return true;
}
+static bool is_sample_pages_valid(int64_t pages)
+{
+ return pages >= MIN_SAMPLE_PAGE_COUNT &&
+ pages <= MAX_SAMPLE_PAGE_COUNT;
+}
+
static int dirtyrate_set_state(int *state, int old_state, int new_state)
{
assert(new_state < DIRTY_RATE_STATUS__MAX);
info->status = CalculatingState;
info->start_time = DirtyStat.start_time;
info->calc_time = DirtyStat.calc_time;
+ info->sample_pages = DirtyStat.sample_pages;
trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState));
return info;
}
-static void init_dirtyrate_stat(int64_t start_time, int64_t calc_time)
+static void init_dirtyrate_stat(int64_t start_time, int64_t calc_time,
+ uint64_t sample_pages)
{
DirtyStat.total_dirty_samples = 0;
DirtyStat.total_sample_count = 0;
DirtyStat.dirty_rate = -1;
DirtyStat.start_time = start_time;
DirtyStat.calc_time = calc_time;
+ DirtyStat.sample_pages = sample_pages;
}
static void update_dirtyrate_stat(struct RamblockDirtyInfo *info)
int ret;
int64_t start_time;
int64_t calc_time;
+ uint64_t sample_pages;
ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED,
DIRTY_RATE_STATUS_MEASURING);
start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000;
calc_time = config.sample_period_seconds;
- init_dirtyrate_stat(start_time, calc_time);
+ sample_pages = config.sample_pages_per_gigabytes;
+ init_dirtyrate_stat(start_time, calc_time, sample_pages);
calculate_dirtyrate(config);
return NULL;
}
-void qmp_calc_dirty_rate(int64_t calc_time, Error **errp)
+void qmp_calc_dirty_rate(int64_t calc_time, bool has_sample_pages,
+ int64_t sample_pages, Error **errp)
{
static struct DirtyRateConfig config;
QemuThread thread;
return;
}
+ 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;
+ }
+
/*
* Init calculation state as unstarted.
*/
}
config.sample_period_seconds = calc_time;
- config.sample_pages_per_gigabytes = DIRTYRATE_DEFAULT_SAMPLE_PAGES;
+ config.sample_pages_per_gigabytes = sample_pages;
qemu_thread_create(&thread, "get_dirtyrate", get_dirtyrate_thread,
(void *)&config, QEMU_THREAD_DETACHED);
}
/*
* Sample 512 pages per GB as default.
- * TODO: Make it configurable.
*/
#define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512
#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 */
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 */
};
void *get_dirtyrate_thread(void *arg);
#
# @calc-time: time in units of second for sample dirty pages
#
+# @sample-pages: page count per GB for sample dirty pages
+# the default value is 512 (since 6.1)
+#
# Since: 5.2
#
##
'data': {'*dirty-rate': 'int64',
'status': 'DirtyRateStatus',
'start-time': 'int64',
- 'calc-time': 'int64'} }
+ 'calc-time': 'int64',
+ 'sample-pages': 'uint64'} }
##
# @calc-dirty-rate:
#
# @calc-time: time in units of second for sample dirty pages
#
+# @sample-pages: page count per GB for sample dirty pages
+# the default value is 512 (since 6.1)
+#
# Since: 5.2
#
# Example:
-# {"command": "calc-dirty-rate", "data": {"calc-time": 1} }
+# {"command": "calc-dirty-rate", "data": {"calc-time": 1,
+# 'sample-pages': 512} }
#
##
-{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64'} }
+{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64',
+ '*sample-pages': 'int'} }
##
# @query-dirty-rate: