Description
SIMD
solana-foundation/solana-improvement-documents#182
Description
To improve performance, Solana programs are often compiled with a JIT that works
at the level of Basic Blocks — linear sequences of sBPF instructions with a
single entry and exit point, and no loops or branches. Basic Blocks allow for
efficient execution by reducing the overhead associated with tracking CU
consumption for each individual sBPF instruction.
However, when an exception is thrown during the execution of a Basic Block
(e.g., a null memory dereference or other faults), determining the exact number
of CUs consumed up to the point of failure requires additional effort. Requiring all clients to
track the exact number of executed sBPF instructions for consensus is costly and
unnecessary.
In the event of irregular failure, where execution aborts from the middle of
basic block, the full amount of requested CUs for the transaction will be charged to the CU
meter. This allows for a simple and efficient fallback mechanism that avoids the
need for tracking the exact number of executed instructions up to the point of
failure.
Feature ID
B7H2caeia4ZFcpE3QcgMqbiWiBtWrdBRBSJ1DY6Ktxbq
Activation Method
Single Core Contributor
Deployment Considerations
NA
Minimum Beta Version
No response
Minimum Stable Version
No response
Testnet Activation Epoch
No response
Devnet Activation Epoch
No response
Mainnet-Beta Activation Epoch
No response