Currently, the default maximum CPU throttle for migration is 99(CPU_THROTTLE_PCT_MAX). This is too big and can make a remarkable performance effect for the guest. We see a lot of packets latency exceed 500ms when the CPU_THROTTLE_PCT_MAX reached. This patch set adds a new qmp command to limit the CPU throttle.
Li Qiang (3): migrate: replace the cpu throttle percentage max with a variable migration: Add qmp command for migrate_set_max_cpu_throttle hmp: add hmp for migrate_set_max_cpu_throttle cpus.c | 9 ++++++++- hmp-commands.hx | 14 ++++++++++++++ hmp.c | 6 ++++++ hmp.h | 1 + include/qom/cpu.h | 8 ++++++++ migration/migration.c | 10 ++++++++++ qapi/migration.json | 13 +++++++++++++ 7 files changed, 60 insertions(+), 1 deletion(-) -- 2.11.0
