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procps/proc/vmstat.c
Jim Warner e524e48138 library: eliminate distorted history 1st time switches 
Upon reflection, at the point where the 'priming read'
was introduced, any possibility of history distortions
was also eliminated.  This was true because all of the
'old' (zeroed) data will have been replaced with 'new'
data whenever a user finally calls get, select & reap.

Thus, any DELTA values will automatically reflect that
interval between 'new' and subsequent retrieval calls.

[ diskstats didn't actually employ a 1st time switch ]
[ like the others so we have changed a comment only. ]
[ but that module will retain something similar used ]
[ inside node_update whenever a new node is created. ]

Reference(s):
. priming read added to slabinfo
commit 5d5a52a380
. priming read added to diskstats
commit ecd64f4445
. priming read added to meminfo, stat, vmstat
commit 1a2b62c779

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-01-05 06:48:38 +11:00

1315 lines
54 KiB
C
Raw Blame History

/*
* libprocps - Library to read proc filesystem
*
* Copyright (C) 1995 Martin Schulze <joey@infodrom.north.de>
* Copyright (C) 1996 Charles Blake <cblake@bbn.com>
* Copyright (C) 2003 Albert Cahalan
* Copyright (C) 2015 Craig Small <csmall@enc.com.au>
* Copyright (C) 2016 Jim Warner <james.warner@comcast.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <errno.h>
#include <fcntl.h>
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <proc/procps-private.h>
#include <proc/vmstat.h>
#define VMSTAT_FILE "/proc/vmstat"
/*
* Perhaps someday we'll all learn what is in these fields. But |
* that might require available linux documentation progressing |
* beyond a state that was acknowledged in the following thread |
*
* http://www.spinics.net/lists/linux-man/msg09096.html
*/
struct vmstat_data {
unsigned long allocstall;
unsigned long balloon_deflate;
unsigned long balloon_inflate;
unsigned long balloon_migrate;
unsigned long compact_fail;
unsigned long compact_free_scanned;
unsigned long compact_isolated;
unsigned long compact_migrate_scanned;
unsigned long compact_stall;
unsigned long compact_success;
unsigned long drop_pagecache;
unsigned long drop_slab;
unsigned long htlb_buddy_alloc_fail;
unsigned long htlb_buddy_alloc_success;
unsigned long kswapd_high_wmark_hit_quickly;
unsigned long kswapd_inodesteal;
unsigned long kswapd_low_wmark_hit_quickly;
unsigned long nr_active_anon;
unsigned long nr_active_file;
unsigned long nr_alloc_batch;
unsigned long nr_anon_pages;
unsigned long nr_anon_transparent_hugepages;
unsigned long nr_bounce;
unsigned long nr_dirtied;
unsigned long nr_dirty;
unsigned long nr_dirty_background_threshold;
unsigned long nr_dirty_threshold;
unsigned long nr_file_pages;
unsigned long nr_free_cma;
unsigned long nr_free_pages;
unsigned long nr_inactive_anon;
unsigned long nr_inactive_file;
unsigned long nr_isolated_anon;
unsigned long nr_isolated_file;
unsigned long nr_kernel_stack;
unsigned long nr_mapped;
unsigned long nr_mlock;
unsigned long nr_pages_scanned; // note: alphabetic WHEN capitalized (as w/ enum)
unsigned long nr_page_table_pages; // note: alphabetic WHEN capitalized (as w/ enum)
unsigned long nr_shmem;
unsigned long nr_slab_reclaimable;
unsigned long nr_slab_unreclaimable;
unsigned long nr_unevictable;
unsigned long nr_unstable;
unsigned long nr_vmscan_immediate_reclaim;
unsigned long nr_vmscan_write;
unsigned long nr_writeback;
unsigned long nr_writeback_temp;
unsigned long nr_written;
unsigned long numa_foreign;
unsigned long numa_hint_faults;
unsigned long numa_hint_faults_local;
unsigned long numa_hit;
unsigned long numa_huge_pte_updates;
unsigned long numa_interleave;
unsigned long numa_local;
unsigned long numa_miss;
unsigned long numa_other;
unsigned long numa_pages_migrated;
unsigned long numa_pte_updates;
unsigned long pageoutrun;
unsigned long pgactivate;
unsigned long pgalloc_dma;
unsigned long pgalloc_dma32;
unsigned long pgalloc_movable;
unsigned long pgalloc_normal;
unsigned long pgdeactivate;
unsigned long pgfault;
unsigned long pgfree;
unsigned long pginodesteal;
unsigned long pgmajfault;
unsigned long pgmigrate_fail;
unsigned long pgmigrate_success;
unsigned long pgpgin;
unsigned long pgpgout;
unsigned long pgrefill_dma;
unsigned long pgrefill_dma32;
unsigned long pgrefill_movable;
unsigned long pgrefill_normal;
unsigned long pgrotated;
unsigned long pgscan_direct_dma;
unsigned long pgscan_direct_dma32;
unsigned long pgscan_direct_movable;
unsigned long pgscan_direct_normal;
unsigned long pgscan_direct_throttle;
unsigned long pgscan_kswapd_dma;
unsigned long pgscan_kswapd_dma32;
unsigned long pgscan_kswapd_movable;
unsigned long pgscan_kswapd_normal;
unsigned long pgsteal_direct_dma;
unsigned long pgsteal_direct_dma32;
unsigned long pgsteal_direct_movable;
unsigned long pgsteal_direct_normal;
unsigned long pgsteal_kswapd_dma;
unsigned long pgsteal_kswapd_dma32;
unsigned long pgsteal_kswapd_movable;
unsigned long pgsteal_kswapd_normal;
unsigned long pswpin;
unsigned long pswpout;
unsigned long slabs_scanned;
unsigned long thp_collapse_alloc;
