문서 편집 권한이 없습니다. 다음 이유를 확인해주세요: 요청한 명령은 다음 권한을 가진 사용자에게 제한됩니다: 사용자. 문서의 원본을 보거나 복사할 수 있습니다. [[분류: 시스템 벤치마크]] == Stroage Latency Comparison == <syntaxhighlight lang="c" line="1"> L1 cache reference 0.5 ns Branch mispredict 5 ns L2 cache reference 7 ns 14x L1 cache Mutex lock/unlock 25 ns Main memory reference 100 ns 20x L2 cache, 200x L1 cache getpid 120 ns CR3 Update without TLB flush 120 ns VMFUNC with eptp switching 120 ns Compress 1K bytes with Zippy 3,000 ns 3 us Send 1K bytes over 1 Gbps network 10,000 ns 10 us Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD Read 1 MB sequentially from memory 250,000 ns 250 us Round trip within same datacenter 500,000 ns 500 us Read 1 MB sequentially from SSD* 1,000,000 ns 1,000 us 1 ms ~1GB/sec SSD, 4X memory Disk seek 10,000,000 ns 10,000 us 10 ms 20x datacenter roundtrip Read 1 MB sequentially from disk 20,000,000 ns 20,000 us 20 ms 80x memory, 20X SSD Send packet CA->Netherlands->CA 150,000,000 ns 150,000 us 150 ms </syntaxhighlight> == Instructions == <syntaxhighlight lang="c" line="1"> MOV 1 cycles JMP (Short) 1 cycles JMP (Far) 16-20 cycles CALL (Far) 16-22 cycles CALL (Near) 3 cycles INT 33 cycles IRET 32 cycles CLI 8-9 cycles STI 16-17 cycles RDTSC 5 cycles WRPKRU 22 cycles RDPKRU 7 cycles </syntaxhighlight> == 참고 == # https://gist.github.com/jboner/2841832/forks # https://www.agner.org/optimize/instruction_tables.pdf Latency 101 문서로 돌아갑니다.