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Postcopy: Add stats on page requests 

On the source, add a count of page requests received from the
destination.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Message-id: 1465816605-29488-4-git-send-email-dgilbert@redhat.com
Message-Id: <1465816605-29488-4-git-send-email-dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2016-06-13 12:16:42 +01:00 committed by Amit Shah
parent a22463a5dc
commit d3bf5418e2
5 changed files with 14 additions and 1 deletions
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4
hmp.c
View File

@ -217,6 +217,10 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "dirty pages rate: %" PRIu64 " pages\n",
info->ram->dirty_pages_rate);
}
if (info->ram->postcopy_requests) {
monitor_printf(mon, "postcopy request count: %" PRIu64 "\n",
info->ram->postcopy_requests);
}
}
if (info->has_disk) {

2
include/migration/migration.h
View File

@ -160,6 +160,8 @@ struct MigrationState
int64_t xbzrle_cache_size;
int64_t setup_time;
int64_t dirty_sync_count;
/* Count of requests incoming from destination */
int64_t postcopy_requests;
/* Flag set once the migration has been asked to enter postcopy */
bool start_postcopy;

2
migration/migration.c
View File

@ -614,6 +614,7 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
info->ram->normal_bytes = norm_mig_bytes_transferred();
info->ram->mbps = s->mbps;
info->ram->dirty_sync_count = s->dirty_sync_count;
info->ram->postcopy_requests = s->postcopy_requests;
if (s->state != MIGRATION_STATUS_COMPLETED) {
info->ram->remaining = ram_bytes_remaining();
@ -991,6 +992,7 @@ MigrationState *migrate_init(const MigrationParams *params)
s->dirty_sync_count = 0;
s->start_postcopy = false;
s->postcopy_after_devices = false;
s->postcopy_requests = 0;
s->migration_thread_running = false;
s->last_req_rb = NULL;
error_free(s->error);

1
migration/ram.c
View File

@ -1169,6 +1169,7 @@ int ram_save_queue_pages(MigrationState *ms, const char *rbname,
{
RAMBlock *ramblock;
ms->postcopy_requests++;
rcu_read_lock();
if (!rbname) {
/* Reuse last RAMBlock */

6
qapi-schema.json
View File

@ -382,13 +382,17 @@
#
# @dirty-sync-count: number of times that dirty ram was synchronized (since 2.1)
#
# @postcopy-requests: The number of page requests received from the destination
# (since 2.7)
#
# Since: 0.14.0
##
{ 'struct': 'MigrationStats',
'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
'duplicate': 'int', 'skipped': 'int', 'normal': 'int',
'normal-bytes': 'int', 'dirty-pages-rate' : 'int',
'mbps' : 'number', 'dirty-sync-count' : 'int' } }
'mbps' : 'number', 'dirty-sync-count' : 'int',
'postcopy-requests' : 'int' } }
##
# @XBZRLECacheStats