unsigned long thp_collapse_alloc_failed;
unsigned long thp_fault_alloc;
unsigned long thp_fault_fallback;
unsigned long thp_split;
unsigned long thp_zero_page_alloc;
unsigned long thp_zero_page_alloc_failed;
unsigned long unevictable_pgs_cleared;
unsigned long unevictable_pgs_culled;
unsigned long unevictable_pgs_mlocked;
unsigned long unevictable_pgs_munlocked;
unsigned long unevictable_pgs_rescued;
unsigned long unevictable_pgs_scanned;
unsigned long unevictable_pgs_stranded;
unsigned long workingset_activate;
unsigned long workingset_nodereclaim;
unsigned long workingset_refault;
unsigned long zone_reclaim_failed;
};
struct vmstat_hist {
struct vmstat_data new;
struct vmstat_data old;
};
struct stacks_extent {
int ext_numstacks;
struct stacks_extent *next;
struct vmstat_stack **stacks;
};
struct vmstat_info {
int refcount;
int vmstat_fd;
int dirty_stacks;
struct vmstat_hist hist;
int numitems;
enum vmstat_item *items;
struct stacks_extent *extents;
struct hsearch_data hashtab;
struct vmstat_result get_this;
};
// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
#define setNAME(e) set_vmstat_ ## e
#define setDECL(e) static void setNAME(e) \
(struct vmstat_result *R, struct vmstat_hist *H)
// regular assignment
#define REG_set(e,x) setDECL(e) { R->result.ul_int = H->new . x; }
// delta assignment
#define HST_set(e,x) setDECL(e) { R->result.sl_int = ( H->new . x - H->old. x ); }
setDECL(noop) { (void)R; (void)H; }
setDECL(extra) { (void)R; (void)H; }
REG_set(ALLOCSTALL, allocstall)
REG_set(BALLOON_DEFLATE, balloon_deflate)
REG_set(BALLOON_INFLATE, balloon_inflate)
REG_set(BALLOON_MIGRATE, balloon_migrate)
REG_set(COMPACT_FAIL, compact_fail)
REG_set(COMPACT_FREE_SCANNED, compact_free_scanned)
REG_set(COMPACT_ISOLATED, compact_isolated)
REG_set(COMPACT_MIGRATE_SCANNED, compact_migrate_scanned)
REG_set(COMPACT_STALL, compact_stall)
REG_set(COMPACT_SUCCESS, compact_success)
REG_set(DROP_PAGECACHE, drop_pagecache)
REG_set(DROP_SLAB, drop_slab)
REG_set(HTLB_BUDDY_ALLOC_FAIL, htlb_buddy_alloc_fail)
REG_set(HTLB_BUDDY_ALLOC_SUCCESS, htlb_buddy_alloc_success)
REG_set(KSWAPD_HIGH_WMARK_HIT_QUICKLY, kswapd_high_wmark_hit_quickly)
REG_set(KSWAPD_INODESTEAL, kswapd_inodesteal)
REG_set(KSWAPD_LOW_WMARK_HIT_QUICKLY, kswapd_low_wmark_hit_quickly)
REG_set(NR_ACTIVE_ANON, nr_active_anon)
REG_set(NR_ACTIVE_FILE, nr_active_file)
REG_set(NR_ALLOC_BATCH, nr_alloc_batch)
REG_set(NR_ANON_PAGES, nr_anon_pages)
REG_set(NR_ANON_TRANSPARENT_HUGEPAGES, nr_anon_transparent_hugepages)
REG_set(NR_BOUNCE, nr_bounce)
REG_set(NR_DIRTIED, nr_dirtied)
REG_set(NR_DIRTY, nr_dirty)
REG_set(NR_DIRTY_BACKGROUND_THRESHOLD, nr_dirty_background_threshold)
REG_set(NR_DIRTY_THRESHOLD, nr_dirty_threshold)
REG_set(NR_FILE_PAGES, nr_file_pages)
REG_set(NR_FREE_CMA, nr_free_cma)
REG_set(NR_FREE_PAGES, nr_free_pages)
REG_set(NR_INACTIVE_ANON, nr_inactive_anon)
REG_set(NR_INACTIVE_FILE, nr_inactive_file)
REG_set(NR_ISOLATED_ANON, nr_isolated_anon)
REG_set(NR_ISOLATED_FILE, nr_isolated_file)
REG_set(NR_KERNEL_STACK, nr_kernel_stack)
REG_set(NR_MAPPED, nr_mapped)
REG_set(NR_MLOCK, nr_mlock)
REG_set(NR_PAGES_SCANNED, nr_pages_scanned)
REG_set(NR_PAGE_TABLE_PAGES, nr_page_table_pages)
REG_set(NR_SHMEM, nr_shmem)
REG_set(NR_SLAB_RECLAIMABLE, nr_slab_reclaimable)
REG_set(NR_SLAB_UNRECLAIMABLE, nr_slab_unreclaimable)
REG_set(NR_UNEVICTABLE, nr_unevictable)
REG_set(NR_UNSTABLE, nr_unstable)
REG_set(NR_VMSCAN_IMMEDIATE_RECLAIM, nr_vmscan_immediate_reclaim)
REG_set(NR_VMSCAN_WRITE, nr_vmscan_write)
REG_set(NR_WRITEBACK, nr_writeback)
REG_set(NR_WRITEBACK_TEMP, nr_writeback_temp)
REG_set(NR_WRITTEN, nr_written)
REG_set(NUMA_FOREIGN, numa_foreign)
REG_set(NUMA_HINT_FAULTS, numa_hint_faults)
REG_set(NUMA_HINT_FAULTS_LOCAL, numa_hint_faults_local)
REG_set(NUMA_HIT, numa_hit)
REG_set(NUMA_HUGE_PTE_UPDATES, numa_huge_pte_updates)
REG_set(NUMA_INTERLEAVE, numa_interleave)
REG_set(NUMA_LOCAL, numa_local)
REG_set(NUMA_MISS, numa_miss)
REG_set(NUMA_OTHER, numa_other)
REG_set(NUMA_PAGES_MIGRATED, numa_pages_migrated)
REG_set(NUMA_PTE_UPDATES, numa_pte_updates)
REG_set(PAGEOUTRUN, pageoutrun)
REG_set(PGACTIVATE, pgactivate)
REG_set(PGALLOC_DMA, pgalloc_dma)
REG_set(PGALLOC_DMA32, pgalloc_dma32)
REG_set(PGALLOC_MOVABLE, pgalloc_movable)
REG_set(PGALLOC_NORMAL, pgalloc_normal)
REG_set(PGDEACTIVATE, pgdeactivate)
REG_set(PGFAULT, pgfault)
REG_set(PGFREE, pgfree)
REG_set(PGINODESTEAL, pginodesteal)
REG_set(PGMAJFAULT, pgmajfault)
REG_set(PGMIGRATE_FAIL, pgmigrate_fail)
REG_set(PGMIGRATE_SUCCESS, pgmigrate_success)
REG_set(PGPGIN, pgpgin)
REG_set(PGPGOUT, pgpgout)
REG_set(PGREFILL_DMA, pgrefill_dma)
REG_set(PGREFILL_DMA32, pgrefill_dma32)
REG_set(PGREFILL_MOVABLE, pgrefill_movable)
REG_set(PGREFILL_NORMAL, pgrefill_normal)
REG_set(PGROTATED, pgrotated)
REG_set(PGSCAN_DIRECT_DMA, pgscan_direct_dma)
REG_set(PGSCAN_DIRECT_DMA32, pgscan_direct_dma32)
REG_set(PGSCAN_DIRECT_MOVABLE, pgscan_direct_movable)
REG_set(PGSCAN_DIRECT_NORMAL, pgscan_direct_normal)
REG_set(PGSCAN_DIRECT_THROTTLE, pgscan_direct_throttle)
REG_set(PGSCAN_KSWAPD_DMA, pgscan_kswapd_dma)
REG_set(PGSCAN_KSWAPD_DMA32, pgscan_kswapd_dma32)
