@@ -402,6 +402,16 @@ will now cause the transition from precopy to postcopy.
It can be issued immediately after migration is started or any
time later on. Issuing it after the end of a migration is harmless.
+Blocktime it's a postcopy live migration metric, intend to show
+when source vCPU was in state interruptable sleep due to pagefault.
+This value is calculated on destination side.
+To enable postcopy blocktime calculation, enter following command on destination
+monitor:
+
+migrate_set_capability postcopy-blocktime on
+
+Postcopy blocktime could be retrieved by query-migrate qmp command.
+
Note: During the postcopy phase, the bandwidth limits set using
migrate_set_speed is ignored (to avoid delaying requested pages that
the destination is waiting for).
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com> --- docs/migration.txt | 10 ++++++++++ 1 file changed, 10 insertions(+)