The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/vm/uma.h

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    1 /*-
    2  * Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org>
    3  * Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice unmodified, this list of conditions, and the following
   11  *    disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/8.0/sys/vm/uma.h 187681 2009-01-25 09:11:24Z jeff $
   28  *
   29  */
   30 
   31 /*
   32  * uma.h - External definitions for the Universal Memory Allocator
   33  *
   34 */
   35 
   36 #ifndef VM_UMA_H
   37 #define VM_UMA_H
   38 
   39 #include <sys/param.h>          /* For NULL */
   40 #include <sys/malloc.h>         /* For M_* */
   41 
   42 /* User visible parameters */
   43 #define UMA_SMALLEST_UNIT       (PAGE_SIZE / 256) /* Smallest item allocated */
   44 
   45 /* Types and type defs */
   46 
   47 struct uma_zone;
   48 /* Opaque type used as a handle to the zone */
   49 typedef struct uma_zone * uma_zone_t;
   50 
   51 void zone_drain(uma_zone_t);
   52 
   53 /* 
   54  * Item constructor
   55  *
   56  * Arguments:
   57  *      item  A pointer to the memory which has been allocated.
   58  *      arg   The arg field passed to uma_zalloc_arg
   59  *      size  The size of the allocated item
   60  *      flags See zalloc flags
   61  * 
   62  * Returns:
   63  *      0      on success
   64  *      errno  on failure
   65  *
   66  * Discussion:
   67  *      The constructor is called just before the memory is returned
   68  *      to the user. It may block if necessary.
   69  */
   70 typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags);
   71 
   72 /*
   73  * Item destructor
   74  *
   75  * Arguments:
   76  *      item  A pointer to the memory which has been allocated.
   77  *      size  The size of the item being destructed.
   78  *      arg   Argument passed through uma_zfree_arg
   79  * 
   80  * Returns:
   81  *      Nothing
   82  *
   83  * Discussion:
   84  *      The destructor may perform operations that differ from those performed
   85  *      by the initializer, but it must leave the object in the same state.
   86  *      This IS type stable storage.  This is called after EVERY zfree call.
   87  */
   88 typedef void (*uma_dtor)(void *mem, int size, void *arg);
   89 
   90 /* 
   91  * Item initializer
   92  *
   93  * Arguments:
   94  *      item  A pointer to the memory which has been allocated.
   95  *      size  The size of the item being initialized.
   96  *      flags See zalloc flags
   97  * 
   98  * Returns:
   99  *      0      on success
  100  *      errno  on failure
  101  *
  102  * Discussion:
  103  *      The initializer is called when the memory is cached in the uma zone. 
  104  *      The initializer and the destructor should leave the object in the same
  105  *      state.
  106  */
  107 typedef int (*uma_init)(void *mem, int size, int flags);
  108 
  109 /*
  110  * Item discard function
  111  *
  112  * Arguments:
  113  *      item  A pointer to memory which has been 'freed' but has not left the 
  114  *            zone's cache.
  115  *      size  The size of the item being discarded.
  116  *
  117  * Returns:
  118  *      Nothing
  119  *
  120  * Discussion:
  121  *      This routine is called when memory leaves a zone and is returned to the
  122  *      system for other uses.  It is the counter-part to the init function.
  123  */
  124 typedef void (*uma_fini)(void *mem, int size);
  125 
  126 /*
  127  * What's the difference between initializing and constructing?
  128  *
  129  * The item is initialized when it is cached, and this is the state that the 
  130  * object should be in when returned to the allocator. The purpose of this is
  131  * to remove some code which would otherwise be called on each allocation by
  132  * utilizing a known, stable state.  This differs from the constructor which
  133  * will be called on EVERY allocation.
  134  *
  135  * For example, in the initializer you may want to initialize embedded locks,
  136  * NULL list pointers, set up initial states, magic numbers, etc.  This way if
  137  * the object is held in the allocator and re-used it won't be necessary to
  138  * re-initialize it.
