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資源簡介

大學操作系統實驗中的Linux下虛存管理實驗,實現了多道程序控制、FIFO通信、多級頁表和LRU/LFU/FIFO/OPT等頁面淘汰算法。

資源截圖

代碼片段和文件信息

#include?
#include?
#include?
#include?
#include?“vm_global.h“

int?main()
{
FILE?*fp;
int?write_numi=0n=0;
char?c;
printf(“How?many?requests?do?you?want??“);
scanf(“%d“&n);
srand(time(NULL));
MemoryAccessRequestPtr?mem_request0;
mem_request0=(MemoryAccessRequestPtr)malloc(sizeof(MemoryAccessRequest));
//mkfifo(FIFOS_IFIFO|06660);
while(i {
if((fp=fopen(FIFO“a+“))==NULL)
{
//handle_error(FILE_OPEN_FAILED);
exit(1);
}
do_request(mem_request0);
printf(“Success?request?:?%d\n“++i);
write_num=fwrite(mem_request0sizeof(MemoryAccessRequest)1fp);
}
fclose(fp);
????return?0;
}
void?do_request(MemoryAccessRequestPtr?mem_request)
{

mem_request->virtual_address=rand()%VIRTUAL_MEMORY_SIZE;

switch?(rand()%3)
{
case?0: /*讀請求*/
mem_request->request_type=READ;
printf(“Produce?request:\nAddress:%u\tType:read\n“mem_request->virtual_address);
break;
case?1: /*寫請求*/
mem_request->request_type=WRITE;
mem_request->value=rand()%MAX_VALUE;
printf(“Produce?request:\nAddress:%u\tType:write\tvalue:%02X\n“mem_request->virtual_addressmem_request->value);
break;
case?2: /*執行請求*/
mem_request->request_type=EXECUTE;
printf(“Produce?request:\nAddress:%u\tType:execute\n“mem_request->virtual_address);
break;
default:
break;
}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????107??2009-04-27?12:58??項目文檔\readme.txt

?????文件????1067008??2009-04-25?10:24??項目文檔\操作系統實驗報告_實驗二[Linux].doc

?????文件????????600??2009-04-22?14:02??工程源代碼\auxiliary_space

?????文件????????132??2009-04-25?10:28??工程源代碼\makefile

?????文件????????107??2009-04-27?12:58??工程源代碼\readme.txt

?????文件???????1414??2009-04-24?12:25??工程源代碼\vm_fifo.c

?????文件???????4488??2009-05-04?10:29??工程源代碼\vm_global.h

?????文件??????12350??2009-05-04?14:46??工程源代碼\vm_simulator.c

????.......??????9799??2009-05-04?23:57??可執行文件\fifo.out

????.......?????14380??2009-05-04?23:57??可執行文件\vmem.out

?????目錄??????????0??2009-05-02?20:54??項目文檔

?????目錄??????????0??2009-05-04?23:57??工程源代碼

?????目錄??????????0??2009-05-04?23:57??可執行文件

-----------?---------??----------?-----??----

??????????????1110385????????????????????13


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