REG_set(PGSCAN_KSWAPD_MOVEABLE, pgscan_kswapd_movable)
REG_set(PGSCAN_KSWAPD_NORMAL, pgscan_kswapd_normal)
REG_set(PGSTEAL_DIRECT_DMA, pgsteal_direct_dma)
REG_set(PGSTEAL_DIRECT_DMA32, pgsteal_direct_dma32)
REG_set(PGSTEAL_DIRECT_MOVABLE, pgsteal_direct_movable)
REG_set(PGSTEAL_DIRECT_NORMAL, pgsteal_direct_normal)
REG_set(PGSTEAL_KSWAPD_DMA, pgsteal_kswapd_dma)
REG_set(PGSTEAL_KSWAPD_DMA32, pgsteal_kswapd_dma32)
REG_set(PGSTEAL_KSWAPD_MOVABLE, pgsteal_kswapd_movable)
REG_set(PGSTEAL_KSWAPD_NORMAL, pgsteal_kswapd_normal)
REG_set(PSWPIN, pswpin)
REG_set(PSWPOUT, pswpout)
REG_set(SLABS_SCANNED, slabs_scanned)
REG_set(THP_COLLAPSE_ALLOC, thp_collapse_alloc)
REG_set(THP_COLLAPSE_ALLOC_FAILED, thp_collapse_alloc_failed)
REG_set(THP_FAULT_ALLOC, thp_fault_alloc)
REG_set(THP_FAULT_FALLBACK, thp_fault_fallback)
REG_set(THP_SPLIT, thp_split)
REG_set(THP_ZERO_PAGE_ALLOC, thp_zero_page_alloc)
REG_set(THP_ZERO_PAGE_ALLOC_FAILED, thp_zero_page_alloc_failed)
REG_set(UNEVICTABLE_PGS_CLEARED, unevictable_pgs_cleared)
REG_set(UNEVICTABLE_PGS_CULLED, unevictable_pgs_culled)
REG_set(UNEVICTABLE_PGS_MLOCKED, unevictable_pgs_mlocked)
REG_set(UNEVICTABLE_PGS_MUNLOCKED, unevictable_pgs_munlocked)
REG_set(UNEVICTABLE_PGS_RESCUED, unevictable_pgs_rescued)
REG_set(UNEVICTABLE_PGS_SCANNED, unevictable_pgs_scanned)
REG_set(UNEVICTABLE_PGS_STRANDED, unevictable_pgs_stranded)
REG_set(WORKINGSET_ACTIVATE, workingset_activate)
REG_set(WORKINGSET_NODERECLAIM, workingset_nodereclaim)
REG_set(WORKINGSET_REFAULT, workingset_refault)
REG_set(ZONE_RECLAIM_FAILED, zone_reclaim_failed)
HST_set(DELTA_ALLOCSTALL, allocstall)
HST_set(DELTA_BALLOON_DEFLATE, balloon_deflate)
HST_set(DELTA_BALLOON_INFLATE, balloon_inflate)
HST_set(DELTA_BALLOON_MIGRATE, balloon_migrate)
HST_set(DELTA_COMPACT_FAIL, compact_fail)
HST_set(DELTA_COMPACT_FREE_SCANNED, compact_free_scanned)
HST_set(DELTA_COMPACT_ISOLATED, compact_isolated)
HST_set(DELTA_COMPACT_MIGRATE_SCANNED, compact_migrate_scanned)
HST_set(DELTA_COMPACT_STALL, compact_stall)
HST_set(DELTA_COMPACT_SUCCESS, compact_success)
HST_set(DELTA_DROP_PAGECACHE, drop_pagecache)
HST_set(DELTA_DROP_SLAB, drop_slab)
HST_set(DELTA_HTLB_BUDDY_ALLOC_FAIL, htlb_buddy_alloc_fail)
HST_set(DELTA_HTLB_BUDDY_ALLOC_SUCCESS, htlb_buddy_alloc_success)
HST_set(DELTA_KSWAPD_HIGH_WMARK_HIT_QUICKLY, kswapd_high_wmark_hit_quickly)
HST_set(DELTA_KSWAPD_INODESTEAL, kswapd_inodesteal)
HST_set(DELTA_KSWAPD_LOW_WMARK_HIT_QUICKLY, kswapd_low_wmark_hit_quickly)
HST_set(DELTA_NR_ACTIVE_ANON, nr_active_anon)
HST_set(DELTA_NR_ACTIVE_FILE, nr_active_file)
HST_set(DELTA_NR_ALLOC_BATCH, nr_alloc_batch)
HST_set(DELTA_NR_ANON_PAGES, nr_anon_pages)
HST_set(DELTA_NR_ANON_TRANSPARENT_HUGEPAGES, nr_anon_transparent_hugepages)
HST_set(DELTA_NR_BOUNCE, nr_bounce)
HST_set(DELTA_NR_DIRTIED, nr_dirtied)
HST_set(DELTA_NR_DIRTY, nr_dirty)
HST_set(DELTA_NR_DIRTY_BACKGROUND_THRESHOLD, nr_dirty_background_threshold)
HST_set(DELTA_NR_DIRTY_THRESHOLD, nr_dirty_threshold)
HST_set(DELTA_NR_FILE_PAGES, nr_file_pages)
HST_set(DELTA_NR_FREE_CMA, nr_free_cma)
HST_set(DELTA_NR_FREE_PAGES, nr_free_pages)
HST_set(DELTA_NR_INACTIVE_ANON, nr_inactive_anon)
HST_set(DELTA_NR_INACTIVE_FILE, nr_inactive_file)
HST_set(DELTA_NR_ISOLATED_ANON, nr_isolated_anon)
HST_set(DELTA_NR_ISOLATED_FILE, nr_isolated_file)
HST_set(DELTA_NR_KERNEL_STACK, nr_kernel_stack)
HST_set(DELTA_NR_MAPPED, nr_mapped)
HST_set(DELTA_NR_MLOCK, nr_mlock)
HST_set(DELTA_NR_PAGES_SCANNED, nr_pages_scanned)
HST_set(DELTA_NR_PAGE_TABLE_PAGES, nr_page_table_pages)
HST_set(DELTA_NR_SHMEM, nr_shmem)
HST_set(DELTA_NR_SLAB_RECLAIMABLE, nr_slab_reclaimable)
HST_set(DELTA_NR_SLAB_UNRECLAIMABLE, nr_slab_unreclaimable)
HST_set(DELTA_NR_UNEVICTABLE, nr_unevictable)
HST_set(DELTA_NR_UNSTABLE, nr_unstable)
HST_set(DELTA_NR_VMSCAN_IMMEDIATE_RECLAIM, nr_vmscan_immediate_reclaim)
HST_set(DELTA_NR_VMSCAN_WRITE, nr_vmscan_write)
HST_set(DELTA_NR_WRITEBACK, nr_writeback)
HST_set(DELTA_NR_WRITEBACK_TEMP, nr_writeback_temp)
HST_set(DELTA_NR_WRITTEN, nr_written)
HST_set(DELTA_NUMA_FOREIGN, numa_foreign)
HST_set(DELTA_NUMA_HINT_FAULTS, numa_hint_faults)
HST_set(DELTA_NUMA_HINT_FAULTS_LOCAL, numa_hint_faults_local)
HST_set(DELTA_NUMA_HIT, numa_hit)
HST_set(DELTA_NUMA_HUGE_PTE_UPDATES, numa_huge_pte_updates)
HST_set(DELTA_NUMA_INTERLEAVE, numa_interleave)
HST_set(DELTA_NUMA_LOCAL, numa_local)
HST_set(DELTA_NUMA_MISS, numa_miss)
HST_set(DELTA_NUMA_OTHER, numa_other)
HST_set(DELTA_NUMA_PAGES_MIGRATED, numa_pages_migrated)
HST_set(DELTA_NUMA_PTE_UPDATES, numa_pte_updates)
HST_set(DELTA_PAGEOUTRUN, pageoutrun)
HST_set(DELTA_PGACTIVATE, pgactivate)
HST_set(DELTA_PGALLOC_DMA, pgalloc_dma)
HST_set(DELTA_PGALLOC_DMA32, pgalloc_dma32)
HST_set(DELTA_PGALLOC_MOVABLE, pgalloc_movable)
HST_set(DELTA_PGALLOC_NORMAL, pgalloc_normal)
HST_set(DELTA_PGDEACTIVATE, pgdeactivate)
HST_set(DELTA_PGFAULT, pgfault)
HST_set(DELTA_PGFREE, pgfree)
HST_set(DELTA_PGINODESTEAL, pginodesteal)
HST_set(DELTA_PGMAJFAULT, pgmajfault)
HST_set(DELTA_PGMIGRATE_FAIL, pgmigrate_fail)
HST_set(DELTA_PGMIGRATE_SUCCESS, pgmigrate_success)
HST_set(DELTA_PGPGIN, pgpgin)
HST_set(DELTA_PGPGOUT, pgpgout)
