[R4R] state verification pipeline #795
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forcodedancing
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Let us use a special hash instead of emptyRoot. |
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* pipeline state verification * update codes and add logs for debug * refactor * update and add logs * refactor * refactor * remove unneeded logs * fix a blocking issue * fix sync issue when force kill * remove logs * refactor based on comments * refactor based on comments * refactor based on comments * refactor based on comments * refactor based on comments * fix a deadlock issue * fix merkle root mismatch issue during sync * refactor based on review comments * remove unnecessary code * remove unnecessary code * refactor based on review comments * change based on comments * refactor * uew dummyRoot to replace emptyRoot * add nil check * add comments * remove unneeded codes * format comments Co-authored-by: forcodedancing <liguo.fudan@gmail.com>
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Description
Improve the performance of block importing by pipelining state verification, which consumes a big portion of time of block importing.
Rationale
In the previous release, the pipecommit feature is well implemented. Following the pipecommit feature, the pr tries to further pipeline state verification, by moving
AccountsIntermediateRootfromValidateStatefunction toCommitfunction.Workflow
Commit Snapshotwill not wait forAccountsIntermediateRoot(thereby the new snapshot data is not correct)Commit Snapshot, needed accounts will be populatedAccountsIntermediateRoot, the snapshot generated will be correctedPerformance
Instances with 8 cores, 64G memory, 2.5T SSD (S1 vs S3)
Importing Time （0.75 quantile)
Before SVP
After SVP (S1 is using SVP)
State Verification Percentage
S3
S1 (S1 is using SVP)
Instances with 16 cores, 64G memory, 7.5T NVME (155 vs 118)
Importing Time （0.75 quantile)
Before SVP
After SVP (155 is using SVP)
State Verification Percentage
118
115 (155 is using SVP)
In general, the performance improvement effect is different on different instance types and different transaction volumes; if there is more time spent on state verification, then the improvement will be more obvious.
Changes
Notable changes:
ValidateState,Commitfunction are changed to support state verification pipeline