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List:       openjdk-hotspot-compiler-dev
Subject:    Integrated: 8293019: [JVMCI] change ratio of libgraal to C1 threads and use one isolate per libgraal
From:       Doug Simon <dnsimon () openjdk ! org>
Date:       2022-08-31 16:16:35
Message-ID: 73R4f_HiMzRxcJh6FzBl5ZvZCmnckNQB1Nm7Ii1vpmY=.1b51553b-103d-45ca-a27c-c84173a1aac9 () github ! com
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On Wed, 31 Aug 2022 07:27:57 GMT, Doug Simon <dnsimon@openjdk.org> wrote:

> [JDK-8242440](https://bugs.openjdk.org/browse/JDK-8242440) allows the VM to use one \
> isolate per libgraal thread (OIPLT). This has a number of benefits such better \
> isolation of compiler crashes and avoids GC interference between isolates. \
> Experimentation has shown that reducing the ratio of libgraal threads to C1 threads \
> also helps keep the max RSS down. This PR makes OIPLT the default and adds a \
> `JVMCINativeLibraryThreadFraction` flag for configuring the libgraal to C1 thread \
> ratio. The default value for `JVMCINativeLibraryThreadFraction` is `0.33` which \
> means there are 2 C1 threads per libgraal thread.

This pull request has now been integrated.

Changeset: 3c1bda4b
Author:    Doug Simon <dnsimon@openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/3c1bda4bc3ad81ebabdd9ae05de53ff16f555027
                
Stats:     23 lines in 3 files changed: 18 ins; 0 del; 5 mod

8293019: [JVMCI] change ratio of libgraal to C1 threads and use one isolate per \
libgraal thread

Reviewed-by: never, iveresov

-------------

PR: https://git.openjdk.org/jdk/pull/10094


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