A VoteAccount may only wrap an account if the account owner is
solana_vote_program:id or equivalently this check returns true:
solana_vote_program::check_id(account.owner())
In addition to thread_local -> lazy_static change, a number of thread-pools are
initialized with get_max_thread_count to achieve parity with the older code in
terms of number of validator threads.
#### Problem
blockstore_db.rs becomes bigger.
#### Summary of Changes
Move BlockstoreRocksDbColumnFamilyMetrics to blockstore_metric.rs out from blockstore_db.rs.
#### Problem
blockstore_db.rs becomes bigger.
#### Summary of Changes
Move trait ColumnMetrics and metric-macros to blockstore_metric.rs out from blockstore_db.rs.
#### Problem
blockstore_db.rs becomes bigger.
#### Summary of Changes
This PR creates blockstore_metric.rs and moves metric-related functions out from blockstore_db.rs.
In preparation of the upcoming changes to shred struct, the added
hard-coded tests in this commit ensure that shreds are backward
compatible when serialized and de-serialized.
#### Summary of Changes
This PR replaces the use of thread_rng in RocksDB perf metric samples by
AtomicU32 with Ordering::Relaxed to improve the performance of determining
whether to sample the current RocksDB's read/write perf metric.
The extra wrapping and indirection by the Session struct is not used in
any form. The commit removes Session and instead uses Reed-Solomon
constructs directly.
#### Problem
Currently, the number of RocksDB perf samples is controlled by an env arg
which is later handled using a lazy_static variable. However, there is a known
performance overhead of using lazy_static as mentioned in
https://github.com/solana-labs/solana/pull/6472.
#### Summary of Changes
Instead, this PR uses a hidden validator argument, --rocksdb-perf-sample-interval,
for controlling how often RocksDB read/write performance sample is collected.
Removed Default implementation for ShredType. ShredType should always be
explicitly specified, and not rely on default values.
Simplified single-arg Shred Error variants to use shorter syntax.
Renamed erasure blocks to shards, to be consistent with reed_solomon
crate and not to confuse with FEC blocks.
#### Problem
The RocksDB wrapper,`Rocks`, under blockstore_db is currently implemented
as a tuple with unnamed fields. Accessing its fields requires syntax like `self.0`
which limits readability.
#### Summary of Changes
This PR converts Rocks from tuple to struct so that it has more human-readable
fields.
Shred::new_empty_data_shred returns an invalid shred (i.e.
shred.sanitize() returns error). The method is only used in tests and
can be easily replaced with Shred::new_from_data. To keep the shred api
surface small, this commit removes this method.
* nonblocking send when when droping banks
* detect and report drop signal queue full/disconnect events
* comments
* use counter for reporting bank_drop_queue events
* reduce log
* use datapoint to report stats
* logging instead of reporting bank drop signal full
* fix a corner case for reporting
* fix build
#### Problem
Currently, even if SOLANA_METRICS_ROCKSDB_PERF_SAMPLES_IN_1K == 0, we are still doing
the sampling check for every RocksDB read.
```
thread_rng().gen_range(0, METRIC_SAMPLES_1K) > *ROCKSDB_PERF_CONTEXT_SAMPLES_IN_1K
```
#### Summary of Changes
This PR skips the sampling check when SOLANA_METRICS_ROCKSDB_PERF_SAMPLES_IN_1K
is set to 0.