  139  *
  140  * The constructor may be used to lock a data structure, link it on to lists,
  141  * bump reference counts or total counts of outstanding structures, etc.
  142  *
  143  */
  144 
  145 
  146 /* Function proto types */
  147 
  148 /*
  149  * Create a new uma zone
  150  *
  151  * Arguments:
  152  *      name  The text name of the zone for debugging and stats. This memory
  153  *              should not be freed until the zone has been deallocated.
  154  *      size  The size of the object that is being created.
  155  *      ctor  The constructor that is called when the object is allocated.
  156  *      dtor  The destructor that is called when the object is freed.
  157  *      init  An initializer that sets up the initial state of the memory.
  158  *      fini  A discard function that undoes initialization done by init.
  159  *              ctor/dtor/init/fini may all be null, see notes above.
  160  *      align A bitmask that corresponds to the requested alignment
  161  *              eg 4 would be 0x3
  162  *      flags A set of parameters that control the behavior of the zone.
  163  *
  164  * Returns:
  165  *      A pointer to a structure which is intended to be opaque to users of
  166  *      the interface.  The value may be null if the wait flag is not set.
  167  */
  168 uma_zone_t uma_zcreate(char *name, size_t size, uma_ctor ctor, uma_dtor dtor,
  169                         uma_init uminit, uma_fini fini, int align,
  170                         u_int32_t flags);
  171 
  172 /*
  173  * Create a secondary uma zone
  174  *
  175  * Arguments:
  176  *      name  The text name of the zone for debugging and stats. This memory
  177  *              should not be freed until the zone has been deallocated.
  178  *      ctor  The constructor that is called when the object is allocated.
  179  *      dtor  The destructor that is called when the object is freed.
  180  *      zinit  An initializer that sets up the initial state of the memory
  181  *              as the object passes from the Keg's slab to the Zone's cache.
  182  *      zfini  A discard function that undoes initialization done by init
  183  *              as the object passes from the Zone's cache to the Keg's slab.
  184  *
  185  *              ctor/dtor/zinit/zfini may all be null, see notes above.
  186  *              Note that the zinit and zfini specified here are NOT
  187  *              exactly the same as the init/fini specified to uma_zcreate()
  188  *              when creating a master zone.  These zinit/zfini are called
  189  *              on the TRANSITION from keg to zone (and vice-versa). Once
  190  *              these are set, the primary zone may alter its init/fini
  191  *              (which are called when the object passes from VM to keg)
  192  *              using uma_zone_set_init/fini()) as well as its own
  193  *              zinit/zfini (unset by default for master zone) with
  194  *              uma_zone_set_zinit/zfini() (note subtle 'z' prefix).
  195  *
  196  *      master  A reference to this zone's Master Zone (Primary Zone),
  197  *              which contains the backing Keg for the Secondary Zone
  198  *              being added.
  199  *
  200  * Returns:
  201  *      A pointer to a structure which is intended to be opaque to users of
  202  *      the interface.  The value may be null if the wait flag is not set.
  203  */
  204 uma_zone_t uma_zsecond_create(char *name, uma_ctor ctor, uma_dtor dtor,
  205                     uma_init zinit, uma_fini zfini, uma_zone_t master);
  206 
  207 /*
  208  * Add a second master to a secondary zone.  This provides multiple data
  209  * backends for objects with the same size.  Both masters must have
  210  * compatible allocation flags.  Presently, UMA_ZONE_MALLOC type zones are
  211  * the only supported.
  212  *
  213  * Returns:
  214  *      Error on failure, 0 on success.
  215  */
  216 int uma_zsecond_add(uma_zone_t zone, uma_zone_t master);
  217 
  218 /*
  219  * Definitions for uma_zcreate flags
  220  *
  221  * These flags share space with UMA_ZFLAGs in uma_int.h.  Be careful not to
  222  * overlap when adding new features.  0xf0000000 is in use by uma_int.h.
