全部博文（22）
发布时间：2013-05-15 16:07:41
Linux SNMP OID’s for CPU,Memory and Disk Statistics SNMP stands for Simple Network Management Protocol and consists of three key components: managed devices, agents, and network-management systems (NMSs). A managed device is a node that has an SNMP agent and resides on a managed n.........【阅读全文】
发布时间：2013-02-01 16:05:45
通常，kernel的timer心跳频率是，100,250,1000，也就是时钟中断的最小频率是1ms，那么gettimeofday这种系统函数，是如何获取更精确的时钟呢？usec是从何而来？gettimeofday（）对应的syscall,会调用do_gettimeofday（）；getnstimeofday()--->timekeeping_get_ns()-->clocksource.read();platform初始化时，通过 clocks.........【阅读全文】
