Merge from projects/counters: counter(9).
Introduce counter(9) API, that implements fast and raceless counters, provided (but not limited to) for gathering of statistical data. See http://lists.freebsd.org/pipermail/freebsd-arch/2013-April/014204.html for more details. In collaboration with: kib Reviewed by: luigi Tested by: ae, ray Sponsored by: Nginx, Inc.
This commit is contained in:
parent
22e71d1cc4
commit
4e76af6a41
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=249268
@ -51,6 +51,7 @@ MAN= accept_filter.9 \
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config_intrhook.9 \
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config_intrhook.9 \
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contigmalloc.9 \
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contigmalloc.9 \
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copy.9 \
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copy.9 \
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counter.9 \
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cr_cansee.9 \
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cr_cansee.9 \
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critical_enter.9 \
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critical_enter.9 \
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cr_seeothergids.9 \
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cr_seeothergids.9 \
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@ -569,6 +570,14 @@ MLINKS+=copy.9 copyin.9 \
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copy.9 copyout.9 \
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copy.9 copyout.9 \
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copy.9 copyout_nofault.9 \
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copy.9 copyout_nofault.9 \
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copy.9 copystr.9
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copy.9 copystr.9
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MLINKS+=counter.9 counter_u64_alloc.9 \
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counter.9 counter_u64_free.9 \
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counter.9 counter_u64_add.9 \
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counter.9 counter_enter.9 \
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counter.9 counter_exit.9 \
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counter.9 counter_u64_add_protected.9 \
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counter.9 counter_u64_fetch.9 \
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counter.9 counter_u64_zero.9
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MLINKS+=critical_enter.9 critical.9 \
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MLINKS+=critical_enter.9 critical.9 \
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critical_enter.9 critical_exit.9
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critical_enter.9 critical_exit.9
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MLINKS+=crypto.9 crypto_dispatch.9 \
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MLINKS+=crypto.9 crypto_dispatch.9 \
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200
share/man/man9/counter.9
Normal file
200
share/man/man9/counter.9
Normal file
@ -0,0 +1,200 @@
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.\"-
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.\" Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org>
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.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE 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 THE 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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.\" $FreeBSD$
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.\"
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.Dd April 3, 2013
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.Dt COUNTER 9
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.Os
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.Sh NAME
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.Nm counter
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.Nd "SMP-friendly kernel counter implementation"
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/counter.h
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.Ft counter_u64_t
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.Fn counter_u64_alloc "int wait"
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.Ft void
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.Fn counter_u64_free "counter_u64_t c"
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.Ft void
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.Fn counter_u64_add "counter_u64_t c" "int64_t v"
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.Ft void
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.Fn counter_enter
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.Ft void
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.Fn counter_exit
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.Ft void
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.Fn counter_u64_add_protected "counter_u64_t c" "int64_t v"
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.Ft uint64_t
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.Fn counter_u64_fetch "counter_u64_t c"
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.Ft void
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.Fn counter_u64_zero "counter_u64_t c"
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.In sys/sysctl.h
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.Fn SYSCTL_COUNTER_U64 parent nbr name access ptr val descr
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.Fn SYSCTL_ADD_COUNTER_U64 ctx parent nbr name access ptr descr
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.Sh DESCRIPTION
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.Nm
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is a generic facility to create counters
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that can be utilized for any purpose (such as collecting statistical
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data).
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A
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.Nm
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is guaranteed to be lossless when several kernel threads do simultaneous
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updates.
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However,
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.Nm
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does not block the calling thread,
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also no
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.Xr atomic 9
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operations are used for the update, therefore the counters
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can be used in any non-interrupt context.
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Moreover,
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.Nm
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has special optimisations for SMP environments, making
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.Nm
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update faster than simple arithmetic on the global variable.
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Thus
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.Nm
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is considered suitable for accounting in the performance-critical
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code pathes.
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.Bl -tag -width indent
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.It Fn counter_u64_alloc how
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Allocate a new 64-bit unsigned counter.
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The
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.Fa wait
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argument is the
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.Xr malloc 9
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wait flag, should be either
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.Va M_NOWAIT
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or
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.Va M_WAITOK .
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If
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.Va M_WAITOK
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is specified the operation may fail.
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.It Fn counter_u64_free c
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Free the previously allocated counter
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.Fa c .
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.It Fn counter_u64_add c v
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Add
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.Fa v
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to
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.Fa c .
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The KPI does not guarantee any protection from wraparound.
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.It Fn counter_enter
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Enter mode that would allow to safely update several counters via
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.Fn counter_u64_add_protected .
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On some machines this expands to
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.Xr critical 9
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section, while on other is a nop.
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See
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.Sx IMPLEMENTATION DETAILS .
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.It Fn counter_exit
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Exit mode for updating several counters.
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.It Fn counter_u64_add_protected c v
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Same as
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.Fn counter_u64_add ,
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but should be preceded by
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.Fn counter_enter .
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.It Fn counter_u64_fetch c
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Take a snapshot of counter
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.Fa c .
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The data obtained is not guaranteed to reflect the real cumulative
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value for any moment.
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.It Fn counter_u64_zero c
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Clear the counter
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.Fa c
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and set it to zero.
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.It Fn SYSCTL_COUNTER_U64 parent nbr name access ptr val descr
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Declare a static
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.Xr sysctl
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oid that would represent a
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.Nm .
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The
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.Fa ptr
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argument should be a pointer to allocated
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.Vt counter_u64_t .
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A read of the oid returns value obtained through
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.Fn counter_u64_fetch .
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Any write to the oid zeroes it.
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.It Fn SYSCTL_ADD_COUNTER_U64 ctx parent nbr name access ptr descr
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Create a
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.Xr sysctl
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oid that would represent a
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.Nm .
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The
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.Fa ptr
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argument should be a pointer to allocated
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.Vt counter_u64_t .
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A read of the oid returns value obtained through
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.Fn counter_u64_fetch .
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Any write to the oid zeroes it.
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.El
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.Sh IMPLEMENTATION DETAILS
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On all architectures
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.Nm
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is implemented using per-CPU data fields that are specially aligned
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in memory, to avoid inter-CPU bus traffic due to shared use
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of the variables between CPUs.
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These are allocated using
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.Va UMA_ZONE_PCPU
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.Xr uma 9
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zone.
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The update operation only touches the field that is private to current CPU.
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Fetch operation loops through all per-CPU fields and obtains a snapshot
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sum of all fields.
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.Pp
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On amd64 a
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.Nm counter
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update is implemented as a single instruction without lock semantics,
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operating on the private data for the current CPU,
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which is safe against preemption and interrupts.
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.Pp
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On i386 architecture, when machine supports the cmpxchg8 instruction,
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this instruction is used.
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The multi-instruction sequence provides the same guarantees as the
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amd64 single-instruction implementation.
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.Pp
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On some architectures updating a counter require a
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.Xr critical 9
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section.
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.Sh SEE ALSO
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.Xr atomic 9 ,
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.Xr critical 9 ,
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.Xr locking 9 ,
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.Xr malloc 9 ,
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.Xr sysctl 9 ,
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.Xr uma 9
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.Sh HISTORY
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The
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.Nm
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facility first appeared in
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.Fx 10.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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facility was written by
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.An Gleb Smirnoff
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and
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.An Konstantin Belousov .
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51
sys/amd64/include/counter.h
Normal file
51
sys/amd64/include/counter.h
Normal file
@ -0,0 +1,51 @@
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/*-
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* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
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* 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.
|
||||||
|
* 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 THE 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 THE 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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* $FreeBSD$
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*/
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#ifndef __MACHINE_COUNTER_H__
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#define __MACHINE_COUNTER_H__
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#include <sys/pcpu.h>
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extern struct pcpu __pcpu[1];
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#define counter_enter() do {} while (0)
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#define counter_exit() do {} while (0)
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#define counter_u64_add_protected(c, i) counter_u64_add(c, i)
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static inline void
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counter_u64_add(counter_u64_t c, int64_t inc)
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|
{
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|
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__asm __volatile("addq\t%1,%%gs:(%0)"
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|
:
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|
: "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc)
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|
: "memory", "cc");
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|
}
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|
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#endif /* ! __MACHINE_COUNTER_H__ */
|
54
sys/arm/include/counter.h
Normal file
54
sys/arm/include/counter.h
Normal file
@ -0,0 +1,54 @@
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/*-
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|
* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
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|
* All rights reserved.
