Date: Thu, 3 Dec 2009 16:08:00 +0000 (UTC) From: Shteryana Shopova <syrinx@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r200063 - head/contrib/bsnmp/snmp_mibII Message-ID: <200912031608.nB3G80hm018936@svn.freebsd.org>
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Author: syrinx Date: Thu Dec 3 16:08:00 2009 New Revision: 200063 URL: http://svn.freebsd.org/changeset/base/200063 Log: Fix a problem with high CPU consumption (up to 30%) by bsnmpd on a loaded system. Instead of constantly calling the mibII_idle function when the server is not busy call the function only once every 10 seconds to avoid bsnmpd constantly doing gettimeofday syscalls. Make the idle polling interval confugurable via begemotIfDataPoll. Reported and tested by: misho (at) aitbg (dot) com Oked by: harti MFC after: 1 week Modified: head/contrib/bsnmp/snmp_mibII/BEGEMOT-MIB2-MIB.txt head/contrib/bsnmp/snmp_mibII/mibII.c head/contrib/bsnmp/snmp_mibII/mibII.h head/contrib/bsnmp/snmp_mibII/mibII_begemot.c head/contrib/bsnmp/snmp_mibII/mibII_tree.def Modified: head/contrib/bsnmp/snmp_mibII/BEGEMOT-MIB2-MIB.txt ============================================================================== --- head/contrib/bsnmp/snmp_mibII/BEGEMOT-MIB2-MIB.txt Thu Dec 3 15:48:24 2009 (r200062) +++ head/contrib/bsnmp/snmp_mibII/BEGEMOT-MIB2-MIB.txt Thu Dec 3 16:08:00 2009 (r200063) @@ -39,7 +39,7 @@ IMPORTS FROM BEGEMOT-IP-MIB; begemotMib2 MODULE-IDENTITY - LAST-UPDATED "200602130000Z" + LAST-UPDATED "200908030000Z" ORGANIZATION "German Aerospace Center" CONTACT-INFO " Hartmut Brandt @@ -54,6 +54,12 @@ begemotMib2 MODULE-IDENTITY E-mail: harti@freebsd.org" DESCRIPTION "The MIB for private mib2 stuff." + REVISION "200908030000Z" + DESCRIPTION + "Second edition adds begemotIfDataPoll object." + REVISION "200602130000Z" + DESCRIPTION + "Initial revision." ::= { begemotIp 1 } begemotIfMaxspeed OBJECT-TYPE @@ -87,4 +93,14 @@ begemotIfForcePoll OBJECT-TYPE bit rate in its MIB." ::= { begemotMib2 3 } +begemotIfDataPoll OBJECT-TYPE + SYNTAX TimeTicks + UNITS "deciseconds" + MAX-ACCESS read-write + STATUS current + DESCRIPTION + "The rate at which the mib2 module will poll interface data." + DEFVAL { 100 } + ::= { begemotMib2 4 } + END Modified: head/contrib/bsnmp/snmp_mibII/mibII.c ============================================================================== --- head/contrib/bsnmp/snmp_mibII/mibII.c Thu Dec 3 15:48:24 2009 (r200062) +++ head/contrib/bsnmp/snmp_mibII/mibII.c Thu Dec 3 16:08:00 2009 (r200063) @@ -117,6 +117,15 @@ u_int mibif_hc_update_interval; /* HC update timer handle */ static void *hc_update_timer; +/* Idle poll timer */ +static void *mibII_poll_timer; + +/* interfaces' data poll interval */ +u_int mibII_poll_ticks; + +/* Idle poll hook */ +static void mibII_idle(void *arg __unused); + /*****************************/ static const struct asn_oid oid_ifMIB = OIDX_ifMIB; @@ -410,6 +419,20 @@ mibif_reset_hc_timer(void) mibif_hc_update_interval = ticks; } +/** + * Restart the idle poll timer. + */ +void +mibif_restart_mibII_poll_timer(void) +{ + if (mibII_poll_timer != NULL) + timer_stop(mibII_poll_timer); + + if ((mibII_poll_timer = timer_start_repeat(mibII_poll_ticks * 10, + mibII_poll_ticks * 10, mibII_idle, NULL, module)) == NULL) + syslog(LOG_ERR, "timer_start(%u): %m", mibII_poll_ticks); +} + /* * Fetch new MIB data. */ @@ -1553,7 +1576,7 @@ get_cloners(void) * Idle function */ static void -mibII_idle(void) +mibII_idle(void *arg __unused) { struct mibifa *ifa; @@ -1608,6 +1631,10 @@ mibII_start(void) ipForward_reg = or_register(&oid_ipForward, "The MIB module for the display of CIDR multipath IP Routes.", module); + + mibII_poll_timer = NULL; + mibII_poll_ticks = MIBII_POLL_TICKS; + mibif_restart_mibII_poll_timer(); } /* @@ -1651,6 +1678,11 @@ mibII_init(struct lmodule *mod, int argc static int mibII_fini(void) { + if (mibII_poll_timer != NULL ) { + timer_stop(mibII_poll_timer); + mibII_poll_timer = NULL; + } + if (route_fd != NULL) fd_deselect(route_fd); if (route != -1) @@ -1690,7 +1722,7 @@ const struct snmp_module config = { "This module implements the interface and ip groups.", mibII_init, mibII_fini, - mibII_idle, /* idle */ + NULL, /* idle */ NULL, /* dump */ NULL, /* config */ mibII_start, Modified: head/contrib/bsnmp/snmp_mibII/mibII.h ============================================================================== --- head/contrib/bsnmp/snmp_mibII/mibII.h Thu Dec 3 15:48:24 2009 (r200062) +++ head/contrib/bsnmp/snmp_mibII/mibII.h Thu Dec 3 16:08:00 2009 (r200063) @@ -211,6 +211,14 @@ extern u_int mibif_hc_update_interval; /* re-compute update interval */ void mibif_reset_hc_timer(void); +/* interfaces' data poll interval */ +extern u_int mibII_poll_ticks; + +/* restart the data poll timer */ +void mibif_restart_mibII_poll_timer(void); + +#define MIBII_POLL_TICKS 100 + /* get interfaces and interface addresses. */ void mib_fetch_interfaces(void); Modified: head/contrib/bsnmp/snmp_mibII/mibII_begemot.c ============================================================================== --- head/contrib/bsnmp/snmp_mibII/mibII_begemot.c Thu Dec 3 15:48:24 2009 (r200062) +++ head/contrib/bsnmp/snmp_mibII/mibII_begemot.c Thu Dec 3 16:08:00 2009 (r200063) @@ -59,6 +59,11 @@ op_begemot_mibII(struct snmp_context *ct ctx->scratch->int1 = mibif_force_hc_update_interval; mibif_force_hc_update_interval = value->v.uint32; return (SNMP_ERR_NOERROR); + + case LEAF_begemotIfDataPoll: + ctx->scratch->int1 = mibII_poll_ticks; + mibII_poll_ticks = value->v.uint32; + return (SNMP_ERR_NOERROR); } abort(); @@ -68,6 +73,10 @@ op_begemot_mibII(struct snmp_context *ct case LEAF_begemotIfForcePoll: mibif_force_hc_update_interval = ctx->scratch->int1; return (SNMP_ERR_NOERROR); + + case LEAF_begemotIfDataPoll: + mibII_poll_ticks = ctx->scratch->int1; + return (SNMP_ERR_NOERROR); } abort(); @@ -78,6 +87,10 @@ op_begemot_mibII(struct snmp_context *ct mibif_force_hc_update_interval = ctx->scratch->int1; mibif_reset_hc_timer(); return (SNMP_ERR_NOERROR); + + case LEAF_begemotIfDataPoll: + mibif_restart_mibII_poll_timer(); + return (SNMP_ERR_NOERROR); } abort(); } @@ -98,6 +111,10 @@ op_begemot_mibII(struct snmp_context *ct case LEAF_begemotIfForcePoll: value->v.uint32 = mibif_force_hc_update_interval; return (SNMP_ERR_NOERROR); + + case LEAF_begemotIfDataPoll: + value->v.uint32 = mibII_poll_ticks; + return (SNMP_ERR_NOERROR); } abort(); } Modified: head/contrib/bsnmp/snmp_mibII/mibII_tree.def ============================================================================== --- head/contrib/bsnmp/snmp_mibII/mibII_tree.def Thu Dec 3 15:48:24 2009 (r200062) +++ head/contrib/bsnmp/snmp_mibII/mibII_tree.def Thu Dec 3 16:08:00 2009 (r200063) @@ -240,6 +240,7 @@ (1 begemotIfMaxspeed COUNTER64 op_begemot_mibII GET) (2 begemotIfPoll TIMETICKS op_begemot_mibII GET) (3 begemotIfForcePoll TIMETICKS op_begemot_mibII GET SET) + (4 begemotIfDataPoll TIMETICKS op_begemot_mibII GET SET) ) ) )
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