:01 +02:00
|
|
|
static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo,
|
|
|
|
struct DirtyRateConfig config,
|
|
|
|
int *block_count)
|
|
|
|
{
|
|
|
|
struct RamblockDirtyInfo *info = NULL;
|
|
|
|
struct RamblockDirtyInfo *dinfo = NULL;
|
|
|
|
RAMBlock *block = NULL;
|
|
|
|
int total_count = 0;
|
|
|
|
int index = 0;
|
|
|
|
bool ret = false;
|
|
|
|
|
|
|
|
RAMBLOCK_FOREACH_MIGRATABLE(block) {
|
2020-09-16 08:22:03 +02:00
|
|
|
if (skip_sample_ramblock(block)) {
|
|
|
|
continue;
|
|
|
|
}
|
2020-09-16 08:22:01 +02:00
|
|
|
total_count++;
|
|
|
|
}
|
|
|
|
|
|
|
|
dinfo = g_try_malloc0_n(total_count, sizeof(struct RamblockDirtyInfo));
|
|
|
|
if (dinfo == NULL) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
RAMBLOCK_FOREACH_MIGRATABLE(block) {
|
2020-09-16 08:22:03 +02:00
|
|
|
if (skip_sample_ramblock(block)) {
|
|
|
|
continue;
|
|
|
|
}
|
2020-09-16 08:22:01 +02:00
|
|
|
if (index >= total_count) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
info = &dinfo[index];
|
|
|
|
get_ramblock_dirty_info(block, info, &config);
|
|
|
|
if (!save_ramblock_hash(info)) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
index++;
|
|
|
|
}
|
|
|
|
ret = true;
|
|
|
|
|
|
|
|
out:
|
|
|
|
*block_count = index;
|
|
|
|
*block_dinfo = dinfo;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-09-16 08:22:02 +02:00
|
|
|
static void calc_page_dirty_rate(struct RamblockDirtyInfo *info)
|
|
|
|
{
|
|
|
|
uint32_t crc;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < info->sample_pages_count; i++) {
|
|
|
|
crc = get_ramblock_vfn_hash(info, info->sample_page_vfn[i]);
|
|
|
|
if (crc != info->hash_result[i]) {
|
2020-09-16 08:22:07 +02:00
|
|
|
trace_calc_page_dirty_rate(info->idstr, crc, info->hash_result[i]);
|
2020-09-16 08:22:02 +02:00
|
|
|
info->sample_dirty_count++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct RamblockDirtyInfo *
|
|
|
|
find_block_matched(RAMBlock *block, int count,
|
|
|
|
struct RamblockDirtyInfo *infos)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i == count) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) ||
|
|
|
|
infos[i].ramblock_pages !=
|
|
|
|
(qemu_ram_get_used_length(block) >> TARGET_PAGE_BITS)) {
|
2020-09-16 08:22:07 +02:00
|
|
|
trace_find_page_matched(block->idstr);
|
2020-09-16 08:22:02 +02:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2022-11-22 14:49:16 +01:00
|
|
|
return &infos[i];
|
2020-09-16 08:22:02 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static bool compare_page_hash_info(struct RamblockDirtyInfo *info,
|
|
|
|
int block_count)
|
|
|
|
{
|
|
|
|
struct RamblockDirtyInfo *block_dinfo = NULL;
|
|
|
|
RAMBlock *block = NULL;
|
|
|
|
|
|
|
|
RAMBLOCK_FOREACH_MIGRATABLE(block) {
|
2020-09-16 08:22:03 +02:00
|
|
|
if (skip_sample_ramblock(block)) {
|
|
|
|
continue;
|
|
|
|
}
|
2020-09-16 08:22:02 +02:00
|
|
|
block_dinfo = find_block_matched(block, block_count, info);
|
|
|
|
if (block_dinfo == NULL) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
calc_page_dirty_rate(block_dinfo);
|
|
|
|
update_dirtyrate_stat(block_dinfo);
|
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:20 +02:00
|
|
|
if (DirtyStat.page_sampling.total_sample_count == 0) {
|
2020-09-16 08:22:02 +02:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2021-07-20 17:19:17 +02:00
|
|
|
static inline void record_dirtypages_bitmap(DirtyPageRecord *dirty_pages,
|
|
|
|
bool start)
|
|
|
|
{
|
|
|
|
if (start) {
|
|
|
|
dirty_pages->start_pages = total_dirty_pages;
|
|
|
|
} else {
|
|
|
|
dirty_pages->end_pages = total_dirty_pages;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void dirtyrate_manual_reset_protect(void)
|
|
|
|
{
|
|
|
|
RAMBlock *block = NULL;
|
|
|
|
|
|
|
|
WITH_RCU_READ_LOCK_GUARD() {
|
|
|
|
RAMBLOCK_FOREACH_MIGRATABLE(block) {
|
|
|
|
memory_region_clear_dirty_bitmap(block->mr, 0,
|
|
|
|
block->used_length);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void calculate_dirtyrate_dirty_bitmap(struct DirtyRateConfig config)
|
|
|
|
{
|
|
|
|
int64_t msec = 0;
|
|
|
|
int64_t start_time;
|
|
|
|
DirtyPageRecord dirty_pages;
|
|
|
|
|
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
memory_global_dirty_log_start(GLOBAL_DIRTY_DIRTY_RATE);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 1'round of log sync may return all 1 bits with
|
|
|
|
* KVM_DIRTY_LOG_INITIALLY_SET enable
|
|
|
|
* skip it unconditionally and start dirty tracking
|
|
|
|
* from 2'round of log sync
|
|
|
|
*/
|
|
|
|
memory_global_dirty_log_sync();
|
|
|
|
|
|
|
|
/*
|
|
|
|
* reset page protect manually and unconditionally.
|
|
|
|
* this make sure kvm dirty log be cleared if
|
|
|
|
* KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE cap is enabled.
|
|
|
|
*/
|
|
|
|
dirtyrate_manual_reset_protect();
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
|
|
|
|
record_dirtypages_bitmap(&dirty_pages, true);
|
|
|
|
|
|
|
|
start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
|
|
|
|
DirtyStat.start_time = start_time / 1000;
|
|
|
|
|
|
|
|
msec = config.sample_period_seconds * 1000;
|
2022-06-25 19:38:32 +02:00
|
|
|
msec = dirty_stat_wait(msec, start_time);
|
2021-07-20 17:19:17 +02:00
|
|
|
DirtyStat.calc_time = msec / 1000;
|
|
|
|
|
|
|
|
/*
|
2022-06-25 19:38:32 +02:00
|
|
|
* do two things.
|
2021-07-20 17:19:17 +02:00
|
|
|
* 1. fetch dirty bitmap from kvm
|
|
|
|
* 2. stop dirty tracking
|
|
|
|
*/
|
2022-06-25 19:38:32 +02:00
|
|
|
global_dirty_log_sync(GLOBAL_DIRTY_DIRTY_RATE, true);
|
2021-07-20 17:19:17 +02:00
|
|
|
|
|
|
|
record_dirtypages_bitmap(&dirty_pages, false);
|
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
DirtyStat.dirty_rate = do_calculate_dirtyrate(dirty_pages, msec);
|
2021-07-20 17:19:17 +02:00
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
static void calculate_dirtyrate_dirty_ring(struct DirtyRateConfig config)
|
|
|
|
{
|
2022-06-25 19:38:32 +02:00
|
|
|
int64_t duration;
|
2021-06-29 18:01:23 +02:00
|
|
|
uint64_t dirtyrate = 0;
|
|
|
|
uint64_t dirtyrate_sum = 0;
|
|
|
|
int i = 0;
|
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
/* start log sync */
|
|
|
|
global_dirty_log_change(GLOBAL_DIRTY_DIRTY_RATE, true);
|
2021-06-29 18:01:23 +02:00
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
DirtyStat.start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000;
|
2021-06-29 18:01:23 +02:00
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
/* calculate vcpu dirtyrate */
|
|
|
|
duration = vcpu_calculate_dirtyrate(config.sample_period_seconds * 1000,
|
|
|
|
&DirtyStat.dirty_ring,
|
|
|
|
GLOBAL_DIRTY_DIRTY_RATE,
|
|
|
|
true);
|
2021-06-29 18:01:23 +02:00
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
DirtyStat.calc_time = duration / 1000;
|
2021-06-29 18:01:23 +02:00
|
|
|
|
2022-06-25 19:38:32 +02:00
|
|
|
/* calculate vm dirtyrate */
|
2021-06-29 18:01:23 +02:00
|
|
|
for (i = 0; i < DirtyStat.dirty_ring.nvcpu; i++) {
|
2022-06-25 19:38:32 +02:00
|
|
|