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|
*
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|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define counter_enter() critical_enter()
|
||||||
|
#define counter_exit() critical_exit()
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
counter_enter();
|
||||||
|
counter_u64_add_protected(c, inc);
|
||||||
|
counter_exit();
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
@ -2683,6 +2683,7 @@ kern/subr_bus.c standard
|
|||||||
kern/subr_bus_dma.c standard
|
kern/subr_bus_dma.c standard
|
||||||
kern/subr_bufring.c standard
|
kern/subr_bufring.c standard
|
||||||
kern/subr_clock.c standard
|
kern/subr_clock.c standard
|
||||||
|
kern/subr_counter.c standard
|
||||||
kern/subr_devstat.c standard
|
kern/subr_devstat.c standard
|
||||||
kern/subr_disk.c standard
|
kern/subr_disk.c standard
|
||||||
kern/subr_eventhandler.c standard
|
kern/subr_eventhandler.c standard
|
||||||
|
89
sys/i386/include/counter.h
Normal file
89
sys/i386/include/counter.h
Normal file
@ -0,0 +1,89 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
#include <machine/md_var.h>
|
||||||
|
#include <machine/specialreg.h>
|
||||||
|
|
||||||
|
#define counter_enter() do { \
|
||||||
|
if ((cpu_feature & CPUID_CX8) == 0) \
|
||||||
|
critical_enter(); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
#define counter_exit() do { \
|
||||||
|
if ((cpu_feature & CPUID_CX8) == 0) \
|
||||||
|
critical_exit(); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_64_inc_8b(uint64_t *p, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
__asm __volatile(
|
||||||
|
"movl %%fs:(%%esi),%%eax\n\t"
|
||||||
|
"movl %%fs:4(%%esi),%%edx\n"
|
||||||
|
"1:\n\t"
|
||||||
|
"movl %%eax,%%ebx\n\t"
|
||||||
|
"movl %%edx,%%ecx\n\t"
|
||||||
|
"addl (%%edi),%%ebx\n\t"
|
||||||
|
"adcl 4(%%edi),%%ecx\n\t"
|
||||||
|
"cmpxchg8b %%fs:(%%esi)\n\t"
|
||||||
|
"jnz 1b"
|
||||||
|
:
|
||||||
|
: "S" (p), "D" (&inc)
|
||||||
|
: "memory", "cc", "eax", "edx", "ebx", "ecx");
|
||||||
|
}
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
if ((cpu_feature & CPUID_CX8) == 0) { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} else \
|
||||||
|
counter_64_inc_8b((c), (inc)); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
if ((cpu_feature & CPUID_CX8) == 0) {
|
||||||
|
critical_enter();
|
||||||
|
*(uint64_t *)zpcpu_get(c) += inc;
|
||||||
|
critical_exit();
|
||||||
|
} else {
|
||||||
|
counter_64_inc_8b(c, inc);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
54
sys/ia64/include/counter.h
Normal file
54
sys/ia64/include/counter.h
Normal file
@ -0,0 +1,54 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define counter_enter() critical_enter()
|
||||||
|
#define counter_exit() critical_exit()
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
counter_enter();
|
||||||
|
counter_u64_add_protected(c, inc);
|
||||||
|
counter_exit();
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
