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Refactor status cache and remove complex serialize/deserialize (#5335) 

automerge
This commit is contained in:
Sagar Dhawan 2019-08-06 18:47:30 -07:00 committed by Grimes
parent 72e9492ca6
commit 9dcf3347f5
7 changed files with 428 additions and 431 deletions
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233
core/src/bank_forks.rs
View File

@ -57,7 +57,7 @@ pub struct BankForks {
working_bank: Arc<Bank>,
root: u64,
snapshot_config: Option<SnapshotConfig>,
last_snapshot: u64,
slots_since_snapshot: Vec<u64>,
confidence: HashMap<u64, Confidence>,
}
@ -110,7 +110,7 @@ impl BankForks {
working_bank,
root: 0,
snapshot_config: None,
last_snapshot: 0,
slots_since_snapshot: vec![],
confidence: HashMap::new(),
}
}
@ -175,7 +175,7 @@ impl BankForks {
banks,
working_bank,
snapshot_config: None,
last_snapshot: 0,
slots_since_snapshot: vec![],
confidence: HashMap::new(),
}
}
@ -208,26 +208,27 @@ impl BankForks {
.unwrap_or(0);
root_bank.squash();
let new_tx_count = root_bank.transaction_count();
self.prune_non_root(root);
self.slots_since_snapshot.push(root);
// Generate a snapshot if snapshots are configured and it's been an appropriate number
// of banks since the last snapshot
if self.snapshot_config.is_some() {
if self.snapshot_config.is_some() && snapshot_package_sender.is_some() {
let config = self
.snapshot_config
.as_ref()
.expect("Called package_snapshot without a snapshot configuration");
if root - self.last_snapshot >= config.snapshot_interval_slots as u64 {
if root - self.slots_since_snapshot[0] >= config.snapshot_interval_slots as u64 {
let mut snapshot_time = Measure::start("total-snapshot-ms");
let r = self.generate_snapshot(
root,
&self.slots_since_snapshot[1..],
snapshot_package_sender.as_ref().unwrap(),
snapshot_utils::get_snapshot_tar_path(&config.snapshot_package_output_path),
);
if r.is_err() {
warn!("Error generating snapshot for bank: {}, err: {:?}", root, r);
} else {
self.last_snapshot = root;
self.slots_since_snapshot = vec![root];
}
// Cleanup outdated snapshots
@ -237,6 +238,8 @@ impl BankForks {
}
}
self.prune_non_root(root);
inc_new_counter_info!(
"bank-forks_set_root_ms",
timing::duration_as_ms(&set_root_start.elapsed()) as usize
@ -254,10 +257,10 @@ impl BankForks {
fn purge_old_snapshots(&self) {
// Remove outdated snapshots
let config = self.snapshot_config.as_ref().unwrap();
let names = snapshot_utils::get_snapshot_names(&config.snapshot_path);
let num_to_remove = names.len().saturating_sub(MAX_CACHE_ENTRIES);
for old_root in &names[..num_to_remove] {
let r = snapshot_utils::remove_snapshot(*old_root, &config.snapshot_path);
let slot_snapshot_paths = snapshot_utils::get_snapshot_paths(&config.snapshot_path);
let num_to_remove = slot_snapshot_paths.len().saturating_sub(MAX_CACHE_ENTRIES);
for slot_files in &slot_snapshot_paths[..num_to_remove] {
let r = snapshot_utils::remove_snapshot(slot_files.slot, &config.snapshot_path);
if r.is_err() {
warn!("Couldn't remove snapshot at: {:?}", config.snapshot_path);
}
@ -267,6 +270,7 @@ impl BankForks {
fn generate_snapshot<P: AsRef<Path>>(
&self,
root: u64,
slots_since_snapshot: &[u64],
snapshot_package_sender: &SnapshotPackageSender,
tar_output_file: P,
) -> Result<()> {
@ -277,19 +281,17 @@ impl BankForks {
.get(root)
.cloned()
.expect("root must exist in BankForks");
snapshot_utils::add_snapshot(&config.snapshot_path, &bank)?;
snapshot_utils::add_snapshot(&config.snapshot_path, &bank, slots_since_snapshot)?;
// Package the relevant snapshots
let names = snapshot_utils::get_snapshot_names(&config.snapshot_path);
let slot_snapshot_paths = snapshot_utils::get_snapshot_paths(&config.snapshot_path);
// We only care about the last MAX_CACHE_ENTRIES snapshots of roots because
// the status cache of anything older is thrown away by the bank in
// status_cache.prune_roots()
let start = names.len().saturating_sub(MAX_CACHE_ENTRIES);
let start = slot_snapshot_paths.len().saturating_sub(MAX_CACHE_ENTRIES);
let package = snapshot_utils::package_snapshot(
&bank,
&names[start..],
&config.snapshot_path,
&slot_snapshot_paths[start..],
tar_output_file,
)?;
@ -362,9 +364,10 @@ impl BankForks {
let unpacked_accounts_dir = unpack_dir.as_ref().join(TAR_ACCOUNTS_DIR);
let unpacked_snapshots_dir = unpack_dir.as_ref().join(TAR_SNAPSHOTS_DIR);
let snapshot_paths = snapshot_utils::get_snapshot_paths(&unpacked_snapshots_dir);
let bank = snapshot_utils::bank_from_snapshots(
account_paths,
&unpacked_snapshots_dir,
&snapshot_paths,
unpacked_accounts_dir,
)?;
@ -378,34 +381,11 @@ impl BankForks {
copy_options.overwrite = true;
fs_extra::move_items(&paths, snapshot_config.snapshot_path(), &copy_options)?;
/*let mut bank_maps = vec![];
let status_cache_rc = StatusCacheRc::default();
let id = (names[names.len() - 1] + 1) as usize;
let mut bank0 =
Bank::create_with_genesis(&genesis_block, account_paths.clone(), &status_cache_rc, id);
bank0.freeze();
let bank_root = snapshot_utils::load_snapshots(
&names,
&mut bank0,
&mut bank_maps,
&status_cache_rc,
&snapshot_config.snapshot_path,
);
if bank_maps.is_empty() || bank_root.is_none() {
return Err(Error::IO(IOError::new(
ErrorKind::Other,
"no snapshots loaded",
)));
}
let (banks, last_slot) = BankForks::setup_banks(&mut bank_maps, &bank.rc, &status_cache_rc);
let working_bank = banks[&last_slot].clone();*/
let mut banks = HashMap::new();
banks.insert(bank.slot(), bank.clone());
