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migration: Document all migration_stats 

Message-Id: <20230504103357.22130-2-quintela@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Juan Quintela 2023-05-04 12:33:56 +02:00
parent 3ec6828a79
commit e2ee200558
1 changed files with 43 additions and 0 deletions
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43
migration/migration-stats.h
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@ -22,17 +22,60 @@
* one thread).
*/
typedef struct {
/*
* Number of bytes that were dirty last time that we synced with
* the guest memory. We use that to calculate the downtime. As
* the remaining dirty amounts to what we know that is still dirty
* since last iteration, not counting what the guest has dirtied
* since we synchronized bitmaps.
*/
Stat64 dirty_bytes_last_sync;
/*
* Number of pages dirtied per second.
*/
Stat64 dirty_pages_rate;
/*
* Number of times we have synchronized guest bitmaps.
*/
Stat64 dirty_sync_count;
/*
* Number of times zero copy failed to send any page using zero
* copy.
*/
Stat64 dirty_sync_missed_zero_copy;
/*
* Number of bytes sent at migration completion stage while the
* guest is stopped.
*/
Stat64 downtime_bytes;
/*
* Number of pages transferred that were full of zeros.
*/
Stat64 zero_pages;
/*
* Number of bytes sent through multifd channels.
*/
Stat64 multifd_bytes;
/*
* Number of pages transferred that were not full of zeros.
*/
Stat64 normal_pages;
/*
* Number of bytes sent during postcopy.
*/
Stat64 postcopy_bytes;
/*
* Number of postcopy page faults that we have handled during
* postcopy stage.
*/
Stat64 postcopy_requests;
/*
* Number of bytes sent during precopy stage.
*/
Stat64 precopy_bytes;
/*
* Total number of bytes transferred.
*/
Stat64 transferred;
} MigrationAtomicStats;