  223  */
  224 #define UMA_ZONE_PAGEABLE       0x0001  /* Return items not fully backed by
  225                                            physical memory XXX Not yet */
  226 #define UMA_ZONE_ZINIT          0x0002  /* Initialize with zeros */
  227 #define UMA_ZONE_STATIC         0x0004  /* Statically sized zone */
  228 #define UMA_ZONE_OFFPAGE        0x0008  /* Force the slab structure allocation
  229                                            off of the real memory */
  230 #define UMA_ZONE_MALLOC         0x0010  /* For use by malloc(9) only! */
  231 #define UMA_ZONE_NOFREE         0x0020  /* Do not free slabs of this type! */
  232 #define UMA_ZONE_MTXCLASS       0x0040  /* Create a new lock class */
  233 #define UMA_ZONE_VM             0x0080  /*
  234                                          * Used for internal vm datastructures
  235                                          * only.
  236                                          */
  237 #define UMA_ZONE_HASH           0x0100  /*
  238                                          * Use a hash table instead of caching
  239                                          * information in the vm_page.
  240                                          */
  241 #define UMA_ZONE_SECONDARY      0x0200  /* Zone is a Secondary Zone */
  242 #define UMA_ZONE_REFCNT         0x0400  /* Allocate refcnts in slabs */
  243 #define UMA_ZONE_MAXBUCKET      0x0800  /* Use largest buckets */
  244 #define UMA_ZONE_CACHESPREAD    0x1000  /*
  245                                          * Spread memory start locations across
  246                                          * all possible cache lines.  May
  247                                          * require many virtually contiguous
  248                                          * backend pages and can fail early.
  249                                          */
  250 #define UMA_ZONE_VTOSLAB        0x2000  /* Zone uses vtoslab for lookup. */
  251 
  252 /*
  253  * These flags are shared between the keg and zone.  In zones wishing to add
  254  * new kegs these flags must be compatible.  Some are determined based on
  255  * physical parameters of the request and may not be provided by the consumer.
  256  */
  257 #define UMA_ZONE_INHERIT                                                \
  258     (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_HASH |               \
  259     UMA_ZONE_REFCNT | UMA_ZONE_VTOSLAB)
  260 
  261 /* Definitions for align */
  262 #define UMA_ALIGN_PTR   (sizeof(void *) - 1)    /* Alignment fit for ptr */
  263 #define UMA_ALIGN_LONG  (sizeof(long) - 1)      /* "" long */
  264 #define UMA_ALIGN_INT   (sizeof(int) - 1)       /* "" int */
  265 #define UMA_ALIGN_SHORT (sizeof(short) - 1)     /* "" short */
  266 #define UMA_ALIGN_CHAR  (sizeof(char) - 1)      /* "" char */
  267 #define UMA_ALIGN_CACHE (0 - 1)                 /* Cache line size align */
  268 
  269 /*
  270  * Destroys an empty uma zone.  If the zone is not empty uma complains loudly.
  271  *
  272  * Arguments:
  273  *      zone  The zone we want to destroy.
  274  *
  275  */
  276 void uma_zdestroy(uma_zone_t zone);
  277 
  278 /*
  279  * Allocates an item out of a zone
  280  *
  281  * Arguments:
  282  *      zone  The zone we are allocating from
  283  *      arg   This data is passed to the ctor function
  284  *      flags See sys/malloc.h for available flags.
  285  *
  286  * Returns:
  287  *      A non-null pointer to an initialized element from the zone is
  288  *      guaranteed if the wait flag is M_WAITOK.  Otherwise a null pointer
  289  *      may be returned if the zone is empty or the ctor failed.
  290  */
  291 
  292 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags);
  293 
  294 /*
  295  * Allocates an item out of a zone without supplying an argument
  296  *
  297  * This is just a wrapper for uma_zalloc_arg for convenience.
