@@ -1738,9 +1738,10 @@ ERST
{
.name = "calc_dirty_rate",
- .args_type = "dirty_ring:-r,second:l,sample_pages_per_GB:l?",
- .params = "[-r] second [sample_pages_per_GB]",
- .help = "start a round of guest dirty rate measurement (using -d to"
- "\n\t\t\t specify dirty ring as the method of calculation)",
+ .args_type = "dirty_ring:-r,dirty_bitmap:-b,second:l,sample_pages_per_GB:l?",
+ .params = "[-r] [-b] second [sample_pages_per_GB]",
+ .help = "start a round of guest dirty rate measurement (using -r to"
+ "\n\t\t\t specify dirty ring as the method of calculation and"
+ "\n\t\t\t -b to specify dirty bitmap as method of calculation)",
.cmd = hmp_calc_dirty_rate,
},
@@ -15,6 +15,7 @@
#include "qapi/error.h"
#include "cpu.h"
#include "exec/ramblock.h"
+#include "exec/ram_addr.h"
#include "qemu/rcu_queue.h"
#include "qemu/main-loop.h"
#include "qapi/qapi-commands-migration.h"
@@ -111,6 +112,10 @@ static struct DirtyRateInfo *query_dirty_rate_info(void)
}
info->vcpu_dirty_rate = head;
}
+
+ if (dirtyrate_mode == DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP) {
+ info->sample_pages = 0;
+ }
}
trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState));
@@ -408,6 +413,99 @@ static void dirtyrate_global_dirty_log_stop(void)
qemu_mutex_unlock_iothread();
}
+static inline void dirtyrate_increasedpages_clear(void)
+{
+ DirtyRateIncreasedPages = 0;
+}
+
+static inline uint64_t dirtyrate_increasedpages_reap(void)
+{
+ RAMBlock *block = NULL;
+
+ WITH_RCU_READ_LOCK_GUARD() {
+ RAMBLOCK_FOREACH_MIGRATABLE(block) {
+ cpu_physical_memory_sync_dirty_bitmap(block, 0, block->used_length);
+ }
+ }
+
+ return DirtyRateIncreasedPages;
+}
+
+static inline void dirtyrate_manual_reset_protect(void)
+{
+ RAMBlock *block = NULL;
+
+ WITH_RCU_READ_LOCK_GUARD() {
+ RAMBLOCK_FOREACH_MIGRATABLE(block) {
+ cpu_physical_memory_dirtyrate_reset_protect(block);
+ }
+ }
+}
+
+static void do_calculate_dirtyrate_bitmap(void)
+{
+ uint64_t memory_size_MB;
+ int64_t time_s;
+ uint64_t increased_dirty_pages = 0;
+ uint64_t dirtyrate = 0;
+
+ increased_dirty_pages = dirtyrate_increasedpages_reap();
+
+ memory_size_MB = (increased_dirty_pages * TARGET_PAGE_SIZE) >> 20;
+ time_s = DirtyStat.calc_time;
+
+ dirtyrate = memory_size_MB / time_s;
+ DirtyStat.dirty_rate = dirtyrate;
+
+ trace_dirtyrate_do_calculate_bitmap(increased_dirty_pages,
+ time_s, dirtyrate);
+}
+
+static void calculate_dirtyrate_dirty_bitmap(struct DirtyRateConfig config)
+{
+ int64_t msec = 0;
+ int64_t start_time;
+ uint64_t protect_flags = kvm_get_manual_dirty_log_protect();
+
+ dirtyrate_global_dirty_log_start();
+
+ /*
+ * 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
+ * start dirty tracking from now on
+ */
+ if (protect_flags & KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE) {
+ dirtyrate_manual_reset_protect();
+ }
+
+ dirtyrate_increasedpages_clear();
+
+ start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+ DirtyStat.start_time = start_time / 1000;
+
+ msec = config.sample_period_seconds * 1000;
+ msec = set_sample_page_period(msec, start_time);
+ DirtyStat.calc_time = msec / 1000;
+
+ /* fetch dirty bitmap from kvm */
+ memory_global_dirty_log_sync();
+
+ do_calculate_dirtyrate_bitmap();
+
+ if (protect_flags & KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE) {
+ dirtyrate_manual_reset_protect();
+ }
+
+ dirtyrate_global_dirty_log_stop();
+}
+
static int64_t do_calculate_dirtyrate_vcpu(DirtyPageRecord dirty_pages)
{
uint64_t memory_size_MB;
@@ -506,7 +604,9 @@ out:
static void calculate_dirtyrate(struct DirtyRateConfig config)
{
- if (config.mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) {
+ if (config.mode == DIRTY_RATE_MEASURE_MODE_DIRTY_BITMAP) {
+ calculate_dirtyrate_dirty_bitmap(config);
+ } else if (config.mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) {
calculate_dirtyrate_dirty_ring(config);
} else {
calculate_dirtyrate_sample_vm(config);
@@ -589,12 +689,15 @@ void qmp_calc_dirty_rate(int64_t calc_time,
/*
* dirty ring mode only works when kvm dirty ring is enabled.