HST_set(DELTA_PGREFILL_DMA, pgrefill_dma)
HST_set(DELTA_PGREFILL_DMA32, pgrefill_dma32)
HST_set(DELTA_PGREFILL_MOVABLE, pgrefill_movable)
HST_set(DELTA_PGREFILL_NORMAL, pgrefill_normal)
HST_set(DELTA_PGROTATED, pgrotated)
HST_set(DELTA_PGSCAN_DIRECT_DMA, pgscan_direct_dma)
HST_set(DELTA_PGSCAN_DIRECT_DMA32, pgscan_direct_dma32)
HST_set(DELTA_PGSCAN_DIRECT_MOVABLE, pgscan_direct_movable)
HST_set(DELTA_PGSCAN_DIRECT_NORMAL, pgscan_direct_normal)
HST_set(DELTA_PGSCAN_DIRECT_THROTTLE, pgscan_direct_throttle)
HST_set(DELTA_PGSCAN_KSWAPD_DMA, pgscan_kswapd_dma)
HST_set(DELTA_PGSCAN_KSWAPD_DMA32, pgscan_kswapd_dma32)
HST_set(DELTA_PGSCAN_KSWAPD_MOVEABLE, pgscan_kswapd_movable)
HST_set(DELTA_PGSCAN_KSWAPD_NORMAL, pgscan_kswapd_normal)
HST_set(DELTA_PGSTEAL_DIRECT_DMA, pgsteal_direct_dma)
HST_set(DELTA_PGSTEAL_DIRECT_DMA32, pgsteal_direct_dma32)
HST_set(DELTA_PGSTEAL_DIRECT_MOVABLE, pgsteal_direct_movable)
HST_set(DELTA_PGSTEAL_DIRECT_NORMAL, pgsteal_direct_normal)
HST_set(DELTA_PGSTEAL_KSWAPD_DMA, pgsteal_kswapd_dma)
HST_set(DELTA_PGSTEAL_KSWAPD_DMA32, pgsteal_kswapd_dma32)
HST_set(DELTA_PGSTEAL_KSWAPD_MOVABLE, pgsteal_kswapd_movable)
HST_set(DELTA_PGSTEAL_KSWAPD_NORMAL, pgsteal_kswapd_normal)
HST_set(DELTA_PSWPIN, pswpin)
HST_set(DELTA_PSWPOUT, pswpout)
HST_set(DELTA_SLABS_SCANNED, slabs_scanned)
HST_set(DELTA_THP_COLLAPSE_ALLOC, thp_collapse_alloc)
HST_set(DELTA_THP_COLLAPSE_ALLOC_FAILED, thp_collapse_alloc_failed)
HST_set(DELTA_THP_FAULT_ALLOC, thp_fault_alloc)
HST_set(DELTA_THP_FAULT_FALLBACK, thp_fault_fallback)
HST_set(DELTA_THP_SPLIT, thp_split)
HST_set(DELTA_THP_ZERO_PAGE_ALLOC, thp_zero_page_alloc)
HST_set(DELTA_THP_ZERO_PAGE_ALLOC_FAILED, thp_zero_page_alloc_failed)
HST_set(DELTA_UNEVICTABLE_PGS_CLEARED, unevictable_pgs_cleared)
HST_set(DELTA_UNEVICTABLE_PGS_CULLED, unevictable_pgs_culled)
HST_set(DELTA_UNEVICTABLE_PGS_MLOCKED, unevictable_pgs_mlocked)
HST_set(DELTA_UNEVICTABLE_PGS_MUNLOCKED, unevictable_pgs_munlocked)
HST_set(DELTA_UNEVICTABLE_PGS_RESCUED, unevictable_pgs_rescued)
HST_set(DELTA_UNEVICTABLE_PGS_SCANNED, unevictable_pgs_scanned)
HST_set(DELTA_UNEVICTABLE_PGS_STRANDED, unevictable_pgs_stranded)
HST_set(DELTA_WORKINGSET_ACTIVATE, workingset_activate)
HST_set(DELTA_WORKINGSET_NODERECLAIM, workingset_nodereclaim)
HST_set(DELTA_WORKINGSET_REFAULT, workingset_refault)
HST_set(DELTA_ZONE_RECLAIM_FAILED, zone_reclaim_failed)
#undef setDECL
#undef REG_set
#undef HST_set
// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
typedef void (*SET_t)(struct vmstat_result *, struct vmstat_hist *);
#define RS(e) (SET_t)setNAME(e)
#define TS(t) STRINGIFY(t)
#define TS_noop ""
/*
* Need it be said?
* This table must be kept in the exact same order as
* those 'enum vmstat_item' guys ! */
static struct {
SET_t setsfunc; // the actual result setting routine
char *type2str; // the result type as a string value
} Item_table[] = {
/* setsfunc type2str
---------------------------------------- ---------- */
{ RS(noop), TS_noop },
{ RS(extra), TS_noop },
{ RS(ALLOCSTALL), TS(ul_int) },
{ RS(BALLOON_DEFLATE), TS(ul_int) },
{ RS(BALLOON_INFLATE), TS(ul_int) },
{ RS(BALLOON_MIGRATE), TS(ul_int) },
{ RS(COMPACT_FAIL), TS(ul_int) },
{ RS(COMPACT_FREE_SCANNED), TS(ul_int) },
{ RS(COMPACT_ISOLATED), TS(ul_int) },
{ RS(COMPACT_MIGRATE_SCANNED), TS(ul_int) },
{ RS(COMPACT_STALL), TS(ul_int) },
{ RS(COMPACT_SUCCESS), TS(ul_int) },
{ RS(DROP_PAGECACHE), TS(ul_int) },
{ RS(DROP_SLAB), TS(ul_int) },
{ RS(HTLB_BUDDY_ALLOC_FAIL), TS(ul_int) },
{ RS(HTLB_BUDDY_ALLOC_SUCCESS), TS(ul_int) },
{ RS(KSWAPD_HIGH_WMARK_HIT_QUICKLY), TS(ul_int) },
{ RS(KSWAPD_INODESTEAL), TS(ul_int) },
{ RS(KSWAPD_LOW_WMARK_HIT_QUICKLY), TS(ul_int) },
{ RS(NR_ACTIVE_ANON), TS(ul_int) },
{ RS(NR_ACTIVE_FILE), TS(ul_int) },
{ RS(NR_ALLOC_BATCH), TS(ul_int) },
{ RS(NR_ANON_PAGES), TS(ul_int) },
{ RS(NR_ANON_TRANSPARENT_HUGEPAGES), TS(ul_int) },
{ RS(NR_BOUNCE), TS(ul_int) },
{ RS(NR_DIRTIED), TS(ul_int) },
{ RS(NR_DIRTY), TS(ul_int) },
{ RS(NR_DIRTY_BACKGROUND_THRESHOLD), TS(ul_int) },
{ RS(NR_DIRTY_THRESHOLD), TS(ul_int) },
{ RS(NR_FILE_PAGES), TS(ul_int) },
{ RS(NR_FREE_CMA), TS(ul_int) },
{ RS(NR_FREE_PAGES), TS(ul_int) },
{ RS(NR_INACTIVE_ANON), TS(ul_int) },
{ RS(NR_INACTIVE_FILE), TS(ul_int) },
{ RS(NR_ISOLATED_ANON), TS(ul_int) },
{ RS(NR_ISOLATED_FILE), TS(ul_int) },
{ RS(NR_KERNEL_STACK), TS(ul_int) },
{ RS(NR_MAPPED), TS(ul_int) },
{ RS(NR_MLOCK), TS(ul_int) },
{ RS(NR_PAGES_SCANNED), TS(ul_int) },
{ RS(NR_PAGE_TABLE_PAGES), TS(ul_int) },
{ RS(NR_SHMEM), TS(ul_int) },
{ RS(NR_SLAB_RECLAIMABLE), TS(ul_int) },
{ RS(NR_SLAB_UNRECLAIMABLE), TS(ul_int) },
{ RS(NR_UNEVICTABLE), TS(ul_int) },
{ RS(NR_UNSTABLE), TS(ul_int) },
{ RS(NR_VMSCAN_IMMEDIATE_RECLAIM), TS(ul_int) },
{ RS(NR_VMSCAN_WRITE), TS(ul_int) },
{ RS(NR_WRITEBACK), TS(ul_int) },
{ RS(NR_WRITEBACK_TEMP), TS(ul_int) },
{ RS(NR_WRITTEN), TS(ul_int) },
{ RS(NUMA_FOREIGN), TS(ul_int) },
{ RS(NUMA_HINT_FAULTS), TS(ul_int) },
{ RS(NUMA_HINT_FAULTS_LOCAL), TS(ul_int) },
{ RS(NUMA_HIT), TS(ul_int) },
{ RS(NUMA_HUGE_PTE_UPDATES), TS(ul_int) },
{ RS(NUMA_INTERLEAVE), TS(ul_int) },
{ RS(NUMA_LOCAL), TS(ul_int) },
