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[lib/memory] Add mallinfo support
2006-02-15 Paul Jakma <paul.jakma@sun.com> * configure.ac: Check for mallinfo, being careful to link test so we can detect things like umem being used (which doesn't provide a mallinfo). * lib/memory.c: (mtype_memstr) new helper function to return human friendly string for a byte count. (mtype_stats_alloc) new function, for users to retrieve number of objects allocated. (show_memory_mallinfo) New function, show mallinfo statistics if available. (show_memory_all_cmd) Call show_memory_mallinfo, if mallinfo is available. * lib/memory.h: Export mtype_memstr and mtype_stats_alloc. Provide a define for a reasonable buffer size for mtype_memstr.
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Paul Jakma
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41be32bfe6
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@ -1,3 +1,9 @@
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2006-02-15 Paul Jakma <paul.jakma@sun.com>
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* configure.ac: Check for mallinfo, being careful to link test
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so we can detect things like umem being used (which doesn't
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provide a mallinfo).
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2006-01-31 Paul Jakma <paul.jakma@sun.com>
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* configure.ac: Cleanup the hideous {net,ucd}-snmp section
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20
configure.ac
20
configure.ac
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@ -5,7 +5,7 @@
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## Copyright (c) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
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## Portions Copyright (c) 2003 Paul Jakma <paul@dishone.st>
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##
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## $Id: configure.ac,v 1.118 2006/01/31 10:09:27 paul Exp $
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## $Id: configure.ac,v 1.119 2006/03/30 13:53:59 paul Exp $
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AC_PREREQ(2.53)
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AC_INIT(Quagga, 0.99.3, [http://bugzilla.quagga.net])
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@ -1236,6 +1236,24 @@ if test x"${ac_cv_header_execinfo_h}" = x"yes"; then
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)
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fi
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dnl -----------------------------------------
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dnl check for malloc mallinfo struct and call
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dnl this must try and link using LIBS, in
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dnl order to check no alternative allocator
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dnl has been specified, which might not provide
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dnl mallinfo, e.g. such as Umem on Solaris.
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dnl -----------------------------------------
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AC_CHECK_HEADERS(malloc.h,
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[AC_MSG_CHECKING(whether mallinfo is available)
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <malloc.h>]],
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[[struct mallinfo ac_x; ac_x = mallinfo ();]])],
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[AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_MALLINFO,,mallinfo)],
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AC_MSG_RESULT(no)
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)
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]
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)
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dnl ----------
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dnl configure date
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dnl ----------
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@ -1,3 +1,17 @@
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2006-03-15 Paul Jakma <paul.jakma@sun.com>
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* memory.c: (mtype_memstr) new helper function to
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return human friendly string for a byte count.
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(mtype_stats_alloc) new function, for users to retrieve
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number of objects allocated.
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(show_memory_mallinfo) New function, show mallinfo statistics
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if available.
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(show_memory_all_cmd) Call show_memory_mallinfo, if mallinfo
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is available.
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* memory.h: Export mtype_memstr and mtype_stats_alloc.
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Provide a define for a reasonable buffer size for
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mtype_memstr.