dirtyrate = DirtyStat.dirty_ring.rates[i].dirty_rate;
|
2021-06-29 18:01:23 +02:00
|
|
|
DirtyStat.dirty_ring.rates[i].dirty_rate = dirtyrate;
|
|
|
|
dirtyrate_sum += dirtyrate;
|
|
|
|
}
|
|
|
|
|
|
|
|
DirtyStat.dirty_rate = dirtyrate_sum;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void calculate_dirtyrate_sample_vm(struct DirtyRateConfig config)
|
2020-09-16 08:21:56 +02:00
|
|
|
{
|
2020-09-16 08:22:05 +02:00
|
|
|
struct RamblockDirtyInfo *block_dinfo = NULL;
|
|
|
|
int block_count = 0;
|
|
|
|
int64_t msec = 0;
|
|
|
|
int64_t initial_time;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
|
|
|
|
if (!record_ramblock_hash_info(&block_dinfo, config, &block_count)) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
msec = config.sample_period_seconds * 1000;
|
2022-06-25 19:38:32 +02:00
|
|
|
msec = dirty_stat_wait(msec, initial_time);
|
2020-09-16 08:22:06 +02:00
|
|
|
DirtyStat.start_time = initial_time / 1000;
|
|
|
|
DirtyStat.calc_time = msec / 1000;
|
2020-09-16 08:22:05 +02:00
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
if (!compare_page_hash_info(block_dinfo, block_count)) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
update_dirtyrate(msec);
|
|
|
|
|
|
|
|
out:
|
|
|
|
rcu_read_unlock();
|
|
|
|
free_ramblock_dirty_info(block_dinfo, block_count);
|
2020-09-16 08:21:56 +02:00
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
static void calculate_dirtyrate(struct DirtyRateConfig config)
|
|
|
|
{
|
2021-07-20 17:19:17 +02:00
|
|
|
if (config.mode == DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP) {
|
|
|
|
calculate_dirtyrate_dirty_bitmap(config);
|
|
|
|
} else if (config.mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) {
|
2021-06-29 18:01:23 +02:00
|
|
|
calculate_dirtyrate_dirty_ring(config);
|
|
|
|
} else {
|
|
|
|
calculate_dirtyrate_sample_vm(config);
|
|
|
|
}
|
|
|
|
|
|
|
|
trace_dirtyrate_calculate(DirtyStat.dirty_rate);
|
|
|
|
}
|
|
|
|
|
2020-09-16 08:21:56 +02:00
|
|
|
void *get_dirtyrate_thread(void *arg)
|
|
|
|
{
|
|
|
|
struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg;
|
2020-09-16 08:21:57 +02:00
|
|
|
int ret;
|
2021-06-29 18:01:21 +02:00
|
|
|
rcu_register_thread();
|
2020-09-16 08:21:57 +02:00
|
|
|
|
|
|
|
ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED,
|
|
|
|
DIRTY_RATE_STATUS_MEASURING);
|
|
|
|
if (ret == -1) {
|
|
|
|
error_report("change dirtyrate state failed.");
|
|
|
|
return NULL;
|
|
|
|
}
|
2020-09-16 08:21:56 +02:00
|
|
|
|
|
|
|
calculate_dirtyrate(config);
|
|
|
|
|
2020-09-16 08:21:57 +02:00
|
|
|
ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_MEASURING,
|
|
|
|
DIRTY_RATE_STATUS_MEASURED);
|
|
|
|
if (ret == -1) {
|
|
|
|
error_report("change dirtyrate state failed.");
|
|
|
|
}
|
2021-06-29 18:01:21 +02:00
|
|
|
|
|
|
|
rcu_unregister_thread();
|
2020-09-16 08:21:56 +02:00
|
|
|
return NULL;
|
|
|
|
}
|
2020-09-16 08:22:06 +02:00
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
void qmp_calc_dirty_rate(int64_t calc_time,
|
|
|
|
bool has_sample_pages,
|
|
|
|
int64_t sample_pages,
|
|
|
|
bool has_mode,
|
|
|
|
DirtyRateMeasureMode mode,
|
|
|
|
Error **errp)
|
2020-09-16 08:22:06 +02:00
|
|
|
{
|
|
|
|
static struct DirtyRateConfig config;
|
|
|
|
QemuThread thread;
|
|
|
|
int ret;
|
2021-06-29 18:01:22 +02:00
|
|
|
int64_t start_time;
|
2020-09-16 08:22:06 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* If the dirty rate is already being measured, don't attempt to start.
