cpuinfoとopenssl speedの結果から見るに、aesアクセラレーターは無いっぽい？あるいは認識されていないのか。パフォーマンスも案の定32bitと比べて悪い様だ。これは、A53が64bit命令を実行できるようにしているのはbig.LITTLEとして使っている場合、突然パフォーマンスコアから省電力コアに切り替わる際に64bit命令が実行できなくて不正な命令になってしまうのを防ぐためで、高速に実行できるかどうかは考えていないためだったはず。
[alarm@alarm ~]$ cat /proc/cpuinfo processor : 0 BogoMIPS : 38.40 Features : fp asimd evtstrm crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4 processor : 1 BogoMIPS : 38.40 Features : fp asimd evtstrm crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4 processor : 2 BogoMIPS : 38.40 Features : fp asimd evtstrm crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4 processor : 3 BogoMIPS : 38.40 Features : fp asimd evtstrm crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4 [alarm@alarm ~]$ openssl speed aes-128-cbc Doing aes-128 cbc for 3s on 16 size blocks: 4187159 aes-128 cbc's in 2.99s Doing aes-128 cbc for 3s on 64 size blocks: 1135520 aes-128 cbc's in 2.99s Doing aes-128 cbc for 3s on 256 size blocks: 291828 aes-128 cbc's in 2.99s Doing aes-128 cbc for 3s on 1024 size blocks: 73494 aes-128 cbc's in 2.98s Doing aes-128 cbc for 3s on 8192 size blocks: 9211 aes-128 cbc's in 2.99s Doing aes-128 cbc for 3s on 16384 size blocks: 4600 aes-128 cbc's in 2.99s OpenSSL 1.1.0i 14 Aug 2018 built on: reproducible build, date unspecified options:bn(64,64) rc4(char) des(int) aes(partial) idea(int) blowfish(ptr) compiler: gcc -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DVPAES_ASM -DECP_NISTZ256_ASM -DPOLY1305_ASM -DOPENSSLDIR="\"/etc/ssl\"" -DENGINESDIR="\"/usr/lib/engines-1.1\"" -Wa,--noexecstack -D_FORTIFY_SOURCE=2 -march=armv8-a -O2 -pipe -fstack-protector-strong -fno-plt -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now The 'numbers' are in 1000s of bytes per second processed. type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes aes-128 cbc 22406.20k 24305.44k 24985.94k 25254.31k 25236.29k 25206.15k