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procps/proc/sysinfo.h

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big header clean-up
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#ifndef PROC_SYSINFO_H
#define PROC_SYSINFO_H
fabian.frederick@gmx.fr vmstat code
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#include <sys/types.h>
Use <dirent.h> instead of <sys/dir.h> Using <dirent.h> and struct dirent instead of <sys/dir.h> and struct direct is preferred and works on Android which lacks sys/dir.h. See: http://pubs.opengroup.org/onlinepubs/009695399/basedefs/dirent.h.html
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#include <dirent.h>
c99
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#include "procps.h"
big header clean-up
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EXTERN_C_BEGIN
64-bit time for Linux 2.5.xx
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extern unsigned long long Hertz; /* clock tick frequency */
top hotplug memory support Another patch from Jim for top to support hot-pluggable memory. Not fully tested on real hot-pluggable memory because neither of us have it
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extern long smp_num_cpus; /* number of CPUs */
extern int have_privs; /* boolean, true if setuid or similar */
library: tweak newly added MemAvailable fall-back code This commit just ensures recalculation of some amounts for iterative processes, like top. It also trades some repeated runtime calls to sysconf for a one time cost. Reference(s): http://www.freelists.org/post/procps/systemd-support-to-library,7 . fall-back calculations commit b779855cf15d68f9038ff1809db18c0788e9ae70 Signed-off-by: Jim Warner <james.warner@comcast.net>
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extern long page_bytes; /* this architecture's bytes per page */
procps 010114
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new Linux 2.6.0-test4 CPU stats shown
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#if 0
procps 010114
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#define JT double
top: show CPU time stolen from a virtual machine
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extern void eight_cpu_numbers(JT *uret, JT *nret, JT *sret, JT *iret, JT *wret, JT *xret, JT *yret, JT *zret);
procps 010114
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#undef JT
new Linux 2.6.0-test4 CPU stats shown
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#endif
procps 010114
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extern int uptime (double *uptime_secs, double *idle_secs);
Read the system boot time from /proc instead of computing Read the time of system boot from /proc/stat (entry: btime) instead of computing it as the difference between the current time and the uptime. This is the only way to get a consistent result which won't possibly change from one run to the next. The problems with the original code were: * Both the current time and the uptime are rounded down to the second, but the system doesn't boot on an integer second value so they do not tick at the same moment. Thus, the rounding errors can cause a one second difference from one run to the next. * We can't read the uptime and the current time at the exact same moment anyway, so the time difference we compute is bound to be inaccurate. Bug-Redhat: https://bugzilla.redhat.com/show_bug.cgi?id=222251 Author: Jean Delvare <jdelvare@suse.de> Reviewed-by: Craig Small <csmall@debian.org>
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extern unsigned long getbtime(void);
procps 010114
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extern void loadavg(double *av1, double *av5, double *av15);
library: properly handle memory used by tmpfs tmpfs has become much more widely used since distributions use it for /tmp (Fedora 18+). In /proc/meminfo, memory used by tmpfs is accounted into "Cached" (aka "NR_FILE_PAGES", http://lxr.free-electrons.com/source/mm/shmem.c#L301 ). The tools just pass it on, so what top, free and vmstat report as "cached" is the sum of page cache and tmpfs. free has the extremely useful "-/+ buffers/cache" output. However, now that tmpfs is accounted into "cached", those numbers are way off once you have big files in /tmp. Fortunately, kernel 2.6.32 introduces "Shmem", which makes tmpfs memory usage accessible from userspace ( https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4b02108ac1b3354a22b0d83c684797692efdc395 ). This patch substracts Shmem from Cached to get the actual page cache memory. This makes both issues mentioned above disappear. For older kernels, Shmem is not available (hence zero) and this patch is no-op. Additionally: * Update the man pages of free and vmstat to explain what is happening * Finally drop "MemShared" from the /proc/meminfo parser, it has been dead for 10+ years and is only causing confusion ( removed in kernel 2.5.54, see https://git.kernel.org/cgit/linux/kernel/git/tglx/history.git/commit/?id=fe04e9451e5a159247cf9f03c615a4273ac0c571 )
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/* Shmem in 2.6.32+ */
malloc error
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extern unsigned long kb_main_shared;
procps 010114
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/* old but still kicking -- the important stuff */
malloc error
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extern unsigned long kb_main_buffers;
extern unsigned long kb_main_cached;
extern unsigned long kb_main_free;
extern unsigned long kb_main_total;
extern unsigned long kb_swap_free;
extern unsigned long kb_swap_total;
procps 010114
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/* recently introduced */
malloc error
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extern unsigned long kb_high_free;
extern unsigned long kb_high_total;
extern unsigned long kb_low_free;
extern unsigned long kb_low_total;
free: support for MemAvailable This commit adds a new switch -a/--available that appends a new column called 'available' to the output. The column displays an estimation of how much memory is available for starting new applications, without swapping. Unlike the data provided by the 'cached' or 'free' fields, this field takes into account page cache and also that not all reclaimable memory slabs will be reclaimed due to items being in use.