109
sys/kern/subr_counter.c
Normal file
109
sys/kern/subr_counter.c
Normal file
@ -0,0 +1,109 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <sys/cdefs.h>
|
||||||
|
__FBSDID("$FreeBSD$");
|
||||||
|
|
||||||
|
#include <sys/param.h>
|
||||||
|
#include <sys/systm.h>
|
||||||
|
#include <sys/counter.h>
|
||||||
|
#include <sys/kernel.h>
|
||||||
|
#include <sys/smp.h>
|
||||||
|
#include <sys/sysctl.h>
|
||||||
|
#include <vm/uma.h>
|
||||||
|
|
||||||
|
static uma_zone_t uint64_pcpu_zone;
|
||||||
|
|
||||||
|
void
|
||||||
|
counter_u64_zero(counter_u64_t c)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < mp_ncpus; i++)
|
||||||
|
*(uint64_t *)((char *)c + sizeof(struct pcpu) * i) = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint64_t
|
||||||
|
counter_u64_fetch(counter_u64_t c)
|
||||||
|
{
|
||||||
|
uint64_t r;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
r = 0;
|
||||||
|
for (i = 0; i < mp_ncpus; i++)
|
||||||
|
r += *(uint64_t *)((char *)c + sizeof(struct pcpu) * i);
|
||||||
|
|
||||||
|
return (r);
|
||||||
|
}
|
||||||
|
|
||||||
|
counter_u64_t
|
||||||
|
counter_u64_alloc(int flags)
|
||||||
|
{
|
||||||
|
counter_u64_t r;
|
||||||
|
|
||||||
|
r = uma_zalloc(uint64_pcpu_zone, flags);
|
||||||
|
if (r != NULL)
|
||||||
|
counter_u64_zero(r);
|
||||||
|
|
||||||
|
return (r);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
counter_u64_free(counter_u64_t c)
|
||||||
|
{
|
||||||
|
|
||||||
|
uma_zfree(uint64_pcpu_zone, c);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS)
|
||||||
|
{
|
||||||
|
uint64_t out;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
out = counter_u64_fetch(*(counter_u64_t *)arg1);
|
||||||
|
|
||||||
|
error = SYSCTL_OUT(req, &out, sizeof(uint64_t));
|
||||||
|
|
||||||
|
if (error || !req->newptr)
|
||||||
|
return (error);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Any write attempt to a counter zeroes it.
|
||||||
|
*/
|
||||||
|
counter_u64_zero(*(counter_u64_t *)arg1);
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
counter_startup(void)
|
||||||
|
{
|
||||||
|
|
||||||
|
uint64_pcpu_zone = uma_zcreate("uint64 pcpu", sizeof(uint64_t),
|
||||||
|
NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_PCPU);
|
||||||
|
}
|
||||||
|
SYSINIT(counter, SI_SUB_KMEM, SI_ORDER_ANY, counter_startup, NULL);
|
54
sys/mips/include/counter.h
Normal file
54
sys/mips/include/counter.h
Normal file
@ -0,0 +1,54 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define counter_enter() critical_enter()
|
||||||
|
#define counter_exit() critical_exit()
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
counter_enter();
|
||||||
|
counter_u64_add_protected(c, inc);
|
||||||
|
counter_exit();
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
6
sys/pc98/include/counter.h
Normal file
6
sys/pc98/include/counter.h
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
/*-
|
||||||
|
* This file is in the public domain.
