Latency 101 - 편집 역사

Ahn9807: /* Instructions */

2023-06-02T07:42:48Z

Instructions

← 이전 판		2023년 6월 2일 (금) 07:42 판
35번째 줄:		35번째 줄:
	WRPKRU 22 cycles		WRPKRU 22 cycles
	RDPKRU 7 cycles		RDPKRU 7 cycles
			WRMSR (0x6E1 PKS) 320 cycles
			RDMSR (0x6E1 PKS) 120 cycles
	</syntaxhighlight>		</syntaxhighlight>

Ahn9807: /* Stroage Latency Comparison */

2023-05-14T06:04:16Z

Stroage Latency Comparison

← 이전 판		2023년 5월 14일 (일) 06:04 판
7번째 줄:		7번째 줄:
	L2 cache reference 7 ns 14x L1 cache		L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns		Mutex lock/unlock 25 ns
			VMFUNC with eptp switching 54 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache		Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	getpid 120 ns		getpid 120 ns
	CR3 Update without TLB flush 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		Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us		Send 1K bytes over 1 Gbps network 10,000 ns 10 us

Ahn9807: /* Stroage Latency Comparison */

2023-05-14T05:13:19Z

Stroage Latency Comparison

← 이전 판		2023년 5월 14일 (일) 05:13 판
2번째 줄:		2번째 줄:

	== Stroage Latency Comparison ==		== Stroage Latency Comparison ==
	<syntaxhighlight lang="c" line>		<syntaxhighlight lang="c" line="1">
	L1 cache reference 0.5 ns		L1 cache reference 0.5 ns
	Branch mispredict 5 ns		Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache		L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns		Mutex lock/unlock 25 ns
	~~getpid 50 ns~~
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache		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		Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us		Send 1K bytes over 1 Gbps network 10,000 ns 10 us
20번째 줄:		22번째 줄:
	</syntaxhighlight>		</syntaxhighlight>
	== Instructions ==		== Instructions ==
	<syntaxhighlight lang="c" line>		<syntaxhighlight lang="c" line="1">
	MOV 1 cycles		MOV 1 cycles
	JMP (Short) 1 cycles		JMP (Short) 1 cycles
31번째 줄:		33번째 줄:
	STI 16-17 cycles		STI 16-17 cycles
	RDTSC 5 cycles		RDTSC 5 cycles
			WRPKRU 22 cycles
			RDPKRU 7 cycles
	</syntaxhighlight>		</syntaxhighlight>

Ahn9807: 새 문서: 분류: 시스템 벤치마크 == Stroage Latency Comparison == L1 cache reference 0.5 ns Branch mispredict 5 ns L2 cache reference 7 ns 14x L1 cache Mutex lock/unlock 25 ns getpid 50 ns Main memory reference 100 ns 20x L2...

2023-02-03T06:48:33Z

새 문서: 분류: 시스템 벤치마크 == Stroage Latency Comparison == <syntaxhighlight lang="c" line> L1 cache reference 0.5 ns Branch mispredict 5 ns L2 cache reference 7 ns 14x L1 cache Mutex lock/unlock 25 ns getpid 50 ns Main memory reference 100 ns 20x L2...

새 문서

[[분류: 시스템 벤치마크]]

== Stroage Latency Comparison ==
<syntaxhighlight lang="c" line>
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
getpid 50 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
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>
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
</syntaxhighlight>

== 참고 ==
# https://gist.github.com/jboner/2841832/forks
# https://www.agner.org/optimize/instruction_tables.pdf