4a0e974b7f
Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
1064 lines
36 KiB
C
1064 lines
36 KiB
C
/*
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* slabinfo.c - slabinfo related functions for libproc
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*
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* Chris Rivera <cmrivera@ufl.edu>
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* Robert Love <rml@tech9.net>
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*
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* Copyright (C) 2003 Chris Rivera
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* Copyright (C) 2004 Albert Cahalan
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* Copyright (C) 2015 Craig Small <csmall@enc.com.au>
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* Copyright (C) 2016 Jim Warnerl <james.warner@comcast.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <proc/procps-private.h>
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#include <proc/slabinfo.h>
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#define SLABINFO_FILE "/proc/slabinfo"
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#define SLABINFO_LINE_LEN 2048
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#define SLAB_INFO_NAME_LEN 128
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/*
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Because 'select' could, at most, return only node[0] values and since 'reap' |
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would be forced to duplicate global slabs stuff in every node results stack, |
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the following #define can be used to enforce strictly logical return values. |
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select: allow only PROCPS_SLABINFO & PROCPS_SLABS items
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reap: allow only PROCPS_SLABINFO & PROCPS_SLABNODE items
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Without the #define, these functions always return something even if just 0. |
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get: return only PROCPS_SLABS results, else 0
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select: return only PROCPS_SLABINFO & PROCPS_SLABS results, else zero
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reap: return any requested, even when duplicated in each node's stack */
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//#define ENFORCE_LOGICAL // ensure only logical items accepted by select/reap
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struct slabs_summ {
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unsigned int nr_objs; /* number of objects, among all caches */
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unsigned int nr_active_objs; /* number of active objects, among all caches */
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unsigned int nr_pages; /* number of pages consumed by all objects */
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unsigned int nr_slabs; /* number of slabs, among all caches */
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unsigned int nr_active_slabs; /* number of active slabs, among all caches */
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unsigned int nr_caches; /* number of caches */
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unsigned int nr_active_caches; /* number of active caches */
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unsigned int avg_obj_size; /* average object size */
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unsigned int min_obj_size; /* size of smallest object */
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unsigned int max_obj_size; /* size of largest object */
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unsigned long active_size; /* size of all active objects */
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unsigned long total_size; /* size of all objects */
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};
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struct slabs_node {
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char name[SLAB_INFO_NAME_LEN]; /* name of this cache */
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unsigned long cache_size; /* size of entire cache */
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unsigned int nr_objs; /* number of objects in this cache */
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unsigned int nr_active_objs; /* number of active objects */
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unsigned int obj_size; /* size of each object */
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unsigned int objs_per_slab; /* number of objects per slab */
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unsigned int pages_per_slab; /* number of pages per slab */
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unsigned int nr_slabs; /* number of slabs in this cache */
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unsigned int nr_active_slabs; /* number of active slabs */
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unsigned int use; /* percent full: total / active */
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};
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struct slabs_hist {
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struct slabs_summ new;
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struct slabs_summ old;
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};
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struct stacks_extent {
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int ext_numstacks;
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struct stacks_extent *next;
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struct slabinfo_stack **stacks;
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};
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struct ext_support {
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int numitems; // includes 'logical_end' delimiter
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enum slabinfo_item *items; // includes 'logical_end' delimiter
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struct stacks_extent *extents; // anchor for these extents
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#ifdef ENFORCE_LOGICAL
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enum slabinfo_item lowest; // range of allowable enums
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enum slabinfo_item highest;
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#endif
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int dirty_stacks;
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};
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struct fetch_support {
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struct slabinfo_stack **anchor; // fetch consolidated extents
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int n_alloc; // number of above pointers allocated
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int n_inuse; // number of above pointers occupied
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int n_alloc_save; // last known reap.stacks allocation
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struct slabinfo_reap results; // count + stacks for return to caller
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};
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struct procps_slabinfo {
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int refcount;
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FILE *slabinfo_fp;
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int slabinfo_was_read;
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int nodes_alloc; /* nodes alloc()ed */
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int nodes_used; /* nodes using alloced memory */
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struct slabs_node *nodes; /* first slabnode of this list */
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struct slabs_hist hist; /* new/old slabs_summ data */
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struct ext_support select_ext; /* supports concurrent select/reap */
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struct ext_support fetch_ext; /* supports concurrent select/reap */
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struct fetch_support fetch; /* support for procps_slabinfo_reap */
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struct slabs_node nul_node; /* used by procps_slabinfo_select */
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};
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// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
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#define setNAME(e) set_results_ ## e
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#define setDECL(e) static void setNAME(e) \
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(struct slabinfo_result *R, struct slabs_hist *S, struct slabs_node *N)
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// regular assignment
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#define REG_set(e,t,x) setDECL(e) { (void)N; R->result. t = S->new . x; }
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#define NOD_set(e,t,x) setDECL(e) { (void)S; R->result. t = N-> x; }
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// delta assignment
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#define HST_set(e,t,x) setDECL(e) { (void)N; R->result. t = (signed long)S->new . x - S->old. x; }
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setDECL(noop) { (void)R; (void)S; (void)N; }
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setDECL(extra) { (void)R; (void)S; (void)N; }
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REG_set(SLABS_OBJS, u_int, nr_objs)
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REG_set(SLABS_AOBJS, u_int, nr_active_objs)
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REG_set(SLABS_PAGES, u_int, nr_pages)
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REG_set(SLABS_SLABS, u_int, nr_slabs)
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REG_set(SLABS_ASLABS, u_int, nr_active_slabs)
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REG_set(SLABS_CACHES, u_int, nr_caches)
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REG_set(SLABS_ACACHES, u_int, nr_active_caches)
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REG_set(SLABS_SIZE_AVG, u_int, avg_obj_size)
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REG_set(SLABS_SIZE_MIN, u_int, min_obj_size)
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REG_set(SLABS_SIZE_MAX, u_int, max_obj_size)
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REG_set(SLABS_SIZE_ACTIVE, ul_int, active_size)
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REG_set(SLABS_SIZE_TOTAL, ul_int, total_size)
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HST_set(SLABS_DELTA_OBJS, s_int, nr_objs)
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HST_set(SLABS_DELTA_AOBJS, s_int, nr_active_objs)
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HST_set(SLABS_DELTA_PAGES, s_int, nr_pages)
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HST_set(SLABS_DELTA_SLABS, s_int, nr_slabs)
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HST_set(SLABS_DELTA_ASLABS, s_int, nr_active_slabs)
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HST_set(SLABS_DELTA_CACHES, s_int, nr_caches)
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HST_set(SLABS_DELTA_ACACHES, s_int, nr_active_caches)
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HST_set(SLABS_DELTA_SIZE_AVG, s_int, avg_obj_size)
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HST_set(SLABS_DELTA_SIZE_MIN, s_int, min_obj_size)
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HST_set(SLABS_DELTA_SIZE_MAX, s_int, max_obj_size)
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HST_set(SLABS_DELTA_SIZE_ACTIVE, s_int, active_size)
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HST_set(SLABS_DELTA_SIZE_TOTAL, s_int, total_size)
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NOD_set(SLABNODE_NAME, str, name)
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NOD_set(SLABNODE_OBJS, u_int, nr_objs)
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NOD_set(SLABNODE_AOBJS, u_int, nr_active_objs)
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NOD_set(SLABNODE_OBJ_SIZE, u_int, obj_size)
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NOD_set(SLABNODE_OBJS_PER_SLAB, u_int, objs_per_slab)
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NOD_set(SLABNODE_PAGES_PER_SLAB, u_int, pages_per_slab)
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NOD_set(SLABNODE_SLABS, u_int, nr_slabs)
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NOD_set(SLABNODE_ASLABS, u_int, nr_active_slabs)
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NOD_set(SLABNODE_USE, u_int, use)
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NOD_set(SLABNODE_SIZE, ul_int, cache_size)
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#undef setDECL
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#undef REG_set
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#undef NOD_set
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#undef HST_set
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// ___ Results 'Get' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
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#define getNAME(e) get_results_ ## e
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#define getDECL(e) static signed long getNAME(e) \
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(struct procps_slabinfo *I)
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// regular get
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#define REG_get(e,t,x) getDECL(e) { return I->hist.new. x; }
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// delta get
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#define HST_get(e,t,x) getDECL(e) { return (signed long)I->hist.new. x - I->hist.old. x; }
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// illogical get
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#define NOT_get(e) getDECL(e) { (void)I; return 0; }
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NOT_get(noop)
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NOT_get(extra)
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REG_get(SLABS_OBJS, u_int, nr_objs)
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REG_get(SLABS_AOBJS, u_int, nr_active_objs)
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REG_get(SLABS_PAGES, u_int, nr_pages)
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REG_get(SLABS_SLABS, u_int, nr_slabs)
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REG_get(SLABS_ASLABS, u_int, nr_active_slabs)
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REG_get(SLABS_CACHES, u_int, nr_caches)
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REG_get(SLABS_ACACHES, u_int, nr_active_caches)
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REG_get(SLABS_SIZE_AVG, u_int, avg_obj_size)
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REG_get(SLABS_SIZE_MIN, u_int, min_obj_size)
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REG_get(SLABS_SIZE_MAX, u_int, max_obj_size)
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REG_get(SLABS_SIZE_ACTIVE, ul_int, active_size)
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REG_get(SLABS_SIZE_TOTAL, ul_int, total_size)
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HST_get(SLABS_DELTA_OBJS, s_int, nr_objs)
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HST_get(SLABS_DELTA_AOBJS, s_int, nr_active_objs)
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HST_get(SLABS_DELTA_PAGES, s_int, nr_pages)
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HST_get(SLABS_DELTA_SLABS, s_int, nr_slabs)
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HST_get(SLABS_DELTA_ASLABS, s_int, nr_active_slabs)
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HST_get(SLABS_DELTA_CACHES, s_int, nr_caches)
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HST_get(SLABS_DELTA_ACACHES, s_int, nr_active_caches)
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HST_get(SLABS_DELTA_SIZE_AVG, s_int, avg_obj_size)
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HST_get(SLABS_DELTA_SIZE_MIN, s_int, min_obj_size)
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HST_get(SLABS_DELTA_SIZE_MAX, s_int, max_obj_size)
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HST_get(SLABS_DELTA_SIZE_ACTIVE, s_int, active_size)
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HST_get(SLABS_DELTA_SIZE_TOTAL, s_int, total_size)
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NOT_get(SLABNODE_NAME)
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NOT_get(SLABNODE_OBJS)
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NOT_get(SLABNODE_AOBJS)
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NOT_get(SLABNODE_OBJ_SIZE)
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NOT_get(SLABNODE_OBJS_PER_SLAB)
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NOT_get(SLABNODE_PAGES_PER_SLAB)
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NOT_get(SLABNODE_SLABS)
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NOT_get(SLABNODE_ASLABS)
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NOT_get(SLABNODE_USE)
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NOT_get(SLABNODE_SIZE)
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#undef getDECL
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#undef REG_get
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#undef HST_get
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#undef NOT_get
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// ___ Sorting Support ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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struct sort_parms {
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int offset;
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enum slabinfo_sort_order order;
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};
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#define srtNAME(t) sort_results_ ## t
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#define srtDECL(t) static int srtNAME(t) \
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(const struct slabinfo_stack **A, const struct slabinfo_stack **B, struct sort_parms *P)
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srtDECL(u_int) {
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const struct slabinfo_result *a = (*A)->head + P->offset; \
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const struct slabinfo_result *b = (*B)->head + P->offset; \
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if ( a->result.u_int > b->result.u_int ) return P->order > 0 ? 1 : -1; \
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if ( a->result.u_int < b->result.u_int ) return P->order > 0 ? -1 : 1; \
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return 0;
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}
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srtDECL(ul_int) {
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const struct slabinfo_result *a = (*A)->head + P->offset; \
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const struct slabinfo_result *b = (*B)->head + P->offset; \
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if ( a->result.ul_int > b->result.ul_int ) return P->order > 0 ? 1 : -1; \
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if ( a->result.ul_int < b->result.ul_int ) return P->order > 0 ? -1 : 1; \
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return 0;
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}
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srtDECL(str) {
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const struct slabinfo_result *a = (*A)->head + P->offset;
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const struct slabinfo_result *b = (*B)->head + P->offset;
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return P->order * strcoll(a->result.str, b->result.str);
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}
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srtDECL(noop) { \
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(void)A; (void)B; (void)P; \
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return 0;
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}
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#undef srtDECL
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// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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typedef void (*SET_t)(struct slabinfo_result *, struct slabs_hist *, struct slabs_node *);
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#define RS(e) (SET_t)setNAME(e)
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typedef signed long (*GET_t)(struct procps_slabinfo *);
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#define RG(e) (GET_t)getNAME(e)
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typedef int (*QSR_t)(const void *, const void *, void *);
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#define QS(t) (QSR_t)srtNAME(t)
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/*
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* Need it be said?
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* This table must be kept in the exact same order as
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* those *enum slabinfo_item* guys ! */
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static struct {
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SET_t setsfunc; // the actual result setting routine
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GET_t getsfunc; // a routine to return single result
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QSR_t sortfunc; // sort cmp func for a specific type
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} Item_table[] = {
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/* setsfunc getsfunc sortfunc
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--------------------------- --------------------------- --------- */
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{ RS(noop), RG(noop), QS(ul_int) },
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{ RS(extra), RG(extra), QS(noop) },
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{ RS(SLABS_OBJS), RG(SLABS_OBJS), QS(noop) },
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{ RS(SLABS_AOBJS), RG(SLABS_AOBJS), QS(noop) },
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{ RS(SLABS_PAGES), RG(SLABS_PAGES), QS(noop) },
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{ RS(SLABS_SLABS), RG(SLABS_SLABS), QS(noop) },
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{ RS(SLABS_ASLABS), RG(SLABS_ASLABS), QS(noop) },
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{ RS(SLABS_CACHES), RG(SLABS_CACHES), QS(noop) },
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{ RS(SLABS_ACACHES), RG(SLABS_ACACHES), QS(noop) },
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{ RS(SLABS_SIZE_AVG), RG(SLABS_SIZE_AVG), QS(noop) },
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{ RS(SLABS_SIZE_MIN), RG(SLABS_SIZE_MIN), QS(noop) },
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{ RS(SLABS_SIZE_MAX), RG(SLABS_SIZE_MAX), QS(noop) },
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{ RS(SLABS_SIZE_ACTIVE), RG(SLABS_SIZE_ACTIVE), QS(noop) },
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{ RS(SLABS_SIZE_TOTAL), RG(SLABS_SIZE_TOTAL), QS(noop) },
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{ RS(SLABS_DELTA_OBJS), RG(SLABS_DELTA_OBJS), QS(noop) },
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{ RS(SLABS_DELTA_AOBJS), RG(SLABS_DELTA_AOBJS), QS(noop) },
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{ RS(SLABS_DELTA_PAGES), RG(SLABS_DELTA_PAGES), QS(noop) },
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{ RS(SLABS_DELTA_SLABS), RG(SLABS_DELTA_SLABS), QS(noop) },
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{ RS(SLABS_DELTA_ASLABS), RG(SLABS_DELTA_ASLABS), QS(noop) },
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{ RS(SLABS_DELTA_CACHES), RG(SLABS_DELTA_CACHES), QS(noop) },
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{ RS(SLABS_DELTA_ACACHES), RG(SLABS_DELTA_ACACHES), QS(noop) },
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{ RS(SLABS_DELTA_SIZE_AVG), RG(SLABS_DELTA_SIZE_AVG), QS(noop) },
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{ RS(SLABS_DELTA_SIZE_MIN), RG(SLABS_DELTA_SIZE_MIN), QS(noop) },
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{ RS(SLABS_DELTA_SIZE_MAX), RG(SLABS_DELTA_SIZE_MAX), QS(noop) },
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{ RS(SLABS_DELTA_SIZE_ACTIVE), RG(SLABS_DELTA_SIZE_ACTIVE), QS(noop) },
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{ RS(SLABS_DELTA_SIZE_TOTAL), RG(SLABS_DELTA_SIZE_TOTAL), QS(noop) },
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{ RS(SLABNODE_NAME), RG(SLABNODE_NAME), QS(str) },
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{ RS(SLABNODE_OBJS), RG(SLABNODE_OBJS), QS(u_int) },
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{ RS(SLABNODE_AOBJS), RG(SLABNODE_AOBJS), QS(u_int) },
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{ RS(SLABNODE_OBJ_SIZE), RG(SLABNODE_OBJ_SIZE), QS(u_int) },
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{ RS(SLABNODE_OBJS_PER_SLAB), RG(SLABNODE_OBJS_PER_SLAB), QS(u_int) },
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{ RS(SLABNODE_PAGES_PER_SLAB), RG(SLABNODE_PAGES_PER_SLAB), QS(u_int) },
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{ RS(SLABNODE_SLABS), RG(SLABNODE_SLABS), QS(u_int) },
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{ RS(SLABNODE_ASLABS), RG(SLABNODE_ASLABS), QS(u_int) },
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{ RS(SLABNODE_USE), RG(SLABNODE_USE), QS(u_int) },
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{ RS(SLABNODE_SIZE), RG(SLABNODE_SIZE), QS(ul_int) },
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|
|
// dummy entry corresponding to PROCPS_SLABINFO_logical_end ...
|
|
{ NULL, NULL, NULL }
|
|
};
|
|
|
|
/* please note,
|
|
* this enum MUST be 1 greater than the highest value of any enum */
|
|
enum slabinfo_item PROCPS_SLABINFO_logical_end = PROCPS_SLABNODE_SIZE + 1;
|
|
|
|
#undef setNAME
|
|
#undef getNAME
|
|
#undef srtNAME
|
|
#undef RS
|
|
#undef RG
|
|
#undef QS
|
|
|
|
|
|
// ___ Private Functions ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
// --- slabnode specific support ----------------------------------------------
|
|
|
|
/* Alloc up more slabnode memory, if required
|
|
*/
|
|
static int alloc_slabnodes (
|
|
struct procps_slabinfo *info)
|
|
{
|
|
struct slabs_node *new_nodes;
|
|
int new_count;
|
|
|
|
if (info->nodes_used < info->nodes_alloc)
|
|
return 0;
|
|
/* Increment the allocated number of slabs */
|
|
new_count = info->nodes_alloc * 5/4+30;
|
|
|
|
new_nodes = realloc(info->nodes, sizeof(struct slabs_node) * new_count);
|
|
if (!new_nodes)
|
|
return -ENOMEM;
|
|
info->nodes = new_nodes;
|
|
info->nodes_alloc = new_count;
|
|
return 0;
|
|
} // end: alloc_slabnodes
|
|
|
|
|
|
/*
|
|
* get_slabnode - allocate slab_info structures using a free list
|
|
*
|
|
* In the fast path, we simply return a node off the free list. In the slow
|
|
* list, we malloc() a new node. The free list is never automatically reaped,
|
|
* both for simplicity and because the number of slab caches is fairly
|
|
* constant.
|
|
*/
|
|
static int get_slabnode (
|
|
struct procps_slabinfo *info,
|
|
struct slabs_node **node)
|
|
{
|
|
int retval;
|
|
|
|
if (info->nodes_used == info->nodes_alloc) {
|
|
if ((retval = alloc_slabnodes(info)) < 0)
|
|
return retval;
|
|
}
|
|
*node = &(info->nodes[info->nodes_used++]);
|
|
return 0;
|
|
} // end: get_slabnode
|
|
|
|
|
|
/* parse_slabinfo20:
|
|
*
|
|
* sactual parse routine for slabinfo 2.x (2.6 kernels)
|
|
* Note: difference between 2.0 and 2.1 is in the ": globalstat" part where version 2.1
|
|
* has extra column <nodeallocs>. We don't use ": globalstat" part in both versions.
|
|
*
|
|
* Formats (we don't use "statistics" extensions)
|
|
*
|
|
* slabinfo - version: 2.1
|
|
* # name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> \
|
|
* : tunables <batchcount> <limit> <sharedfactor> \
|
|
* : slabdata <active_slabs> <num_slabs> <sharedavail>
|
|
*
|
|
* slabinfo - version: 2.1 (statistics)
|
|
* # name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> \
|
|
* : tunables <batchcount> <limit> <sharedfactor> \
|
|
* : slabdata <active_slabs> <num_slabs> <sharedavail> \
|
|
* : globalstat <listallocs> <maxobjs> <grown> <reaped> <error> <maxfreeable> <freelimit> <nodeallocs> \
|
|
* : cpustat <allochit> <allocmiss> <freehit> <freemiss>
|
|
*
|
|
* slabinfo - version: 2.0
|
|
* # name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> \
|
|
* : tunables <batchcount> <limit> <sharedfactor> \
|
|
* : slabdata <active_slabs> <num_slabs> <sharedavail>
|
|
*
|
|
* slabinfo - version: 2.0 (statistics)
|
|
* # name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> \
|
|
* : tunables <batchcount> <limit> <sharedfactor> \
|
|
* : slabdata <active_slabs> <num_slabs> <sharedavail> \
|
|
* : globalstat <listallocs> <maxobjs> <grown> <reaped> <error> <maxfreeable> <freelimit> \
|
|
* : cpustat <allochit> <allocmiss> <freehit> <freemiss>
|
|
*/
|
|
static int parse_slabinfo20 (
|
|
struct procps_slabinfo *info)
|
|
{
|
|
struct slabs_node *node;
|
|
char buffer[SLABINFO_LINE_LEN];
|
|
int retval;
|
|
int page_size = getpagesize();
|
|
struct slabs_summ *hist = &(info->hist.new);
|
|
|
|
hist->min_obj_size = INT_MAX;
|
|
hist->max_obj_size = 0;
|
|
|
|
while (fgets(buffer, SLABINFO_LINE_LEN, info->slabinfo_fp )) {
|
|
if (buffer[0] == '#')
|
|
continue;
|
|
|
|
if ((retval = get_slabnode(info, &node)) < 0)
|
|
return retval;
|
|
|
|
if (sscanf(buffer,
|
|
"%" STRINGIFY(SLAB_INFO_NAME_LEN) "s" \
|
|
"%u %u %u %u %u : tunables %*u %*u %*u : slabdata %u %u %*u",
|
|
node->name,
|
|
&node->nr_active_objs, &node->nr_objs,
|
|
&node->obj_size, &node->objs_per_slab,
|
|
&node->pages_per_slab, &node->nr_active_slabs,
|
|
&node->nr_slabs) < 8) {
|
|
if (errno != 0)
|
|
return -errno;
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!node->name[0])
|
|
snprintf(node->name, sizeof(node->name), "%s", "unknown");
|
|
|
|
if (node->obj_size < hist->min_obj_size)
|
|
hist->min_obj_size = node->obj_size;
|
|
if (node->obj_size > hist->max_obj_size)
|
|
hist->max_obj_size = node->obj_size;
|
|
|
|
node->cache_size = (unsigned long)node->nr_slabs * node->pages_per_slab
|
|
* page_size;
|
|
|
|
if (node->nr_objs) {
|
|
node->use = (unsigned int)100 * (node->nr_active_objs / node->nr_objs);
|
|
hist->nr_active_caches++;
|
|
} else
|
|
node->use = 0;
|
|
|
|
hist->nr_objs += node->nr_objs;
|
|
hist->nr_active_objs += node->nr_active_objs;
|
|
hist->total_size += (unsigned long)node->nr_objs * node->obj_size;
|
|
hist->active_size += (unsigned long)node->nr_active_objs * node->obj_size;
|
|
hist->nr_pages += node->nr_slabs * node->pages_per_slab;
|
|
hist->nr_slabs += node->nr_slabs;
|
|
hist->nr_active_slabs += node->nr_active_slabs;
