5b699f1614
They follow the conventions set by rw and sx lock probes. There is an additional lockstat:::lockmgr-disown probe. Update lockstat(1) to report on contention and hold events for lockmgr locks. Document the new probes in dtrace_lockstat.4, and deduplicate some of the existing probe descriptions. Reviewed by: mjg MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D21355
93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright 2008-2009 Stacey Son <sson@FreeBSD.org>
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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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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/lockstat.h>
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#include <sys/sdt.h>
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#include <sys/time.h>
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SDT_PROVIDER_DEFINE(lockstat);
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SDT_PROBE_DEFINE1(lockstat, , , adaptive__acquire, "struct mtx *");
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SDT_PROBE_DEFINE1(lockstat, , , adaptive__release, "struct mtx *");
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SDT_PROBE_DEFINE2(lockstat, , , adaptive__spin, "struct mtx *", "uint64_t");
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SDT_PROBE_DEFINE2(lockstat, , , adaptive__block, "struct mtx *", "uint64_t");
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SDT_PROBE_DEFINE1(lockstat, , , spin__acquire, "struct mtx *");
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SDT_PROBE_DEFINE1(lockstat, , , spin__release, "struct mtx *");
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SDT_PROBE_DEFINE2(lockstat, , , spin__spin, "struct mtx *", "uint64_t");
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SDT_PROBE_DEFINE2(lockstat, , , rw__acquire, "struct rwlock *", "int");
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SDT_PROBE_DEFINE2(lockstat, , , rw__release, "struct rwlock *", "int");
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SDT_PROBE_DEFINE5(lockstat, , , rw__block, "struct rwlock *", "uint64_t", "int",
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"int", "int");
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SDT_PROBE_DEFINE2(lockstat, , , rw__spin, "struct rwlock *", "uint64_t");
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SDT_PROBE_DEFINE1(lockstat, , , rw__upgrade, "struct rwlock *");
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SDT_PROBE_DEFINE1(lockstat, , , rw__downgrade, "struct rwlock *");
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SDT_PROBE_DEFINE2(lockstat, , , sx__acquire, "struct sx *", "int");
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SDT_PROBE_DEFINE2(lockstat, , , sx__release, "struct sx *", "int");
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SDT_PROBE_DEFINE5(lockstat, , , sx__block, "struct sx *", "uint64_t", "int",
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"int", "int");
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SDT_PROBE_DEFINE2(lockstat, , , sx__spin, "struct sx *", "uint64_t");
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SDT_PROBE_DEFINE1(lockstat, , , sx__upgrade, "struct sx *");
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SDT_PROBE_DEFINE1(lockstat, , , sx__downgrade, "struct sx *");
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SDT_PROBE_DEFINE2(lockstat, , , lockmgr__acquire, "struct lock *", "int");
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SDT_PROBE_DEFINE2(lockstat, , , lockmgr__release, "struct lock *", "int");
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SDT_PROBE_DEFINE2(lockstat, , , lockmgr__disown, "struct lock *", "int");
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SDT_PROBE_DEFINE5(lockstat, , , lockmgr__block, "struct lock *", "uint64_t",
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"int", "int", "int");
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SDT_PROBE_DEFINE1(lockstat, , , lockmgr__upgrade, "struct lock *");
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SDT_PROBE_DEFINE1(lockstat, , , lockmgr__downgrade, "struct lock *");
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SDT_PROBE_DEFINE2(lockstat, , , thread__spin, "struct mtx *", "uint64_t");
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volatile bool __read_frequently lockstat_enabled;
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uint64_t
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lockstat_nsecs(struct lock_object *lo)
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{
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struct bintime bt;
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uint64_t ns;
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if (!lockstat_enabled)
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return (0);
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if ((lo->lo_flags & LO_NOPROFILE) != 0)
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return (0);
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binuptime(&bt);
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ns = bt.sec * (uint64_t)1000000000;
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ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32;
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return (ns);
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}
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