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 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/hw') diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 996f94059f..500503da13 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). */ -- cgit v1.2.3