Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-26769

InnoDB internal latches do not support hardware lock elision

    XMLWordPrintable

Details

    Description

      The synchronization primitives implemented in operating system libraries such as GNU libc may support lock elision via transactional memory when supported by the underlying hardware. The native primitives in InnoDB are currently missing that.

      Lock elision could avoid unnecessary memory cache pollution in case a mutex is not contended. For example, when reading or sometimes even writing buf_pool.page_hash or lock_sys.rec_hash, we could avoid modifying cache lines only for the purpose of acquiring and releasing latches.

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27936 hardware lock elision on ppc64{,le} failing to compile

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30986 Slow full index scan in 10.6 vs 10.5 for the (slow) I/O-bound case

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-26826 Duplicated computations of buf_pool.page_hash addresses

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-26828 Spinning on buf_pool.page_hash is wasting CPU cycles

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-28137 Some memory transactions are unnecessarily complex

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27222 FreeBSD 13.0-p4 build error mariadb-10.6.5

          • Major - Major loss of function.
          • Closed

          Activity

            People

              marko Marko Mäkelä
              marko Marko Mäkelä
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.