基于 截至2022.06.27 最新的 intel userspace cni 源码 KubeVirt + DPDK，涉及到一个intel的网络插件intel userspace cni，在搞KubeVirt...+ DPDK前先梳理下intel userspace cni的源码。...# intel userspace cni 大致目录结构，暂时不涉及vpp，忽略vpp的代码├── cniovs │ ├── cniovs.go - ovs网络插件 │ ├── localdb.go...cni自定义的类型 └── userspace └── userspace.go - main文件入口，cni的add/get/del方法的实现language-bash复制代码 cat cniovs.../pkg/annotations" "github.com/intel/userspace-cni-network-plugin/pkg/configdata" "github.com/intel/
虽然KubeVirt还没官方支持DPDK，但intel userspace cni已经为KubeVirt做了一些适配。...user client&server emptyDir ovs&qemu privilege vhost user client&server kubevirt 使用DPDK需要用到intel的网络插件userspace...kubevirt-with-dpdk/#For-vhost-user-client-ports-Open-vSwitch-acts-as-the-client-and-QEMU-the-server 本篇是关于intel userspace
为了解决这个问题，Linux内核引入了UIO（Userspace I/O）驱动模型。 UIO驱动模型以其简洁、高效和灵活的特点，为开发者提供了一种新的设备驱动开发方式。...一、什么是UIO UIO（Userspace I/O）是Linux内核中的一个轻量级驱动框架，它允许用户空间程序直接访问物理设备资源，如内存、中断和DMA通道等。
interface for userspace programs to export a filesystem to the Linux kernel....System in Userspace (FUSE) v2 libraries fuse-libs.i686 : File System in Userspace (FUSE) v2 libraries...fuse-libs.x86_64 : File System in Userspace (FUSE) v2 libraries fuse3-libs.i686 : File System in Userspace...: File System in Userspace (FUSE) v2 devel files fuse-devel.x86_64 : File System in Userspace (FUSE)...Userspace (FUSE) v2 and v3 fuse-common.x86_64 : Common files for File System in Userspace (FUSE) v2
Appliance）在OAK 18.6以上的版本，每间隔半小时会在/var/mail/root邮件中提示一个错误：Error getting repository data for ol6_x86_64_userspace_ksplice...X-Cron-Env: X-Cron-Env: Error getting repository data for ol7_x86_64_userspace_ksplice
ActivityManager.isLowRamDevice() when there is less than 1GB of memory available to the kernel and userspace...If Handheld device implementations are 32-bit: [H-1-1] The memory available to the kernel and userspace...on extra large screens mdpi or lower on large screens [H-2-1] The memory available to the kernel and userspace...large screens mdpi or higher on extra large screens [H-3-1] The memory available to the kernel and userspace...large screens tvdpi or higher on extra large screens [H-4-1] The memory available to the kernel and userspace
Userspace vs....All user software and processes installed by users run in the userspace....Userspace Proxy Mode In the userspace mode, most networking tasks, including setting packet rules and...Also, in the userspace mode, kube-proxy must frequently switch context between userspace and kernelspace...Thus, load balancing is done directly by the kube-proxy in the userspace.
模式Kube-proxy有两种模式：userspace和iptables。默认情况下，Kube-proxy使用iptables模式。...在用户空间模式下，Kube-proxy将通过userspace代理实现负载均衡。--proxy-mode=iptables--proxy-mode=userspace2....代理模式Kube-proxy支持三种代理模式：userspace、iptables和ipvs。其中，userspace和iptables模式已经在上面介绍过了。...--proxy-mode=iptables--proxy-mode=userspace--proxy-mode=ipvs3.
# userspace class x_font # userspace class x_colormap # userspace class x_property...# userspace class x_selection # userspace class x_cursor # userspace class x_client...userspace class db_procedure # userspace class db_column # userspace class db_tuple...# userspace class x_synthetic_event # userspace class x_application_data # userspace # kernel...db_view # userspace class db_sequence # userspace class db_language # userspace
1.47 GHz, 1.33 GHz, 1.20 GHz, 1.07 GHz, 933 MHz available cpufreq governors: conservative, ondemand, userspace...1.47 GHz, 1.33 GHz, 1.20 GHz, 1.07 GHz, 933 MHz available cpufreq governors: conservative, ondemand, userspace...1.47 GHz, 1.33 GHz, 1.20 GHz, 1.07 GHz, 933 MHz available cpufreq governors: conservative, ondemand, userspace...The governor "userspace" may decide which speed to use within this range....Requires userspace governor to be available and loaded -r, --related Switches all hardware-related
CONFIG_THREAD_CUSTOM_DATA /** crude thread-local storage */ void *custom_data; #endif #ifdef CONFIG_THREAD_USERSPACE_LOCAL_DATA...struct _thread_userspace_local_data *userspace_local_data; #endif #ifdef CONFIG_ERRNO #ifndef CONFIG_USERSPACE...*/ struct _thread_stack_info stack_info; #endif /* CONFIG_THREAD_STACK_INFO */ #if defined(CONFIG_USERSPACE...k_thread_stack_t *stack_obj; /** current syscall frame pointer */ void *syscall_frame; #endif /* CONFIG_USERSPACE
When any data is passed to the kernel space from userspace, it is the responsibility of the kernel developer...Its a hygienic practice to use copy_from_user() to read the userspace data....The functions copy_from_user() does all these checks and more before it copies the data from the userspace
When you are writing a linux application that needs either kernel to userspace communications or userspace...This is a simple mechanism for sending information down from userspace into the kernel to make requests...for info, or to direct the kernel to perform an operation on behalf of the userspace application....A good example of this type of communications between a userspace application and the kernel can be found...Here the tool itself is a userspace application that communicates via sockets to the kernel.
