RFR: 8316415: Parallelize sun/security/rsa/SignedObjectChain.java subtests [v2]

[Michal Sobierski]

> sun/security/rsa/SignedObjectChain.java is very slow when run with C1, I suspect because some crypto intrinsics are only implemented in C2. Commit contains changes made to parallelize it.
> 
> Comparison of before and after parallelization:
> time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java TEST_VM_OPTS="-XX:+UseParallelGC -XX:TieredStopAtLevel=1"
> before:   270.72s user 4.88s system 108% cpu 4:14.43 total
> after:   410.76s user 7.50s system 555% cpu 1:15.23 total
> 
> time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java TEST_VM_OPTS="-XX:+UseParallelGC"
> before:   63.67s user 4.67s system 161% cpu 42.424 total
> after:   130.36s user 7.47s system 585% cpu 23.526 total
> 
> time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java TEST_VM_OPTS="-XX:+UseShenandoahGC -XX:TieredStopAtLevel=1"
> before:   281.99s user 5.54s system 108% cpu 4:24.09 total
> after:   386.98s user 8.62s system 496% cpu 1:19.73 total
> 
> time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java TEST_VM_OPTS="-XX:+UseShenandoahGC"
> before:   65.86s user 5.05s system 156% cpu 45.215 total
> after:   135.90s user 7.66s system 585% cpu 24.502 total

Michal Sobierski has updated the pull request incrementally with one additional commit since the last revision:

  Better approach to parallelize sun/security/rsa/SignedObjectChain.java
  
  time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java
  TEST_VM_OPTS="-XX:+UseParallelGC -XX:TieredStopAtLevel=1"
  before:   270.72s user 4.88s system 108% cpu 4:14.43 total
  after:   375.46s user 4.59s system 539% cpu 1:10.41 total
  
  time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java
  TEST_VM_OPTS="-XX:+UseParallelGC"
  before:   63.67s user 4.67s system 161% cpu 42.424 total
  after:   67.31s user 4.48s system 417% cpu 17.183 total
  
  time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java
  TEST_VM_OPTS="-XX:+UseShenandoahGC -XX:TieredStopAtLevel=1"
  before:   281.99s user 5.54s system 108% cpu 4:24.09 total
  after:   413.51s user 5.08s system 613% cpu 1:08.25 total
  
  time make test TEST=jdk/sun/security/rsa/SignedObjectChain.java
  TEST_VM_OPTS="-XX:+UseShenandoahGC"
  before:   65.86s user 5.05s system 156% cpu 45.215 total
  after:   83.25s user 4.82s system 469% cpu 18.741 total

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15860/files
  - new: https://git.openjdk.org/jdk/pull/15860/files/e6d9a0f7..0040ba31

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15860&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15860&range=00-01

  Stats: 95 lines in 1 file changed: 12 ins; 78 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/15860.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15860/head:pull/15860

PR: https://git.openjdk.org/jdk/pull/15860