The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/syscall_stats.h

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    1 /*      $NetBSD: syscall_stats.h,v 1.3 2008/04/29 06:53:03 martin Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by David Laight.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _SYS_SYCALL_STAT_H_
   33 #define _SYS_SYCALL_STAT_H_
   34 
   35 #ifndef _LKM
   36 #include "opt_syscall_stats.h"
   37 #endif
   38 
   39 #ifdef SYSCALL_STATS
   40 #include <sys/syscall.h>
   41 
   42 extern uint64_t syscall_counts[SYS_NSYSENT];
   43 extern uint64_t syscall_count_user, syscall_count_system, syscall_count_interrupt;
   44 #define SYSCALL_COUNT(table, code) ((table)[code]++)
   45 
   46 #if defined(SYSCALL_TIMES) && defined(__HAVE_CPU_COUNTER)
   47 
   48 #include <machine/cpu_counter.h>
   49 extern uint64_t syscall_times[SYS_NSYSENT];
   50 
   51 #ifdef SYSCALL_TIMES_HASCOUNTER
   52 /* Force use of cycle counter - needed for Soekris systems */
   53 #define SYSCALL_TIME() (cpu_counter32())
   54 #else
   55 #define SYSCALL_TIME() (cpu_hascounter() ? cpu_counter32() : 0u)
   56 #endif
   57 
   58 #ifdef SYSCALL_TIMES_PROCTIMES
   59 #define SYSCALL_TIME_UPDATE_PROC(l, fld, delta) \
   60         (l)->l_proc->p_##fld##ticks += (delta)
   61 #else
   62 #define SYSCALL_TIME_UPDATE_PROC(l, fld, delta)
   63 #endif
   64 
   65 /* lwp creation */
   66 #define SYSCALL_TIME_LWP_INIT(l) do { \
   67     (l)->l_syscall_counter = &syscall_count_system; \
   68     SYSCALL_TIME_WAKEUP(l); \
   69 } while (0)
   70 
   71 /* System call entry hook */
   72 #define SYSCALL_TIME_SYS_ENTRY(l, table, code) do { \
   73         uint32_t now = SYSCALL_TIME(); \
   74         SYSCALL_TIME_UPDATE_PROC(l, u, elapsed = now - (l)->l_syscall_time); \
   75         (l)->l_syscall_counter = (table) + (code); \
   76         (l)->l_syscall_time = now; \
   77 } while (0)
   78 
   79 /* System call - process sleep */
   80 #define SYSCALL_TIME_SLEEP(l) do { \
   81         uint32_t now = SYSCALL_TIME(); \
   82         uint32_t elapsed = now - (l)->l_syscall_time; \
   83         (l)->l_syscall_time = now; \
   84         *(l)->l_syscall_counter += elapsed; \
   85         SYSCALL_TIME_UPDATE_PROC(l, s, elapsed); \
   86 } while (0)
   87 
   88 /* Process wakeup */
   89 #define SYSCALL_TIME_WAKEUP(l) \
   90         (l)->l_syscall_time = SYSCALL_TIME()
   91 
   92 /* System call exit */
   93 #define SYSCALL_TIME_SYS_EXIT(l) do { \
   94         uint32_t now = SYSCALL_TIME(); \
   95         uint32_t elapsed = now - (l)->l_syscall_time; \
   96         (l)->l_syscall_time = now; \
   97         *(l)->l_syscall_counter += elapsed; \
   98         (l)->l_syscall_counter = &syscall_count_user; \
   99         SYSCALL_TIME_UPDATE_PROC(l, s, elapsed); \
  100 } while (0)
  101 
  102 #ifdef _notyet
  103 /* Interrupt entry hook */
  104 #define SYSCALL_TIME_ISR_ENTRY(l, old) do { \
  105         uint32_t now = SYSCALL_TIME(); \
  106         uint32_t elapsed = now - (l)->l_syscall_time; \
  107         (l)->l_syscall_time = now; \
  108         old = (l)->l_syscall_counter; \
  109         if ((l)->l_syscall_counter != &syscall_count_interrupt) \
  110                 if ((l)->l_syscall_counter == &syscall_count_user) \
  111                         SYSCALL_TIME_UPDATE_PROC(l, u, elapsed); \
  112                 else { \
  113                         *(l)->l_syscall_counter += elapsed; \
  114                         SYSCALL_TIME_UPDATE_PROC(l, s, elapsed); \
  115                 } \
  116                 (l)->l_syscall_counter = &syscall_count_interrupt; \
  117         } \
  118 } while (0)
  119 
  120 /* Interrupt exit hook */
  121 #define SYSCALL_TIME_ISR_EXIT(l, saved) do { \
  122         uint32_t now = SYSCALL_TIME(); \
  123         SYSCALL_TIME_UPDATE_PROC(l, i, now - (l)->l_syscall_time); \
  124         (l)->l_syscall_time = now; \
  125         (l)->l_syscall_counter = saved; \
  126 } while (0)
  127 #endif
  128 
  129 #endif
  130 #endif
  131 
  132 #ifndef SYSCALL_TIME_SYS_ENTRY
  133 #define SYSCALL_TIME_LWP_INIT(l)
  134 #define SYSCALL_TIME_SYS_ENTRY(l,table,code)
  135 #define SYSCALL_TIME_SLEEP(l)
  136 #define SYSCALL_TIME_WAKEUP(l)
  137 #define SYSCALL_TIME_SYS_EXIT(l)
  138 #define SYSCALL_TIME_ISR_ENTRY(l,old)
  139 #define SYSCALL_TIME_ISR_EXIT(l,saved)
  140 #undef SYSCALL_TIMES
  141 #endif
  142 
  143 #ifndef SYSCALL_COUNT
  144 #define SYSCALL_COUNT(table, code)
  145 #endif
  146 
  147 #endif /* !_SYS_SYCALL_STAT_H_ */

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