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[PATCH v23 2/8] cpus: Introduce cpu_list_generation_id
From: |
huangy81 |
Subject: |
[PATCH v23 2/8] cpus: Introduce cpu_list_generation_id |
Date: |
Thu, 19 May 2022 11:25:13 +0800 |
From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Introduce cpu_list_generation_id to track cpu list generation so
that cpu hotplug/unplug can be detected during measurement of
dirty page rate.
cpu_list_generation_id could be used to detect changes of cpu
list, which is prepared for dirty page rate measurement.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Reviewed-by: Peter Xu <peterx@redhat.com>
---
cpus-common.c | 8 ++++++++
include/exec/cpu-common.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/cpus-common.c b/cpus-common.c
index db459b4..793364d 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -73,6 +73,12 @@ static int cpu_get_free_index(void)
}
CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
+static unsigned int cpu_list_generation_id;
+
+unsigned int cpu_list_generation_id_get(void)
+{
+ return cpu_list_generation_id;
+}
void cpu_list_add(CPUState *cpu)
{
@@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu)
assert(!cpu_index_auto_assigned);
}
QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
+ cpu_list_generation_id++;
}
void cpu_list_remove(CPUState *cpu)
@@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu)
QTAILQ_REMOVE_RCU(&cpus, cpu, node);
cpu->cpu_index = UNASSIGNED_CPU_INDEX;
+ cpu_list_generation_id++;
}
CPUState *qemu_get_cpu(int index)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 5968551..2281be4 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -35,6 +35,7 @@ extern intptr_t qemu_host_page_mask;
void qemu_init_cpu_list(void);
void cpu_list_lock(void);
void cpu_list_unlock(void);
+unsigned int cpu_list_generation_id_get(void);
void tcg_flush_softmmu_tlb(CPUState *cs);
--
1.8.3.1
- [PATCH v23 0/8] support dirty restraint on vCPU, huangy81, 2022/05/18
- [PATCH v23 1/8] accel/kvm/kvm-all: Refactor per-vcpu dirty ring reaping, huangy81, 2022/05/18
- [PATCH v23 2/8] cpus: Introduce cpu_list_generation_id,
huangy81 <=
- [PATCH v23 3/8] migration/dirtyrate: Refactor dirty page rate calculation, huangy81, 2022/05/18
- [PATCH v23 4/8] softmmu/dirtylimit: Implement vCPU dirtyrate calculation periodically, huangy81, 2022/05/18
- [PATCH v23 5/8] accel/kvm/kvm-all: Introduce kvm_dirty_ring_size function, huangy81, 2022/05/18
- [PATCH v23 6/8] softmmu/dirtylimit: Implement virtual CPU throttle, huangy81, 2022/05/18
- [PATCH v23 7/8] softmmu/dirtylimit: Implement dirty page rate limit, huangy81, 2022/05/18
- [PATCH v23 8/8] tests: Add dirty page rate limit test, huangy81, 2022/05/18
- Re: [PATCH v23 0/8] support dirty restraint on vCPU, Hyman Huang, 2022/05/18