ba4dfa7172
Move //pkg/gate.Gate to //pkg/sync.
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- Use atomic add rather than CAS in every Gate method, which is slightly
faster in most cases.
- Implement Close wakeup using gopark/goready to avoid channel allocation.
New benchmarks:
name old time/op new time/op delta
GateEnterLeave-12 16.7ns ± 1% 10.3ns ± 1% -38.44% (p=0.000 n=9+8)
GateClose-12 50.2ns ± 8% 42.4ns ± 6% -15.44% (p=0.000 n=10+10)
GateEnterLeaveAsyncClose-12 972ns ± 2% 640ns ± 7% -34.15% (p=0.000 n=9+10)
PiperOrigin-RevId: 359336344
2021-02-24 11:56:56 -08:00
f80a857a4f
Bump build constraints to Go 1.18
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These are bumped to allow early testing of Go 1.17. Use will be audited closer
to the 1.17 release.
PiperOrigin-RevId: 358278615
2021-02-18 15:30:58 -08:00
aaf4901c8c
Add //pkg/sync:generic_atomicptrmap.
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AtomicPtrMap is a generic concurrent map from arbitrary keys to arbitrary
pointer values.
Benchmarks:
name time/op
StoreDelete/RWMutexMap-12 335ns ± 1%
StoreDelete/SyncMap-12 705ns ± 3%
StoreDelete/AtomicPtrMap-12 287ns ± 4%
StoreDelete/AtomicPtrMapSharded-12 289ns ± 1%
LoadOrStoreDelete/RWMutexMap-12 342ns ± 2%
LoadOrStoreDelete/SyncMap-12 662ns ± 2%
LoadOrStoreDelete/AtomicPtrMap-12 290ns ± 7%
LoadOrStoreDelete/AtomicPtrMapSharded-12 293ns ± 2%
LookupPositive/RWMutexMap-12 101ns ±26%
LookupPositive/SyncMap-12 202ns ± 2%
LookupPositive/AtomicPtrMap-12 71.1ns ± 2%
LookupPositive/AtomicPtrMapSharded-12 73.2ns ± 1%
LookupNegative/RWMutexMap-12 119ns ± 1%
LookupNegative/SyncMap-12 154ns ± 1%
LookupNegative/AtomicPtrMap-12 84.7ns ± 3%
LookupNegative/AtomicPtrMapSharded-12 86.8ns ± 1%
Concurrent/FixedKeys_1PercentWrites_RWMutexMap-12 1.32µs ± 2%
Concurrent/FixedKeys_1PercentWrites_SyncMap-12 52.7ns ±10%
Concurrent/FixedKeys_1PercentWrites_AtomicPtrMap-12 31.8ns ±20%
Concurrent/FixedKeys_1PercentWrites_AtomicPtrMapSharded-12 24.0ns ±15%
Concurrent/FixedKeys_10PercentWrites_RWMutexMap-12 860ns ± 3%
Concurrent/FixedKeys_10PercentWrites_SyncMap-12 68.8ns ±20%
Concurrent/FixedKeys_10PercentWrites_AtomicPtrMap-12 98.6ns ± 7%
Concurrent/FixedKeys_10PercentWrites_AtomicPtrMapSharded-12 42.0ns ±25%
Concurrent/FixedKeys_50PercentWrites_RWMutexMap-12 1.17µs ± 3%
Concurrent/FixedKeys_50PercentWrites_SyncMap-12 136ns ±34%
Concurrent/FixedKeys_50PercentWrites_AtomicPtrMap-12 286ns ± 3%
Concurrent/FixedKeys_50PercentWrites_AtomicPtrMapSharded-12 115ns ±35%
Concurrent/ChangingKeys_1PercentWrites_RWMutexMap-12 1.27µs ± 2%
Concurrent/ChangingKeys_1PercentWrites_SyncMap-12 5.01µs ± 3%
Concurrent/ChangingKeys_1PercentWrites_AtomicPtrMap-12 38.1ns ± 3%
Concurrent/ChangingKeys_1PercentWrites_AtomicPtrMapSharded-12 22.6ns ± 2%
Concurrent/ChangingKeys_10PercentWrites_RWMutexMap-12 1.08µs ± 2%
Concurrent/ChangingKeys_10PercentWrites_SyncMap-12 5.97µs ± 1%
Concurrent/ChangingKeys_10PercentWrites_AtomicPtrMap-12 390ns ± 2%
Concurrent/ChangingKeys_10PercentWrites_AtomicPtrMapSharded-12 93.6ns ± 1%
Concurrent/ChangingKeys_50PercentWrites_RWMutexMap-12 1.77µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_SyncMap-12 8.07µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_AtomicPtrMap-12 1.61µs ± 2%
Concurrent/ChangingKeys_50PercentWrites_AtomicPtrMapSharded-12 386ns ± 1%
Updates #231
PiperOrigin-RevId: 346614776
2020-12-09 15:57:02 -08:00
ed8bdf461b
Consolidate most synchronization primitive linknames in the sync package.
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PiperOrigin-RevId: 345359823
2020-12-02 19:08:32 -08:00
Jamie Liu
Michael Pratt