[Bug 1895703] [NEW] performance degradation in tcg since Meson switch

[Philippe Mathieu-Daudé]

Public bug reported:

The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
introduced a degradation in performance in some TCG targets:

--------------------------------------------------------
Test Program: matmult_double
--------------------------------------------------------
Target              Instructions     Previous    Latest
                                     1d806cef   7fd51e68
----------  --------------------  ----------  ----------
alpha              3 233 957 639       -----     +7.472%
m68k               3 919 110 506       -----    +18.433%
--------------------------------------------------------

Original report from Ahmed Karaman with further testing done
by Aleksandar Markovic:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: buildsys tcg

** Tags added: buildsys tcg

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https://bugs.launchpad.net/bugs/1895703

Title:
  performance degradation in tcg since Meson switch

Status in QEMU:
  New

Bug description:
  The buildsys conversion to Meson (1d806cef0e3..7fd51e68c34)
  introduced a degradation in performance in some TCG targets:

  --------------------------------------------------------
  Test Program: matmult_double
  --------------------------------------------------------
  Target              Instructions     Previous    Latest
                                       1d806cef   7fd51e68
  ----------  --------------------  ----------  ----------
  alpha              3 233 957 639       -----     +7.472%
  m68k               3 919 110 506       -----    +18.433%
  --------------------------------------------------------

  Original report from Ahmed Karaman with further testing done
  by Aleksandar Markovic:
  https://www.mail-archive.com/qemu-devel@nongnu.org/msg740279.html

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