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The looping over multiple changed hashes causes many calls to get_taskhash and get_unihash which are potentially slow and then overwritten. Instead, batch up all the tasks which have changed unihashes and then do one big loop over the changed tasks rather than each in turn. This makes worlds of difference to the performance graphs and should speed up build where many tasks are being rehashed. (Bitbake rev: c9ab598f6f1ea3ae3a0713dc6692b4c4bafbfb50) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit c9c68d898985cf0bec6fc95f54c151cc50255cac) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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.