Support set the CPU affinity of the live migration threads to improve the migration performance in specific cases. By default, the migration thread shares CPU resources with the VM process. With those API, support pin migration thread to expected CPU list to avoid preempting CPU resources of VM process.
Use the following methods to implement migration thread pin: - set the cpulist by virsh command 'virsh migrationpin' or migration param 'migration.pin'. These settings affect only the next migration - continuously query migration thread information[1] during the migration process until matches the thread number desired or migration finished unexpectedly - pin migration thread to expected cpulist, we can set/change the cpulist by 'virsh migrationpin' during migration at anytime Note that only support pin main thread of migration(live migration) and parallel send threads now. diff to v1: - add qmp command to query migration thread information - change the method of get qemu's migration thread info, from qemu event to qmp commands. - unified the interface of common migration and parallel migration. ref: [1]https://patchew.org/QEMU/20230203073519.2969147-1-jiangjiach...@huawei.com/ Jiang Jiacheng (8): migration/migration-pin: Implemente the interface of obtaining migration thread information migration/migration-pin: get migration pid for migration pin migration/migration-pin: Introduce virDomainPinMigrationThread API migration/migration-pin: Implement qemuDomainPinMigrationThread migration/migration-pin: support migration pin by virsh command migration/migration-pin: add migrationpin for migration parameters migration/migration-pin: pin migration thread immediately after get thread info migration/migration-pin/multifd-pin: add migration pin status handle include/libvirt/libvirt-domain.h | 15 +++ src/conf/domain_conf.c | 9 ++ src/conf/domain_conf.h | 10 ++ src/conf/virconftypes.h | 2 + src/driver-hypervisor.h | 6 + src/libvirt-domain.c | 65 ++++++++++ src/libvirt_private.syms | 1 + src/libvirt_public.syms | 4 + src/qemu/qemu_domain.c | 26 ++++ src/qemu/qemu_domain.h | 13 ++ src/qemu/qemu_driver.c | 56 +++++++++ src/qemu/qemu_migration.c | 111 +++++++++++++++++ src/qemu/qemu_migration.h | 33 +++--- src/qemu/qemu_migration_params.c | 40 +++++++ src/qemu/qemu_migration_params.h | 9 ++ src/qemu/qemu_monitor.c | 25 ++++ src/qemu/qemu_monitor.h | 11 ++ src/qemu/qemu_monitor_json.c | 62 ++++++++++ src/qemu/qemu_monitor_json.h | 5 + src/qemu/qemu_process.c | 198 +++++++++++++++++++++++++++++++ src/qemu/qemu_process.h | 13 ++ src/remote/remote_driver.c | 1 + src/remote/remote_protocol.x | 13 +- src/remote_protocol-structs | 5 + src/util/vircgroup.c | 3 + src/util/vircgroup.h | 1 + tools/virsh-domain.c | 69 +++++++++++ 27 files changed, 789 insertions(+), 17 deletions(-) -- 2.33.0
