[SR-11854] OperationQueue not asynchronous
swift-ci opened this issue · comments
| Previous ID | SR-11854 |
| Radar | rdar://problem/57549294 |
| Original Reporter | ZakMcK (JIRA User) |
| Type | Bug |
| Status | Resolved |
| Resolution | Done |
Attachment: Download
Environment
Swift Runtime
Swift version 5.1 (swift-5.1.2-RELEASE)
Target: x86_64-unknown-linux-gnu
OS
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Foundation, libdispatch |
| Labels | Bug |
| Assignee | @lxbndr |
| Priority | Medium |
md5: 7ac99bf05c7d6c768f6910f21d555ebb
Issue Description:
I have a problem with the OperationQueue in the swift-5.1.2-RELEASE version. The whole OperationQueue seems to work synchronously with one single thread instead of using all available cores.
This worked with swift 5.0. Following example
let testQueue = OperationQueue()
testQueue.name = "TestAsync"
testQueue.maxConcurrentOperationCount = 4
for _ in 0...10 {
testQueue.addOperation {
print("added \(Thread.current) on \(OperationQueue.current?.underlyingQueue?.label ?? "None")")
//Thread.sleep(forTimeInterval: 1)
}
//print("OP COUNT: \(testQueue.operationCount)")
}
testQueue.waitUntilAllOperationsAreFinished()yields this output
Hello, world!
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
OP COUNT: 1
done pushing operations
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
added <Thread: 0x00007f8e14000c80> on None
I would assume that different threads should be incorporated (maxConcurrentOperationCount is set to 4).
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