  298  *
  299  */
  300 static __inline void *uma_zalloc(uma_zone_t zone, int flags);
  301 
  302 static __inline void *
  303 uma_zalloc(uma_zone_t zone, int flags)
  304 {
  305         return uma_zalloc_arg(zone, NULL, flags);
  306 }
  307 
  308 /*
  309  * Frees an item back into the specified zone.
  310  *
  311  * Arguments:
  312  *      zone  The zone the item was originally allocated out of.
  313  *      item  The memory to be freed.
  314  *      arg   Argument passed to the destructor
  315  *
  316  * Returns:
  317  *      Nothing.
  318  */
  319 
  320 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg);
  321 
  322 /*
  323  * Frees an item back to a zone without supplying an argument
  324  *
  325  * This is just a wrapper for uma_zfree_arg for convenience.
  326  *
  327  */
  328 static __inline void uma_zfree(uma_zone_t zone, void *item);
  329 
  330 static __inline void
  331 uma_zfree(uma_zone_t zone, void *item)
  332 {
  333         uma_zfree_arg(zone, item, NULL);
  334 }
  335 
  336 /*
  337  * XXX The rest of the prototypes in this header are h0h0 magic for the VM.
  338  * If you think you need to use it for a normal zone you're probably incorrect.
  339  */
  340 
  341 /*
  342  * Backend page supplier routines
  343  *
  344  * Arguments:
  345  *      zone  The zone that is requesting pages.
  346  *      size  The number of bytes being requested.
  347  *      pflag Flags for these memory pages, see below.
  348  *      wait  Indicates our willingness to block.
  349  *
  350  * Returns:
  351  *      A pointer to the allocated memory or NULL on failure.
  352  */
  353 
  354 typedef void *(*uma_alloc)(uma_zone_t zone, int size, u_int8_t *pflag, int wait);
  355 
  356 /*
  357  * Backend page free routines
  358  *
  359  * Arguments:
  360  *      item  A pointer to the previously allocated pages.
  361  *      size  The original size of the allocation.
  362  *      pflag The flags for the slab.  See UMA_SLAB_* below.
  363  *
  364  * Returns:
  365  *      None
  366  */
  367 typedef void (*uma_free)(void *item, int size, u_int8_t pflag);
  368 
  369 
  370 
  371 /*
  372  * Sets up the uma allocator. (Called by vm_mem_init)
  373  *
  374  * Arguments:
  375  *      bootmem  A pointer to memory used to bootstrap the system.
  376  *
  377  * Returns:
  378  *      Nothing
  379  *
  380  * Discussion:
  381  *      This memory is used for zones which allocate things before the
  382  *      backend page supplier can give us pages.  It should be
  383  *      UMA_SLAB_SIZE * boot_pages bytes. (see uma_int.h)
  384  *
  385  */
  386 
  387 void uma_startup(void *bootmem, int boot_pages);
  388 
  389 /*
  390  * Finishes starting up the allocator.  This should
  391  * be called when kva is ready for normal allocs.
  392  *
  393  * Arguments:
  394  *      None
  395  *
  396  * Returns:
  397  *      Nothing
  398  *
  399  * Discussion:
  400  *      uma_startup2 is called by kmeminit() to enable us of uma for malloc.
  401  */
  402  
  403 void uma_startup2(void);
  404 
  405 /*
  406  * Reclaims unused memory for all zones
  407  *
  408  * Arguments:
  409  *      None
  410  * Returns:
  411  *      None
  412  *
  413  * This should only be called by the page out daemon.
  414  */
  415 
  416 void uma_reclaim(void);
  417 
  418 /*
  419  * Sets the alignment mask to be used for all zones requesting cache
  420  * alignment.  Should be called by MD boot code prior to starting VM/UMA.
