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qemu / qemu / c22edfebff29f63d793032e4fbd42a035bb73e27
commitc22edfebff29f63d793032e4fbd42a035bb73e27[log] [tgz]
authorAlex Bennée <alex.bennee@linaro.org>Thu Feb 23 18:29:24 2017 +0000
committerAlex Bennée <alex.bennee@linaro.org>Fri Feb 24 10:32:46 2017 +0000
tree044ff53d9b0d2b90df07e228e619b9d8f2513ae7
parent062ba099e01ff1474be98c0a4f3da351efab5d9d [diff]
target-arm: don't generate WFE/YIELD calls for MTTCG

The WFE and YIELD instructions are really only hints and in TCG's case
they were useful to move the scheduling on from one vCPU to the next. In
the parallel context (MTTCG) this just causes an unnecessary cpu_exit
and contention of the BQL.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
3 files changed
tree: 044ff53d9b0d2b90df07e228e619b9d8f2513ae7
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. chardev/
  6. contrib/
  7. crypto/
  8. default-configs/
  9. disas/
  10. docs/
  11. fpu/
  12. fsdev/
  13. gdb-xml/
  14. hw/
  15. include/
  16. io/
  17. libdecnumber/
  18. linux-headers/
  19. linux-user/
  20. migration/
  21. nbd/
  22. net/
  23. pc-bios/
  24. po/
  25. qapi/
  26. qga/
  27. qobject/
  28. qom/
  29. replay/
  30. roms/
  31. scripts/
  32. slirp/
  33. stubs/
  34. target/
  35. tcg/
  36. tests/
  37. trace/
  38. ui/
  39. util/
  40. dtc
  41. pixman
  42. .dir-locals.el
  43. .exrc
  44. .gitignore
  45. .gitmodules
  46. .mailmap
  47. .travis.yml
  48. accel.c
  49. arch_init.c
  50. atomic_template.h
  51. balloon.c
  52. block.c
  53. blockdev-nbd.c
  54. blockdev.c
  55. blockjob.c
  56. bootdevice.c
  57. bt-host.c
  58. bt-vhci.c
  59. Changelog
  60. CODING_STYLE
  61. configure
  62. COPYING
  63. COPYING.LIB
  64. cpu-exec-common.c
  65. cpu-exec.c
  66. cpus-common.c
  67. cpus.c
  68. cputlb.c
  69. device-hotplug.c
  70. device_tree.c
  71. disas.c
  72. dma-helpers.c
  73. dump.c
  74. exec.c
  75. gdbstub.c
  76. HACKING
  77. hax-stub.c
  78. hmp-commands-info.hx
  79. hmp-commands.hx
  80. hmp.c
  81. hmp.h
  82. ioport.c
  83. iothread.c
  84. kvm-all.c
  85. kvm-stub.c
  86. LICENSE
  87. MAINTAINERS
  88. Makefile
  89. Makefile.objs
  90. Makefile.target
  91. memory.c
  92. memory_ldst.inc.c
  93. memory_mapping.c
  94. module-common.c
  95. monitor.c
  96. numa.c
  97. os-posix.c
  98. os-win32.c
  99. page_cache.c
  100. qapi-schema.json
  101. qdev-monitor.c
  102. qdict-test-data.txt
  103. qemu-bridge-helper.c
  104. qemu-doc.texi
  105. qemu-ga.texi
  106. qemu-img-cmds.hx
  107. qemu-img.c
  108. qemu-img.texi
  109. qemu-io-cmds.c
  110. qemu-io.c
  111. qemu-nbd.c
  112. qemu-nbd.texi
  113. qemu-option-trace.texi
  114. qemu-options-wrapper.h
  115. qemu-options.h
  116. qemu-options.hx
  117. qemu-seccomp.c
  118. qemu-tech.texi
  119. qemu.nsi
  120. qemu.sasl
  121. qmp.c
  122. qtest.c
  123. README
  124. replication.c
  125. replication.h
  126. rules.mak
  127. softmmu_template.h
  128. spice-qemu-char.c
  129. tcg-runtime.c
  130. tci.c
  131. thunk.c
  132. tpm.c
  133. trace-events
  134. translate-all.c
  135. translate-all.h
  136. translate-common.c
  137. user-exec-stub.c
  138. user-exec.c
  139. VERSION
  140. version.rc
  141. vl.c
  142. xen-common-stub.c
  143. xen-common.c
  144. xen-hvm-stub.c
  145. xen-hvm.c
  146. xen-mapcache.c