+ * on the contrary, dirty bitmap mode is not.
*/
- if ((mode == DIRTY_RATE_MEASURE_MODE_DIRTY_RING) &&
- !kvm_dirty_ring_enabled()) {
- error_setg(errp, "dirty ring is disabled, use sample-pages method "
- "or remeasure later.");
- return;
+ 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;
}
/*
@@ -670,9 +773,8 @@ void hmp_calc_dirty_rate(Monitor *mon, const QDict *qdict)
int64_t sample_pages = qdict_get_try_int(qdict, "sample_pages_per_GB", -1);
bool has_sample_pages = (sample_pages != -1);
bool dirty_ring = qdict_get_try_bool(qdict, "dirty_ring", false);
- DirtyRateMeasureMode mode =
- (dirty_ring ? DIRTY_RATE_MEASURE_MODE_DIRTY_RING :
- DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING);
+ bool dirty_bitmap = qdict_get_try_bool(qdict, "dirty_bitmap", false);
+ DirtyRateMeasureMode mode = DIRTY_RATE_MEASURE_MODE_PAGE_SAMPLING;
Error *err = NULL;
if (!sec) {
@@ -680,6 +782,20 @@ void hmp_calc_dirty_rate(Monitor *mon, const QDict *qdict)
return;
}
+ 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;
+ }
+
+ if (dirty_ring) {
+ mode = DIRTY_RATE_MEASURE_MODE_DIRTY_RING;
+ }
+
qmp_calc_dirty_rate(sec, has_sample_pages, sample_pages, true,
mode, &err);
if (err) {
@@ -333,6 +333,7 @@ skip_sample_ramblock(const char *idstr, uint64_t ramblock_size) "ramblock name:
find_page_matched(const char *idstr) "ramblock %s addr or size changed"
dirtyrate_calculate(int64_t dirtyrate) "dirty rate: %" PRIi64 " MB/s"
dirtyrate_do_calculate_vcpu(int idx, uint64_t rate) "vcpu[%d]: %"PRIu64 " MB/s"
+dirtyrate_do_calculate_bitmap(uint64_t pages, int64_t time, uint64_t rate) "%"PRIu64 " pages has increased in %"PRIi64 " s, rate %"PRIu64 "MB/s"
# block.c
migration_block_init_shared(const char *blk_device_name) "Start migration for %s with shared base image"
@@ -1747,13 +1747,15 @@
#
# @page-sampling: calculate dirtyrate by sampling pages.
#
-# @dirty-ring: calculate dirtyrate by via dirty ring.
+# @dirty-ring: calculate dirtyrate by dirty ring.
+#
+# @dirty-bitmap: calculate dirtyrate by dirty bitmap.
#
# Since: 6.1
#
##
{ 'enum': 'DirtyRateMeasureMode',
- 'data': ['page-sampling', 'dirty-ring'] }
+ 'data': ['page-sampling', 'dirty-ring', 'dirty-bitmap'] }
##
# @DirtyRateInfo: