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| author | Peter Xu <peterx@redhat.com> | 2025-06-13 10:08:01 -0400 |
|---|---|---|
| committer | Fabiano Rosas <farosas@suse.de> | 2025-07-11 10:37:37 -0300 |
| commit | adb13d6e42d6e0084e19a41303138d5d022e5904 (patch) | |
| tree | 3df2d37b8c106dc7d33b30a68c6802d0f6591869 /scripts/qapi/expr.py | |
| parent | 7aaa1fc072ca7b9abf08c62504faa96126b583ce (diff) | |
| download | qemu-adb13d6e42d6e0084e19a41303138d5d022e5904.zip qemu-adb13d6e42d6e0084e19a41303138d5d022e5904.tar.gz qemu-adb13d6e42d6e0084e19a41303138d5d022e5904.tar.bz2 | |
migration/postcopy: Avoid clearing dirty bitmap for postcopy too
This is a follow up on the other commit "migration/ram: avoid to do log
clear in the last round" but for postcopy.
https://lore.kernel.org/r/20250514115827.3216082-1-yanfei.xu@bytedance.com
I can observe more than 10% reduction of average page fault latency during
postcopy phase with this optimization:
Before: 268.00us (+-1.87%)
After: 232.67us (+-2.01%)
The test was done with a 16GB VM with 80 vCPUs, running a workload that
busy random writes to 13GB memory.
Cc: Yanfei Xu <yanfei.xu@bytedance.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20250613140801.474264-12-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Diffstat (limited to 'scripts/qapi/expr.py')
0 files changed, 0 insertions, 0 deletions