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[PATCH v1 1/5] kvm, memory: Optimize dirty page collection for dirty rin
From: |
wucy11 |
Subject: |
[PATCH v1 1/5] kvm, memory: Optimize dirty page collection for dirty ring |
Date: |
Wed, 23 Mar 2022 11:18:34 +0800 |
From: Chongyun Wu <wucy11@chinatelecom.cn>
When log_sync_global of dirty ring is called, it will collect
dirty pages on all cpus, including all dirty pages on memslot,
so when memory_region_sync_dirty_bitmap collects dirty pages
from KVM, this interface needs to be called once, instead of
traversing every dirty page. Each memslot is called once,
which is meaningless and time-consuming. So only need to call
log_sync_global once in memory_region_sync_dirty_bitmap.
Signed-off-by: Chongyun Wu <wucy11@chinatelecom.cn>
---
softmmu/memory.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 8060c6d..46c3ff9 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -2184,6 +2184,12 @@ static void memory_region_sync_dirty_bitmap(MemoryRegion
*mr)
*/
listener->log_sync_global(listener);
trace_memory_region_sync_dirty(mr ? mr->name : "(all)",
listener->name, 1);
+ /*
+ * The log_sync_global of the dirty ring will collect the dirty
+ * pages of all memslots at one time, so there is no need to
+ * call log_sync_global once when traversing each memslot.
+ */
+ break;
}
}
}
--
1.8.3.1
- [PATCH v1 0/5] Dirty ring and auto converge optimization, wucy11, 2022/03/22
- [PATCH v1 1/5] kvm, memory: Optimize dirty page collection for dirty ring,
wucy11 <=
- [PATCH v1 2/5] kvm: Dynamically adjust the rate of dirty ring reaper thread, wucy11, 2022/03/22
- [PATCH v1 3/5] kvm: Dirty ring autoconverge optmization for kvm_cpu_synchronize_kick_all, wucy11, 2022/03/22
- [PATCH v1 4/5] kvm: Introduce a dirty rate calculation method based on dirty ring, wucy11, 2022/03/22
- [PATCH v1 5/5] migration: Calculate the appropriate throttle for autoconverge, wucy11, 2022/03/22