qemu/hw/mem
Yangming e919402b9e virtio-balloon: optimize the virtio-balloon on the ARM platform
Optimize the virtio-balloon feature on the ARM platform by adding
a variable to keep track of the current hot-plugged pc-dimm size,
instead of traversing the virtual machine's memory modules to count
the current RAM size during the balloon inflation or deflation
process. This variable can be updated only when plugging or unplugging
the device, which will result in an increase of approximately 60%
efficiency of balloon process on the ARM platform.

We tested the total amount of time required for the balloon inflation process on ARM:
inflate the balloon to 64GB of a 128GB guest under stress.
Before: 102 seconds
After: 42 seconds

Signed-off-by: Qi Xi <xiqi2@huawei.com>
Signed-off-by: Ming Yang yangming73@huawei.com
Message-Id: <e13bc78f96774bfab4576814c293aa52@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
2023-04-21 04:25:52 -04:00
..
cxl_type3_stubs.c hw/mem/cxl_type3: Add CXL RAS Error Injection Support. 2023-03-07 12:39:00 -05:00
cxl_type3.c hw/mem/cxl_type3: Add CXL RAS Error Injection Support. 2023-03-07 12:39:00 -05:00
Kconfig hw/cxl/device: Add a memory device (8.2.8.5) 2022-05-13 06:13:36 -04:00
memory-device.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
meson.build hw/mem/cxl_type3: Add CXL RAS Error Injection Support. 2023-03-07 12:39:00 -05:00
npcm7xx_mc.c hw/*: Use type casting for SysBusDevice in NPCM7XX 2021-01-12 21:19:02 +00:00
nvdimm.c hw/mem/nvdimm: fix error message for 'unarmed' flag 2022-10-24 12:38:38 +02:00
pc-dimm.c virtio-balloon: optimize the virtio-balloon on the ARM platform 2023-04-21 04:25:52 -04:00
sparse-mem.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00