migration/dirtyrate.c | 31 ++++++++++++++++--- migration/dirtyrate.h | 8 ++++- qapi/migration.json | 85 ++++++++++++++++++++++++++++----------------------- 3 files changed, 80 insertions(+), 44 deletions(-)
From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
introduce optional sample-pages argument in calc-dirty-rate,
making sample page count per GB configurable so that more
accurate dirtyrate can be calculated.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
---
migration/dirtyrate.c | 31 ++++++++++++++++---
migration/dirtyrate.h | 8 ++++-
qapi/migration.json | 85 ++++++++++++++++++++++++++++-----------------------
3 files changed, 80 insertions(+), 44 deletions(-)
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index ccb9814..2ee3890 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -48,6 +48,12 @@ static bool is_sample_period_valid(int64_t sec)
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);
@@ -72,13 +78,15 @@ static struct DirtyRateInfo *query_dirty_rate_info(void)
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;
@@ -86,6 +94,7 @@ static void init_dirtyrate_stat(int64_t start_time, int64_t calc_time)
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)
@@ -361,6 +370,7 @@ void *get_dirtyrate_thread(void *arg)
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);
@@ -371,7 +381,8 @@ void *get_dirtyrate_thread(void *arg)
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);
@@ -383,7 +394,8 @@ void *get_dirtyrate_thread(void *arg)
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;
@@ -404,6 +416,17 @@ void qmp_calc_dirty_rate(int64_t calc_time, Error **errp)
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.
*/
@@ -415,7 +438,7 @@ void qmp_calc_dirty_rate(int64_t calc_time, Error **errp)
}
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);
}
diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
index 6ec4295..e1fd290 100644
--- a/migration/dirtyrate.h
+++ b/migration/dirtyrate.h
@@ -15,7 +15,6 @@
/*
* Sample 512 pages per GB as default.
- * TODO: Make it configurable.
*/
#define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512
@@ -35,6 +34,12 @@
#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 */
@@ -63,6 +68,7 @@ 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 */
};
void *get_dirtyrate_thread(void *arg);
diff --git a/qapi/migration.json b/qapi/migration.json
index 0b17cce..b8f0bb5 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1732,45 +1732,6 @@
'data': [ 'unstarted', 'measuring', 'measured'] }
##
-# @DirtyRateInfo:
-#
-# Information about current dirty page rate of vm.
-#
-# @dirty-rate: an estimate of the dirty page rate of the VM in units of
-# MB/s, present only when estimating the rate has completed.
-#
-# @status: status containing dirtyrate query status includes
-# 'unstarted' or 'measuring' or 'measured'
-#
-# @start-time: start time in units of second for calculation
-#
-# @calc-time: time in units of second for sample dirty pages
-#
-# Since: 5.2
-#
-##
-{ 'struct': 'DirtyRateInfo',
- 'data': {'*dirty-rate': 'int64',
- 'status': 'DirtyRateStatus',
- 'start-time': 'int64',
- 'calc-time': 'int64'} }
-
-##
-# @calc-dirty-rate:
-#
-# start calculating dirty page rate for vm
-#
-# @calc-time: time in units of second for sample dirty pages
-#
-# Since: 5.2
-#
-# Example:
-# {"command": "calc-dirty-rate", "data": {"calc-time": 1} }
-#
-##
-{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64'} }
-
-##
# @query-dirty-rate:
#
# query dirty page rate in units of MB/s for vm
@@ -1951,3 +1912,49 @@
'data': { 'job-id': 'str',
'tag': 'str',
'devices': ['str'] } }
+
+##
+# @DirtyRateInfo:
+#
+# Information about current dirty page rate of vm.
+#
+# @dirty-rate: an estimate of the dirty page rate of the VM in units of
+# MB/s, present only when estimating the rate has completed.