let root = bank.slot();
let names = snapshot_utils::get_snapshot_names(&snapshot_config.snapshot_path);
if names.is_empty() {
let snapshot_paths = snapshot_utils::get_snapshot_paths(&snapshot_config.snapshot_path);
if snapshot_paths.is_empty() {
return Err(Error::IO(IOError::new(
ErrorKind::Other,
"no snapshots found",
@ -416,9 +396,7 @@ impl BankForks {
working_bank: bank,
root,
snapshot_config: None,
last_snapshot: *names
.last()
.expect("untarred snapshot should have at least one snapshot"),
slots_since_snapshot: vec![snapshot_paths.last().unwrap().slot],
confidence: HashMap::new(),
})
}
@ -432,7 +410,7 @@ mod tests {
use crate::snapshot_package::SnapshotPackagerService;
use fs_extra::dir::CopyOptions;
use itertools::Itertools;
use solana_sdk::hash::Hash;
use solana_sdk::hash::{hashv, Hash};
use solana_sdk::pubkey::Pubkey;
use solana_sdk::signature::{Keypair, KeypairUtil};
use solana_sdk::system_transaction;
@ -576,8 +554,14 @@ mod tests {
}
}
#[test]
fn test_bank_forks_snapshot_n() {
// creates banks upto "last_slot" and runs the input function `f` on each bank created
// also marks each bank as root and generates snapshots
// finally tries to restore from the last bank's snapshot and compares the restored bank to the
// `last_slot` bank
fn run_bank_forks_snapshot_n<F>(last_slot: u64, f: F)
where
F: Fn(&mut Bank, &Keypair),
{
solana_logger::setup();
let accounts_dir = TempDir::new().unwrap();
let snapshot_dir = TempDir::new().unwrap();
@ -587,55 +571,107 @@ mod tests {
mint_keypair,
..
} = create_genesis_block(10_000);
for index in 0..4 {
let bank0 = Bank::new_with_paths(
&genesis_block,
Some(accounts_dir.path().to_str().unwrap().to_string()),
);
bank0.freeze();
let mut bank_forks = BankForks::new(0, bank0);
let snapshot_config = SnapshotConfig::new(
PathBuf::from(snapshot_dir.path()),
PathBuf::from(snapshot_output_path.path()),
100,
);
bank_forks.set_snapshot_config(snapshot_config.clone());
let bank0 = bank_forks.get(0).unwrap();
snapshot_utils::add_snapshot(&snapshot_config.snapshot_path, bank0).unwrap();
for forks in 0..index {
let bank = Bank::new_from_parent(&bank_forks[forks], &Pubkey::default(), forks + 1);
let key1 = Keypair::new().pubkey();
let tx = system_transaction::create_user_account(
&mint_keypair,
&key1,
1,
genesis_block.hash(),
);
assert_eq!(bank.process_transaction(&tx), Ok(()));
bank.freeze();
snapshot_utils::add_snapshot(&snapshot_config.snapshot_path, &bank).unwrap();
bank_forks.insert(bank);
}
// Generate a snapshot package for last bank
let last_bank = bank_forks.get(index.saturating_sub(1)).unwrap();
let names: Vec<_> = (0..=index).collect();
let snapshot_package = snapshot_utils::package_snapshot(
last_bank,
&names,
let bank0 = Bank::new_with_paths(
&genesis_block,
Some(accounts_dir.path().to_str().unwrap().to_string()),
);
bank0.freeze();
let mut bank_forks = BankForks::new(0, bank0);
let snapshot_config = SnapshotConfig::new(
PathBuf::from(snapshot_dir.path()),
PathBuf::from(snapshot_output_path.path()),
100,
);
bank_forks.set_snapshot_config(snapshot_config.clone());
let bank0 = bank_forks.get(0).unwrap();
snapshot_utils::add_snapshot(&snapshot_config.snapshot_path, bank0, &vec![]).unwrap();
for slot in 0..last_slot {
let mut bank = Bank::new_from_parent(&bank_forks[slot], &Pubkey::default(), slot + 1);
f(&mut bank, &mint_keypair);
let bank = bank_forks.insert(bank);
// set root to make sure we don't end up with too many account storage entries
// and to allow purging logic on status_cache to kick in
bank_forks.set_root(bank.slot(), &None);
snapshot_utils::add_snapshot(
&snapshot_config.snapshot_path,
snapshot_utils::get_snapshot_tar_path(
&snapshot_config.snapshot_package_output_path,
),
&bank,
&(vec![bank.slot()]),
)
.unwrap();
SnapshotPackagerService::package_snapshots(&snapshot_package).unwrap();
restore_from_snapshot(
bank_forks,
accounts_dir.path().to_str().unwrap().to_string(),
index,
);
}
// Generate a snapshot package for last bank
let last_bank = bank_forks.get(last_slot).unwrap();
let slot_snapshot_paths =
snapshot_utils::get_snapshot_paths(&snapshot_config.snapshot_path);
let snapshot_package = snapshot_utils::package_snapshot(
last_bank,
&slot_snapshot_paths,
snapshot_utils::get_snapshot_tar_path(&snapshot_config.snapshot_package_output_path),
)
.unwrap();
SnapshotPackagerService::package_snapshots(&snapshot_package).unwrap();
restore_from_snapshot(
bank_forks,
accounts_dir.path().to_str().unwrap().to_string(),
last_slot,
);
}
#[test]
fn test_bank_forks_snapshot_n() {
// create banks upto slot 4 and create 1 new account in each bank. test that bank 4 snapshots
// and restores correctly
run_bank_forks_snapshot_n(4, |bank, mint_keypair| {
let key1 = Keypair::new().pubkey();
let tx = system_transaction::create_user_account(
&mint_keypair,
&key1,
1,
bank.last_blockhash(),
);
assert_eq!(bank.process_transaction(&tx), Ok(()));
bank.freeze();
});
}
fn goto_end_of_slot(bank: &mut Bank) {
let mut tick_hash = bank.last_blockhash();
loop {
tick_hash = hashv(&[&tick_hash.as_ref(), &[42]]);
bank.register_tick(&tick_hash);
if tick_hash == bank.last_blockhash() {
bank.freeze();
return;
}
}
}
#[test]
fn test_bank_forks_status_cache_snapshot_n() {
// create banks upto slot 256 while transferring 1 lamport into 2 different accounts each time
// this is done to ensure the AccountStorageEntries keep getting cleaned up as the root moves
// ahead. Also tests the status_cache purge and status cache snapshotting.
// Makes sure that the last bank is restored correctly
let key1 = Keypair::new().pubkey();
let key2 = Keypair::new().pubkey();
run_bank_forks_snapshot_n(256, |bank, mint_keypair| {
let tx = system_transaction::transfer(
&mint_keypair,
&key1,
1,
bank.parent().unwrap().last_blockhash(),
);
assert_eq!(bank.process_transaction(&tx), Ok(()));
let tx = system_transaction::transfer(
&mint_keypair,
&key2,
1,
bank.parent().unwrap().last_blockhash(),
);
assert_eq!(bank.process_transaction(&tx), Ok(()));
goto_end_of_slot(bank);
});
}
#[test]
@ -668,7 +704,7 @@ mod tests {
// Take snapshot of zeroth bank
let bank0 = bank_forks.get(0).unwrap();
snapshot_utils::add_snapshot(&snapshot_config.snapshot_path, bank0).unwrap();
snapshot_utils::add_snapshot(&snapshot_config.snapshot_path, bank0, &vec![]).unwrap();
// Create next MAX_CACHE_ENTRIES + 2 banks and snapshots. Every bank will get snapshotted
// and the snapshot purging logic will run on every snapshot taken. This means the three
@ -715,6 +751,7 @@ mod tests {
bank_forks
.generate_snapshot(
slot,
&vec![],
&package_sender,
snapshot_config
.snapshot_package_output_path
@ -732,10 +769,10 @@ mod tests {
// Purge all the outdated snapshots, including the ones needed to generate the package
// currently sitting in the channel
bank_forks.purge_old_snapshots();
let mut snapshot_names = snapshot_utils::get_snapshot_names(&snapshots_dir);
snapshot_names.sort();
let mut snapshot_paths = snapshot_utils::get_snapshot_paths(&snapshots_dir);
snapshot_paths.sort();
assert_eq!(
snapshot_names,
snapshot_paths.iter().map(|path| path.slot).collect_vec(),
(3..=MAX_CACHE_ENTRIES as u64 + 2).collect_vec()
);

182
core/src/snapshot_utils.rs
View File

@ -3,16 +3,54 @@ use crate::snapshot_package::SnapshotPackage;
use bincode::{deserialize_from, serialize_into};
use flate2::read::GzDecoder;
use solana_runtime::bank::Bank;
use solana_runtime::status_cache::SlotDelta;
use solana_sdk::transaction;
use std::cmp::Ordering;
use std::fs;
use std::fs::File;
use std::io::{BufReader, BufWriter, Error as IOError, ErrorKind};
use std::path::{Path, PathBuf};
use tar::Archive;
pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
const SNAPSHOT_STATUS_CACHE_FILE_NAME: &str = "status_cache";
#[derive(PartialEq, Ord, Eq, Debug)]
pub struct SlotSnapshotPaths {
pub slot: u64,
pub snapshot_file_path: PathBuf,
pub snapshot_status_cache_path: PathBuf,
}
impl PartialOrd for SlotSnapshotPaths {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.slot.cmp(&other.slot))
}
}
impl SlotSnapshotPaths {
fn hardlink_snapshot_directory<P: AsRef<Path>>(&self, snapshot_hardlink_dir: P) -> Result<()> {
// Create a new directory in snapshot_hardlink_dir
let new_slot_hardlink_dir = snapshot_hardlink_dir.as_ref().join(self.slot.to_string());
let _ = fs::remove_dir_all(&new_slot_hardlink_dir);
fs::create_dir_all(&new_slot_hardlink_dir)?;
// Hardlink the snapshot
fs::hard_link(
&self.snapshot_file_path,
&new_slot_hardlink_dir.join(self.slot.to_string()),
)?;
// Hardlink the status cache
fs::hard_link(
&self.snapshot_status_cache_path,
&new_slot_hardlink_dir.join(SNAPSHOT_STATUS_CACHE_FILE_NAME),
)?;
Ok(())
}
}
pub fn package_snapshot<Q: AsRef<Path>>(
bank: &Bank,
snapshot_names: &[u64],
snapshot_dir: P,
snapshot_files: &[SlotSnapshotPaths],
snapshot_package_output_file: Q,
) -> Result<SnapshotPackage> {
let slot = bank.slot();
@ -46,15 +84,15 @@ pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
// Any errors from this point on will cause the above SnapshotPackage to drop, clearing
// any temporary state created for the SnapshotPackage (like the snapshot_hard_links_dir)
for name in snapshot_names {
hardlink_snapshot_directory(&snapshot_dir, &snapshot_hard_links_dir, *name)?;
for files in snapshot_files {
files.hardlink_snapshot_directory(&snapshot_hard_links_dir)?;
}
Ok(package)
}
pub fn get_snapshot_names<P: AsRef<Path>>(snapshot_path: P) -> Vec<u64> {
let paths = fs::read_dir(snapshot_path).expect("Invalid snapshot path");
pub fn get_snapshot_paths<P: AsRef<Path>>(snapshot_path: P) -> Vec<SlotSnapshotPaths> {
let paths = fs::read_dir(&snapshot_path).expect("Invalid snapshot path");
let mut names = paths
.filter_map(|entry| {
entry.ok().and_then(|e| {
@ -64,37 +102,64 @@ pub fn get_snapshot_names<P: AsRef<Path>>(snapshot_path: P) -> Vec<u64> {
.unwrap_or(None)
})
})
.collect::<Vec<u64>>();
.map(|slot| {
let snapshot_path = snapshot_path.as_ref().join(slot.to_string());
SlotSnapshotPaths {
slot,
snapshot_file_path: snapshot_path.join(get_snapshot_file_name(slot)),
snapshot_status_cache_path: snapshot_path.join(SNAPSHOT_STATUS_CACHE_FILE_NAME),
}
})
.collect::<Vec<SlotSnapshotPaths>>();
names.sort();
names
}
pub fn add_snapshot<P: AsRef<Path>>(snapshot_path: P, bank: &Bank) -> Result<()> {
pub fn add_snapshot<P: AsRef<Path>>(
snapshot_path: P,
bank: &Bank,
slots_since_snapshot: &[u64],
) -> Result<()> {
let slot = bank.slot();
// snapshot_path/slot
let slot_snapshot_dir = get_bank_snapshot_dir(snapshot_path, slot);
fs::create_dir_all(slot_snapshot_dir.clone()).map_err(Error::from)?;
// the snapshot is stored as snapshot_path/slot/slot
let snapshot_file_path = slot_snapshot_dir.join(get_snapshot_file_name(slot));
// the status cache is stored as snapshot_path/slot/slot_satus_cache
let snapshot_status_cache_file_path = slot_snapshot_dir.join(SNAPSHOT_STATUS_CACHE_FILE_NAME);
info!(
"creating snapshot {}, path: {:?}",
"creating snapshot {}, path: {:?} status_cache: {:?}",
bank.slot(),
snapshot_file_path
snapshot_file_path,
snapshot_status_cache_file_path
);
let file = File::create(&snapshot_file_path)?;
let mut stream = BufWriter::new(file);
let snapshot_file = File::create(&snapshot_file_path)?;
// snapshot writer
let mut snapshot_stream = BufWriter::new(snapshot_file);
let status_cache = File::create(&snapshot_status_cache_file_path)?;
// status cache writer
let mut status_cache_stream = BufWriter::new(status_cache);
// Create the snapshot
serialize_into(&mut stream, &*bank).map_err(|e| get_io_error(&e.to_string()))?;
serialize_into(&mut stream, &bank.rc).map_err(|e| get_io_error(&e.to_string()))?;
// TODO: Add status cache serialization code
/*serialize_into(&mut stream, &bank.src).map_err(|e| get_io_error(&e.to_string()))?;*/
serialize_into(&mut snapshot_stream, &*bank).map_err(|e| get_io_error(&e.to_string()))?;
serialize_into(&mut snapshot_stream, &bank.rc).map_err(|e| get_io_error(&e.to_string()))?;
// write the status cache
serialize_into(
&mut status_cache_stream,
&bank.src.slot_deltas(slots_since_snapshot),
)
.map_err(|_| get_io_error("serialize bank status cache error"))?;
info!(
"successfully created snapshot {}, path: {:?}",
"successfully created snapshot {}, path: {:?} status_cache: {:?}",
bank.slot(),
snapshot_file_path
snapshot_file_path,
snapshot_status_cache_file_path
);
Ok(())
}
@ -105,25 +170,20 @@ pub fn remove_snapshot<P: AsRef<Path>>(slot: u64, snapshot_path: P) -> Result<()
Ok(())
}
pub fn bank_from_snapshots<P, Q>(
pub fn bank_from_snapshots<P>(
local_account_paths: String,
snapshot_path: P,
append_vecs_path: Q,
snapshot_paths: &[SlotSnapshotPaths],
append_vecs_path: P,
) -> Result<Bank>
where
P: AsRef<Path>,
Q: AsRef<Path>,
{
// Rebuild the last root bank
let names = get_snapshot_names(&snapshot_path);
let last_root = names
let last_root_paths = snapshot_paths
.last()
.ok_or_else(|| get_io_error("No snapshots found in snapshots directory"))?;
let snapshot_file_name = get_snapshot_file_name(*last_root);
let snapshot_dir = get_bank_snapshot_dir(&snapshot_path, *last_root);
let snapshot_file_path = snapshot_dir.join(&snapshot_file_name);
info!("Load from {:?}", snapshot_file_path);
let file = File::open(snapshot_file_path)?;
info!("Load from {:?}", &last_root_paths.snapshot_file_path);
let file = File::open(&last_root_paths.snapshot_file_path)?;
let mut stream = BufReader::new(file);
let bank: Bank = deserialize_from(&mut stream).map_err(|e| get_io_error(&e.to_string()))?;
@ -131,39 +191,15 @@ where
bank.rc
.accounts_from_stream(&mut stream, local_account_paths, append_vecs_path)?;
for bank_slot in names.iter().rev() {
let snapshot_file_name = get_snapshot_file_name(*bank_slot);
let snapshot_dir = get_bank_snapshot_dir(&snapshot_path, *bank_slot);
let snapshot_file_path = snapshot_dir.join(snapshot_file_name.clone());
let file = File::open(snapshot_file_path)?;
let mut stream = BufReader::new(file);
let _bank: Result<Bank> =
deserialize_from(&mut stream).map_err(|e| get_io_error(&e.to_string()));
// merge the status caches from all previous banks
for slot_paths in snapshot_paths.iter().rev() {
let status_cache = File::open(&slot_paths.snapshot_status_cache_path)?;
let mut stream = BufReader::new(status_cache);
let slot_deltas: Vec<SlotDelta<transaction::Result<()>>> = deserialize_from(&mut stream)
.map_err(|_| get_io_error("deserialize root error"))
.unwrap_or_default();
// TODO: Uncomment and deserialize status cache here
/*let status_cache: Result<StatusCacheRc> = deserialize_from(&mut stream)
.map_err(|e| get_io_error(&e.to_string()));
if bank_root.is_some() {
match bank {
Ok(v) => {
if status_cache.is_ok() {
let status_cache = status_cache?;
status_cache_rc.append(&status_cache);
// On the last snapshot, purge all outdated status cache
// entries
if i == names.len() - 1 {
status_cache_rc.purge_roots();
}
}
bank_maps.push((*bank_slot, parent_slot, v));
}
Err(_) => warn!("Load snapshot failed for {}", bank_slot),
}
} else {
warn!("Load snapshot rc failed for {}", bank_slot);
}*/
bank.src.append(&slot_deltas);
}
Ok(bank)
@ -184,28 +220,6 @@ pub fn untar_snapshot_in<P: AsRef<Path>, Q: AsRef<Path>>(
Ok(())
}
fn hardlink_snapshot_directory<P: AsRef<Path>, Q: AsRef<Path>>(
snapshot_dir: P,
snapshot_hardlink_dir: Q,
slot: u64,
) -> Result<()> {
// Create a new directory in snapshot_hardlink_dir
let new_slot_hardlink_dir = snapshot_hardlink_dir.as_ref().join(slot.to_string());
let _ = fs::remove_dir_all(&new_slot_hardlink_dir);
fs::create_dir_all(&new_slot_hardlink_dir)?;
// Hardlink the contents of the directory
let snapshot_file = snapshot_dir
.as_ref()
.join(slot.to_string())
.join(slot.to_string());
fs::hard_link(
&snapshot_file,
&new_slot_hardlink_dir.join(slot.to_string()),
)?;
Ok(())
}
fn get_snapshot_file_name(slot: u64) -> String {
slot.to_string()
}

2
runtime/Cargo.toml
View File

@ -23,7 +23,7 @@ maplit = "1.0.1"
memmap = "0.6.2"
rand = "0.6.5"
rayon = "1.1.0"
serde = "1.0.98"
serde = { version = "1.0.98", features = ["rc"] }
serde_derive = "1.0.98"
serde_json = "1.0.40"
solana-logger = { path = "../logger", version = "0.18.0-pre1" }

2
runtime/benches/status_cache.rs
View File

@ -28,6 +28,6 @@ fn test_statuscache_serialize(bencher: &mut Bencher) {
}
}
bencher.iter(|| {
let _ = serialize(&status_cache).unwrap();
let _ = serialize(&status_cache.slot_deltas(&vec![0])).unwrap();
});
}

2
runtime/src/accounts_index.rs
View File

@ -143,7 +143,7 @@ impl<T: Clone> AccountsIndex<T> {
pub fn add_root(&mut self, fork: Fork) {
assert!(
(self.last_root == 0 && fork == 0) || (fork > self.last_root),
(self.last_root == 0 && fork == 0) || (fork >= self.last_root),
"new roots must be increasing"
);
self.last_root = fork;

90
runtime/src/bank.rs
View File

@ -16,10 +16,10 @@ use crate::serde_utils::{
deserialize_atomicbool, deserialize_atomicusize, serialize_atomicbool, serialize_atomicusize,
};
use crate::stakes::Stakes;
use crate::status_cache::StatusCache;
use crate::status_cache::{SlotDelta, StatusCache};
use crate::storage_utils;
use crate::storage_utils::StorageAccounts;
use bincode::{deserialize_from, serialize_into, serialized_size};
use bincode::{deserialize_from, serialize_into};
use byteorder::{ByteOrder, LittleEndian};
use log::*;
use serde::{Deserialize, Serialize};
@ -40,11 +40,10 @@ use solana_sdk::sysvar::{
clock, fees, rewards,
slot_hashes::{self, SlotHashes},
};
use solana_sdk::timing::{duration_as_ns, get_segment_from_slot, MAX_RECENT_BLOCKHASHES};
use solana_sdk::timing::{duration_as_ns, get_segment_from_slot, Slot, MAX_RECENT_BLOCKHASHES};
use solana_sdk::transaction::{Result, Transaction, TransactionError};
use std::cmp;
use std::collections::HashMap;
use std::fmt;
use std::io::{BufReader, Cursor, Error as IOError, Read};
use std::path::Path;
use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
@ -120,65 +119,15 @@ pub struct StatusCacheRc {
status_cache: Arc<RwLock<BankStatusCache>>,
}
impl Serialize for StatusCacheRc {
fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
where
S: serde::ser::Serializer,
{
use serde::ser::Error;
let len = serialized_size(&*self.status_cache).unwrap();
let mut buf = vec![0u8; len as usize];
let mut wr = Cursor::new(&mut buf[..]);
{
let mut status_cache = self.status_cache.write().unwrap();
serialize_into(&mut wr, &*status_cache).map_err(Error::custom)?;
status_cache.merge_caches();
}
let len = wr.position() as usize;
serializer.serialize_bytes(&wr.into_inner()[..len])
}
}
struct StatusCacheRcVisitor;
impl<'a> serde::de::Visitor<'a> for StatusCacheRcVisitor {
type Value = StatusCacheRc;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("Expecting StatusCacheRc")
}
#[allow(clippy::mutex_atomic)]
fn visit_bytes<E>(self, data: &[u8]) -> std::result::Result<Self::Value, E>
where
E: serde::de::Error,
{
use serde::de::Error;
let mut rd = Cursor::new(&data[..]);
let status_cache: BankStatusCache = deserialize_from(&mut rd).map_err(Error::custom)?;
Ok(StatusCacheRc {
status_cache: Arc::new(RwLock::new(status_cache)),
})
}
}
impl<'de> Deserialize<'de> for StatusCacheRc {
fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
where
D: ::serde::Deserializer<'de>,
{
deserializer.deserialize_bytes(StatusCacheRcVisitor)
}
}
impl StatusCacheRc {
pub fn append(&self, status_cache_rc: &StatusCacheRc) {
let sc = status_cache_rc.status_cache.write().unwrap();
self.status_cache.write().unwrap().append(&sc);
pub fn slot_deltas(&self, slots: &[Slot]) -> Vec<SlotDelta<Result<()>>> {
let sc = self.status_cache.read().unwrap();
sc.slot_deltas(slots)
}
pub fn purge_roots(&self) {
self.status_cache.write().unwrap().purge_roots();
pub fn append(&self, slot_deltas: &[SlotDelta<Result<()>>]) {
let mut sc = self.status_cache.write().unwrap();
sc.append(slot_deltas);
}
}
@ -554,20 +503,22 @@ impl Bank {
pub fn squash(&self) {
self.freeze();
let parents = self.parents();
//this bank and all its parents are now on the rooted path
let mut roots = vec![self.slot()];
roots.append(&mut self.parents().iter().map(|p| p.slot()).collect());
*self.rc.parent.write().unwrap() = None;
let mut squash_accounts_time = Measure::start("squash_accounts_time");
for p in parents.iter().rev() {
for slot in roots.iter().rev() {
// root forks cannot be purged
self.rc.accounts.add_root(p.slot());
self.rc.accounts.add_root(*slot);
}
squash_accounts_time.stop();
let mut squash_cache_time = Measure::start("squash_cache_time");
parents
roots
.iter()
.for_each(|p| self.src.status_cache.write().unwrap().add_root(p.slot()));
.for_each(|slot| self.src.status_cache.write().unwrap().add_root(*slot));
squash_cache_time.stop();
datapoint_info!(
@ -1472,9 +1423,9 @@ impl Bank {
assert_eq!(*bhq, *dbhq);
// TODO: Uncomment once status cache serialization is done
/*let sc = self.src.status_cache.read().unwrap();
let sc = self.src.status_cache.read().unwrap();
let dsc = dbank.src.status_cache.read().unwrap();
assert_eq!(*sc, *dsc);*/
assert_eq!(*sc, *dsc);
assert_eq!(
self.rc.accounts.hash_internal_state(self.slot),
dbank.rc.accounts.hash_internal_state(dbank.slot)
@ -2414,7 +2365,10 @@ mod tests {
let bank3 = Arc::new(Bank::new_from_parent(&bank1, &Pubkey::default(), 3));
bank1.squash();
assert_eq!(bank0.get_balance(&key1.pubkey()), 1);
// This picks up the values from 1 which is the highest root:
// TODO: if we need to access rooted banks older than this,
// need to fix the lookup.