|
||||||
|
*/
|
||||||
|
/* $FreeBSD$ */
|
||||||
|
|
||||||
|
#include <i386/counter.h>
|
82
sys/powerpc/include/counter.h
Normal file
82
sys/powerpc/include/counter.h
Normal file
@ -0,0 +1,82 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012, 2013 Konstantin Belousov <kib@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined(AIM) && defined(__powerpc64__)
|
||||||
|
|
||||||
|
#define counter_enter() do {} while (0)
|
||||||
|
#define counter_exit() do {} while (0)
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, i) counter_u64_add(c, i)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
uint64_t ccpu, old;
|
||||||
|
|
||||||
|
__asm __volatile("\n"
|
||||||
|
"1:\n\t"
|
||||||
|
"mfsprg %0, 0\n\t"
|
||||||
|
"ldarx %1, %0, %2\n\t"
|
||||||
|
"add %1, %1, %3\n\t"
|
||||||
|
"stdcx. %1, %0, %2\n\t"
|
||||||
|
"bne- 1b"
|
||||||
|
: "=&b" (ccpu), "=&r" (old)
|
||||||
|
: "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc)
|
||||||
|
: "cc", "memory");
|
||||||
|
}
|
||||||
|
|
||||||
|
#else /* !AIM || !64bit */
|
||||||
|
|
||||||
|
#define counter_enter() critical_enter()
|
||||||
|
#define counter_exit() critical_exit()
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
counter_enter();
|
||||||
|
counter_u64_add_protected(c, inc);
|
||||||
|
counter_exit();
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* AIM 64bit */
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
54
sys/sparc64/include/counter.h
Normal file
54
sys/sparc64/include/counter.h
Normal file
@ -0,0 +1,54 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __MACHINE_COUNTER_H__
|
||||||
|
#define __MACHINE_COUNTER_H__
|
||||||
|
|
||||||
|
#include <sys/pcpu.h>
|
||||||
|
#ifdef INVARIANTS
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define counter_enter() critical_enter()
|
||||||
|
#define counter_exit() critical_exit()
|
||||||
|
|
||||||
|
#define counter_u64_add_protected(c, inc) do { \
|
||||||
|
CRITICAL_ASSERT(curthread); \
|
||||||
|
*(uint64_t *)zpcpu_get(c) += (inc); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
|
static inline void
|
||||||
|
counter_u64_add(counter_u64_t c, int64_t inc)
|
||||||
|
{
|
||||||
|
|
||||||
|
counter_enter();
|
||||||
|
counter_u64_add_protected(c, inc);
|
||||||
|
counter_exit();
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* ! __MACHINE_COUNTER_H__ */
|
42
sys/sys/counter.h
Normal file
42
sys/sys/counter.h
Normal file
@ -0,0 +1,42 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __SYS_COUNTER_H__
|
||||||
|
#define __SYS_COUNTER_H__
|
||||||
|
|
||||||
|
typedef uint64_t *counter_u64_t;
|
||||||
|
|
||||||
|
#include <machine/counter.h>
|
||||||
|
|
||||||
|
counter_u64_t counter_u64_alloc(int);
|
||||||
|
void counter_u64_free(counter_u64_t);
|
||||||
|
|
||||||
|
void counter_u64_zero(counter_u64_t);
|
||||||
|
uint64_t counter_u64_fetch(counter_u64_t);
|
||||||
|
|
||||||
|
#endif /* ! __SYS_COUNTER_H__ */
|
@ -184,6 +184,7 @@ int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
|
|||||||
int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
|
int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
|
||||||
int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
|
int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
|
||||||
int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
|
int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
|
||||||
|
int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
|
||||||
|
|
||||||
int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
|
int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
|
||||||
int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
|
int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
|
||||||
@ -379,6 +380,19 @@ SYSCTL_ALLOWED_TYPES(UINT64, uint64_t *a; unsigned long long *b; );
|
|||||||
SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \
|
SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \
|
||||||
sysctl_handle_64, "QU", __DESCR(descr))
|
sysctl_handle_64, "QU", __DESCR(descr))
|
||||||
|
|
||||||
|
/* Oid for a 64-bin unsigned counter(9). The pointer must be non NULL. */
|
||||||
|
#define SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, val, descr) \
|
||||||
|
SYSCTL_ASSERT_TYPE(UINT64, ptr, parent, name); \
|
||||||
|
SYSCTL_OID(parent, nbr, name, \
|
||||||
|
CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
|
||||||
|
ptr, val, sysctl_handle_counter_u64, "QU", descr)
|
||||||
|
|
||||||
|
#define SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr)\
|
||||||
|
sysctl_add_oid(ctx, parent, nbr, name, \
|
||||||
|
CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
|
||||||
|
SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \
|
||||||
|
sysctl_handle_counter_u64, "QU", __DESCR(descr))
|
||||||
|
|
||||||
/* Oid for an opaque object. Specified by a pointer and a length. */
|
/* Oid for an opaque object. Specified by a pointer and a length. */
|
||||||
#define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
|
#define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
|
||||||
SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
|
SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
|
||||||
|
Loading…
Reference in New Issue
Block a user