Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8324186

use "dmb.ishst+dmb.ishld" for release barrier

XMLWordPrintable

    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
    • 23
    • 17, 21, 23
    • hotspot
    • b08
    • aarch64
    • Fix failed

      See details at https://mail.openjdk.org/pipermail/hotspot-compiler-dev/2024-January/071921.html.
      Using a combined dmb.ish for release barrier will introduce a heavy storeload barrier.
      Use "dmb.ishst+dmb.ishld" pair instead, we can gain 13%~32% performance gain on N1 and N2 architecture.

      Kuai Wei will own this issue.

            aph Andrew Haley
            jzhu Joshua Zhu
            Votes:
            0 Vote for this issue
            Watchers:
            8 Start watching this issue

              Created:
              Updated:
              Resolved: