08442f8a82
introduce a modified allocation mechanism for mbufs and mbuf clusters; one
which can scale under SMP and which offers the possibility of resource
reclamation to be implemented in the future. Notable advantages:
o Reduce contention for SMP by offering per-CPU pools and locks.
o Better use of data cache due to per-CPU pools.
o Much less code cache pollution due to excessively large allocation macros.
o Framework for `grouping' objects from same page together so as to be able
to possibly free wired-down pages back to the system if they are no longer
needed by the network stacks.
Additional things changed with this addition:
- Moved some mbuf specific declarations and initializations from
sys/conf/param.c into mbuf-specific code where they belong.
- m_getclr() has been renamed to m_get_clrd() because the old name is really
confusing. m_getclr() HAS been preserved though and is defined to the new
name. No tree sweep has been done "to change the interface," as the old
name will continue to be supported and is not depracated. The change was
merely done because m_getclr() sounds too much like "m_get a cluster."
- TEMPORARILY disabled mbtypes statistics displaying in netstat(1) and
systat(1) (see TODO below).
- Fixed systat(1) to display number of "free mbufs" based on new per-CPU
stat structures.
- Fixed netstat(1) to display new per-CPU stats based on sysctl-exported
per-CPU stat structures. All infos are fetched via sysctl.
TODO (in order of priority):
- Re-enable mbtypes statistics in both netstat(1) and systat(1) after
introducing an SMP friendly way to collect the mbtypes stats under the
already introduced per-CPU locks (i.e. hopefully don't use atomic() - it
seems too costly for a mere stat update, especially when other locks are
already present).
- Optionally have systat(1) display not only "total free mbufs" but also
"total free mbufs per CPU pool."
- Fix minor length-fetching issues in netstat(1) related to recently
re-enabled option to read mbuf stats from a core file.
- Move reference counters at least for mbuf clusters into an unused portion
of the cluster itself, to save space and need to allocate a counter.
- Look into introducing resource freeing possibly from a kproc.
Reviewed by (in parts): jlemon, jake, silby, terry
Tested by: jlemon (Intel & Alpha), mjacob (Intel & Alpha)
Preliminary performance measurements: jlemon (and me, obviously)
URL: http://people.freebsd.org/~bmilekic/mb_alloc/
151 lines
5.2 KiB
C
151 lines
5.2 KiB
C
/*
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* Copyright (c) 1992, 1993
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* Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)netstat.h 8.2 (Berkeley) 1/4/94
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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extern int Aflag; /* show addresses of protocol control block */
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extern int aflag; /* show all sockets (including servers) */
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extern int bflag; /* show i/f total bytes in/out */
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extern int dflag; /* show i/f dropped packets */
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extern int gflag; /* show group (multicast) routing or stats */
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extern int iflag; /* show interfaces */
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extern int lflag; /* show routing table with use and ref */
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extern int Lflag; /* show size of listen queues */
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extern int mflag; /* show memory stats */
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extern int numeric_addr; /* show addresses numerically */
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extern int numeric_port; /* show ports numerically */
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extern int rflag; /* show routing tables (or routing stats) */
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extern int sflag; /* show protocol statistics */
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extern int tflag; /* show i/f watchdog timers */
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extern int Wflag; /* wide display */
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extern int interval; /* repeat interval for i/f stats */
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extern char *interface; /* desired i/f for stats, or NULL for all i/fs */
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extern int unit; /* unit number for above */
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extern int af; /* address family */
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int kread (u_long addr, char *buf, int size);
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char *plural (int);
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char *plurales (int);
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void protopr (u_long, char *, int);
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void tcp_stats (u_long, char *, int);
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void udp_stats (u_long, char *, int);
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void ip_stats (u_long, char *, int);
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void icmp_stats (u_long, char *, int);
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void igmp_stats (u_long, char *, int);
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#ifdef IPSEC
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void ipsec_stats (u_long, char *, int);
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#endif
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#ifdef INET6
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void ip6_stats (u_long, char *, int);
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void ip6_ifstats (char *);
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void icmp6_stats (u_long, char *, int);
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void icmp6_ifstats (char *);
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void pim6_stats (u_long, char *, int);
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void rip6_stats (u_long, char *, int);
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void mroute6pr (u_long, u_long);
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void mrt6_stats (u_long);
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struct sockaddr_in6;
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struct in6_addr;
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char *routename6 (struct sockaddr_in6 *);
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char *netname6 (struct sockaddr_in6 *, struct in6_addr *);
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#endif /*INET6*/
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#ifdef IPSEC
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void pfkey_stats (u_long, char *, int);
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#endif
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void bdg_stats (u_long, char *, int);
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void mbpr (u_long, u_long, u_long, u_long, u_long, u_long,
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u_long, u_long, u_long);
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void hostpr (u_long, u_long);
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void impstats (u_long, u_long);
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void intpr (int, u_long, void (*)(char *));
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void pr_rthdr (int);
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void pr_family (int);
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void rt_stats (u_long);
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char *ipx_pnet (struct sockaddr *);
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char *ipx_phost (struct sockaddr *);
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char *ns_phost (struct sockaddr *);
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void upHex (char *);
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char *routename (u_long);
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char *netname (u_long, u_long);
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char *atalk_print (struct sockaddr *, int);
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char *atalk_print2 (struct sockaddr *, struct sockaddr *, int);
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char *ipx_print (struct sockaddr *);
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char *ns_print (struct sockaddr *);
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void routepr (u_long);
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void ipxprotopr (u_long, char *, int);
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void spx_stats (u_long, char *, int);
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void ipx_stats (u_long, char *, int);
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void ipxerr_stats (u_long, char *, int);
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void nsprotopr (u_long, char *, int);
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void spp_stats (u_long, char *, int);
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void idp_stats (u_long, char *, int);
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void nserr_stats (u_long, char *, int);
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void atalkprotopr (u_long, char *, int);
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void ddp_stats (u_long, char *, int);
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void netgraphprotopr (u_long, char *, int);
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void unixpr (void);
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void esis_stats (u_long, char *, int);
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void clnp_stats (u_long, char *, int);
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void cltp_stats (u_long, char *, int);
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void iso_protopr (u_long, char *, int);
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void iso_protopr1 (u_long, int);
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void tp_protopr (u_long, char *, int);
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void tp_inproto (u_long);
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void tp_stats (caddr_t, caddr_t);
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void mroutepr (u_long, u_long);
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void mrt_stats (u_long);
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