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extern unsigned long kb_main_available;
procps 010114
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/* 2.4.xx era */
malloc error
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extern unsigned long kb_active;
extern unsigned long kb_inact_laundry; // grrr...
extern unsigned long kb_inact_dirty;
extern unsigned long kb_inact_clean;
extern unsigned long kb_inact_target;
extern unsigned long kb_swap_cached; /* late 2.4+ */
procps 010114
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/* derived values */
malloc error
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extern unsigned long kb_swap_used;
extern unsigned long kb_main_used;
handle Linux 2.5.xx ABI
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/* 2.5.41+ */
malloc error
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extern unsigned long kb_writeback;
extern unsigned long kb_slab;
extern unsigned long nr_reversemaps;
extern unsigned long kb_committed_as;
extern unsigned long kb_dirty;
extern unsigned long kb_inactive;
extern unsigned long kb_mapped;
extern unsigned long kb_pagetables;
procps 010114
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/proc/stat for 1024 CPUs
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#define BUFFSIZE (64*1024)
fabian.frederick@gmx.fr vmstat code
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typedef unsigned long long jiff;
Change restrict to __restrict in public includes procps automake defines restrict which means the binaries for procps binaries compile. However external programs may not of defined restrict which means they will not complie if they include files found in /usr/include/proc. Includes from libc6 use __restrict and if is good enough for them, its good enough for us.
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extern void getstat(jiff *__restrict cuse, jiff *__restrict cice, jiff *__restrict csys, jiff *__restrict cide, jiff *__restrict ciow, jiff *__restrict cxxx, jiff *__restrict cyyy, jiff *__restrict czzz,
unsigned long *__restrict pin, unsigned long *__restrict pout, unsigned long *__restrict s_in, unsigned long *__restrict sout,
unsigned *__restrict intr, unsigned *__restrict ctxt,
unsigned int *__restrict running, unsigned int *__restrict blocked,
unsigned int *__restrict btime, unsigned int *__restrict processes);
fabian.frederick@gmx.fr vmstat code
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procps 010114
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extern void meminfo(void);
handle Linux 2.5.xx ABI
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malloc error
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extern unsigned long vm_nr_dirty;
extern unsigned long vm_nr_writeback;
extern unsigned long vm_nr_pagecache;
extern unsigned long vm_nr_page_table_pages;
extern unsigned long vm_nr_reverse_maps;
extern unsigned long vm_nr_mapped;
extern unsigned long vm_nr_slab;
library: fallback MemAvailable evaluation if missing This commit adds support for fallback calculation of the MemAvailable field if not exported by the kernel. The MemAvailable field appeared in kernel 3.14, but it's possible to calculate it from other fields since 2.6.27 (splitLRU changes).
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extern unsigned long vm_nr_slab_reclaimable;
extern unsigned long vm_nr_slab_unreclaimable;
extern unsigned long vm_nr_active_file;
extern unsigned long vm_nr_inactive_file;
extern unsigned long vm_nr_free_pages;
malloc error
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extern unsigned long vm_pgpgin;
extern unsigned long vm_pgpgout;
extern unsigned long vm_pswpin;
extern unsigned long vm_pswpout;
extern unsigned long vm_pgalloc;
extern unsigned long vm_pgfree;
extern unsigned long vm_pgactivate;
extern unsigned long vm_pgdeactivate;
extern unsigned long vm_pgfault;
extern unsigned long vm_pgmajfault;
extern unsigned long vm_pgscan;
extern unsigned long vm_pgrefill;
extern unsigned long vm_pgsteal;
extern unsigned long vm_kswapd_steal;
extern unsigned long vm_pageoutrun;
extern unsigned long vm_allocstall;
handle Linux 2.5.xx ABI
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extern void vminfo(void);
diskstats and slabinfo
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typedef struct disk_stat{
unsigned long long reads_sectors;
unsigned long long written_sectors;
alignment
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char disk_name [16];
diskstats and slabinfo
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unsigned inprogress_IO;
alignment
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unsigned merged_reads;
unsigned merged_writes;
unsigned milli_reading;
diskstats and slabinfo
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unsigned milli_spent_IO;
alignment
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unsigned milli_writing;
got most of procps-3.1.11ff2.diff
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unsigned partitions;
alignment
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unsigned reads;
unsigned weighted_milli_spent_IO;
unsigned writes;
diskstats and slabinfo
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}disk_stat;
typedef struct partition_stat{
char partition_name [16];
alignment
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unsigned long long reads_sectors;
fix vmstat -d
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unsigned parent_disk; // index into a struct disk_stat array
diskstats and slabinfo
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unsigned reads;
unsigned writes;
vmstat -p <part> works and updated version to 3.3.1 configure.ac now set to 3.3.1 vmstat -p has not worked for a long time, this applies Debian patch vmstat_part_format, the details: Author: Daniel Novotny Description: The contents of /proc/diskstats have changed since 2.6.25 Changed PATH_MAX to 32 because its missing on hurd Bug-Redhat: https://bugzilla.redhat.com/show_bug.cgi?id=485243 Bug-Debian: http://bugs.debian.org/588677 Last-Update: 2010-11-17
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unsigned long long requested_writes;
diskstats and slabinfo
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}partition_stat;
got most of procps-3.1.11ff2.diff
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extern unsigned int getpartitions_num(struct disk_stat *disks, int ndisks);
diskstats and slabinfo
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extern unsigned int getdiskstat (struct disk_stat**,struct partition_stat**);
typedef struct slab_cache{
char name[48];
unsigned active_objs;
unsigned num_objs;
unsigned objsize;
unsigned objperslab;
}slab_cache;
extern unsigned int getslabinfo (struct slab_cache**);
GPLONLY_ and PID-related stuff
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extern unsigned get_pid_digits(void) FUNCTION;
top hotplug memory support Another patch from Jim for top to support hot-pluggable memory. Not fully tested on real hot-pluggable memory because neither of us have it
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extern void cpuinfo (void);
big header clean-up
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EXTERN_C_END
procps 010114
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#endif /* SYSINFO_H */
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