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/*
** ATOP - System & Process Monitor
**
** The program 'atop' offers the possibility to view the activity of
** the system on system-level as well as process-level.
**
** Include-file describing cgroup-level counters to be maintained.
** ================================================================
** Author: Gerlof Langeveld
** E-mail: gerlof.langeveld@atoptool.nl
** Date: January/February 2024
**
** This program is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 2, or (at your option) any
** later version.
**
** This program is distributed in the hope that it will be useful, but
** WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU General Public License for more details.
*/
#ifndef __CGROUPS__
#define __CGROUPS__
// structure containing general info and metrics per cgroup (directory)
//
struct cstat {
// GENERAL INFO
struct cggen {
int structlen; // struct length including rounded name
int sequence; // sequence number in chain/array
int parentseq; // parent sequence number in chain/array
int depth; // cgroup tree depth starting from 0
int nprocs; // number of processes in cgroup
int procsbelow; // number of processes in cgroups below
int namelen; // cgroup name length (at end of struct)
int fullnamelen; // cgroup path length
int ifuture[4];
long namehash; // cgroup name hash of
// full path name excluding slashes
long lfuture[4];
} gen;
// CONFIGURATION INFO
struct cgconf {
int cpuweight; // -1=max, -2=undefined
int cpumax; // -1=max, -2=undefined (perc)
count_t memmax; // -1=max, -2=undefined (pages)
count_t swpmax; // -1=max, -2=undefined (pages)
int dskweight; // -1=max, -2=undefined
int ifuture[5];
count_t cfuture[5];
} conf;
// CPU STATISTICS
struct cgcpu {
count_t utime; // time user text (usec) -1=undefined
count_t stime; // time system text (usec) -1=undefined
count_t somepres; // some pressure (microsec)
count_t fullpres; // full pressure (microsec)
count_t cfuture[5];
} cpu;
// MEMORY STATISTICS
struct cgmem {
count_t current; // current memory (pages) -1=undefined
count_t anon; // anonymous memory (pages) -1=undefined
count_t file; // file memory (pages) -1=undefined
count_t kernel; // kernel memory (pages) -1=undefined
count_t shmem; // shared memory (pages) -1=undefined
count_t somepres; // some pressure (microsec)
count_t fullpres; // full pressure (microsec)
count_t cfuture[5];
} mem;
// DISK I/O STATISTICS
struct cgdsk {
count_t rbytes; // total bytes read on all physical disks
count_t wbytes; // total bytes written on all physical disks
count_t rios; // total read I/Os on all physical disks
count_t wios; // total write I/Os on all physical disks
count_t somepres; // some pressure (microsec)
count_t fullpres; // full pressure (microsec)
count_t cfuture[5];
} dsk;
// cgroup name with variable length
char cgname[];
};
// structure to be used for chaining the cstat struct and pid list
// that are maintained per cgroup
//
struct cgchainer {
struct cgchainer *next;
struct cgchainer *hashnext;
struct cstat *cstat; // cgroup info and stats
pid_t *proclist; // PID list of cgroup
unsigned long vlinemask; // bit list for tree drawing:
// bit '1' for continuous line
char stub; // boolean for tree drawing:
// true means corner
};
#define CGRMAXDEPTH (sizeof(unsigned long)*8) // #bits in vlinemask
// structure to be used for printing a merged list
// of cgroups and processes
//
struct tstat;
struct cglinesel {
struct cgchainer *cgp; // always filled with reference to cgroup
struct tstat *tsp; // filled for process info, otherwise NULL
};
int mergecgrouplist(struct cglinesel **, int,
struct cgchainer **, int,
struct tstat **, int, char);
int cgroupv2support(void);
void photocgroup(void);
int deviatcgroup(struct cgchainer **, int *);
struct cgchainer **cgsort(struct cgchainer *, int, char);
char *cggetpath(struct cgchainer *, struct cgchainer *, int);
void cgwipecur(void);
void cgbuildarray(struct cgchainer **, char *, char *, int);
void cgfillref(struct devtstat *, struct cgchainer *, int, int);
#endif
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