|
|
|
|
*/
|
|
|
|
if (qatomic_read(&CalculatingState) == DIRTY_RATE_STATUS_MEASURING) {
|
|
|
|
error_setg(errp, "the dirty rate is already being measured.");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!is_sample_period_valid(calc_time)) {
|
|
|
|
error_setg(errp, "calc-time is out of range[%d, %d].",
|
|
|
|
MIN_FETCH_DIRTYRATE_TIME_SEC,
|
|
|
|
MAX_FETCH_DIRTYRATE_TIME_SEC);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
if (!has_mode) {
|
|
|
|
mode = DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING;
|
|
|
|
}
|
|
|
|
|
2022-11-29 05:04:04 +01:00
|
|
|
if (has_sample_pages && mode != DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING) {
|
|
|
|
error_setg(errp, "sample-pages is used only in page-sampling mode");
|
2021-06-29 18:01:23 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-06-07 03:11:34 +02:00
|
|
|
if (has_sample_pages) {
|
|
|
|
if (!is_sample_pages_valid(sample_pages)) {
|
|
|
|
error_setg(errp, "sample-pages is out of range[%d, %d].",
|
|
|
|
MIN_SAMPLE_PAGE_COUNT,
|
|
|
|
MAX_SAMPLE_PAGE_COUNT);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
sample_pages = DIRTYRATE_DEFAULT_SAMPLE_PAGES;
|
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
/*
|
|
|
|
* dirty ring mode only works when kvm dirty ring is enabled.
|
2021-07-20 17:19:17 +02:00
|
|
|
* on the contrary, dirty bitmap mode is not.
|
2021-06-29 18:01:23 +02:00
|
|
|
*/
|
2021-07-20 17:19:17 +02:00
|
|
|
if (((mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) &&
|
|
|
|
!kvm_dirty_ring_enabled()) ||
|
|
|
|
((mode == DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP) &&
|
|
|
|
kvm_dirty_ring_enabled())) {
|
|
|
|
error_setg(errp, "mode %s is not enabled, use other method instead.",
|
|
|
|
DirtyRateMeasureMode_str(mode));
|
|
|
|
return;
|
2021-06-29 18:01:23 +02:00
|
|
|
}
|
|
|
|
|
2020-09-16 08:22:06 +02:00
|
|
|
/*
|
|
|
|
* Init calculation state as unstarted.
|
|
|
|
*/
|
|
|
|
ret = dirtyrate_set_state(&CalculatingState, CalculatingState,
|
|
|
|
DIRTY_RATE_STATUS_UNSTARTED);
|
|
|
|
if (ret == -1) {
|
|
|
|
error_setg(errp, "init dirty rate calculation state failed.");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
config.sample_period_seconds = calc_time;
|
2021-06-07 03:11:34 +02:00
|
|
|
config.sample_pages_per_gigabytes = sample_pages;
|
2021-06-29 18:01:23 +02:00
|
|
|
config.mode = mode;
|
|
|
|
|
|
|
|
cleanup_dirtyrate_stat(config);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* update dirty rate mode so that we can figure out what mode has
|
|
|
|
* been used in last calculation
|
|
|
|
**/
|
|
|
|
dirtyrate_mode = mode;
|
2021-06-29 18:01:22 +02:00
|
|
|
|
|
|
|
start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000;
|
|
|
|
init_dirtyrate_stat(start_time, config);
|
|
|
|
|
2020-09-16 08:22:06 +02:00
|
|
|
qemu_thread_create(&thread, "get_dirtyrate", get_dirtyrate_thread,
|
|
|
|
(void *)&config, QEMU_THREAD_DETACHED);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct DirtyRateInfo *qmp_query_dirty_rate(Error **errp)
|
|
|
|
{
|
|
|
|
return query_dirty_rate_info();
|
|
|
|
}
|
2021-06-07 03:11:57 +02:00
|
|
|
|
|
|
|
