Integrated: 8317538: Potential bottleneck in Provider::getService: specjvm2008::crypto.rsa have scalability issue for high vCPU numbers

Thu Nov 21 17:57:23 UTC 2024

On Fri, 25 Oct 2024 18:18:16 GMT, Vladimir Ivanov <vaivanov at openjdk.org> wrote:

> This patch remove access to the shared variable to fix scalability issue in the multithread environment. According to testing by the specjvm2008::crypto.rsa the one thread performance reduced for less than 1% while the score for the multithread run increased in ~2x. For the 2 socket system with Xeon 8480+ numbers looks as:
> •	1 thread: 643.15 for original version vs 642.54 for patched one;
> •	224 threads: 22446.19 for original vs 46147.41 for patched.
> The RSABench microbenchmark reports no score changes for the 1 thread (average for all testcases) and 2.4% improvement for the 224 threads.

This pull request has now been integrated.

Changeset: 4956a766
Author:    Vladimir Ivanov <vaivanov at openjdk.org>
Committer: Derek White <drwhite at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/4956a766213c3d76e13b98ac5d5efe5d4f553895
Stats:     4 lines in 1 file changed: 0 ins; 0 del; 4 mod

8317538: Potential bottleneck in Provider::getService: specjvm2008::crypto.rsa have scalability issue for high vCPU numbers

Reviewed-by: ascarpino

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PR: https://git.openjdk.org/jdk/pull/21719