{ RS(NUMA_MISS), TS(ul_int) },
{ RS(NUMA_OTHER), TS(ul_int) },
{ RS(NUMA_PAGES_MIGRATED), TS(ul_int) },
{ RS(NUMA_PTE_UPDATES), TS(ul_int) },
{ RS(PAGEOUTRUN), TS(ul_int) },
{ RS(PGACTIVATE), TS(ul_int) },
{ RS(PGALLOC_DMA), TS(ul_int) },
{ RS(PGALLOC_DMA32), TS(ul_int) },
{ RS(PGALLOC_MOVABLE), TS(ul_int) },
{ RS(PGALLOC_NORMAL), TS(ul_int) },
{ RS(PGDEACTIVATE), TS(ul_int) },
{ RS(PGFAULT), TS(ul_int) },
{ RS(PGFREE), TS(ul_int) },
{ RS(PGINODESTEAL), TS(ul_int) },
{ RS(PGMAJFAULT), TS(ul_int) },
{ RS(PGMIGRATE_FAIL), TS(ul_int) },
{ RS(PGMIGRATE_SUCCESS), TS(ul_int) },
{ RS(PGPGIN), TS(ul_int) },
{ RS(PGPGOUT), TS(ul_int) },
{ RS(PGREFILL_DMA), TS(ul_int) },
{ RS(PGREFILL_DMA32), TS(ul_int) },
{ RS(PGREFILL_MOVABLE), TS(ul_int) },
{ RS(PGREFILL_NORMAL), TS(ul_int) },
{ RS(PGROTATED), TS(ul_int) },
{ RS(PGSCAN_DIRECT_DMA), TS(ul_int) },
{ RS(PGSCAN_DIRECT_DMA32), TS(ul_int) },
{ RS(PGSCAN_DIRECT_MOVABLE), TS(ul_int) },
{ RS(PGSCAN_DIRECT_NORMAL), TS(ul_int) },
{ RS(PGSCAN_DIRECT_THROTTLE), TS(ul_int) },
{ RS(PGSCAN_KSWAPD_DMA), TS(ul_int) },
{ RS(PGSCAN_KSWAPD_DMA32), TS(ul_int) },
{ RS(PGSCAN_KSWAPD_MOVEABLE), TS(ul_int) },
{ RS(PGSCAN_KSWAPD_NORMAL), TS(ul_int) },
{ RS(PGSTEAL_DIRECT_DMA), TS(ul_int) },
{ RS(PGSTEAL_DIRECT_DMA32), TS(ul_int) },
{ RS(PGSTEAL_DIRECT_MOVABLE), TS(ul_int) },
{ RS(PGSTEAL_DIRECT_NORMAL), TS(ul_int) },
{ RS(PGSTEAL_KSWAPD_DMA), TS(ul_int) },
{ RS(PGSTEAL_KSWAPD_DMA32), TS(ul_int) },
{ RS(PGSTEAL_KSWAPD_MOVABLE), TS(ul_int) },
{ RS(PGSTEAL_KSWAPD_NORMAL), TS(ul_int) },
{ RS(PSWPIN), TS(ul_int) },
{ RS(PSWPOUT), TS(ul_int) },
{ RS(SLABS_SCANNED), TS(ul_int) },
{ RS(THP_COLLAPSE_ALLOC), TS(ul_int) },
{ RS(THP_COLLAPSE_ALLOC_FAILED), TS(ul_int) },
{ RS(THP_FAULT_ALLOC), TS(ul_int) },
{ RS(THP_FAULT_FALLBACK), TS(ul_int) },
{ RS(THP_SPLIT), TS(ul_int) },
{ RS(THP_ZERO_PAGE_ALLOC), TS(ul_int) },
{ RS(THP_ZERO_PAGE_ALLOC_FAILED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_CLEARED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_CULLED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_MLOCKED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_MUNLOCKED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_RESCUED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_SCANNED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_STRANDED), TS(ul_int) },
{ RS(WORKINGSET_ACTIVATE), TS(ul_int) },
{ RS(WORKINGSET_NODERECLAIM), TS(ul_int) },
{ RS(WORKINGSET_REFAULT), TS(ul_int) },
{ RS(ZONE_RECLAIM_FAILED), TS(ul_int) },
{ RS(DELTA_ALLOCSTALL), TS(sl_int) },
{ RS(DELTA_BALLOON_DEFLATE), TS(sl_int) },
{ RS(DELTA_BALLOON_INFLATE), TS(sl_int) },
{ RS(DELTA_BALLOON_MIGRATE), TS(sl_int) },
{ RS(DELTA_COMPACT_FAIL), TS(sl_int) },
{ RS(DELTA_COMPACT_FREE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_ISOLATED), TS(sl_int) },
{ RS(DELTA_COMPACT_MIGRATE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_STALL), TS(sl_int) },
{ RS(DELTA_COMPACT_SUCCESS), TS(sl_int) },
{ RS(DELTA_DROP_PAGECACHE), TS(sl_int) },
{ RS(DELTA_DROP_SLAB), TS(sl_int) },
{ RS(DELTA_HTLB_BUDDY_ALLOC_FAIL), TS(sl_int) },
{ RS(DELTA_HTLB_BUDDY_ALLOC_SUCCESS), TS(sl_int) },
{ RS(DELTA_KSWAPD_HIGH_WMARK_HIT_QUICKLY), TS(sl_int) },
{ RS(DELTA_KSWAPD_INODESTEAL), TS(sl_int) },
{ RS(DELTA_KSWAPD_LOW_WMARK_HIT_QUICKLY), TS(sl_int) },
{ RS(DELTA_NR_ACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_ACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ALLOC_BATCH), TS(sl_int) },
{ RS(DELTA_NR_ANON_PAGES), TS(sl_int) },
{ RS(DELTA_NR_ANON_TRANSPARENT_HUGEPAGES), TS(sl_int) },
{ RS(DELTA_NR_BOUNCE), TS(sl_int) },
{ RS(DELTA_NR_DIRTIED), TS(sl_int) },
{ RS(DELTA_NR_DIRTY), TS(sl_int) },
{ RS(DELTA_NR_DIRTY_BACKGROUND_THRESHOLD), TS(sl_int) },
{ RS(DELTA_NR_DIRTY_THRESHOLD), TS(sl_int) },
{ RS(DELTA_NR_FILE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_FREE_CMA), TS(sl_int) },
{ RS(DELTA_NR_FREE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_INACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_INACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ISOLATED_ANON), TS(sl_int) },
{ RS(DELTA_NR_ISOLATED_FILE), TS(sl_int) },
{ RS(DELTA_NR_KERNEL_STACK), TS(sl_int) },
{ RS(DELTA_NR_MAPPED), TS(sl_int) },
{ RS(DELTA_NR_MLOCK), TS(sl_int) },
{ RS(DELTA_NR_PAGES_SCANNED), TS(sl_int) },
{ RS(DELTA_NR_PAGE_TABLE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_SHMEM), TS(sl_int) },
{ RS(DELTA_NR_SLAB_RECLAIMABLE), TS(sl_int) },
{ RS(DELTA_NR_SLAB_UNRECLAIMABLE), TS(sl_int) },
{ RS(DELTA_NR_UNEVICTABLE), TS(sl_int) },
{ RS(DELTA_NR_UNSTABLE), TS(sl_int) },
{ RS(DELTA_NR_VMSCAN_IMMEDIATE_RECLAIM), TS(sl_int) },
{ RS(DELTA_NR_VMSCAN_WRITE), TS(sl_int) },
{ RS(DELTA_NR_WRITEBACK), TS(sl_int) },
{ RS(DELTA_NR_WRITEBACK_TEMP), TS(sl_int) },
{ RS(DELTA_NR_WRITTEN), TS(sl_int) },
{ RS(DELTA_NUMA_FOREIGN), TS(sl_int) },
{ RS(DELTA_NUMA_HINT_FAULTS), TS(sl_int) },
{ RS(DELTA_NUMA_HINT_FAULTS_LOCAL), TS(sl_int) },
{ RS(DELTA_NUMA_HIT), TS(sl_int) },
{ RS(DELTA_NUMA_HUGE_PTE_UPDATES), TS(sl_int) },
{ RS(DELTA_NUMA_INTERLEAVE), TS(sl_int) },
{ RS(DELTA_NUMA_LOCAL), TS(sl_int) },
{ RS(DELTA_NUMA_MISS), TS(sl_int) },
