From baa609832e1849915b62be2abfbdc1d0e5909a7b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Hyman=20Huang=28=E9=BB=84=E5=8B=87=29?= Date: Sun, 26 Jun 2022 01:38:35 +0800 Subject: softmmu/dirtylimit: Implement virtual CPU throttle MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Setup a negative feedback system when vCPU thread handling KVM_EXIT_DIRTY_RING_FULL exit by introducing throttle_us_per_full field in struct CPUState. Sleep throttle_us_per_full microseconds to throttle vCPU if dirtylimit is in service. Signed-off-by: Hyman Huang(黄勇) Reviewed-by: Peter Xu Message-Id: <977e808e03a1cef5151cae75984658b6821be618.1656177590.git.huangy81@chinatelecom.cn> Signed-off-by: Dr. David Alan Gilbert --- include/hw/core/cpu.h | 6 ++++++ include/sysemu/dirtylimit.h | 15 +++++++++++++++ 2 files changed, 21 insertions(+) (limited to 'include') diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 996f940..500503d 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -418,6 +418,12 @@ struct CPUState { */ bool throttle_thread_scheduled; + /* + * Sleep throttle_us_per_full microseconds once dirty ring is full + * if dirty page rate limit is enabled. + */ + int64_t throttle_us_per_full; + bool ignore_memory_transaction_failures; /* Used for user-only emulation of prctl(PR_SET_UNALIGN). */ diff --git a/include/sysemu/dirtylimit.h b/include/sysemu/dirtylimit.h index da459f0..8d2c1f3 100644 --- a/include/sysemu/dirtylimit.h +++ b/include/sysemu/dirtylimit.h @@ -19,4 +19,19 @@ void vcpu_dirty_rate_stat_start(void); void vcpu_dirty_rate_stat_stop(void); void vcpu_dirty_rate_stat_initialize(void); void vcpu_dirty_rate_stat_finalize(void); + +void dirtylimit_state_lock(void); +void dirtylimit_state_unlock(void); +void dirtylimit_state_initialize(void); +void dirtylimit_state_finalize(void); +bool dirtylimit_in_service(void); +bool dirtylimit_vcpu_index_valid(int cpu_index); +void dirtylimit_process(void); +void dirtylimit_change(bool start); +void dirtylimit_set_vcpu(int cpu_index, + uint64_t quota, + bool enable); +void dirtylimit_set_all(uint64_t quota, + bool enable); +void dirtylimit_vcpu_execute(CPUState *cpu); #endif -- cgit v1.1