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| author | Hyman Huang(黄勇) <huangy81@chinatelecom.cn> | 2021-06-29 16:01:18 +0000 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2021-11-01 22:56:43 +0100 |
| commit | 7786ae40ba4e7d5b9ebbfd07924f4379e218c6ef (patch) | |
| tree | 87fcdf8f6c7056a8af9e48564e29a430bfacbb57 /accel | |
| parent | b390afd8c50b18b3d6c7ed76e8e066dc64b8e206 (diff) | |
| download | qemu-7786ae40ba4e7d5b9ebbfd07924f4379e218c6ef.zip qemu-7786ae40ba4e7d5b9ebbfd07924f4379e218c6ef.tar.gz qemu-7786ae40ba4e7d5b9ebbfd07924f4379e218c6ef.tar.bz2 | |
KVM: introduce dirty_pages and kvm_dirty_ring_enabled
dirty_pages is used to calculate dirtyrate via dirty ring, when
enabled, kvm-reaper will increase the dirty pages after gfns
being dirtied.
kvm_dirty_ring_enabled shows if kvm-reaper is working. dirtyrate
thread could use it to check if measurement can base on dirty
ring feature.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Message-Id: <fee5fb2ab17ec2159405fc54a3cff8e02322f816.1624040308.git.huangy81@chinatelecom.cn>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'accel')
| -rw-r--r-- | accel/kvm/kvm-all.c | 7 | ||||
| -rw-r--r-- | accel/stubs/kvm-stub.c | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index db8d83b..eecd803 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -469,6 +469,7 @@ int kvm_init_vcpu(CPUState *cpu, Error **errp) cpu->kvm_fd = ret; cpu->kvm_state = s; cpu->vcpu_dirty = true; + cpu->dirty_pages = 0; mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); if (mmap_size < 0) { @@ -743,6 +744,7 @@ static uint32_t kvm_dirty_ring_reap_one(KVMState *s, CPUState *cpu) count++; } cpu->kvm_fetch_index = fetch; + cpu->dirty_pages += count; return count; } @@ -2296,6 +2298,11 @@ bool kvm_vcpu_id_is_valid(int vcpu_id) return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); } +bool kvm_dirty_ring_enabled(void) +{ + return kvm_state->kvm_dirty_ring_size ? true : false; +} + static int kvm_init(MachineState *ms) { MachineClass *mc = MACHINE_GET_CLASS(ms); diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c index 5b1d00a..5319573 100644 --- a/accel/stubs/kvm-stub.c +++ b/accel/stubs/kvm-stub.c @@ -147,4 +147,9 @@ bool kvm_arm_supports_user_irq(void) { return false; } + +bool kvm_dirty_ring_enabled(void) +{ + return false; +} #endif |