|
|
hist->nr_caches++;
|
|
}
|
|
|
|
if (hist->nr_objs)
|
|
hist->avg_obj_size = hist->total_size / hist->nr_objs;
|
|
|
|
return 0;
|
|
} // end: parse_slabinfo20
|
|
|
|
|
|
/* read_slabinfo_failed():
|
|
*
|
|
* Read the data out of /proc/slabinfo putting the information
|
|
* into the supplied info container
|
|
*
|
|
* Returns: 0 on success, negative on error
|
|
*/
|
|
static int read_slabinfo_failed (
|
|
struct procps_slabinfo *info)
|
|
{
|
|
char line[SLABINFO_LINE_LEN];
|
|
int retval, major, minor;
|
|
|
|
memcpy(&info->hist.old, &info->hist.new, sizeof(struct slabs_summ));
|
|
memset(&(info->hist.new), 0, sizeof(struct slabs_summ));
|
|
if ((retval = alloc_slabnodes(info)) < 0)
|
|
return retval;
|
|
|
|
memset(info->nodes, 0, sizeof(struct slabs_node)*info->nodes_alloc);
|
|
info->nodes_used = 0;
|
|
|
|
if (NULL == info->slabinfo_fp
|
|
&& (info->slabinfo_fp = fopen(SLABINFO_FILE, "r")) == NULL)
|
|
return -errno;
|
|
|
|
if (fseek(info->slabinfo_fp, 0L, SEEK_SET) < 0)
|
|
return -errno;
|
|
|
|
/* Parse the version string */
|
|
if (!fgets(line, SLABINFO_LINE_LEN, info->slabinfo_fp))
|
|
return -errno;
|
|
|
|
if (sscanf(line, "slabinfo - version: %d.%d", &major, &minor) != 2)
|
|
return -EINVAL;
|
|
|
|
if (major == 2)
|
|
retval = parse_slabinfo20(info);
|
|
else
|
|
return -ERANGE;
|
|
|
|
if (!info->slabinfo_was_read)
|
|
memcpy(&info->hist.old, &info->hist.new, sizeof(struct slabs_summ));
|
|
info->slabinfo_was_read = 1;
|
|
|
|
return retval;
|
|
} // end: read_slabinfo_failed
|
|
|
|
|
|
// ___ Private Functions ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
// --- generalized support ----------------------------------------------------
|
|
|
|
static inline void assign_results (
|
|
struct slabinfo_stack *stack,
|
|
struct slabs_hist *summ,
|
|
struct slabs_node *node)
|
|
{
|
|
struct slabinfo_result *this = stack->head;
|
|
|
|
for (;;) {
|
|
enum slabinfo_item item = this->item;
|
|
if (item >= PROCPS_SLABINFO_logical_end)
|
|
break;
|
|
Item_table[item].setsfunc(this, summ, node);
|
|
++this;
|
|
}
|
|
return;
|
|
} // end: assign_results
|
|
|
|
|
|
static inline void cleanup_stack (
|
|
struct slabinfo_result *this)
|
|
{
|
|
for (;;) {
|
|
if (this->item >= PROCPS_SLABINFO_logical_end)
|
|
break;
|
|
if (this->item > PROCPS_SLABINFO_noop)
|
|
this->result.ul_int = 0;
|
|
++this;
|
|
}
|
|
} // end: cleanup_stack
|
|
|
|
|
|
static inline void cleanup_stacks_all (
|
|
struct ext_support *this)
|
|
{
|
|
int i;
|
|
struct stacks_extent *ext = this->extents;
|
|
|
|
while (ext) {
|
|
for (i = 0; ext->stacks[i]; i++)
|
|
cleanup_stack(ext->stacks[i]->head);
|
|
ext = ext->next;
|
|
};
|
|
this->dirty_stacks = 0;
|
|
} // end: cleanup_stacks_all
|
|
|
|
|
|
static void extents_free_all (
|
|
struct ext_support *this)
|
|
{
|
|
do {
|
|
struct stacks_extent *p = this->extents;
|
|
this->extents = this->extents->next;
|
|
free(p);
|
|
} while (this->extents);
|
|
} // end: extents_free_all
|
|
|
|
|
|
static inline struct slabinfo_result *itemize_stack (
|
|
struct slabinfo_result *p,
|
|
int depth,
|
|
enum slabinfo_item *items)
|
|
{
|
|
struct slabinfo_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: itemize_stack
|
|
|
|
|
|
static void itemize_stacks_all (
|
|
struct ext_support *this)
|
|
{
|
|
struct stacks_extent *ext = this->extents;
|
|
|
|
while (ext) {
|
|
int i;
|
|
for (i = 0; ext->stacks[i]; i++)
|
|
itemize_stack(ext->stacks[i]->head, this->numitems, this->items);
|
|
ext = ext->next;
|
|
};
|
|
this->dirty_stacks = 0;
|
|
} // end: static void itemize_stacks_all
|
|
|
|
|
|
static inline int items_check_failed (
|
|
struct ext_support *this,
|
|
enum slabinfo_item *items,
|
|
int numitems)
|
|
{
|
|
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 slabinfo_item *'
|
|
* my_stack = procps_slabinfo_select(info, PROCPS_SLABINFO_noop, num);
|
|
* ^~~~~~~~~~~~~~~~
|
|
*/
|
|
if (numitems < 1
|
|
|| (void *)items < (void *)(unsigned long)(2 * PROCPS_SLABINFO_logical_end))
|
|
return -1;
|
|
|
|
for (i = 0; i < numitems; i++) {
|
|
#ifdef ENFORCE_LOGICAL
|
|
if (items[i] == PROCPS_SLABINFO_noop
|
|
|| (items[i] == PROCPS_SLABINFO_extra))
|
|
continue;
|
|
if (items[i] < this->lowest
|
|
|| (items[i] > this->highest))
|
|
return -1;
|
|
#else
|
|
// a slabinfo_item is currently unsigned, but we'll protect our future
|
|
if (items[i] < 0)
|
|
return -1;
|
|
if (items[i] >= PROCPS_SLABINFO_logical_end)
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
} // end: items_check_failed
|
|
|
|
|
|
static struct stacks_extent *stacks_alloc (
|
|
struct ext_support *this,
|
|
int maxstacks)
|
|
{
|
|
struct stacks_extent *p_blob;
|
|
struct slabinfo_stack **p_vect;
|
|
struct slabinfo_stack *p_head;
|
|
size_t vect_size, head_size, list_size, blob_size;
|
|
void *v_head, *v_list;
|
|
int i;
|
|
|
|
if (this == NULL || this->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 slabinfo_stack); // size of that head struct |
|
|
list_size = sizeof(struct slabinfo_result)*this->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 = this->extents; // push this extent onto... |