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2006-03-14 Paul Jakma <paul.jakma@sun.com>
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* privs.c: (zprivs_caps_init) Change user IDs before lowering
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117
lib/memory.c
117
lib/memory.c
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@ -21,6 +21,7 @@
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*/
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#include <zebra.h>
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#include <malloc.h>
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#include "log.h"
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#include "memory.h"
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@ -278,6 +279,47 @@ show_memory_vty (struct vty *vty, struct memory_list *list)
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return needsep;
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}
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#ifdef HAVE_MALLINFO
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static int
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show_memory_mallinfo (struct vty *vty)
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{
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struct mallinfo minfo = mallinfo();
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char buf[MTYPE_MEMSTR_LEN];
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vty_out (vty, "System allocator statistics:%s", VTY_NEWLINE);
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vty_out (vty, " Total heap allocated: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.arena),
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VTY_NEWLINE);
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vty_out (vty, " Holding block headers: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.hblkhd),
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VTY_NEWLINE);
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vty_out (vty, " Used small blocks: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.usmblks),
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VTY_NEWLINE);
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vty_out (vty, " Used ordinary blocks: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.uordblks),
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VTY_NEWLINE);
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vty_out (vty, " Free small blocks: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.fsmblks),
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VTY_NEWLINE);
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vty_out (vty, " Free ordinary blocks: %s%s",
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mtype_memstr (buf, MTYPE_MEMSTR_LEN, minfo.fordblks),
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VTY_NEWLINE);
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vty_out (vty, " Ordinary blocks: %ld%s",
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(unsigned long)minfo.ordblks,
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VTY_NEWLINE);
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vty_out (vty, " Small blocks: %ld%s",
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(unsigned long)minfo.smblks,
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VTY_NEWLINE);
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vty_out (vty, " Holding blocks: %ld%s",
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(unsigned long)minfo.hblks,
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VTY_NEWLINE);
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vty_out (vty, "(see system documentation for 'mallinfo' for meaning)%s",
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VTY_NEWLINE);
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return 1;
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}
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#endif /* HAVE_MALLINFO */
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DEFUN (show_memory_all,
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show_memory_all_cmd,
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"show memory all",
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@ -287,7 +329,11 @@ DEFUN (show_memory_all,
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{
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struct mlist *ml;
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int needsep = 0;
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#ifdef HAVE_MALLINFO
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needsep = show_memory_mallinfo (vty);
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#endif /* HAVE_MALLINFO */
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for (ml = mlists; ml->list; ml++)
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{
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if (needsep)
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@ -416,3 +462,72 @@ memory_init (void)
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install_element (ENABLE_NODE, &show_memory_ospf6_cmd);
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install_element (ENABLE_NODE, &show_memory_isis_cmd);
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}
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/* Stats querying from users */
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/* Return a pointer to a human friendly string describing
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* the byte count passed in. E.g:
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* "0 bytes", "2048 bytes", "110kB", "500MiB", "11GiB", etc.
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* Up to 4 significant figures will be given.
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* The pointer returned may be NULL (indicating an error)
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* or point to the given buffer, or point to static storage.
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*/
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const char *
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mtype_memstr (char *buf, size_t len, unsigned long bytes)
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{
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unsigned int t, g, m, k;
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/* easy cases */
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if (!bytes)
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return "0 bytes";
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if (bytes == 1)
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return "1 byte";
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if (sizeof (unsigned long) >= 8)
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/* Hacked to make it not warn on ILP32 machines
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* Shift will always be 40 at runtime. See below too */
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t = bytes >> (sizeof (unsigned long) >= 8 ? 40 : 0);
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else
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t = 0;
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g = bytes >> 30;
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m = bytes >> 20;
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k = bytes >> 10;
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if (t > 10)
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{
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/* The shift will always be 39 at runtime.
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* Just hacked to make it not warn on 'smaller' machines.
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* Static compiler analysis should mean no extra code
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*/
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if (bytes & (1 << (sizeof (unsigned long) >= 8 ? 39 : 0)))
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t++;
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snprintf (buf, len, "%4d TiB", t);
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}
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else if (g > 10)
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{
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if (bytes & (1 << 29))
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g++;
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snprintf (buf, len, "%d GiB", g);
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}
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else if (m > 10)
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{
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if (bytes & (1 << 19))
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m++;
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snprintf (buf, len, "%d MiB", m);
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}
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else if (k > 10)
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{
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if (bytes & (1 << 9))
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k++;
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snprintf (buf, len, "%d KiB", k);
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}
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else
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snprintf (buf, len, "%ld bytes", bytes);
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return buf;
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}
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unsigned long
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mtype_stats_alloc (int type)
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{
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return mstat[type].alloc;
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}
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@ -79,4 +79,10 @@ extern char *mtype_zstrdup (const char *file, int line, int type,
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const char *str);
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extern void memory_init (void);
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/* return number of allocations outstanding for the type */
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extern unsigned long mtype_stats_alloc (int);
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/* Human friendly string for given byte count */
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#define MTYPE_MEMSTR_LEN 20
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extern const char *mtype_memstr (char *, size_t, unsigned long);
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#endif /* _ZEBRA_MEMORY_H */
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