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| author | Hyman Huang(黄勇) <huangy81@chinatelecom.cn> | 2022-06-26 01:38:35 +0800 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2022-07-20 12:15:08 +0100 |
| commit | baa609832e1849915b62be2abfbdc1d0e5909a7b (patch) | |
| tree | 3a679a7051cd4547dabd3afcf1b777bdb1aae60f /include | |
| parent | 4a06a7cc053deae16864359a5149bcb4442f8d2a (diff) | |
| download | qemu-baa609832e1849915b62be2abfbdc1d0e5909a7b.zip qemu-baa609832e1849915b62be2abfbdc1d0e5909a7b.tar.gz qemu-baa609832e1849915b62be2abfbdc1d0e5909a7b.tar.bz2 | |
softmmu/dirtylimit: Implement virtual CPU throttle
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) <huangy81@chinatelecom.cn>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <977e808e03a1cef5151cae75984658b6821be618.1656177590.git.huangy81@chinatelecom.cn>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/core/cpu.h | 6 | ||||
| -rw-r--r-- | include/sysemu/dirtylimit.h | 15 |
2 files changed, 21 insertions, 0 deletions
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 |