+#
+# @status: status containing dirtyrate query status includes
+# 'unstarted' or 'measuring' or 'measured'
+#
+# @start-time: start time in units of second for calculation
+#
+# @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
+#
+##
+{ 'struct': 'DirtyRateInfo',
+ 'data': {'*dirty-rate': 'int64',
+ 'status': 'DirtyRateStatus',
+ 'start-time': 'int64',
+ 'calc-time': 'int64',
+ 'sample-pages': 'uint64'} }
+
+##
+# @calc-dirty-rate:
+#
+# start calculating dirty page rate for vm
+#
+# @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
+#
+# Example:
+# {"command": "calc-dirty-rate", "data": {"calc-time": 1, 'sample-pages': 512} }
+#
+##
+{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64', '*sample-pages': 'int'} }
--
1.8.3.1
* huangy81@chinatelecom.cn (huangy81@chinatelecom.cn) wrote: > From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> > > introduce optional sample-pages argument in calc-dirty-rate, > making sample page count per GB configurable so that more > accurate dirtyrate can be calculated. > > Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> The json change is a bit bigger now than the previous version, and it shouldn't be. > --- > migration/dirtyrate.c | 31 ++++++++++++++++--- > migration/dirtyrate.h | 8 ++++- > qapi/migration.json | 85 ++++++++++++++++++++++++++++----------------------- > 3 files changed, 80 insertions(+), 44 deletions(-) > > diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c > index ccb9814..2ee3890 100644 > --- a/migration/dirtyrate.c > +++ b/migration/dirtyrate.c > @@ -48,6 +48,12 @@ static bool is_sample_period_valid(int64_t sec) > 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); > @@ -72,13 +78,15 @@ static struct DirtyRateInfo *query_dirty_rate_info(void) > 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; > @@ -86,6 +94,7 @@ static void init_dirtyrate_stat(int64_t start_time, int64_t calc_time) > 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) > @@ -361,6 +370,7 @@ void *get_dirtyrate_thread(void *arg) > 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); > @@ -371,7 +381,8 @@ void *get_dirtyrate_thread(void *arg) > > 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); > > @@ -383,7 +394,8 @@ void *get_dirtyrate_thread(void *arg) > 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; > @@ -404,6 +416,17 @@ void qmp_calc_dirty_rate(int64_t calc_time, Error **errp) > 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. > */ > @@ -415,7 +438,7 @@ void qmp_calc_dirty_rate(int64_t calc_time, Error **errp) > } > > 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); > } > diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h > index 6ec4295..e1fd290 100644 > --- a/migration/dirtyrate.h > +++ b/migration/dirtyrate.h > @@ -15,7 +15,6 @@ > > /* > * Sample 512 pages per GB as default. > - * TODO: Make it configurable. > */ > #define DIRTYRATE_DEFAULT_SAMPLE_PAGES 512 > > @@ -35,6 +34,12 @@ > #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 */ > @@ -63,6 +68,7 @@ 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 */ > }; > > void *get_dirtyrate_thread(void *arg); > diff --git a/qapi/migration.json b/qapi/migration.json > index 0b17cce..b8f0bb5 100644 > --- a/qapi/migration.json > +++ b/qapi/migration.json > @@ -1732,45 +1732,6 @@ > 'data': [ 'unstarted', 'measuring', 'measured'] } > > ## > -# @DirtyRateInfo: > -# > -# Information about current dirty page rate of vm. > -# > -# @dirty-rate: an estimate of the dirty page rate of the VM in units of > -# MB/s, present only when estimating the rate has completed. > -# > -# @status: status containing dirtyrate query status includes > -# 'unstarted' or 'measuring' or 'measured' > -# > -# @start-time: start time in units of second for calculation > -# > -# @calc-time: time in units of second for sample dirty pages > -# > -# Since: 5.2 > -# > -## > -{ 'struct': 'DirtyRateInfo', > - 'data': {'*dirty-rate': 'int64', > - 'status': 'DirtyRateStatus', > - 'start-time': 'int64', > - 'calc-time': 'int64'} } > - > -## > -# @calc-dirty-rate: > -# > -# start calculating dirty page rate for vm > -# > -# @calc-time: time in units of second for sample dirty pages > -# > -# Since: 5.2 > -# > -# Example: > -# {"command": "calc-dirty-rate", "data": {"calc-time": 1} } > -# > -## > -{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64'} } > - > -## I don't see why you're moving the exisitn DirtyRateInfoa nd calc-dirty-rate. > # @query-dirty-rate: > # > # query dirty page rate in units of MB/s for vm > @@ -1951,3 +1912,49 @@ > 'data': { 'job-id': 'str', > 'tag': 'str', > 'devices': ['str'] } } > + > +## > +# @DirtyRateInfo: > +# > +# Information about current dirty page rate of vm. > +# > +# @dirty-rate: an estimate of the dirty page rate of the VM in units of > +# MB/s, present only when estimating the rate has completed. > +# > +# @status: status containing dirtyrate query status includes > +# 'unstarted' or 'measuring' or 'measured' > +# > +# @start-time: start time in units of second for calculation > +# > +# @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 These are still since 5.2; the only difference is the new @sample-pages, so it should be something like: +# @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 to indicate just that field has been added. > +## > +{ 'struct': 'DirtyRateInfo', > + 'data': {'*dirty-rate': 'int64', > + 'status': 'DirtyRateStatus', > + 'start-time': 'int64', > + 'calc-time': 'int64', > + 'sample-pages': 'uint64'} } > + > +## > +# @calc-dirty-rate: > +# > +# start calculating dirty page rate for vm > +# > +# @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 > +# > +# Example: > +# {"command": "calc-dirty-rate", "data": {"calc-time": 1, 'sample-pages': 512} } > +# > +## > +{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64', '*sample-pages': 'int'} } > -- > 1.8.3.1 > > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
© 2016 - 2024 Red Hat, Inc.