1b9ea61116
We read /proc/stat using a statically sized buffer. This was increased
to 64kB in 2005 via commit 777fcd3cf1 "/proc/stat for 1024 CPUs".
Unfortunately in 2020, 1024 CPUs is not enough for anyone. I have a
large machine where /proc/stat is 74kB, and vmstat gives incorrect
output.
Double the buffer to 128kB in the confidence that 2048 CPUs is actually
enough for anyone.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>
145 lines
4.7 KiB
C
145 lines
4.7 KiB
C
#ifndef PROC_SYSINFO_H
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#define PROC_SYSINFO_H
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#include <sys/types.h>
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#include <dirent.h>
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#include "procps.h"
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EXTERN_C_BEGIN
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extern unsigned long long Hertz; /* clock tick frequency */
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extern long smp_num_cpus; /* number of CPUs */
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extern int have_privs; /* boolean, true if setuid or similar */
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extern long page_bytes; /* this architecture's bytes per page */
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#if 0
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#define JT double
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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);
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#undef JT
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#endif
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extern int uptime (double *uptime_secs, double *idle_secs);
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extern unsigned long getbtime(void);
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extern void loadavg(double *av1, double *av5, double *av15);
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/* Shmem in 2.6.32+ */
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extern unsigned long kb_main_shared;
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/* old but still kicking -- the important stuff */
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extern unsigned long kb_main_buffers;
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extern unsigned long kb_main_cached;
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extern unsigned long kb_main_free;
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extern unsigned long kb_main_total;
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extern unsigned long kb_swap_free;
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extern unsigned long kb_swap_total;
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/* recently introduced */
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extern unsigned long kb_high_free;
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extern unsigned long kb_high_total;
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extern unsigned long kb_low_free;
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extern unsigned long kb_low_total;
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extern unsigned long kb_main_available;
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/* 2.4.xx era */
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extern unsigned long kb_active;
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extern unsigned long kb_inact_laundry; // grrr...
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extern unsigned long kb_inact_dirty;
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extern unsigned long kb_inact_clean;
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extern unsigned long kb_inact_target;
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extern unsigned long kb_swap_cached; /* late 2.4+ */
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/* derived values */
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extern unsigned long kb_swap_used;
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extern unsigned long kb_main_used;
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/* 2.5.41+ */
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extern unsigned long kb_writeback;
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extern unsigned long kb_slab;
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extern unsigned long nr_reversemaps;
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extern unsigned long kb_committed_as;
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extern unsigned long kb_dirty;
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extern unsigned long kb_inactive;
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extern unsigned long kb_mapped;
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extern unsigned long kb_pagetables;
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#define BUFFSIZE (128*1024)
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typedef unsigned long long jiff;
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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,
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unsigned long *__restrict pin, unsigned long *__restrict pout, unsigned long *__restrict s_in, unsigned long *__restrict sout,
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unsigned *__restrict intr, unsigned *__restrict ctxt,
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unsigned int *__restrict running, unsigned int *__restrict blocked,
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unsigned int *__restrict btime, unsigned int *__restrict processes);
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extern void meminfo(void);
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extern unsigned long vm_nr_dirty;
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extern unsigned long vm_nr_writeback;
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extern unsigned long vm_nr_pagecache;
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extern unsigned long vm_nr_page_table_pages;
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extern unsigned long vm_nr_reverse_maps;
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extern unsigned long vm_nr_mapped;
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extern unsigned long vm_nr_slab;
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extern unsigned long vm_nr_slab_reclaimable;
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extern unsigned long vm_nr_slab_unreclaimable;
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extern unsigned long vm_nr_active_file;
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extern unsigned long vm_nr_inactive_file;
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extern unsigned long vm_nr_free_pages;
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extern unsigned long vm_pgpgin;
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extern unsigned long vm_pgpgout;
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extern unsigned long vm_pswpin;
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extern unsigned long vm_pswpout;
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extern unsigned long vm_pgalloc;
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extern unsigned long vm_pgfree;
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extern unsigned long vm_pgactivate;
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extern unsigned long vm_pgdeactivate;
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extern unsigned long vm_pgfault;
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extern unsigned long vm_pgmajfault;
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extern unsigned long vm_pgscan;
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extern unsigned long vm_pgrefill;
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extern unsigned long vm_pgsteal;
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extern unsigned long vm_kswapd_steal;
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extern unsigned long vm_pageoutrun;
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extern unsigned long vm_allocstall;
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extern void vminfo(void);
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typedef struct disk_stat{
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unsigned long long reads_sectors;
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unsigned long long written_sectors;
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char disk_name [32];
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unsigned inprogress_IO;
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unsigned merged_reads;
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unsigned merged_writes;
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unsigned milli_reading;
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unsigned milli_spent_IO;
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unsigned milli_writing;
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unsigned partitions;
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unsigned reads;
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unsigned weighted_milli_spent_IO;
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unsigned writes;
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}disk_stat;
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typedef struct partition_stat{
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char partition_name [35];
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unsigned long long reads_sectors;
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unsigned parent_disk; // index into a struct disk_stat array
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unsigned reads;
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unsigned writes;
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unsigned long long requested_writes;
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}partition_stat;
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extern unsigned int getpartitions_num(struct disk_stat *disks, int ndisks);
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extern unsigned int getdiskstat (struct disk_stat**,struct partition_stat**);
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typedef struct slab_cache{
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char name[48];
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unsigned active_objs;
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unsigned num_objs;
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unsigned objsize;
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unsigned objperslab;
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}slab_cache;
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extern unsigned int getslabinfo (struct slab_cache**);
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extern unsigned get_pid_digits(void) FUNCTION;
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extern void cpuinfo (void);
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EXTERN_C_END
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#endif /* SYSINFO_H */
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