assert_eq!(bank0.get_balance(&key1.pubkey()), 4);
assert_eq!(bank3.get_balance(&key1.pubkey()), 4);
assert_eq!(bank2.get_balance(&key1.pubkey()), 3);
bank3.squash();

348
runtime/src/status_cache.rs
View File

@ -1,75 +1,93 @@
use log::*;
use rand::{thread_rng, Rng};
use serde::ser::SerializeSeq;
use serde::{Deserialize, Serialize};
use serde::Serialize;
use solana_sdk::hash::Hash;
use solana_sdk::signature::Signature;
use solana_sdk::timing::Slot;
use std::collections::{HashMap, HashSet};
use std::sync::{Arc, Mutex};
pub const MAX_CACHE_ENTRIES: usize = solana_sdk::timing::MAX_HASH_AGE_IN_SECONDS;
const CACHED_SIGNATURE_SIZE: usize = 20;
// Store forks in a single chunk of memory to avoid another lookup.
pub type ForkId = u64;
pub type ForkStatus<T> = Vec<(ForkId, T)>;
pub type ForkStatus<T> = Vec<(Slot, T)>;
type SignatureSlice = [u8; CACHED_SIGNATURE_SIZE];
type SignatureMap<T> = HashMap<SignatureSlice, ForkStatus<T>>;
type StatusMap<T> = HashMap<Hash, (ForkId, usize, SignatureMap<T>)>;
// Map of Hash and signature status
pub type SignatureStatus<T> = Arc<Mutex<HashMap<Hash, (usize, Vec<(SignatureSlice, T)>)>>>;
// A Map of hash + the highest fork it's been observed on along with
// the signature offset and a Map of the signature slice + Fork status for that signature
type StatusMap<T> = HashMap<Hash, (Slot, usize, SignatureMap<T>)>;
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
// A map of signatures recorded in each fork; used to serialize for snapshots easily.
// Doesn't store a `SlotDelta` in it because the bool `root` is usually set much later
type SlotDeltaMap<T> = HashMap<Slot, SignatureStatus<T>>;
// The signature statuses added during a slot, can be used to build on top of a status cache or to
// construct a new one. Usually derived from a status cache's `SlotDeltaMap`
pub type SlotDelta<T> = (Slot, bool, SignatureStatus<T>);
#[derive(Clone, Debug)]
pub struct StatusCache<T: Serialize + Clone> {
/// all signatures seen during a hash period
#[serde(serialize_with = "serialize_statusmap")]
cache: Vec<StatusMap<T>>,
roots: HashSet<ForkId>,
}
fn serialize_statusmap<S, T: Serialize>(x: &[StatusMap<T>], s: S) -> Result<S::Ok, S::Error>
where
T: serde::Serialize + Clone,
S: serde::Serializer,
{
let cache0: StatusMap<T> = HashMap::new();
let mut seq = s.serialize_seq(Some(x.len()))?;
seq.serialize_element(&cache0)?;
seq.serialize_element(&x[1])?;
seq.end()
cache: StatusMap<T>,
roots: HashSet<Slot>,
/// all signatures seen during a fork/slot
slot_deltas: SlotDeltaMap<T>,
}
impl<T: Serialize + Clone> Default for StatusCache<T> {
fn default() -> Self {
Self {
cache: vec![HashMap::default(); 2],
roots: HashSet::default(),
cache: HashMap::default(),
// 0 is always a root
roots: [0].iter().cloned().collect(),
slot_deltas: HashMap::default(),
}
}
}
impl<T: Serialize + Clone + PartialEq> PartialEq for StatusCache<T> {
fn eq(&self, other: &Self) -> bool {
self.roots == other.roots
&& self.cache.iter().all(|(hash, (slot, sig_index, sig_map))| {
if let Some((other_slot, other_sig_index, other_sig_map)) = other.cache.get(hash) {
if slot == other_slot && sig_index == other_sig_index {
return sig_map.iter().all(|(slice, fork_map)| {
if let Some(other_fork_map) = other_sig_map.get(slice) {
// all this work just to compare the highest forks in the fork map
// per signature
return fork_map.last() == other_fork_map.last();
}
false
});
}
}
false
})
}
}
impl<T: Serialize + Clone> StatusCache<T> {
/// Check if the signature from a transaction is in any of the forks in the ancestors set.
pub fn get_signature_status(
&self,
sig: &Signature,
transaction_blockhash: &Hash,
ancestors: &HashMap<ForkId, usize>,
) -> Option<(ForkId, T)> {
for cache in self.cache.iter() {
let map = cache.get(transaction_blockhash);
if map.is_none() {
continue;
}
let (_, index, sigmap) = map.unwrap();
let mut sig_slice = [0u8; CACHED_SIGNATURE_SIZE];
sig_slice.clone_from_slice(&sig.as_ref()[*index..*index + CACHED_SIGNATURE_SIZE]);
if let Some(stored_forks) = sigmap.get(&sig_slice) {
let res = stored_forks
.iter()
.filter(|(f, _)| ancestors.get(f).is_some() || self.roots.get(f).is_some())
.nth(0)
.cloned();
if res.is_some() {
return res;
}
ancestors: &HashMap<Slot, usize>,
) -> Option<(Slot, T)> {
let map = self.cache.get(transaction_blockhash)?;
let (_, index, sigmap) = map;
let mut sig_slice = [0u8; CACHED_SIGNATURE_SIZE];
sig_slice.clone_from_slice(&sig.as_ref()[*index..*index + CACHED_SIGNATURE_SIZE]);
if let Some(stored_forks) = sigmap.get(&sig_slice) {
let res = stored_forks
.iter()
.filter(|(f, _)| ancestors.get(f).is_some() || self.roots.get(f).is_some())
.nth(0)
.cloned();
if res.is_some() {
return res;
}
}
None
@ -79,14 +97,13 @@ impl<T: Serialize + Clone> StatusCache<T> {
pub fn get_signature_status_slow(
&self,
sig: &Signature,
ancestors: &HashMap<ForkId, usize>,
ancestors: &HashMap<Slot, usize>,
) -> Option<(usize, T)> {
trace!("get_signature_status_slow");
let mut keys = vec![];
for cache in self.cache.iter() {
let mut val: Vec<_> = cache.iter().map(|(k, _)| *k).collect();
keys.append(&mut val);
}
let mut val: Vec<_> = self.cache.iter().map(|(k, _)| *k).collect();
keys.append(&mut val);
for blockhash in keys.iter() {
trace!("get_signature_status_slow: trying {}", blockhash);
if let Some((forkid, res)) = self.get_signature_status(sig, blockhash, ancestors) {
@ -102,99 +119,122 @@ impl<T: Serialize + Clone> StatusCache<T> {
/// Add a known root fork. Roots are always valid ancestors.
