qemu-img create -f qcow2 image0 20Gqemu-system-x86_64 --enable-kvm image0 -m 2048 -smp 2 -netdev tap,id=mynet0 -device virtio-net-pci,netdev=mynet0 -cdrom /home/qemutest/CentOS-6.4-x86_64-minimal.iso -boot dvncviewer :5900
qemu-system-x86_64 --enable-kvm image0 -m 2048 -smp 2 -netdev tap,id=mynet0 -device virtio-net-pci,netdev=mynet0
//#include <linux/linkage.h> /* For asmregparm */
//extern asmregparm long syscall_trace_enter(struct pt_regs *);
//extern asmregparm void syscall_trace_leave(struct pt_regs *);
extern long syscall_trace_enter(struct pt_regs *);
extern void syscall_trace_leave(struct pt_regs *);
typedef struct VirtIOmydevice {
VirtIODevice parent_obj;
//VirtQueue *ivq, *dvq, *svq;
VirtQueue *vq[2]; //new
uint32_t num_pages;
uint32_t actual;
uint64_t stats[VIRTIO_MYDEVICE_S_NR];
VirtQueueElement stats_vq_elem;
size_t stats_vq_offset;
QEMUTimer *stats_timer;
int64_t stats_last_update;
int64_t stats_poll_interval;
int status; //new
} VirtIOmydevice;
hw/virtio/virtio-mydevice.c
的
virtio_mydevice_device_init() 裡面去add virtio queue:
s->vq[0] = virtio_add_queue(vdev, 1024, virtio_mydevice_handle_output); s->vq[1] = virtio_add_queue(vdev, 1024, virtio_mydevice_handle_output);然後在virtio_mydevice_handle_output裡面去virtqueue_pop, virtqueue_push
由NVIDIA所推出的一種整合技術，是該公司對於GPGPU的正式名稱。透過這個技術，使用者可利用NVIDIA的GeForce 8以後的GPU和較新的Quadro GPU進行計算。亦是首次可以利用GPU作為C-編譯器的開發環境。NVIDIA行銷的時候，往往將編譯器與架構混合推廣，造成混亂。實際上，CUDA可以相容OpenCL或者自家的C-編譯器。無論是CUDA C-語言或是OpenCL，指令最終都會被驅動程式轉換成PTX代碼，交由顯示核心計算。簡單來講，我習慣把CUDA就看成與OpenCL一樣的地位，基本上CUDA就是個C/C++的extend語法，使用者可以使用一些run time API去直接對GPU做操作，真正底層由nvcc compiler 把CUDA code轉成PTX code， 再由GPU driver將PTX 轉成binary code到GPU 硬體運算單元去執行，因此上面這段wiki最後面有點小錯誤，應該是compiler 轉成PTX code再讓driver去handle底層binary code，因為PTX code只是個pseudo-assembly language噢～
#include <stdio.h> #include <stdlib.h> struct mytype { struct mytype *next; int key; }; struct mytype *mysort; int cmpfunc (const void * a, const void * b) { struct mytype* aa = (struct mytype*)a; struct mytype* bb = (struct mytype*)b; return (aa->key - bb->key); } int main() { mysort = (struct mytype*)malloc(sizeof(struct mytype*)*10); int i; for( i = 0; i < 10; i++) { mysort[i].key = 10-i; } printf("before sorting\n"); for( i = 0; i < 10; i++) printf("%d ", mysort[i].key); printf("\n"); qsort(mysort, 10, sizeof(struct mytype), cmpfunc); printf("after sorting\n"); for( i = 0; i < 10; i++) printf("%d ", mysort[i].key); printf("\n"); return 0; }
把程式碼貼到： http://formatmysourcecode.blogspot.tw/ 格式轉完後貼到HTML裡 然後要加的tag這裡有寫: http://google-code-prettify.googlecode.com/svn/trunk/README.html
<script src="https://google-code-prettify.googlecode.com/svn/loader/run_prettify.js"></script>
#include <linux/module.h> #include <linux/init.h> MODULE_LICENSE("Dual BSD/GPL"); static int hello_init(void) { printk(KERN_ALERT "Hello, world/n"); return 0; } static void hello_exit(void) { printk(KERN_ALERT "Goodbye, cruel world/n"); } module_init(hello_init); module_exit(hello_exit);
KVER = /lib/modules/`uname -r`/build CURDIR = $(shell pwd) # Kernel modules obj-m := hello.o build: kernel_modules kernel_modules: $(MAKE) -C $(KVER) M=$(CURDIR) modules clean: $(MAKE) -C $(KVER) M=$(CURDIR) clean
[root@guest0 ~]# yum update解決方法
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot find a valid baseurl for repo: base
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 127.0.0.1
#!/bin/sh
bridge=br0ifconfig $1 0.0.0.0 promisc up
brctl addif $bridge $1
#!/bin/sh
bridge=br0
brctl delif $bridge $1 || true
ifconfig $1 down
qemu-system-x86_64 --enable-kvm image_file -m 2048 -smp 2 -netdev tap,id=mynet0 -device virtio-net-pci,netdev=mynet0
DEVICE=eth0
HWADDR=52:54:00:12:34:56
IPADDR=10.222.112.2
GATEWAY=10.222.112.1
NETMASK=255.255.255.0
TYPE=Ethernet
UUID=3f979381-18b8-4a3e-8221-2f8379c8b79a
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none