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Add build configs for wearable tunables

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Low memory devices place special emphasis on memory constraints and cpu
utilization. We want to expose a set of build configurations that allow
these devices to fine tune resource usage during OTA installation.

Our strategy will be the following.
1. For any tunable needed in first stage init, read the .ro prop during
   ota installation, propogate the configuration to SnapshotUpdateStatus
   proto, then read the property from /metadata upon first reboot (since
   .ro properties are not available here)
   2. For tunables which aren't needed until second stage init, read the
   .ro prop directly.

This first CL will just add the build configurations to the build
system. Subsequent CL's will forward the configs to protobufs and
snapuserd daemon

Bug: 332255580
Test: th
Change-Id: I31b36b42f8fba997c772fe1a4ba99b17128b3eca
This commit is contained in:
Daniel Zheng
2024-05-15 11:14:11 -07:00
parent 43b6834425
commit 427fea8b49
1 changed files with 15 additions and 0 deletions
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15
target/product/virtual_ab_ota/vabc_features.mk
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@@ -34,6 +34,21 @@ PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.userspace.snapshots.enabled=true
PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.io_uring.enabled=true
PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.xor.enabled=true
PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.batch_writes=true
# Low memory device configurations. If memory usage and cpu utilization is
# a bottleneck during OTA, the below configurations can be added to a
# device's .mk file improve performance for low mem devices. Disabling
# ro.virtual_ab.compression.xor.enabled and ro.virtual_ab.io_uring.enabled
# is also recommended
#
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.o_direct.enabled=true
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.merge_thread_priority=19
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.worker_thread_priority=0
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.num_worker_threads=3
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.num_merge_threads=1
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.num_verify_threads=1
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.cow_op_merge_size=16
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.verify_threshold_size=1073741824
# PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.verify_block_size=1048576
# Enabling this property, will improve OTA install time
# but will use an additional CPU core