|
|
this->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 slabinfo_stack *)v_head;
|
|
p_head->head = itemize_stack((struct slabinfo_result *)v_list, this->numitems, this->items);
|
|
p_blob->stacks[i] = p_head;
|
|
v_list += list_size;
|
|
v_head += head_size;
|
|
}
|
|
p_blob->ext_numstacks = maxstacks;
|
|
return p_blob;
|
|
} // end: stacks_alloc
|
|
|
|
|
|
static int stacks_fetch (
|
|
struct procps_slabinfo *info)
|
|
{
|
|
#define memINCR 64
|
|
#define n_alloc info->fetch.n_alloc
|
|
#define n_inuse info->fetch.n_inuse
|
|
#define n_saved info->fetch.n_alloc_save
|
|
struct stacks_extent *ext;
|
|
|
|
// initialize stuff -----------------------------------
|
|
if (!info->fetch.anchor) {
|
|
if (!(info->fetch.anchor = calloc(sizeof(void *), memINCR)))
|
|
return -ENOMEM;
|
|
n_alloc = memINCR;
|
|
}
|
|
if (!info->fetch_ext.extents) {
|
|
if (!(ext = stacks_alloc(&info->fetch_ext, n_alloc)))
|
|
return -ENOMEM;
|
|
memset(info->fetch.anchor, 0, sizeof(void *) * n_alloc);
|
|
memcpy(info->fetch.anchor, ext->stacks, sizeof(void *) * n_alloc);
|
|
itemize_stacks_all(&info->fetch_ext);
|
|
}
|
|
cleanup_stacks_all(&info->fetch_ext);
|
|
|
|
// iterate stuff --------------------------------------
|
|
n_inuse = 0;
|
|
while (n_inuse < info->nodes_used) {
|
|
if (!(n_inuse < n_alloc)) {
|
|
n_alloc += memINCR;
|
|
if ((!(info->fetch.anchor = realloc(info->fetch.anchor, sizeof(void *) * n_alloc)))
|
|
|| (!(ext = stacks_alloc(&info->fetch_ext, memINCR))))
|
|
return -1;
|
|
memcpy(info->fetch.anchor + n_inuse, ext->stacks, sizeof(void *) * memINCR);
|
|
}
|
|
assign_results(info->fetch.anchor[n_inuse], &info->hist, &info->nodes[n_inuse]);
|
|
++n_inuse;
|
|
}
|
|
|
|
// finalize stuff -------------------------------------
|
|
/* note: we go to this trouble of maintaining a duplicate of the consolidated |
|
|
extent stacks addresses represented as our 'anchor' since these ptrs |
|
|
are exposed to users ( um, not that we don't trust 'em or anything ) | */
|
|
if (n_saved < n_alloc + 1) {
|
|
n_saved = n_alloc + 1;
|
|
if (!(info->fetch.results.stacks = realloc(info->fetch.results.stacks, sizeof(void *) * n_saved)))
|
|
return -1;
|
|
}
|
|
memcpy(info->fetch.results.stacks, info->fetch.anchor, sizeof(void *) * n_inuse);
|
|
info->fetch.results.stacks[n_inuse] = NULL;
|
|
info->fetch.results.total = n_inuse;
|
|
|
|
return n_inuse;
|
|
#undef memINCR
|
|
#undef n_alloc
|
|
#undef n_inuse
|
|
#undef n_saved
|
|
} // end: stacks_fetch
|
|
|
|
|
|
static int stacks_reconfig_maybe (
|
|
struct ext_support *this,
|
|
enum slabinfo_item *items,
|
|
int numitems)
|
|
{
|
|
if (items_check_failed(this, items, numitems))
|
|
return -EINVAL;
|
|
/* is this the first time or have things changed since we were last called?
|
|
if so, gotta' redo all of our stacks stuff ... */
|
|
if (this->numitems != numitems + 1
|
|
|| memcmp(this->items, items, sizeof(enum slabinfo_item) * numitems)) {
|
|
// allow for our PROCPS_SLABINFO_logical_end
|
|
if (!(this->items = realloc(this->items, sizeof(enum slabinfo_item) * (numitems + 1))))
|
|
return -ENOMEM;
|
|
memcpy(this->items, items, sizeof(enum slabinfo_item) * numitems);
|
|
this->items[numitems] = PROCPS_SLABINFO_logical_end;
|
|
this->numitems = numitems + 1;
|
|
if (this->extents)
|
|
extents_free_all(this);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
} // end: stacks_reconfig_maybe
|
|
|
|
|
|
// ___ Public Functions |||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
|
// --- standard required functions --------------------------------------------
|
|
|
|
/*
|
|
* procps_slabinfo_new():
|
|
*
|
|
* @info: location of returned new structure
|
|
*
|
|
* Returns: 0 on success <0 on failure
|
|
*/
|
|
PROCPS_EXPORT int procps_slabinfo_new (
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struct procps_slabinfo **info)
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{
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struct procps_slabinfo *p;
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int rc;
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|
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if (info == NULL)
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return -EINVAL;
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|
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if (!(p = calloc(1, sizeof(struct procps_slabinfo))))
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return -ENOMEM;
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#ifdef ENFORCE_LOGICAL
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p->select_ext.lowest = PROCPS_SLABS_OBJS;
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p->select_ext.highest = PROCPS_SLABS_DELTA_SIZE_TOTAL;
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p->fetch_ext.lowest = PROCPS_SLABNODE_NAME;
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p->fetch_ext.highest = PROCPS_SLABNODE_SIZE;
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#endif
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p->refcount = 1;
