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balance rates of draining and importing

This commit is contained in:
Robert Habermeier 2016-10-05 12:10:28 +02:00
parent abbf3b3c58
commit 8a5576d133
1 changed files with 11 additions and 3 deletions
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14
ethcore/src/verification/queue/mod.rs
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@ -154,6 +154,7 @@ struct Verification<K: Kind> {
empty: SMutex<()>,
verified_count: AtomicUsize,
drained: AtomicUsize,
imported: AtomicUsize,
}
impl<K: Kind> VerificationQueue<K> {
@ -168,6 +169,7 @@ impl<K: Kind> VerificationQueue<K> {
empty: SMutex::new(()),
verified_count: AtomicUsize::new(0),
drained: AtomicUsize::new(0),
imported: AtomicUsize::new(0),
});
let more_to_verify = Arc::new(SCondvar::new());
let deleting = Arc::new(AtomicBool::new(false));
@ -345,6 +347,7 @@ impl<K: Kind> VerificationQueue<K> {
Ok(item) => {
self.processing.write().insert(h.clone());
self.verification.unverified.lock().push_back(item);
self.verification.imported.fetch_add(1, AtomicOrdering::AcqRel);
self.more_to_verify.notify_all();
Ok(h)
},
@ -463,9 +466,14 @@ impl<K: Kind> VerificationQueue<K> {
let v_count = self.verification.verified_count.load(AtomicOrdering::Acquire);
let drained = self.verification.drained.load(AtomicOrdering::Acquire);
let imported = self.verification.imported.load(AtomicOrdering::Acquire);
self.verification.verified_count.store(0, AtomicOrdering::Release);
self.verification.drained.store(0, AtomicOrdering::Release);
self.verification.imported.store(0, AtomicOrdering::Release);
// select which side of the queue is the bottleneck.
let target = min(drained, imported);
// compute the average rate of verification per thread and determine
// how many are necessary to match the rate of draining.
@ -474,11 +482,11 @@ impl<K: Kind> VerificationQueue<K> {
let needed = if v_count < 20 {
1
} else {
(drained as f64 / v_count_per as f64).ceil() as usize
(target as f64 / v_count_per as f64).ceil() as usize
};
trace!(target: "verification", "v_rate_per={}, drained={}, scaling to {} verifiers",
v_count_per, drained, needed);
trace!(target: "verification", "v_rate_per={}, target={}, scaling to {} verifiers",
v_count_per, target, needed);
for _ in num_verifiers..needed {
self.add_verifier();