RTE_IOVA_PA = (1 << 0), /* DMA using physical address */ RTE_IOVA_VA = (1 << 1) /* DMA using virtual address */ }; /* * Get physical address of any mapped virtual address in the current process. */ phys_addr_t rte_mem_virt2phy(const void *virtaddr) { int fd, retval;...
如果再把 linear address 切成四段,用前三段分别作为索引去PGD、PMD、Page Table里查表,最终就会得到一个页表项(Page Table Entry),那里面的值就是一页物理内存的起始地址,把它加上 linear address 切分之后第四段的内容(又叫页内偏移)就得到了最终的 physical address。我们把这个过程称作页式内存管理。 问题来...
o All devices on an Ethernet network have a Media Access Control (MAC) address, sometimes called a hardware address. This address is independent of a host’s IP address, and it is unique to the host’s Ethernet network (but not necessarily a larger software network such as the Internet)....
To activate a connection, NetworkManager often delegates the tasks to other specialized network tools and daemons such as dhclient to get Internet layer configuration from a locally attached physical network. Because network configuration tools and schemes vary among distributions, NetworkManager uses plugin...
VME (Virtual mode extension) DE (Debugging extension) --- Usage: dmidecode [OPTIONS] Options are: -d, --dev-mem FILE Read memory from device FILE (default: /dev/mem) #从设备文件读信息,输出内容与不加参数标准输出相同 -h, --help Display this help text and exit #显示...
In this section, you prepare your Linux virtual machine or physical device for IoT Edge. Then, you install IoT Edge.Run the following commands to add the package repository and then add the Microsoft package signing key to your list of trusted keys....
From theDevicespage, select the IoT Edge device ID from the list. Copy the value of eitherPrimary Connection StringorSecondary Connection String. Either key works. Install IoT Edge In this section, you prepare your Linux virtual machine or physical device for IoT Edge. Then, you install IoT ...
// include/asm-i386/pgtable.h/* Just any arbitrary offset to the start of the vmalloc VM area: the* current 8MB value just means that there will be a 8MB "hole" after the* physical memory until the kernel virtual memory starts. That means that* any out-of-bounds memory accesses will...
NVUE Commands cumulus@switch:~$ nv set vrf RED router bgp address-family ipv4-unicast route-import from-vrf list BLUE cumulus@switch:~$ nv config apply vtysh Commands Exclude Certain Prefixes To exclude certain prefixes from the import process, configure the prefixes in a route map. ...
Virtual hosting These options together allow to you configure more than one IP address onto an interface. This is sometimes useful if you want to do "virtual hosting," through which a single machine can be configured to look and act as though it were actually many separate machines, each wit...