  421  *
  422  * Arguments:
  423  *      align The alignment mask
  424  *
  425  * Returns:
  426  *      Nothing
  427  */
  428 void uma_set_align(int align);
  429 
  430 /*
  431  * Switches the backing object of a zone
  432  *
  433  * Arguments:
  434  *      zone  The zone to update.
  435  *      obj   The VM object to use for future allocations.
  436  *      size  The size of the object to allocate.
  437  *
  438  * Returns:
  439  *      0  if kva space can not be allocated
  440  *      1  if successful
  441  *
  442  * Discussion:
  443  *      A NULL object can be used and uma will allocate one for you.  Setting
  444  *      the size will limit the amount of memory allocated to this zone.
  445  *
  446  */
  447 struct vm_object;
  448 int uma_zone_set_obj(uma_zone_t zone, struct vm_object *obj, int size);
  449 
  450 /*
  451  * Sets a high limit on the number of items allowed in a zone
  452  *
  453  * Arguments:
  454  *      zone  The zone to limit
  455  *
  456  * Returns:
  457  *      Nothing
  458  */
  459 void uma_zone_set_max(uma_zone_t zone, int nitems);
  460 
  461 /*
  462  * The following two routines (uma_zone_set_init/fini)
  463  * are used to set the backend init/fini pair which acts on an
  464  * object as it becomes allocated and is placed in a slab within
  465  * the specified zone's backing keg.  These should probably not
  466  * be changed once allocations have already begun, but only be set
  467  * immediately upon zone creation.
  468  */
  469 void uma_zone_set_init(uma_zone_t zone, uma_init uminit);
  470 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini);
  471 
  472 /*
  473  * The following two routines (uma_zone_set_zinit/zfini) are
  474  * used to set the zinit/zfini pair which acts on an object as
  475  * it passes from the backing Keg's slab cache to the
  476  * specified Zone's bucket cache.  These should probably not
  477  * be changed once allocations have already begun, but only be set
  478  * immediately upon zone creation.
  479  */
  480 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit);
  481 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini);
  482 
  483 /*
  484  * Replaces the standard page_alloc or obj_alloc functions for this zone
  485  *
  486  * Arguments:
  487  *      zone   The zone whose backend allocator is being changed.
  488  *      allocf A pointer to the allocation function
  489  *
  490  * Returns:
  491  *      Nothing
  492  *
  493  * Discussion:
  494  *      This could be used to implement pageable allocation, or perhaps
  495  *      even DMA allocators if used in conjunction with the OFFPAGE
  496  *      zone flag.
  497  */
  498 
  499 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf);
  500 
  501 /*
  502  * Used for freeing memory provided by the allocf above
  503  *
  504  * Arguments:
  505  *      zone  The zone that intends to use this free routine.
  506  *      freef The page freeing routine.
  507  *
  508  * Returns:
  509  *      Nothing
  510  */
  511 
  512 void uma_zone_set_freef(uma_zone_t zone, uma_free freef);
  513 
  514 /*
  515  * These flags are setable in the allocf and visible in the freef.
  516  */
  517 #define UMA_SLAB_BOOT   0x01            /* Slab alloced from boot pages */
  518 #define UMA_SLAB_KMEM   0x02            /* Slab alloced from kmem_map */
  519 #define UMA_SLAB_KERNEL 0x04            /* Slab alloced from kernel_map */
  520 #define UMA_SLAB_PRIV   0x08            /* Slab alloced from priv allocator */
  521 #define UMA_SLAB_OFFP   0x10            /* Slab is managed separately  */
  522 #define UMA_SLAB_MALLOC 0x20            /* Slab is a large malloc slab */
  523 /* 0x40 and 0x80 are available */
  524 
  525 /*
  526  * Used to pre-fill a zone with some number of items
  527  *
  528  * Arguments:
  529  *      zone    The zone to fill
  530  *      itemcnt The number of items to reserve
  531  *
  532  * Returns:
  533  *      Nothing
  534  *
  535  * NOTE: This is blocking and should only be done at startup
  536  */
  537 void uma_prealloc(uma_zone_t zone, int itemcnt);
  538 
  539 /*
  540  * Used to lookup the reference counter allocated for an item
  541  * from a UMA_ZONE_REFCNT zone.  For UMA_ZONE_REFCNT zones,
  542  * reference counters are allocated for items and stored in
  543  * the underlying slab header.
