Junming Liu liujunming

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Virtualization

liujunming / socket_client.cpp

Created August 31, 2023 08:01 — forked from alexandruc/socket_client.cpp

Unix domain sockets example

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <sys/socket.h>
	#include <sys/un.h>
	#include <sys/types.h>

	static const char* socket_path = "/home/mysocket";
	static const unsigned int s_recv_len = 200;
	static const unsigned int s_send_len = 100;

liujunming / latency.txt

Created March 23, 2018 10:15 — forked from jboner/latency.txt

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers
	--------------------------
	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
	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