From e2ee2005585dd2be792b1e5e72cd4c07d787bc3e Mon Sep 17 00:00:00 2001 From: Juan Quintela Date: Thu, 4 May 2023 12:33:56 +0200 Subject: [PATCH] migration: Document all migration_stats MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Message-Id: <20230504103357.22130-2-quintela@redhat.com> Reviewed-by: David Edmondson Reviewed-by: Daniel P. Berrangé Signed-off-by: Juan Quintela --- migration/migration-stats.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/migration/migration-stats.h b/migration/migration-stats.h index 149af932d7..50966328b2 100644 --- a/migration/migration-stats.h +++ b/migration/migration-stats.h @@ -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; -- 2.11.0