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/* do a priming read here for the following potential benefits: |
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1) see if that caller's permissions were sufficient (root) |
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|
2) make delta results potentially useful, even if 1st time | */
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if ((rc = read_slabinfo_failed(p))) {
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procps_slabinfo_unref(&p);
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return rc;
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}
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*info = p;
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return 0;
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} // end: procps_slabinfo_new
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|
|
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|
PROCPS_EXPORT int procps_slabinfo_ref (
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struct procps_slabinfo *info)
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|
{
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if (info == NULL)
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return -EINVAL;
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|
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info->refcount++;
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return info->refcount;
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} // end: procps_slabinfo_ref
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|
|
|
|
|
PROCPS_EXPORT int procps_slabinfo_unref (
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struct procps_slabinfo **info)
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|
{
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if (info == NULL || *info == NULL)
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return -EINVAL;
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|
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(*info)->refcount--;
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|
if ((*info)->refcount == 0) {
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|
if ((*info)->slabinfo_fp) {
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fclose((*info)->slabinfo_fp);
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(*info)->slabinfo_fp = NULL;
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|
}
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|
if ((*info)->select_ext.extents)
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extents_free_all((&(*info)->select_ext));
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|
if ((*info)->select_ext.items)
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free((*info)->select_ext.items);
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|
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if ((*info)->fetch.anchor)
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free((*info)->fetch.anchor);
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if ((*info)->fetch.results.stacks)
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|
free((*info)->fetch.results.stacks);
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if ((*info)->fetch_ext.extents)
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|
extents_free_all(&(*info)->fetch_ext);
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|
if ((*info)->fetch_ext.items)
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|
free((*info)->fetch_ext.items);
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|
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|
free((*info)->nodes);
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|
|
|
free(*info);
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|
*info = NULL;
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|
|
|
return 0;
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|
}
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|
return (*info)->refcount;
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} // end: procps_slabinfo_unref
|
|
|
|
|
|
// --- variable interface functions -------------------------------------------
|
|
|
|
PROCPS_EXPORT signed long procps_slabinfo_get (
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|
struct procps_slabinfo *info,
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|
enum slabinfo_item item)
|
|
{
|
|
static time_t sav_secs;
|
|
time_t cur_secs;
|
|
int rc;
|
|
|
|
if (info == NULL)
|
|
return -EINVAL;
|
|
if (item < 0 || item >= PROCPS_SLABINFO_logical_end)
|
|
return -EINVAL;
|
|
|
|
/* we will NOT read the slabinfo 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 ((rc = read_slabinfo_failed(info)))
|
|
return rc;
|
|
sav_secs = cur_secs;
|
|
}
|
|
|
|
return Item_table[item].getsfunc(info);
|
|
} // end: procps_slabinfo_get
|
|
|
|
|
|
/* procps_slabinfo_reap():
|
|
*
|
|
* Harvest all the requested SLABNODE (individual nodes) information
|
|
* providing the result stacks along with the total number of nodes.