{ RS(DELTA_NUMA_OTHER), TS(sl_int) },
{ RS(DELTA_NUMA_PAGES_MIGRATED), TS(sl_int) },
{ RS(DELTA_NUMA_PTE_UPDATES), TS(sl_int) },
{ RS(DELTA_PAGEOUTRUN), TS(sl_int) },
{ RS(DELTA_PGACTIVATE), TS(sl_int) },
{ RS(DELTA_PGALLOC_DMA), TS(sl_int) },
{ RS(DELTA_PGALLOC_DMA32), TS(sl_int) },
{ RS(DELTA_PGALLOC_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGALLOC_NORMAL), TS(sl_int) },
{ RS(DELTA_PGDEACTIVATE), TS(sl_int) },
{ RS(DELTA_PGFAULT), TS(sl_int) },
{ RS(DELTA_PGFREE), TS(sl_int) },
{ RS(DELTA_PGINODESTEAL), TS(sl_int) },
{ RS(DELTA_PGMAJFAULT), TS(sl_int) },
{ RS(DELTA_PGMIGRATE_FAIL), TS(sl_int) },
{ RS(DELTA_PGMIGRATE_SUCCESS), TS(sl_int) },
{ RS(DELTA_PGPGIN), TS(sl_int) },
{ RS(DELTA_PGPGOUT), TS(sl_int) },
{ RS(DELTA_PGREFILL_DMA), TS(sl_int) },
{ RS(DELTA_PGREFILL_DMA32), TS(sl_int) },
{ RS(DELTA_PGREFILL_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGREFILL_NORMAL), TS(sl_int) },
{ RS(DELTA_PGROTATED), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_DMA), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_DMA32), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_NORMAL), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_THROTTLE), TS(sl_int) },
{ RS(DELTA_PGSCAN_KSWAPD_DMA), TS(sl_int) },
{ RS(DELTA_PGSCAN_KSWAPD_DMA32), TS(sl_int) },
{ RS(DELTA_PGSCAN_KSWAPD_MOVEABLE), TS(sl_int) },
{ RS(DELTA_PGSCAN_KSWAPD_NORMAL), TS(sl_int) },
{ RS(DELTA_PGSTEAL_DIRECT_DMA), TS(sl_int) },
{ RS(DELTA_PGSTEAL_DIRECT_DMA32), TS(sl_int) },
{ RS(DELTA_PGSTEAL_DIRECT_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGSTEAL_DIRECT_NORMAL), TS(sl_int) },
{ RS(DELTA_PGSTEAL_KSWAPD_DMA), TS(sl_int) },
{ RS(DELTA_PGSTEAL_KSWAPD_DMA32), TS(sl_int) },
{ RS(DELTA_PGSTEAL_KSWAPD_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGSTEAL_KSWAPD_NORMAL), TS(sl_int) },
{ RS(DELTA_PSWPIN), TS(sl_int) },
{ RS(DELTA_PSWPOUT), TS(sl_int) },
{ RS(DELTA_SLABS_SCANNED), TS(sl_int) },
{ RS(DELTA_THP_COLLAPSE_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_COLLAPSE_ALLOC_FAILED), TS(sl_int) },
{ RS(DELTA_THP_FAULT_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_FAULT_FALLBACK), TS(sl_int) },
{ RS(DELTA_THP_SPLIT), TS(sl_int) },
{ RS(DELTA_THP_ZERO_PAGE_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_ZERO_PAGE_ALLOC_FAILED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_CLEARED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_CULLED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_MLOCKED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_MUNLOCKED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_RESCUED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_SCANNED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_STRANDED), TS(sl_int) },
{ RS(DELTA_WORKINGSET_ACTIVATE), TS(sl_int) },
{ RS(DELTA_WORKINGSET_NODERECLAIM), TS(sl_int) },
{ RS(DELTA_WORKINGSET_REFAULT), TS(sl_int) },
{ RS(DELTA_ZONE_RECLAIM_FAILED), TS(sl_int) },
// dummy entry corresponding to VMSTAT_logical_end ...
{ NULL, NULL }
};
/* please note,
* this enum MUST be 1 greater than the highest value of any enum */
enum vmstat_item VMSTAT_logical_end = VMSTAT_DELTA_ZONE_RECLAIM_FAILED + 1;
#undef setNAME
#undef RS
// ___ Private Functions ||||||||||||||||||||||||||||||||||||||||||||||||||||||
static inline void vmstat_assign_results (
struct vmstat_stack *stack,
struct vmstat_hist *hist)
{
struct vmstat_result *this = stack->head;
for (;;) {
enum vmstat_item item = this->item;
if (item >= VMSTAT_logical_end)
break;
Item_table[item].setsfunc(this, hist);
++this;
}
return;
} // end: vmstat_assign_results
static inline void vmstat_cleanup_stack (
struct vmstat_result *this)
{
for (;;) {
if (this->item >= VMSTAT_logical_end)
break;
if (this->item > VMSTAT_noop)
this->result.ul_int = 0;
++this;
}
} // end: vmstat_cleanup_stack
static inline void vmstat_cleanup_stacks_all (
struct vmstat_info *info)
{
struct stacks_extent *ext = info->extents;
int i;
while (ext) {
for (i = 0; ext->stacks[i]; i++)
vmstat_cleanup_stack(ext->stacks[i]->head);
ext = ext->next;
};
info->dirty_stacks = 0;
} // end: vmstat_cleanup_stacks_all
static void vmstat_extents_free_all (
struct vmstat_info *info)
{
while (info->extents) {
struct stacks_extent *p = info->extents;
info->extents = info->extents->next;
free(p);
};
} // end: vmstat_extents_free_all
static inline struct vmstat_result *vmstat_itemize_stack (
struct vmstat_result *p,
int depth,
enum vmstat_item *items)
{
struct vmstat_result *p_sav = p;
int i;
for (i = 0; i < depth; i++) {
p->item = items[i];
p->result.ul_int = 0;
++p;
}
return p_sav;
} // end: vmstat_itemize_stack
static inline int vmstat_items_check_failed (
int numitems,
enum vmstat_item *items)
{
int i;
/* if an enum is passed instead of an address of one or more enums, ol' gcc
* will silently convert it to an address (possibly NULL). only clang will
* offer any sort of warning like the following:
*
* warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'enum vmstat_item *'
* my_stack = procps_vmstat_select(info, VMSTAT_noop, num);
* ^~~~~~~~~~~~~~~~
*/
if (numitems < 1
|| (void *)items < (void *)(unsigned long)(2 * VMSTAT_logical_end))