  544  *
  545  * Arguments:
  546  *      zone  The UMA_ZONE_REFCNT zone to which the item belongs.
  547  *      item  The address of the item for which we want a refcnt.
  548  *
  549  * Returns:
  550  *      A pointer to a u_int32_t reference counter.
  551  */
  552 u_int32_t *uma_find_refcnt(uma_zone_t zone, void *item);
  553 
  554 /*
  555  * Used to determine if a fixed-size zone is exhausted.
  556  *
  557  * Arguments:
  558  *      zone    The zone to check
  559  *
  560  * Returns:
  561  *      Non-zero if zone is exhausted.
  562  */
  563 int uma_zone_exhausted(uma_zone_t zone);
  564 int uma_zone_exhausted_nolock(uma_zone_t zone);
  565 
  566 /*
  567  * Exported statistics structures to be used by user space monitoring tools.
  568  * Statistics stream consists of a uma_stream_header, followed by a series of
  569  * alternative uma_type_header and uma_type_stat structures.
  570  */
  571 #define UMA_STREAM_VERSION      0x00000001
  572 struct uma_stream_header {
  573         u_int32_t       ush_version;    /* Stream format version. */
  574         u_int32_t       ush_maxcpus;    /* Value of MAXCPU for stream. */
  575         u_int32_t       ush_count;      /* Number of records. */
  576         u_int32_t       _ush_pad;       /* Pad/reserved field. */
  577 };
  578 
  579 #define UTH_MAX_NAME    32
  580 #define UTH_ZONE_SECONDARY      0x00000001
  581 struct uma_type_header {
  582         /*
  583          * Static per-zone data, some extracted from the supporting keg.
  584          */
  585         char            uth_name[UTH_MAX_NAME];
  586         u_int32_t       uth_align;      /* Keg: alignment. */
  587         u_int32_t       uth_size;       /* Keg: requested size of item. */
  588         u_int32_t       uth_rsize;      /* Keg: real size of item. */
  589         u_int32_t       uth_maxpages;   /* Keg: maximum number of pages. */
  590         u_int32_t       uth_limit;      /* Keg: max items to allocate. */
  591 
  592         /*
  593          * Current dynamic zone/keg-derived statistics.
  594          */
  595         u_int32_t       uth_pages;      /* Keg: pages allocated. */
  596         u_int32_t       uth_keg_free;   /* Keg: items free. */
  597         u_int32_t       uth_zone_free;  /* Zone: items free. */
  598         u_int32_t       uth_bucketsize; /* Zone: desired bucket size. */
  599         u_int32_t       uth_zone_flags; /* Zone: flags. */
  600         u_int64_t       uth_allocs;     /* Zone: number of allocations. */
  601         u_int64_t       uth_frees;      /* Zone: number of frees. */
  602         u_int64_t       uth_fails;      /* Zone: number of alloc failures. */
  603         u_int64_t       _uth_reserved1[3];      /* Reserved. */
  604 };
  605 
  606 struct uma_percpu_stat {
  607         u_int64_t       ups_allocs;     /* Cache: number of allocations. */
  608         u_int64_t       ups_frees;      /* Cache: number of frees. */
  609         u_int64_t       ups_cache_free; /* Cache: free items in cache. */
  610         u_int64_t       _ups_reserved[5];       /* Reserved. */
  611 };
  612 
  613 #endif

Cache object: b46540d7e7d0e1ef807f954183fa796b


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