Hello, During the development for our new platform, armada380 based, I see that the "standard" version of memmove/memcpy is faster than the "xscale" one. For that, I just remove the _ARM_ARCH_5E define into the file sys/arm/arm/support.S. There is the results: Block size: 2048 memcpy (Kernel ARM) : 1028.7 MB/s memmove (Kernel ARM) : 616.5 MB/s memcpy (Kernel xscale) : 920.1 MB/s memmove (Kernel xscale) : 618.8 MB/s Block size: 128 memcpy (Kernel ARM) : 1018.5 MB/s memmove (Kernel ARM) : 668.4 MB/s memcpy (Kernel xscale) : 825.9 MB/s memmove (Kernel xscale) : 668.6 MB/s Block size: 64 memcpy (Kernel ARM) : 892.9 MB/s memmove (Kernel ARM) : 667.2 MB/s memcpy (Kernel xscale) : 721.2 MB/s memmove (Kernel xscale) : 668.2 MB/s Block size: 32 memcpy (Kernel ARM) : 620.6 MB/s memmove (Kernel ARM) : 634.6 MB/s memcpy (Kernel xscale) : 504.9 MB/s memmove (Kernel xscale) : 634.5 MB/s Block size: 16 memcpy (Kernel ARM) : 471.8 MB/s memmove (Kernel ARM) : 464.5 MB/s memcpy (Kernel xscale) : 254.5 MB/s memmove (Kernel xscale) : 464.7 MB/s Please note that the userland suffer the same problem, and the standard "ARM" is a little bit more efficient. I'm available to test any point you want. Best regards Alexandre Martins
FreeBSD dropped support for ARMv5 on the 2020/01/02 this commit is a good place to start reading from https://lists.freebsd.org/pipermail/svn-src-all/2020-January/191927.html