akimasa1 min read

Raspberry Pi 3をaarch64で動かす

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

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