JDK-8294610 : java/net/vthread/HttpALot.java is slow on Linux
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.net
  • Affected Version: 20
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2022-09-29
  • Updated: 2022-10-03
  • Resolved: 2022-10-01
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JDK 20
20 masterFixed
Related Reports
Relates :  
JDK-8294146 - Review running times of virtual thread regression tests
Relates :  
JDK-6968351 - httpserver clashes with delayed TCP ACKs for low Content-Length
Description
This test runs in 5-6s on macOS and Windows. On Linux it takes 60-70s.
Comments
Changeset: fd594302 Author: Jaikiran Pai <jpai@openjdk.org> Date: 2022-10-01 09:17:53 +0000 URL: https://git.openjdk.org/jdk/commit/fd594302f79b934c9eca713d84313b73f4899aa3
01-10-2022
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/10504 Date: 2022-09-30 09:10:05 +0000
30-09-2022
I've opened a PR with a change which improves the test run duration on Linux https://github.com/openjdk/jdk/pull/10504. Additionally, we will be investigating if anything additional needs to be done in the JDK networking layer to improve this situation without the use of TCP_NODELAY. Those experiments will be carried out under another existing JBS issue https://bugs.openjdk.org/browse/JDK-6968351
30-09-2022
Sean Coffey has suggested this may be related to Nagle and Jakikrian has done some initially testing with -Dsun.net.httpserver.nodelay=true.
29-09-2022