RFR: 8081289: aarch64: add support for RewriteFrequentPairs in interpreter (original) (raw)

Edward Nevill edward.nevill at linaro.org
Thu Jun 4 10:37:55 UTC 2015

Hi,

Just a polite ping. I submitted this patch for review by a JDK9 reviewer over a week ago and there has been no response.

This patch was contributed by Alexander Alexeev who is a new contributer to OpenJDK.

The patch affects only _arch64 files and both Alexander and I have verified it by running JTreg hotspot with -Xint.

Thanks for your help, Ed,

On 27 May 2015 at 14:21, Edward Nevill <edward.nevill at linaro.org> wrote:

Hi,

The following webrev adds support for RewriteFrequentPairs to the template interpreter for aarch64. http://cr.openjdk.java.net/~enevill/8081289/webrev.00 This was contributed by Alexander Alexeev ( alexander.alexeev at caviumnetworks.com) This gives a small improvement to the interpreter on aarch64, and brings it in line with all the other ports (x86, sparc, ppc, zero) which all support RewriteFrequentPairs. I have done some performance measurement using -Xint with some micro benchmarks and I see a small improvement on each. java dhrystone: +9% embedded caffeinemark: +4% grinderbench: +1% dacapo (avrora): +1% Tested with hotspot jtreg:- Original: Test results: passed: 787; failed: 24; error: 44 With patch: Test results: passed: 785; failed: 24; error: 46 The difference in the # of errors is due to timeouts because we are running -Xint. Please review and if OK I will push. All the best, Ed.

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