return -1;
for (i = 0; i < numitems; i++) {
// a vmstat_item is currently unsigned, but we'll protect our future
if (items[i] < 0)
return -1;
if (items[i] >= VMSTAT_logical_end)
return -1;
}
return 0;
} // end: vmstat_items_check_failed
static int vmstat_make_hash_failed (
struct vmstat_info *info)
{
#define htVAL(f) e.key = STRINGIFY(f); e.data = &info->hist.new. f; \
if (!hsearch_r(e, ENTER, &ep, &info->hashtab)) return -errno;
ENTRY e, *ep;
size_t n;
n = sizeof(struct vmstat_data) / sizeof(unsigned long);
// we'll follow the hsearch recommendation of an extra 25%
hcreate_r(n + (n / 4), &info->hashtab);
htVAL(allocstall)
htVAL(balloon_deflate)
htVAL(balloon_inflate)
htVAL(balloon_migrate)
htVAL(compact_fail)
htVAL(compact_free_scanned)
htVAL(compact_isolated)
htVAL(compact_migrate_scanned)
htVAL(compact_stall)
htVAL(compact_success)
htVAL(drop_pagecache)
htVAL(drop_slab)
htVAL(htlb_buddy_alloc_fail)
htVAL(htlb_buddy_alloc_success)
htVAL(kswapd_high_wmark_hit_quickly)
htVAL(kswapd_inodesteal)
htVAL(kswapd_low_wmark_hit_quickly)
htVAL(nr_active_anon)
htVAL(nr_active_file)
htVAL(nr_alloc_batch)
htVAL(nr_anon_pages)
htVAL(nr_anon_transparent_hugepages)
htVAL(nr_bounce)
htVAL(nr_dirtied)
htVAL(nr_dirty)
htVAL(nr_dirty_background_threshold)
htVAL(nr_dirty_threshold)
htVAL(nr_file_pages)
htVAL(nr_free_cma)
htVAL(nr_free_pages)
htVAL(nr_inactive_anon)
htVAL(nr_inactive_file)
htVAL(nr_isolated_anon)
htVAL(nr_isolated_file)
htVAL(nr_kernel_stack)
htVAL(nr_mapped)
htVAL(nr_mlock)
htVAL(nr_pages_scanned)
htVAL(nr_page_table_pages)
htVAL(nr_shmem)
htVAL(nr_slab_reclaimable)
htVAL(nr_slab_unreclaimable)
htVAL(nr_unevictable)
htVAL(nr_unstable)
htVAL(nr_vmscan_immediate_reclaim)
htVAL(nr_vmscan_write)
htVAL(nr_writeback)
htVAL(nr_writeback_temp)
htVAL(nr_written)
htVAL(numa_foreign)
htVAL(numa_hint_faults)
htVAL(numa_hint_faults_local)
htVAL(numa_hit)
htVAL(numa_huge_pte_updates)
htVAL(numa_interleave)
htVAL(numa_local)
htVAL(numa_miss)
htVAL(numa_other)
htVAL(numa_pages_migrated)
htVAL(numa_pte_updates)
htVAL(pageoutrun)
htVAL(pgactivate)
htVAL(pgalloc_dma)
htVAL(pgalloc_dma32)
htVAL(pgalloc_movable)
htVAL(pgalloc_normal)
htVAL(pgdeactivate)
htVAL(pgfault)
htVAL(pgfree)
htVAL(pginodesteal)
htVAL(pgmajfault)
htVAL(pgmigrate_fail)
htVAL(pgmigrate_success)
htVAL(pgpgin)
htVAL(pgpgout)
htVAL(pgrefill_dma)
htVAL(pgrefill_dma32)
htVAL(pgrefill_movable)
htVAL(pgrefill_normal)
htVAL(pgrotated)
htVAL(pgscan_direct_dma)
htVAL(pgscan_direct_dma32)
htVAL(pgscan_direct_movable)
htVAL(pgscan_direct_normal)
htVAL(pgscan_direct_throttle)
htVAL(pgscan_kswapd_dma)
htVAL(pgscan_kswapd_dma32)
htVAL(pgscan_kswapd_movable)
htVAL(pgscan_kswapd_normal)
htVAL(pgsteal_direct_dma)
htVAL(pgsteal_direct_dma32)
htVAL(pgsteal_direct_movable)
htVAL(pgsteal_direct_normal)
htVAL(pgsteal_kswapd_dma)
htVAL(pgsteal_kswapd_dma32)
htVAL(pgsteal_kswapd_movable)
htVAL(pgsteal_kswapd_normal)
htVAL(pswpin)
htVAL(pswpout)
htVAL(slabs_scanned)
htVAL(thp_collapse_alloc)
htVAL(thp_collapse_alloc_failed)
htVAL(thp_fault_alloc)
htVAL(thp_fault_fallback)
htVAL(thp_split)
htVAL(thp_zero_page_alloc)
htVAL(thp_zero_page_alloc_failed)
htVAL(unevictable_pgs_cleared)
htVAL(unevictable_pgs_culled)
htVAL(unevictable_pgs_mlocked)
htVAL(unevictable_pgs_munlocked)
htVAL(unevictable_pgs_rescued)
htVAL(unevictable_pgs_scanned)
htVAL(unevictable_pgs_stranded)
htVAL(workingset_activate)
htVAL(workingset_nodereclaim)
htVAL(workingset_refault)
htVAL(zone_reclaim_failed)
return 0;
#undef htVAL
} // end: vmstat_make_hash_failed
/*
* vmstat_read_failed():
*
* Read the data out of /proc/vmstat putting the information
* into the supplied info structure
*/
static int vmstat_read_failed (
struct vmstat_info *info)
{
char buf[8192];
char *head, *tail;
int size;
unsigned long *valptr;
if (info == NULL)
return -1;
// remember history from last time around
memcpy(&info->hist.old, &info->hist.new, sizeof(struct vmstat_data));
// clear out the soon to be 'current' values
memset(&info->hist.new, 0, sizeof(struct vmstat_data));
if (-1 == info->vmstat_fd
&& (info->vmstat_fd = open(VMSTAT_FILE, O_RDONLY)) == -1)
return -errno;
if (lseek(info->vmstat_fd, 0L, SEEK_SET) == -1)
return -errno;
for (;;) {
if ((size = read(info->vmstat_fd, buf, sizeof(buf)-1)) < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
return -errno;
}
break;
}
if (size == 0)
return -1;
buf[size] = '\0';
head = buf;
for (;;) {
static ENTRY e; // just to keep coverity off our backs (e.data)
ENTRY *ep;
tail = strchr(head, ' ');
if (!tail)
break;
*tail = '\0';
valptr = NULL;
e.key = head;
if (hsearch_r(e, FIND, &ep, &info->hashtab))
valptr = ep->data;
head = tail + 1;
if (valptr)
*valptr = strtoul(head, &tail, 10);
tail = strchr(head, '\n');
if (!tail)
break;
head = tail + 1;
}
return 0;
} // end: vmstat_read_failed
/*
* vmstat_stacks_alloc():
*
* Allocate and initialize one or more stacks each of which is anchored in an
* associated context structure.
*
* All such stacks will have their result structures properly primed with
* 'items', while the result itself will be zeroed.
*
* Returns a stacks_extent struct anchoring the 'heads' of each new stack.
