摘要：First confirm that you have root privilege. Second check the config of kernel that you have the configs on: Last you confirm you have your debugfs/tra 阅读全文

摘要：libev First let's talk about libev, it is a lib used in ss. The coding style of libev is ugly. To see man page of libev by: man ./ev.3 3 files need to 阅读全文

摘要：At kernel init, each logical core has a thread called ksoftirq/%d running. These threads are brought up by the initial function net_dev_init(). While 阅读全文

摘要：According to RedHat accessories, TCP_NODELAY: each call to write(fd, buf...) will be sent out as packet. This leads to poor overall performance when m 阅读全文

摘要：Before using stap, the kernel-debuginfo-$(uname -r), kernel-debuginfo-common-$(uname -m)-$(uname -r) and kernel-devel-$(uname -r) should be installed. 阅读全文

摘要：My summary after reading this. Before doing large memory writes: _mm*_stream_s[i,s,d]*: non-temporal memory store: When data is produced and not (imme 阅读全文

摘要：ioctl is used in communication with modules of Linux. Module: User space In case of Makefile is needed: 阅读全文

摘要：SNMP is a protocol that enables server remote-info-exchange. Which according to wikipedia: it [collecting and organizing information about managed dev 阅读全文

摘要：before talking about Makefiles, compilers are important pre-knowledge. first compile a executable ELF file, by: if we are going to compile one/several 阅读全文

摘要：if using dpdk, then OvS' datapath folder is ignored. Only OvS' userspace code are in use. According to manpages of ovs-vsctl/ovs-dpctl, it says that t 阅读全文

摘要：this passage is referenced, appreciated. ZooKeeper installation: to share my_data between clients.. create /zk_test my_dataget /zk_testdelete /zk_test 阅读全文

摘要：Environment Build Step: these packages are needed for building dpdk+ovs: First download latest dpdk & ovs :http://dpdk.org/download git clone https:// 阅读全文

摘要：Using Vim.. Python programing seems easier because YCM helps presenting all the arguments required in its order.. But there's one more problem that's 阅读全文

摘要：To prevent Memory Consistency Errors(MCEs), it is good practice to specify synchronized class specifier, and mark all the related methods as synchroni 阅读全文

摘要：In Java, the main process can have several threads at a time, but only a few of them can run concurrently, so it is needed to cancel some thread at ti 阅读全文

摘要：A file's status is 3-valued: So !Files.exists(path) != Files.notExists(path). If both exists and notExists return false, the existence of the file can 阅读全文

摘要：Using BigDecimal to perform precise calculations with floats. BigDecimal is a class type. So declare/construct one BigDecimal is in the form like: Do 阅读全文

摘要：Java learning scripts 阅读全文