프로세서 정보 얻기

솔라리스의 메모리 체크 방법은 /proc 밑에 프로세서 별로 생성되는 프로세스 정보 파일을 읽어들이는 것이다.

아래 파일 포맷은 아래 구조체 형식으로 정보들이 들어있으며, 구조체로 읽어들이면 처리하기 편하다..

 

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

 

#include PRFNSZ 1024
#include PRARGSZ 1024

 

typedef struct {
....int     pr_flag;        /* process flags */
....int     pr_nlwp;        /* number of lwps in process */
....pid_t   pr_pid;         /* unique process id */
....pid_t   pr_ppid;        /* process id of parent */
....pid_t   pr_pgid;        /* pid of process group leader */
....pid_t   pr_sid;         /* session id */
....uid_t   pr_uid;         /* real user id */
....uid_t   pr_euid;        /* effective user id */
....gid_t   pr_gid;         /* real group id */
....gid_t   pr_egid;        /* effective group id */
....uintptr_t pr_addr;      /* address of process */
....size_t  pr_size;        /* size of process image in Kbytes */
....size_t  pr_rssize;      /* resident set size in Kbytes */
....size_t  pr_pad1;
....dev_t   pr_ttydev;      /* controlling tty device(or PRNODEV)*/
......../* The following percent numbers are 16-bit binary */
......../* fractions [0 .. 1] with the binary point to the */
......../* right of the high-order bit (1.0 == 0x8000) */
....ushort_t pr_pctcpu;     /* % of recent cpu time used by all lwps */
....ushort_t pr_pctmem;     /* % of system memory used by process */
....timestruc_t pr_start;   /* process start time, from the epoch */
....timestruc_t pr_time;    /* usr+sys cpu time for this process */
....timestruc_t pr_ctime;   /* usr+sys cpu time for reaped children */
....char    pr_fname[PRFNSZ];       /* name of execed file */
....char    pr_psargs[PRARGSZ];     /* initial characters of arg list */
....int     pr_wstat;       /* if zombie, the wait() status */
....int     pr_argc;        /* initial argument count */
....uintptr_t pr_argv;      /* address of initial argument vector */
....uintptr_t pr_envp;      /* address of initial environment vector */
....char    pr_dmodel;      /* data model of the process */
....char    pr_pad2[3];
....int     pr_filler[7];   /* reserved for future use */
} psinfo;

 

int main(int argc, char *argv[])
{
....int m_pid, fd;
....char tmp1[1024];
....psinfo pinfo;

 

....memset(tmp1, 0x00, sizeof(tmp1));

 

....m_pid = atoi(argv[1]);

 

....sprintf(tmp1, "/proc/%d/psinfo", m_pid);

 

....fd = open(tmp1, O_RDONLY);

....read(fd, (void *)&pinfo, sizeof(pinfo));

 

..../* ----------- INFO PRINT --------------- */
....printf(" Process id <%d>\\n", pinfo.pr_pid);
....printf(" Parent process id <%d>\\n", pinfo.pr_ppid);
....printf(" Process image size (Kbyte) <%d>\\n", pinfo.pr_size);
....printf(" Resident set size (Kbyte) <%d>\\n", pinfo.pr_rssize); 
....printf(" Process cpu used <%d>\\n", pinfo.pr_pctcpu);
....printf(" Process memory used <%d>\\n", pinfo.pr_pctmem);
....printf(" Execute File name <%s>\\n", pinfo.pr_fname);
 
....return 0;
}