*/
static struct stacks_extent *vmstat_stacks_alloc (
struct vmstat_info *info,
int maxstacks)
{
struct stacks_extent *p_blob;
struct vmstat_stack **p_vect;
struct vmstat_stack *p_head;
size_t vect_size, head_size, list_size, blob_size;
void *v_head, *v_list;
int i;
if (info == NULL || info->items == NULL)
return NULL;
if (maxstacks < 1)
return NULL;
vect_size = sizeof(void *) * maxstacks; // size of the addr vectors |
vect_size += sizeof(void *); // plus NULL addr delimiter |
head_size = sizeof(struct vmstat_stack); // size of that head struct |
list_size = sizeof(struct vmstat_result)*info->numitems; // any single results stack |
blob_size = sizeof(struct stacks_extent); // the extent anchor itself |
blob_size += vect_size; // plus room for addr vects |
blob_size += head_size * maxstacks; // plus room for head thing |
blob_size += list_size * maxstacks; // plus room for our stacks |
/* note: all of our memory is allocated in a single blob, facilitating a later free(). |
as a minimum, it is important that the result structures themselves always be |
contiguous for every stack since they are accessed through relative position. | */
if (NULL == (p_blob = calloc(1, blob_size)))
return NULL;
p_blob->next = info->extents; // push this extent onto... |
info->extents = p_blob; // ...some existing extents |
p_vect = (void *)p_blob + sizeof(struct stacks_extent); // prime our vector pointer |
p_blob->stacks = p_vect; // set actual vectors start |
v_head = (void *)p_vect + vect_size; // prime head pointer start |
v_list = v_head + (head_size * maxstacks); // prime our stacks pointer |
for (i = 0; i < maxstacks; i++) {
p_head = (struct vmstat_stack *)v_head;
p_head->head = vmstat_itemize_stack((struct vmstat_result *)v_list, info->numitems, info->items);
p_blob->stacks[i] = p_head;
v_list += list_size;
v_head += head_size;
}
p_blob->ext_numstacks = maxstacks;
return p_blob;
} // end: vmstat_stacks_alloc
// ___ Public Functions |||||||||||||||||||||||||||||||||||||||||||||||||||||||
// --- standard required functions --------------------------------------------
/*
* procps_vmstat_new:
*
* Create a new container to hold the stat information
*
* The initial refcount is 1, and needs to be decremented
* to release the resources of the structure.
*
* Returns: < 0 on failure, 0 on success along with
* a pointer to a new context struct
*/
PROCPS_EXPORT int procps_vmstat_new (
struct vmstat_info **info)
{
struct vmstat_info *p;
int rc;
if (info == NULL || *info != NULL)
return -EINVAL;
if (!(p = calloc(1, sizeof(struct vmstat_info))))
return -ENOMEM;
p->refcount = 1;
p->vmstat_fd = -1;
if ((rc = vmstat_make_hash_failed(p))) {
free(p);
return rc;
}
/* do a priming read here for the following potential benefits: |
1) ensure there will be no problems with subsequent access |
2) make delta results potentially useful, even if 1st time |
3) elimnate need for history distortions 1st time 'switch' | */
if ((rc = vmstat_read_failed(p))) {
procps_vmstat_unref(&p);
return rc;
}
*info = p;
return 0;
} // end: procps_vmstat_new
PROCPS_EXPORT int procps_vmstat_ref (
struct vmstat_info *info)
{
if (info == NULL)
return -EINVAL;
info->refcount++;
return info->refcount;
} // end: procps_vmstat_ref
PROCPS_EXPORT int procps_vmstat_unref (
struct vmstat_info **info)
{
if (info == NULL || *info == NULL)
return -EINVAL;
(*info)->refcount--;
if ((*info)->refcount < 1) {
if ((*info)->extents)
vmstat_extents_free_all((*info));
if ((*info)->items)
free((*info)->items);
hdestroy_r(&(*info)->hashtab);
free(*info);
*info = NULL;
return 0;
}
return (*info)->refcount;
} // end: procps_vmstat_unref
// --- variable interface functions -------------------------------------------
PROCPS_EXPORT struct vmstat_result *procps_vmstat_get (
struct vmstat_info *info,
enum vmstat_item item)
{
static time_t sav_secs;
time_t cur_secs;
if (info == NULL)
return NULL;
if (item < 0 || item >= VMSTAT_logical_end)
return NULL;
/* we will NOT read the vmstat file with every call - rather, we'll offer
a granularity of 1 second between reads ... */
cur_secs = time(NULL);
if (1 <= cur_secs - sav_secs) {
if (vmstat_read_failed(info))
return NULL;
sav_secs = cur_secs;
}
info->get_this.item = item;
// with 'get', we must NOT honor the usual 'noop' guarantee
// if (item > VMSTAT_noop)
info->get_this.result.ul_int = 0;
Item_table[item].setsfunc(&info->get_this, &info->hist);
return &info->get_this;
} // end: procps_vmstat_get
/* procps_vmstat_select():
*
* Harvest all the requested /proc/vmstat information then return
* it in a results stack.
*
* Returns: pointer to a vmstat_stack struct on success, NULL on error.
*/
PROCPS_EXPORT struct vmstat_stack *procps_vmstat_select (
struct vmstat_info *info,
enum vmstat_item *items,
int numitems)
{
if (info == NULL || items == NULL)
return NULL;
if (vmstat_items_check_failed(numitems, items))
return NULL;
/* is this the first time or have things changed since we were last called?
if so, gotta' redo all of our stacks stuff ... */
if (info->numitems != numitems + 1
|| memcmp(info->items, items, sizeof(enum vmstat_item) * numitems)) {
// allow for our VMSTAT_logical_end
if (!(info->items = realloc(info->items, sizeof(enum vmstat_item) * (numitems + 1))))
return NULL;
memcpy(info->items, items, sizeof(enum vmstat_item) * numitems);
info->items[numitems] = VMSTAT_logical_end;
info->numitems = numitems + 1;
if (info->extents)
vmstat_extents_free_all(info);
}
if (!info->extents
&& (!vmstat_stacks_alloc(info, 1)))
return NULL;
if (info->dirty_stacks)
vmstat_cleanup_stacks_all(info);
if (vmstat_read_failed(info))
return NULL;
vmstat_assign_results(info->extents->stacks[0], &info->hist);
info->dirty_stacks = 1;
return info->extents->stacks[0];
} // end: procps_vmstat_select
// --- special debugging function(s) ------------------------------------------
/*
* The following isn't part of the normal programming interface. Rather,
* it exists to validate result types referenced in application programs.
*
* It's used only when:
* 1) the 'XTRA_PROCPS_DEBUG' has been defined, or
* 2) the '#include <proc/xtra-procps-debug.h>' used
*/
PROCPS_EXPORT struct vmstat_result *xtra_vmstat_get (
struct vmstat_info *info,
enum vmstat_item actual_enum,
const char *typestr,
const char *file,
int lineno)
{
struct vmstat_result *r = procps_vmstat_get(info, actual_enum);
if (actual_enum < 0 || actual_enum >= VMSTAT_logical_end) {
fprintf(stderr, "%s line %d: invalid item = %d, type = %s\n"
, file, lineno, actual_enum, typestr);
}
if (r) {
char *str = Item_table[r->item].type2str;
if (str[0]
&& (strcmp(typestr, str)))
fprintf(stderr, "%s line %d: was %s, expected %s\n", file, lineno, typestr, str);
}
return r;
} // end: xtra_vmstat_get_
PROCPS_EXPORT struct vmstat_result *xtra_vmstat_val (
int relative_enum,
const char *typestr,
const struct vmstat_stack *stack,
struct vmstat_info *info,
const char *file,
int lineno)
{
char *str;
int i;
for (i = 0; stack->head[i].item < VMSTAT_logical_end; i++)
;
if (relative_enum < 0 || relative_enum >= i) {
fprintf(stderr, "%s line %d: invalid relative_enum = %d, type = %s\n"
, file, lineno, relative_enum, typestr);
return NULL;
}
str = Item_table[stack->head[relative_enum].item].type2str;
if (str[0]
&& (strcmp(typestr, str))) {
fprintf(stderr, "%s line %d: was %s, expected %s\n", file, lineno, typestr, str);
}
return &stack->head[relative_enum];
} // end: xtra_vmstat_val
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