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| author | Lidong Chen <jemmy858585@gmail.com> | 2017-03-15 11:37:33 +0800 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2017-03-16 08:58:27 +0100 |
| commit | 1cf6aa74b32f18f9b5faf525a93b0c1f609acb1f (patch) | |
| tree | 2dec61809940e38c6dee28f8aaf41122f80cbc18 /migration/vmstate.c | |
| parent | 4af245dc3e6e5c96405b3edb9d75657504256469 (diff) | |
migration/block: Avoid invoking blk_drain too frequently
Increase bmds->cur_dirty after submit io, so reduce the frequency
involve into blk_drain, and improve the performance obviously
when block migration.
The performance test result of this patch:
During the block dirty save phase, this patch improve guest os IOPS
from 4.0K to 9.5K. and improve the migration speed from
505856 rsec/s to 855756 rsec/s.
Signed-off-by: Lidong Chen <jemmy858585@gmail.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration/vmstate.c')
0 files changed, 0 insertions, 0 deletions