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rusage.c
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rusage.c
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/* -*- Mode: C; Character-encoding: utf-8; -*- */
/* Copyright (C) 2004-2019 beingmeta, inc.
Copyright (C) 2020-2022 Kenneth Haase (ken.haase@alum.mit.edu)
This file is part of the libu8 UTF-8 unicode library.
This program comes with absolutely NO WARRANTY, including implied
warranties of merchantability or fitness for any particular
purpose.
Use, modification, and redistribution of this program is permitted
under any of the licenses found in the the 'licenses' directory
accompanying this distribution, including the GNU General Public License
(GPL) Version 2 or the GNU Lesser General Public License.
*/
#include "libu8/u8source.h"
#include "libu8/libu8.h"
#include "libu8/u8streamio.h"
#include "libu8/u8printf.h"
#ifndef _FILEINFO
#define _FILEINFO __FILE__
#endif
#include "libu8/libu8.h"
#include "libu8/u8rusage.h"
/* We use stdio to open the /proc file system */
#include <stdio.h>
#if ((HAVE_MALLINFO)||(HAVE_MSTATS))
#if (HAVE_MALLOC_H)
#include <malloc.h>
#elif (HAVE_SYS_MALLOC_H)
#include <malloc/malloc.h>
#elif (HAVE_SYS_MALLOC_H)
#include <sys/malloc.h>
#endif
#endif
#include <errno.h>
#define U8_PROCFS_BUFSIZE 1024
#define U8_PROCFS_STATM_VMSIZE_OFF 0
#define U8_PROCFS_STATM_RSS_OFF 1
/* Getting rusage */
U8_EXPORT
/* u8_getrusage:
Arguments: a pointer to an rusage structure
Returns: -1 on error
Gets rusage information, covering for holes in various
implementations (currently just Linux) */
int u8_getrusage(int who,struct rusage *r)
{
#if HAVE_GETRUSAGE
if (getrusage(who,r)<0) return -1;
#if U8_RUSAGE_PROCFS_PATCH
{
FILE *f=fopen("/proc/self/statm","r");
int retval;
long long total, res, shared, textsize, data, library, dirty_size;
retval=fscanf(f,"%Ld %Ld %Ld %Ld %Ld %Ld %Ld",
&total,&res,&shared,
&textsize,&library,&data,&dirty_size);
if (retval<0) {
errno=0;
return -1;}
/* These numbers are not entirely correct, but they're more
correct than 0! */
r->ru_idrss=total-(shared);
r->ru_maxrss=res;
r->ru_ixrss=shared;
fclose(f);
errno=0;
return 1;
}
#endif
#else
u8_seterr(_("no OS support"),"u8_getrusage",NULL);
return -1;
#endif
return 1;
}
static U8_MAYBE_UNUSED ssize_t procfs_meminfo(int off)
{
#if U8_RUSAGE_PROCFS_PATCH
FILE *f=fopen("/proc/self/statm","r");
size_t pagesize=u8_getpagesize();
if (f==NULL) {
errno=0;
return 0;}
else {
char buf[U8_PROCFS_BUFSIZE], *tokstate=NULL;
char *s=fgets(buf,U8_PROCFS_BUFSIZE,f);
char *tok=strtok_r(buf," \t",&tokstate);
int i=0;
fclose(f); errno=0;
if (s==NULL) return 0;
else while (tok!=NULL) {
if (i==off) {
long long vsize=atoll(tok);
errno=0;
return vsize*pagesize;}
else i++;
tok=strtok_r(NULL," \t",&tokstate);}
errno=0;
return 0;}
#else
return 0;
#endif
}
U8_EXPORT ssize_t u8_memusage()
{
#if __linux
return procfs_meminfo(U8_PROCFS_STATM_RSS_OFF);
#elif (HAVE_MALLINFO)
struct mallinfo minfo=mallinfo();
return minfo.uordblks;
#elif (HAVE_MSTATS)
struct mstats minfo=mstats();
return minfo.bytes_used;
#else
return procfs_meminfo(U8_PROCFS_STATM_RSS_OFF);
#endif
}
U8_EXPORT ssize_t u8_vmemusage()
{
#if __linux
return procfs_meminfo(U8_PROCFS_STATM_VMSIZE_OFF);
#elif (HAVE_MALLINFO)
struct mallinfo minfo=mallinfo();
return minfo.arena;
#elif (HAVE_MSTATS)
struct mstats minfo=mstats();
return minfo.bytes_used;
#else
return procfs_meminfo(U8_PROCFS_STATM_VMSIZE_OFF);
#endif
}
U8_EXPORT ssize_t u8_physmem()
{
#if ((HAVE_SYSCONF)&&(defined(_SC_PAGESIZE))&&(defined(_SC_PHYS_PAGES)))
size_t pagesize=sysconf(_SC_PAGESIZE);
return sysconf(_SC_PHYS_PAGES)*pagesize;
#else
u8_seterr(_("NotSupported"),"u8_physmem",NULL);
return -1;
#endif
}
static int avphysmem_warning=0;
U8_EXPORT ssize_t u8_avphysmem()
{
#if ((HAVE_SYSCONF)&&(defined(_SC_PAGESIZE))&&(defined(_SC_AVPHYS_PAGES)))
size_t pagesize=sysconf(_SC_PAGESIZE);
return sysconf(_SC_AVPHYS_PAGES)*pagesize;
#else
if (avphysmem_warning==0) {
u8_log(LOG_INFO,_("Unsupported"),"%s; %s",
"No SYSCONF support for available physical memory info",
"returning all physical memory");
avphysmem_warning=1;}
return u8_physmem();
#endif
}
U8_EXPORT double u8_memload()
{
#if ((HAVE_SYSCONF)&&(defined(_SC_PAGESIZE))&&(defined(_SC_PHYS_PAGES)))
/* ssize_t pagesize=sysconf(_SC_PAGESIZE); */
ssize_t memuse=u8_memusage();
ssize_t availmem=u8_avphysmem();
if ((memuse<0)||(availmem<0)) {
u8_seterr("Unsupported","u8_mempct",NULL);
return -1;}
else return (memuse/availmem)*100;
#else
u8_seterr(_("NotSupported"),"u8_physmem",NULL);
return -1;
#endif
}
U8_EXPORT double u8_vmemload()
{
#if ((HAVE_SYSCONF)&&(defined(_SC_PAGESIZE))&&(defined(_SC_PHYS_PAGES)))
/* ssize_t pagesize=sysconf(_SC_PAGESIZE); */
ssize_t vmemuse=u8_vmemusage();
ssize_t availmem=u8_avphysmem();
if ((vmemuse<0)||(availmem<0)) {
u8_seterr("Unsupported","u8_mempct",NULL);
return -1;}
else return (vmemuse/availmem)*100;
#else
u8_seterr(_("NotSupported"),"u8_physmem",NULL);
return -1;
#endif
}
U8_EXPORT u8_string u8_rusage_string(struct rusage *r)
{
struct U8_OUTPUT out;
U8_INIT_STATIC_OUTPUT(out,256);
u8_printf(&out,"total=%f",
((double)(r->ru_utime.tv_sec))+
((double)(r->ru_stime.tv_sec))+
(((double)(r->ru_utime.tv_usec))/1000000)+
(((double)(r->ru_stime.tv_usec))/1000000));
u8_printf(&out,",user=%f",
((double)(r->ru_utime.tv_sec))+
(((double)(r->ru_utime.tv_usec))/1000000));
u8_printf(&out,",system=%f",
((double)(r->ru_stime.tv_sec))+
(((double)(r->ru_stime.tv_usec))/1000000));
if (r->ru_maxrss) u8_printf(&out,",maxrss=%ld",r->ru_maxrss);
if (r->ru_ixrss) u8_printf(&out,",ixrss=%ld",r->ru_ixrss);
if (r->ru_idrss) u8_printf(&out,",idrss=%ld",r->ru_idrss);
if (r->ru_isrss) u8_printf(&out,",isrss=%ld",r->ru_isrss);
if (r->ru_minflt) u8_printf(&out,",minflt=%ld",r->ru_minflt);
if (r->ru_majflt) u8_printf(&out,",majflt=%ld",r->ru_majflt);
if (r->ru_nswap) u8_printf(&out,",nswap=%ld",r->ru_nswap);
if (r->ru_inblock) u8_printf(&out,",inblock=%ld",r->ru_inblock);
if (r->ru_oublock) u8_printf(&out,",oublock=%ld",r->ru_oublock);
if (r->ru_msgsnd) u8_printf(&out,",msgsnd=%ld",r->ru_msgsnd);
if (r->ru_msgrcv) u8_printf(&out,",msgrcv=%ld",r->ru_msgrcv);
if (r->ru_nsignals) u8_printf(&out,",nsignals=%ld",r->ru_nsignals);
if (r->ru_nvcsw) u8_printf(&out,",vcsw=%ld",r->ru_nvcsw);
if (r->ru_nivcsw) u8_printf(&out,",ivcsw=%ld",r->ru_nivcsw);
return out.u8_outbuf;
}
/* Initialization function (just records source file info) */
void init_rusage_c()
{
u8_register_source_file(_FILEINFO);
}
/* Emacs local variables
;;; Local variables: ***
;;; compile-command: "make debugging;" ***
;;; indent-tabs-mode: nil ***
;;; End: ***
*/