/// After MAX_CACHE_ENTRIES, roots are removed, and any old signatures are cleared.
pub fn add_root(&mut self, fork: ForkId) {
pub fn add_root(&mut self, fork: Slot) {
self.roots.insert(fork);
self.purge_roots();
}
/// Insert a new signature for a specific fork.
pub fn insert(&mut self, transaction_blockhash: &Hash, sig: &Signature, fork: ForkId, res: T) {
/// Insert a new signature for a specific slot.
pub fn insert(&mut self, transaction_blockhash: &Hash, sig: &Signature, slot: Slot, res: T) {
let sig_index: usize;
if let Some(sig_map) = self.cache[0].get(transaction_blockhash) {
if let Some(sig_map) = self.cache.get(transaction_blockhash) {
sig_index = sig_map.1;
} else {
sig_index =
thread_rng().gen_range(0, std::mem::size_of::<Hash>() - CACHED_SIGNATURE_SIZE);
}
let sig_map = self.cache[1].entry(*transaction_blockhash).or_insert((
fork,
sig_index,
HashMap::new(),
));
sig_map.0 = std::cmp::max(fork, sig_map.0);
let sig_map =
self.cache
.entry(*transaction_blockhash)
.or_insert((slot, sig_index, HashMap::new()));
sig_map.0 = std::cmp::max(slot, sig_map.0);
let index = sig_map.1;
let mut sig_slice = [0u8; CACHED_SIGNATURE_SIZE];
sig_slice.clone_from_slice(&sig.as_ref()[index..index + CACHED_SIGNATURE_SIZE]);
let sig_forks = sig_map.2.entry(sig_slice).or_insert_with(|| vec![]);
sig_forks.push((fork, res));
self.insert_with_slice(transaction_blockhash, slot, sig_index, sig_slice, res);
}
pub fn purge_roots(&mut self) {
if self.roots.len() > MAX_CACHE_ENTRIES {
if let Some(min) = self.roots.iter().min().cloned() {
self.roots.remove(&min);
for cache in self.cache.iter_mut() {
cache.retain(|_, (fork, _, _)| *fork > min);
}
self.cache.retain(|_, (fork, _, _)| *fork > min);
self.slot_deltas.retain(|slot, _| *slot > min);
}
}
}
fn insert_entry(
&mut self,
transaction_blockhash: &Hash,
sig_slice: &[u8; CACHED_SIGNATURE_SIZE],
status: Vec<(ForkId, T)>,
index: usize,
) {
let fork = status
.iter()
.fold(0, |acc, (f, _)| if acc > *f { acc } else { *f });
let sig_map =
self.cache[0]
.entry(*transaction_blockhash)
.or_insert((fork, index, HashMap::new()));
sig_map.0 = std::cmp::max(fork, sig_map.0);
let sig_forks = sig_map.2.entry(*sig_slice).or_insert_with(|| vec![]);
sig_forks.extend(status);
}
/// Clear for testing
pub fn clear_signatures(&mut self) {
for cache in self.cache.iter_mut() {
for v in cache.values_mut() {
v.2 = HashMap::new();
for v in self.cache.values_mut() {
v.2 = HashMap::new();
}
self.slot_deltas
.iter_mut()
.for_each(|(_, status)| status.lock().unwrap().clear());
}
// returns the signature statuses for each slot in the slots provided
pub fn slot_deltas(&self, slots: &[Slot]) -> Vec<SlotDelta<T>> {
let empty = Arc::new(Mutex::new(HashMap::new()));
slots
.iter()
.map(|slot| {
(
*slot,
self.roots.contains(slot),
self.slot_deltas.get(slot).unwrap_or_else(|| &empty).clone(),
)
})
.collect()
}
// replay deltas into a status_cache allows "appending" data
pub fn append(&mut self, slot_deltas: &[SlotDelta<T>]) {
for (slot, is_root, statuses) in slot_deltas {
statuses
.lock()
.unwrap()
.iter()
.for_each(|(tx_hash, (sig_index, statuses))| {
for (sig_slice, res) in statuses.iter() {
self.insert_with_slice(&tx_hash, *slot, *sig_index, *sig_slice, res.clone())
}
});
if *is_root {
self.add_root(*slot);
}
}
}
pub fn append(&mut self, status_cache: &StatusCache<T>) {
for (hash, sigmap) in status_cache.cache[1].iter() {
for (signature, fork_status) in sigmap.2.iter() {
self.insert_entry(hash, signature, fork_status.clone(), sigmap.1);
}
}
self.roots = self.roots.union(&status_cache.roots).cloned().collect();
pub fn from_slot_deltas(slot_deltas: &[SlotDelta<T>]) -> Self {
// play all deltas back into the the status cache
let mut me = Self::default();
me.append(slot_deltas);
me
}
pub fn merge_caches(&mut self) {
let mut cache = HashMap::new();
std::mem::swap(&mut cache, &mut self.cache[1]);
for (hash, sigmap) in cache.iter() {
for (signature, fork_status) in sigmap.2.iter() {
self.insert_entry(hash, signature, fork_status.clone(), sigmap.1);
}
}
fn insert_with_slice(
&mut self,
transaction_blockhash: &Hash,
slot: Slot,
sig_index: usize,
sig_slice: [u8; CACHED_SIGNATURE_SIZE],
res: T,
) {
let sig_map =
self.cache
.entry(*transaction_blockhash)
.or_insert((slot, sig_index, HashMap::new()));
sig_map.0 = std::cmp::max(slot, sig_map.0);
let sig_forks = sig_map.2.entry(sig_slice).or_insert_with(|| vec![]);
sig_forks.push((slot, res.clone()));
let slot_deltas = self.slot_deltas.entry(slot).or_default();
let mut fork_entry = slot_deltas.lock().unwrap();
let (_, hash_entry) = fork_entry
.entry(*transaction_blockhash)
.or_insert((sig_index, vec![]));
hash_entry.push((sig_slice, res))
}
}
#[cfg(test)]
mod tests {
use super::*;
