RFR: 8297292: java/nio/channels/FileChannel/FileExtensionAndMap.java is too slow

[Alan Bateman]

On Thu, 9 Feb 2023 02:08:03 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Reduce the test’s disk space requirement by one third and the total number of files tested by half. With this change, the test was observed to still fail with a SIGBUS using JDK 11.0.15 on Linux 5.15.0-58. The test’s run time decreased by about two thirds: for one sample run from 29m56s to 10m13s in the CI on Linux-x64. A run with 50 repeats had no failures.

10mins is still very slow for a test in this area, I wonder if there is a better way to test this scenario that would run in a much short time.

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PR: https://git.openjdk.org/jdk/pull/12479