|
|
*
|
|
* Returns: pointer to a slabinfo_reap struct on success, NULL on error.
|
|
*/
|
|
PROCPS_EXPORT struct slabinfo_reap *procps_slabinfo_reap (
|
|
struct procps_slabinfo *info,
|
|
enum slabinfo_item *items,
|
|
int numitems)
|
|
{
|
|
if (info == NULL || items == NULL)
|
|
return NULL;
|
|
|
|
if (0 > stacks_reconfig_maybe(&info->fetch_ext, items, numitems))
|
|
return NULL;
|
|
|
|
if (info->fetch_ext.dirty_stacks)
|
|
cleanup_stacks_all(&info->fetch_ext);
|
|
|
|
if (read_slabinfo_failed(info))
|
|
return NULL;
|
|
stacks_fetch(info);
|
|
info->fetch_ext.dirty_stacks = 1;
|
|
|
|
return &info->fetch.results;
|
|
} // end: procps_slabinfo_reap
|
|
|
|
|
|
/* procps_slabinfo_select():
|
|
*
|
|
* Obtain all the requested SLABS (global) information then return
|
|
* it in a single library provided results stack.
|
|
*
|
|
* Returns: pointer to a slabinfo_stack struct on success, NULL on error.
|
|
*/
|
|
PROCPS_EXPORT struct slabinfo_stack *procps_slabinfo_select (
|
|
struct procps_slabinfo *info,
|
|
enum slabinfo_item *items,
|
|
int numitems)
|
|
{
|
|
if (info == NULL || items == NULL)
|
|
return NULL;
|
|
|
|
if (0 > stacks_reconfig_maybe(&info->select_ext, items, numitems))
|
|
return NULL;
|
|
|
|
if (!info->select_ext.extents
|
|
&& !(stacks_alloc(&info->select_ext, 1)))
|
|
return NULL;
|
|
|
|
if (info->select_ext.dirty_stacks)
|
|
cleanup_stacks_all(&info->select_ext);
|
|
|
|
if (read_slabinfo_failed(info))
|
|
return NULL;
|
|
assign_results(info->select_ext.extents->stacks[0], &info->hist, &info->nul_node);
|
|
info->select_ext.dirty_stacks = 1;
|
|
|
|
return info->select_ext.extents->stacks[0];
|
|
} // end: procps_slabinfo_select
|
|
|
|
|
|
/*
|
|
* procps_slabinfo_sort():
|
|
*
|
|
* Sort stacks anchored as 'heads' in the passed slabinfo_stack pointers
|
|
* array based on the designated sort enumerator.
|
|
*
|
|
* Returns those same addresses sorted.
|
|
*
|
|
* Note: all of the stacks must be homogeneous (of equal length and content).
|
|
*/
|
|
PROCPS_EXPORT struct slabinfo_stack **procps_slabinfo_sort (
|
|
struct procps_slabinfo *info,
|
|
struct slabinfo_stack *stacks[],
|
|
int numstacked,
|
|
enum slabinfo_item sortitem,
|
|
enum slabinfo_sort_order order)
|
|
{
|
|
struct slabinfo_result *p;
|
|
struct sort_parms parms;
|
|
int offset;
|
|
|
|
if (info == NULL || stacks == NULL)
|
|
return NULL;
|
|
|
|
// a slabinfo_item is currently unsigned, but we'll protect our future
|
|
if (sortitem < 0 || sortitem >= PROCPS_SLABINFO_logical_end)
|
|
return NULL;
|
|
if (order != PROCPS_SLABINFO_ASCEND && order != PROCPS_SLABINFO_DESCEND)
|
|
return NULL;
|
|
if (numstacked < 2)
|
|
return stacks;
|
|
|
|
offset = 0;
|
|
p = stacks[0]->head;
|
|
for (;;) {
|
|
if (p->item == sortitem)
|
|
break;
|
|
++offset;
|
|
if (p->item == PROCPS_SLABINFO_logical_end)
|
|
return NULL;
|
|
++p;
|
|
}
|
|
parms.offset = offset;
|
|
parms.order = order;
|
|
|
|
qsort_r(stacks, numstacked, sizeof(void *), (QSR_t)Item_table[p->item].sortfunc, &parms);
|
|
return stacks;
|
|
} // end: procps_slabinfo_sort
|