use bincode::{deserialize_from, serialize_into, serialized_size};
use solana_sdk::hash::hash;
use std::io::Cursor;
type BankStatusCache = StatusCache<()>;
@ -236,7 +276,7 @@ mod tests {
let mut status_cache = BankStatusCache::default();
let blockhash = hash(Hash::default().as_ref());
let ancestors = HashMap::new();
status_cache.insert(&blockhash, &sig, 0, ());
status_cache.insert(&blockhash, &sig, 1, ());
assert_eq!(
status_cache.get_signature_status(&sig, &blockhash, &ancestors),
None
@ -347,91 +387,43 @@ mod tests {
let blockhash = hash(Hash::default().as_ref());
status_cache.clear_signatures();
status_cache.insert(&blockhash, &sig, 0, ());
let (_, index, sig_map) = status_cache.cache[1].get(&blockhash).unwrap();
let (_, index, sig_map) = status_cache.cache.get(&blockhash).unwrap();
let mut sig_slice = [0u8; CACHED_SIGNATURE_SIZE];
sig_slice.clone_from_slice(&sig.as_ref()[*index..*index + CACHED_SIGNATURE_SIZE]);
assert!(sig_map.get(&sig_slice).is_some());
}
#[test]
fn test_statuscache_append() {
fn test_slot_deltas() {
let sig = Signature::default();
let mut status_cache0 = BankStatusCache::default();
let blockhash0 = hash(Hash::new(&vec![0; 32]).as_ref());
status_cache0.add_root(0);
status_cache0.insert(&blockhash0, &sig, 0, ());
let sig = Signature::default();
let mut status_cache1 = BankStatusCache::default();
let blockhash1 = hash(Hash::new(&vec![1; 32]).as_ref());
status_cache1.insert(&blockhash0, &sig, 1, ());
status_cache1.add_root(1);
status_cache1.insert(&blockhash1, &sig, 1, ());
status_cache0.append(&status_cache1);
let roots: HashSet<_> = [0, 1].iter().cloned().collect();
assert_eq!(status_cache0.roots, roots);
let ancestors = vec![(0, 1), (1, 1)].into_iter().collect();
assert!(status_cache0
.get_signature_status(&sig, &blockhash0, &ancestors)
.is_some());
assert!(status_cache0
.get_signature_status(&sig, &blockhash1, &ancestors)
.is_some());
}
fn test_serialize(sc: &mut BankStatusCache, blockhash: Vec<Hash>, sig: &Signature) {
let len = serialized_size(&sc).unwrap();
let mut buf = vec![0u8; len as usize];
let mut writer = Cursor::new(&mut buf[..]);
let cache0 = sc.cache[0].clone();
serialize_into(&mut writer, sc).unwrap();
for hash in blockhash.iter() {
if let Some(map0) = sc.cache[0].get(hash) {
if let Some(map1) = sc.cache[1].get(hash) {
assert_eq!(map0.1, map1.1);
}
}
}
sc.merge_caches();
let len = writer.position() as usize;
let mut reader = Cursor::new(&mut buf[..len]);
let mut status_cache: BankStatusCache = deserialize_from(&mut reader).unwrap();
status_cache.cache[0] = cache0;
status_cache.merge_caches();
assert!(status_cache.cache[0].len() > 0);
assert!(status_cache.cache[1].is_empty());
let ancestors = vec![(0, 1), (1, 1)].into_iter().collect();
assert_eq!(*sc, status_cache);
for hash in blockhash.iter() {
assert!(status_cache
.get_signature_status(&sig, &hash, &ancestors)
.is_some());
}
let mut status_cache = BankStatusCache::default();
let blockhash = hash(Hash::default().as_ref());
status_cache.clear_signatures();
status_cache.insert(&blockhash, &sig, 0, ());
let slot_deltas = status_cache.slot_deltas(&[0]);
let cache = StatusCache::from_slot_deltas(&slot_deltas);
assert_eq!(cache, status_cache);
let slot_deltas = cache.slot_deltas(&[0]);
let cache = StatusCache::from_slot_deltas(&slot_deltas);
assert_eq!(cache, status_cache);
}
#[test]
fn test_statuscache_serialize() {
fn test_roots_deltas() {
let sig = Signature::default();
let mut status_cache = BankStatusCache::default();
let blockhash0 = hash(Hash::new(&vec![0; 32]).as_ref());
status_cache.add_root(0);
status_cache.clear_signatures();
status_cache.insert(&blockhash0, &sig, 0, ());
test_serialize(&mut status_cache, vec![blockhash0], &sig);
status_cache.insert(&blockhash0, &sig, 1, ());
test_serialize(&mut status_cache, vec![blockhash0], &sig);
let blockhash1 = hash(Hash::new(&vec![1; 32]).as_ref());
status_cache.insert(&blockhash1, &sig, 1, ());
test_serialize(&mut status_cache, vec![blockhash0, blockhash1], &sig);
let blockhash2 = hash(Hash::new(&vec![2; 32]).as_ref());
let ancestors = vec![(0, 1), (1, 1)].into_iter().collect();
assert!(status_cache
.get_signature_status(&sig, &blockhash2, &ancestors)
.is_none());
let blockhash = hash(Hash::default().as_ref());
let blockhash2 = hash(blockhash.as_ref());
status_cache.insert(&blockhash, &sig, 0, ());
status_cache.insert(&blockhash, &sig, 1, ());
status_cache.insert(&blockhash2, &sig, 1, ());
for i in 0..(MAX_CACHE_ENTRIES + 1) {
status_cache.add_root(i as u64);
}
let slots: Vec<_> = (0_u64..MAX_CACHE_ENTRIES as u64 + 1).collect();
let slot_deltas = status_cache.slot_deltas(&slots);
let cache = StatusCache::from_slot_deltas(&slot_deltas);
assert_eq!(cache, status_cache);
}
}