kube-proxy的模式有以下三种： Userspace iptables ipvs kube-proxy的主要作用是： 监听kube-api，获取Service相关的所有信息； 修改所有node上的转发规则...Userspace ?...相比于userspace，iptables模式全工作在内核态，不用经过用户态kube-proxy中转。
、iptables、ipvs、kernelspace，其发展历程如下所示： kubernetes v1.0：services 仅是一个“4层”代理，代理模块只有 userspace kubernetes...userspace 模式 在 userspace 模式下，访问服务的请求到达节点后首先进入内核 iptables，然后回到用户空间，由 kube-proxy 转发到后端的 pod，这样流量从用户空间进出内核带来的性能损耗是不可接受的...为什么 userspace 模式要建立 iptables 规则，因为 kube-proxy 监听的端口在用户空间，这个端口不是服务的访问端口也不是服务的 nodePort，因此需要一层 iptables...[services-userspace-overview.svg] iptables 模式 iptables 模式是目前默认的代理方式，基于 netfilter 实现。...userspace 代理模式不同的是，如果 iptables 代理最初选择的那个 pod 没有响应，它不会自动重试其他 pod。
Introduction FUSE (Filesystem in Userspace) is a very useful mechanism in many applications....FUSE has many advantages implied by userspace sandboxing, but for sure performance wasn't the main design...Complementarily, there is a userspace daemon called "sdcard"....daemon (sdcard) about new request Userspace daemon reads /dev/fuse Userspace daemon parses command and...) Kernel handles physical data access and sends data back to the userspace Userspace modifies (or not
review the list of these improvements, relevant SHAs for the 3.18, 4.4, and 4.9 kernels, and required userspace...Userspace changes Android O includes all userspace changes required to work with the current binder driver...To achieve that same effect, cherry-pick this change in userspace....Normally, vendor processes don't open the binder driver directly and instead link against the libbinder userspace
my_entry_point, NULL, NULL, NULL, MY_PRIORITY, 0, K_NO_WAIT); 用户模式限制 这节仅适用于 CONFIG_USERSPACE...valid priority value, and equal to or lower than the parent thread. 3.2 Dropping Permissions If CONFIG_USERSPACE...} ... } /* thread terminates at end of entry point function */ } 如果 CONFIG_USERSPACE...5 配置选项 CONFIG_USERSPACE 6 API 下列线程API，都在 kernel.h 中提供了： K_THREAD_DEFINE k_thread_create() k_thread_cancel
和userspace-rcu-master（在GlusterFS-master和GlusterFS-slave两台机器上都要操作） 1）下载glusterfs-3.6.9.tar.gz和userspace-rcu-master.zip...2）安装userspace-rcu-master [root@GlusterFS-master src]# unzip /usr/local/src/userspace-rcu-master.zip...userspace-rcu-master]# ..../bootstrap [root@GlusterFS-master userspace-rcu-master]# ....userspace-rcu-master]# ldconfig 3）安装userspace-rcu-master [root@GlusterFS-master userspace-rcu-master
、iptables、ipvs、kernelspace，其发展历程如下所示： kubernetes v1.0：services 仅是一个“4层”代理，代理模块只有 userspace kubernetes...userspace 模式 在 userspace 模式下，访问服务的请求到达节点后首先进入内核 iptables，然后回到用户空间，由 kube-proxy 转发到后端的 pod，这样流量从用户空间进出内核带来的性能损耗是不可接受的...为什么 userspace 模式要建立 iptables 规则，因为 kube-proxy 监听的端口在用户空间，这个端口不是服务的访问端口也不是服务的 nodePort，因此需要一层 iptables...iptables 模式与 userspace 模式最大的区别在于，iptables 模块使用 DNAT 模块实现了 service 入口地址到 pod 实际地址的转换，免去了一次内核态到用户态的切换，另一个与...userspace 代理模式不同的是，如果 iptables 代理最初选择的那个 pod 没有响应，它不会自动重试其他 pod。
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