void hmp_info_dirty_rate(Monitor *mon, const QDict *qdict)
|
|
|
|
{
|
|
|
|
DirtyRateInfo *info = query_dirty_rate_info();
|
|
|
|
|
|
|
|
monitor_printf(mon, "Status: %s\n",
|
|
|
|
DirtyRateStatus_str(info->status));
|
|
|
|
monitor_printf(mon, "Start Time: %"PRIi64" (ms)\n",
|
|
|
|
info->start_time);
|
2022-11-29 05:04:04 +01:00
|
|
|
if (info->mode == DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING) {
|
|
|
|
monitor_printf(mon, "Sample Pages: %"PRIu64" (per GB)\n",
|
|
|
|
info->sample_pages);
|
|
|
|
}
|
2021-06-07 03:11:57 +02:00
|
|
|
monitor_printf(mon, "Period: %"PRIi64" (sec)\n",
|
|
|
|
info->calc_time);
|
2021-06-29 18:01:23 +02:00
|
|
|
monitor_printf(mon, "Mode: %s\n",
|
|
|
|
DirtyRateMeasureMode_str(info->mode));
|
2021-06-07 03:11:57 +02:00
|
|
|
monitor_printf(mon, "Dirty rate: ");
|
|
|
|
if (info->has_dirty_rate) {
|
|
|
|
monitor_printf(mon, "%"PRIi64" (MB/s)\n", info->dirty_rate);
|
2021-06-29 18:01:23 +02:00
|
|
|
if (info->has_vcpu_dirty_rate) {
|
|
|
|
DirtyRateVcpuList *rate, *head = info->vcpu_dirty_rate;
|
|
|
|
for (rate = head; rate != NULL; rate = rate->next) {
|
|
|
|
monitor_printf(mon, "vcpu[%"PRIi64"], Dirty rate: %"PRIi64
|
|
|
|
" (MB/s)\n", rate->value->id,
|
|
|
|
rate->value->dirty_rate);
|
|
|
|
}
|
|
|
|
}
|
2021-06-07 03:11:57 +02:00
|
|
|
} else {
|
|
|
|
monitor_printf(mon, "(not ready)\n");
|
|
|
|
}
|
2021-06-29 18:01:23 +02:00
|
|
|
|
|
|
|
qapi_free_DirtyRateVcpuList(info->vcpu_dirty_rate);
|
2021-06-07 03:11:57 +02:00
|
|
|
g_free(info);
|
|
|
|
}
|
|
|
|
|
|
|
|
void hmp_calc_dirty_rate(Monitor *mon, const QDict *qdict)
|
|
|
|
{
|
|
|
|
int64_t sec = qdict_get_try_int(qdict, "second", 0);
|
|
|
|
int64_t sample_pages = qdict_get_try_int(qdict, "sample_pages_per_GB", -1);
|
|
|
|
bool has_sample_pages = (sample_pages != -1);
|
2021-06-29 18:01:23 +02:00
|
|
|
bool dirty_ring = qdict_get_try_bool(qdict, "dirty_ring", false);
|
2021-07-20 17:19:17 +02:00
|
|
|
bool dirty_bitmap = qdict_get_try_bool(qdict, "dirty_bitmap", false);
|
|
|
|
DirtyRateMeasureMode mode = DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING;
|
2021-06-07 03:11:57 +02:00
|
|
|
Error *err = NULL;
|
|
|
|
|
|
|
|
if (!sec) {
|
|
|
|
monitor_printf(mon, "Incorrect period length specified!\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2021-07-20 17:19:17 +02:00
|
|
|
if (dirty_ring && dirty_bitmap) {
|
|
|
|
monitor_printf(mon, "Either dirty ring or dirty bitmap "
|
|
|
|
"can be specified!\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dirty_bitmap) {
|
|
|
|
mode = DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP;
|
|
|
|
} else if (dirty_ring) {
|
|
|
|
mode = DIRTY_RATE_MEASURE_MODE_DIRTY_RING;
|
|
|
|
}
|
|
|
|
|
2021-06-29 18:01:23 +02:00
|
|
|
qmp_calc_dirty_rate(sec, has_sample_pages, sample_pages, true,
|
|
|
|
mode, &err);
|
2021-06-07 03:11:57 +02:00
|
|
|
if (err) {
|
|
|
|
hmp_handle_error(mon, err);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
monitor_printf(mon, "Starting dirty rate measurement with period %"PRIi64
|
|
|
|
" seconds\n", sec);
|
|
|
|
monitor_printf(mon, "[Please use 'info dirty_rate' to check results]\n");
|
|
|
|
}
|