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Issue #6328 - avoid binding WebSocket MethodHandles #8087

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Issue #6328 - avoid binding WebSocket MethodHandles #8087

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lachlan-roberts
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@lachlan-roberts lachlan-roberts commented Jun 1, 2022 •
edited by joakime
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Fixes #6328

Use a new JettyMethodHandle interface so that implementations can be used which avoid binding the MethodHandles for each WebSocket connection. This will avoid the multiple spikes seen on the flamegraph from #6328.

For Javax endpoints we are creating new method handles each time because we cannot have the same MetaData cache as used in the JettyWebSocketFrameHandlerFactory because it depends on both the endpointClass and the endpointConfig. However javax.websocket.MessageHandler does not actually use method handles at all and has a special implementation of JettyMethodHandle.

gregw
gregw requested changes Jun 2, 2022
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Pretty good.... but naming needs improvement.
Also I question the need for sparse binding of args. It would be more efficient to only support the same binding style as MethodHandle

...e-common/src/main/java/org/eclipse/jetty/websocket/core/internal/util/JettyMethodHandle.java Outdated Show resolved Hide resolved
.../src/main/java/org/eclipse/jetty/websocket/javax/common/JavaxMessagePartialMethodHandle.java Outdated Show resolved Hide resolved
...rc/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingJettyMethodHandle.java Outdated Show resolved Hide resolved
...rc/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingJettyMethodHandle.java Outdated Show resolved Hide resolved
...rc/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingJettyMethodHandle.java Outdated Show resolved Hide resolved
sbordet
sbordet requested changes Jun 3, 2022
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...on/src/main/java/org/eclipse/jetty/websocket/core/internal/messages/AbstractMessageSink.java Outdated Show resolved Hide resolved
...src/main/java/org/eclipse/jetty/websocket/core/internal/messages/InputStreamMessageSink.java Outdated Show resolved Hide resolved
...mmon/src/main/java/org/eclipse/jetty/websocket/core/internal/messages/ReaderMessageSink.java Outdated Show resolved Hide resolved
...mmon/src/main/java/org/eclipse/jetty/websocket/core/internal/messages/StringMessageSink.java Outdated Show resolved Hide resolved
.../src/main/java/org/eclipse/jetty/websocket/javax/common/JavaxMessagePartialMethodHolder.java Outdated Show resolved Hide resolved
.../main/java/org/eclipse/jetty/websocket/javax/common/messages/AbstractDecodedMessageSink.java Show resolved Hide resolved
...rc/main/java/org/eclipse/jetty/websocket/javax/common/messages/DecodedBinaryMessageSink.java Show resolved Hide resolved
...n/java/org/eclipse/jetty/websocket/javax/common/messages/DecodedBinaryStreamMessageSink.java Show resolved Hide resolved
.../src/main/java/org/eclipse/jetty/websocket/javax/common/messages/DecodedTextMessageSink.java Show resolved Hide resolved
...ain/java/org/eclipse/jetty/websocket/javax/common/messages/DecodedTextStreamMessageSink.java Show resolved Hide resolved
gregw
gregw requested changes Jun 3, 2022
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Getting there...

...t-core-common/src/main/java/org/eclipse/jetty/websocket/core/internal/util/MethodHolder.java Outdated Show resolved Hide resolved
...t-core-common/src/main/java/org/eclipse/jetty/websocket/core/internal/util/MethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
gregw
gregw requested changes Jun 6, 2022
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I'm down to tiny quibbles now.

...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
...mon/src/main/java/org/eclipse/jetty/websocket/core/internal/util/NonBindingMethodHolder.java Outdated Show resolved Hide resolved
sbordet
sbordet previously approved these changes Jun 8, 2022
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@joakime
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joakime commented Jun 8, 2022

Do we want this in Jetty 10.0.10 release?

@lachlan-roberts
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@joakime no this does not need to be in the 10.0.10 release.

I think it also needs some performance testing to assess the impact of this.

gregw
gregw previously approved these changes Jun 8, 2022
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joakime commented Jun 21, 2022

Skipping this release, moving to 10.0.12 / 11.0.12 release.

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joakime commented Aug 2, 2022

@lachlan-roberts you can merge this one now.

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joakime commented Nov 10, 2022

@lachlan-roberts can this be merged?

@joakime joakime added the Bug For general bugs on Jetty side label Nov 10, 2022
@lachlan-roberts
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@joakime no, the benchmarks indicated that using the wrapper around methodhandle is significantly slower. So we need to further assess the performance impact this change would have.

I don't think this should be classified as a bug, the current usage of MethodHandles is not wrong.

@lachlan-roberts lachlan-roberts added Enhancement and removed Bug For general bugs on Jetty side labels Nov 11, 2022
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joakime commented Nov 14, 2022

Moving this to 10.0.14 then.

@joakime joakime added this to the 10.0.x milestone Dec 8, 2022
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@lachlan-roberts what's the status of this one? Should it be moved back to Draft status?

@lachlan-roberts lachlan-roberts marked this pull request as draft July 3, 2023 23:11
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@janbartel yes I converted it back to a draft.

Maybe this PR is something we want to consider for Jetty 12.

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gregw commented Jul 5, 2023

@lachlan-roberts I've asked the OP what their status is.
Can you update the branch against latest 10.0.x and repeat performance tests to check impact.

I would think this is something we want to do for 10/11/12 or not at all. If there is a net benefit, then best to keep the code similar in all branches.

@lachlan-roberts lachlan-roberts dismissed stale reviews from sbordet and gregw via 68e6e9c October 4, 2023 01:34
@lachlan-roberts lachlan-roberts force-pushed the jetty-10.0.x-6328-JettyMethodHandlesExperiment branch from 68e6e9c to e07b8b4 Compare October 4, 2023 01:38
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closing in favor of #10750 for Jetty 12

@lachlan-roberts lachlan-roberts deleted the jetty-10.0.x-6328-JettyMethodHandlesExperiment branch October 18, 2023 20:10
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High CPU usage of method handle invocations in Jetty 10
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@lachlan-roberts @joakime @janbartel @gregw @sbordet