migration: add postcopy total blocktime into query-migrate

Postcopy total blocktime is available on destination side only.
But query-migrate was possible only for source. This patch
adds ability to call query-migrate on destination.
To be able to see postcopy blocktime, need to request postcopy-blocktime
capability.

The query-migrate command will show following sample result:
{"return":
    "postcopy-vcpu-blocktime": [115, 100],
    "status": "completed",
    "postcopy-blocktime": 100
}}

postcopy_vcpu_blocktime contains list, where the first item is the first
vCPU in QEMU.

This patch has a drawback, it combines states of incoming and
outgoing migration. Ongoing migration state will overwrite incoming
state. Looks like better to separate query-migrate for incoming and
outgoing migration or add parameter to indicate type of migration.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Alexey Perevalov 2017-10-30 16:16:30 +03:00 committed by Juan Quintela
parent 5f32dc8ee0
commit ca6011c232
6 changed files with 124 additions and 5 deletions

15
hmp.c
View File

@ -264,6 +264,21 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
info->cpu_throttle_percentage);
}
if (info->has_postcopy_blocktime) {
monitor_printf(mon, "postcopy blocktime: %" PRId64 "\n",
info->postcopy_blocktime);
}
if (info->has_postcopy_vcpu_blocktime) {
Visitor *v;
char *str;
v = string_output_visitor_new(false, &str);
visit_type_int64List(v, NULL, &info->postcopy_vcpu_blocktime, NULL);
visit_complete(v, &str);
monitor_printf(mon, "postcopy vcpu blocktime: %s\n", str);
g_free(str);
visit_free(v);
}
qapi_free_MigrationInfo(info);
qapi_free_MigrationCapabilityStatusList(caps);
}

View File

@ -591,14 +591,15 @@ static void populate_disk_info(MigrationInfo *info)
}
}
MigrationInfo *qmp_query_migrate(Error **errp)
static void fill_source_migration_info(MigrationInfo *info)
{
MigrationInfo *info = g_malloc0(sizeof(*info));
MigrationState *s = migrate_get_current();
switch (s->state) {
case MIGRATION_STATUS_NONE:
/* no migration has happened ever */
/* do not overwrite destination migration status */
return;
break;
case MIGRATION_STATUS_SETUP:
info->has_status = true;
@ -649,8 +650,6 @@ MigrationInfo *qmp_query_migrate(Error **errp)
break;
}
info->status = s->state;
return info;
}
/**
@ -714,6 +713,41 @@ static bool migrate_caps_check(bool *cap_list,
return true;
}
static void fill_destination_migration_info(MigrationInfo *info)
{
MigrationIncomingState *mis = migration_incoming_get_current();
switch (mis->state) {
case MIGRATION_STATUS_NONE:
return;
break;
case MIGRATION_STATUS_SETUP:
case MIGRATION_STATUS_CANCELLING:
case MIGRATION_STATUS_CANCELLED:
case MIGRATION_STATUS_ACTIVE:
case MIGRATION_STATUS_POSTCOPY_ACTIVE:
case MIGRATION_STATUS_FAILED:
case MIGRATION_STATUS_COLO:
info->has_status = true;
break;
case MIGRATION_STATUS_COMPLETED:
info->has_status = true;
fill_destination_postcopy_migration_info(info);
break;
}
info->status = mis->state;
}
MigrationInfo *qmp_query_migrate(Error **errp)
{
MigrationInfo *info = g_malloc0(sizeof(*info));
fill_destination_migration_info(info);
fill_source_migration_info(info);
return info;
}
void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
Error **errp)
{

View File

@ -71,6 +71,10 @@ struct MigrationIncomingState {
MigrationIncomingState *migration_incoming_get_current(void);
void migration_incoming_state_destroy(void);
/*
* Functions to work with blocktime context
*/
void fill_destination_postcopy_migration_info(MigrationInfo *info);
#define TYPE_MIGRATION "migration"

View File

@ -108,6 +108,55 @@ static struct PostcopyBlocktimeContext *blocktime_context_new(void)
return ctx;
}
static int64List *get_vcpu_blocktime_list(PostcopyBlocktimeContext *ctx)
{
int64List *list = NULL, *entry = NULL;
int i;
for (i = smp_cpus - 1; i >= 0; i--) {
entry = g_new0(int64List, 1);
entry->value = ctx->vcpu_blocktime[i];
entry->next = list;
list = entry;
}
return list;
}
/*
* This function just populates MigrationInfo from postcopy's
* blocktime context. It will not populate MigrationInfo,
* unless postcopy-blocktime capability was set.
*
* @info: pointer to MigrationInfo to populate
*/
void fill_destination_postcopy_migration_info(MigrationInfo *info)
{
MigrationIncomingState *mis = migration_incoming_get_current();
PostcopyBlocktimeContext *bc = mis->blocktime_ctx;
if (!bc) {
return;
}
info->has_postcopy_blocktime = true;
info->postcopy_blocktime = bc->total_blocktime;
info->has_postcopy_vcpu_blocktime = true;
info->postcopy_vcpu_blocktime = get_vcpu_blocktime_list(bc);
}
static uint64_t get_postcopy_total_blocktime(void)
{
MigrationIncomingState *mis = migration_incoming_get_current();
PostcopyBlocktimeContext *bc = mis->blocktime_ctx;
if (!bc) {
return 0;
}
return bc->total_blocktime;
}
/**
* receive_ufd_features: check userfault fd features, to request only supported
* features in the future.
@ -482,6 +531,9 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis)
munmap(mis->postcopy_tmp_zero_page, mis->largest_page_size);
mis->postcopy_tmp_zero_page = NULL;
}
trace_postcopy_ram_incoming_cleanup_blocktime(
get_postcopy_total_blocktime());
trace_postcopy_ram_incoming_cleanup_exit();
return 0;
}
@ -959,6 +1011,10 @@ void *postcopy_get_tmp_page(MigrationIncomingState *mis)
#else
/* No target OS support, stubs just fail */
void fill_destination_postcopy_migration_info(MigrationInfo *info)
{
}
bool postcopy_ram_supported_by_host(MigrationIncomingState *mis)
{
error_report("%s: No OS support", __func__);

View File

@ -198,6 +198,7 @@ postcopy_ram_incoming_cleanup_closeuf(void) ""
postcopy_ram_incoming_cleanup_entry(void) ""
postcopy_ram_incoming_cleanup_exit(void) ""
postcopy_ram_incoming_cleanup_join(void) ""
postcopy_ram_incoming_cleanup_blocktime(uint64_t total) "total blocktime %" PRIu64
save_xbzrle_page_skipping(void) ""
save_xbzrle_page_overflow(void) ""
ram_save_iterate_big_wait(uint64_t milliconds, int iterations) "big wait: %" PRIu64 " milliseconds, %d iterations"

View File

@ -155,6 +155,13 @@
# @error-desc: the human readable error description string, when
# @status is 'failed'. Clients should not attempt to parse the
# error strings. (Since 2.7)
#
# @postcopy-blocktime: total time when all vCPU were blocked during postcopy
# live migration (Since 2.12)
#
# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU (Since 2.12)
#
#
# Since: 0.14.0
##
@ -167,7 +174,9 @@
'*downtime': 'int',
'*setup-time': 'int',
'*cpu-throttle-percentage': 'int',
'*error-desc': 'str'} }
'*error-desc': 'str',
'*postcopy-blocktime' : 'int64',
'*postcopy-vcpu-blocktime': ['int64']} }
##
# @query-migrate: