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      1 /*	$NetBSD: syscall_stats.h,v 1.4 2008/11/12 12:36:28 ad 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 #ifdef _KERNEL_OPT
     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_ */
    148