Richard Purdie 2425a927c7 bitbake: runqueue: Optimise task migration code slightly
Move the calls to difference_update out a code level which improves efficiency
significantly.

Also further combine the outer loop for efficiency too.

These two changes remove a bottleneck from the performance charts.

(Bitbake rev: 57df7f191755dd887827d51b125d246c1af3e1b6)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit e28ec69356f1797de3e4e3fca0fef710bc4564de)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2020-01-11 11:06:22 +00:00

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.
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