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Add dirty-sync-missed-zero-copy migration stat

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Signed-off-by: Leonardo Bras <leobras@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220711211112.18951-3-leobras@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Leonardo Bras 2022-07-11 18:11:12 -03:00 committed by Dr. David Alan Gilbert
parent 927f93e099
commit cf20c89733
3 changed files with 13 additions and 1 deletions
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2
migration/migration.c
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@ -1057,6 +1057,8 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
info->ram->normal_bytes = ram_counters.normal * page_size;
info->ram->mbps = s->mbps;
info->ram->dirty_sync_count = ram_counters.dirty_sync_count;
info->ram->dirty_sync_missed_zero_copy =
ram_counters.dirty_sync_missed_zero_copy;
info->ram->postcopy_requests = ram_counters.postcopy_requests;
info->ram->page_size = page_size;
info->ram->multifd_bytes = ram_counters.multifd_bytes;

5
monitor/hmp-cmds.c
View File

@ -307,6 +307,11 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "postcopy ram: %" PRIu64 " kbytes\n",
info->ram->postcopy_bytes >> 10);
}
if (info->ram->dirty_sync_missed_zero_copy) {
monitor_printf(mon,
"Zero-copy-send fallbacks happened: %" PRIu64 " times\n",
info->ram->dirty_sync_missed_zero_copy);
}
}
if (info->has_disk) {

7
qapi/migration.json
View File

@ -55,6 +55,10 @@
# @postcopy-bytes: The number of bytes sent during the post-copy phase
# (since 7.0).
#
# @dirty-sync-missed-zero-copy: Number of times dirty RAM synchronization could
# not avoid copying dirty pages. This is between
# 0 and @dirty-sync-count * @multifd-channels.
# (since 7.1)
# Since: 0.14
##
{ 'struct': 'MigrationStats',
@ -65,7 +69,8 @@
'postcopy-requests' : 'int', 'page-size' : 'int',
'multifd-bytes' : 'uint64', 'pages-per-second' : 'uint64',
'precopy-bytes' : 'uint64', 'downtime-bytes' : 'uint64',
'postcopy-bytes' : 'uint64' } }
'postcopy-bytes' : 'uint64',
'dirty-sync-missed-zero-copy' : 'uint64' } }
##
# @XBZRLECacheStats: