RFR: 8087200: Code heap does not use large pages (original) (raw)

Erik Helin erik.helin at oracle.com
Fri Jun 12 15:15:52 UTC 2015

• Previous message: RFR: 8073108: GHASH Intrinsics [need second reviewer]
• Next message: RFR: 8087200: Code heap does not use large pages
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi all,

this patch fixes an issue with the page sizing in in the code heap in 8u60 that was introduced in the backport for JDK-8049864. The issue does not exist in JDK 9 because the code heap in JDK 9 has been rewritten and uses the VirtualSpace to decide the page size for the reserved size (there is still an issue with the alignment of the comittted size in JDK 9, see JDK-8087339 0).

The fix for 8u60 consists of using the reserved size to determine the page size (and not require that the page size divides the reserved size, because the reserved size will be aligned to the page size later anyway).

Webrev: http://cr.openjdk.java.net/~ehelin/8087200/webrev.00/

Bug: https://bugs.openjdk.java.net/browse/JDK-8087200

Testing:

• JPRT
• Ad-hoc:
  • Bigapps:
    • Kitchensink
    • runThese
    • Weblogic
  • JTReg:
    • JDK
    • SVC
  • NSK
• Confirmed that the perf regression introduced with the backport of 0 went away.

Thanks, Erik

• Previous message: RFR: 8073108: GHASH Intrinsics [need second reviewer]
• Next message: RFR: 8087200: Code heap does not use large pages
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

More information about the hotspot-dev mailing list