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X-Received-From: 2607:f8b0:4864:20::542 Subject: [Qemu-devel] [PATCH 2/3] migration: Add qmp command for migrate_set_max_cpu_throttle X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liqiang02@corp.netease.com, Li Qiang , hzliuyingdong@corp.netease.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The default max cpu throttle is 99, this is too big that may influence the guest loads. Add a qmp to config it can make it more flexible. Signed-off-by: Li Qiang --- cpus.c | 5 +++++ include/qom/cpu.h | 8 ++++++++ migration/migration.c | 10 ++++++++++ qapi/migration.json | 13 +++++++++++++ 4 files changed, 36 insertions(+) diff --git a/cpus.c b/cpus.c index 6569c73d24..0505477086 100644 --- a/cpus.c +++ b/cpus.c @@ -765,6 +765,11 @@ void cpu_throttle_set(int new_throttle_pct) CPU_THROTTLE_TIMESLICE_NS); } +void set_cpu_max_throttle(int64_t max_pct) +{ + throttle_percentage_max = max_pct; +} + void cpu_throttle_stop(void) { atomic_set(&throttle_percentage, 0); diff --git a/include/qom/cpu.h b/include/qom/cpu.h index bd796579ee..4328d2e8ad 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -816,6 +816,14 @@ CPUState *cpu_by_arch_id(int64_t id); void cpu_throttle_set(int new_throttle_pct); /** + * set_cpu_max_throttle: + * @max_pct: the max percent of sleep time. Valid range is 1 to 99. + * + * Set the max throttle percentage. + */ +void set_cpu_max_throttle(int64_t max_pct); + +/** * cpu_throttle_stop: * * Stops the vcpu throttling started by cpu_throttle_set. diff --git a/migration/migration.c b/migration/migration.c index b7d9854bda..9c7a6f7477 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1774,6 +1774,16 @@ void qmp_migrate_set_speed(int64_t value, Error **errp) qmp_migrate_set_parameters(&p, errp); } +void qmp_migrate_set_max_cpu_throttle(int64_t value, Error **errp) +{ + if (value > 99 || value < 1) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, " max cpu throttle", + "not in 1 between 99"); + return; + } + set_cpu_max_throttle(value); +} + void qmp_migrate_set_downtime(double value, Error **errp) { if (value < 0 || value > MAX_MIGRATE_DOWNTIME_SECONDS) { diff --git a/qapi/migration.json b/qapi/migration.json index 186e8a7303..2ef3ddfe43 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -997,6 +997,19 @@ { 'command': 'migrate_set_speed', 'data': {'value': 'int'} } ## +# @migrate_set_max_cpu_throttle: +# +# Set maximum cpu throttle for migration. +# +# @value: maximum cpu throttle. +# +# Returns: nothing on success +# +# Since: 2.12 +## +{ 'command': 'migrate_set_max_cpu_throttle', 'data': {'value': 'int'} } + +## # @migrate-set-cache-size: # # Set cache size to be used by XBZRLE migration