/* $NetBSD: kernhist.h,v 1.7 2013/02/19 22:54:03 skrll Exp $ */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * 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 ``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 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. * * from: NetBSD: uvm_stat.h,v 1.49 2011/04/23 18:14:13 rmind Exp * from: Id: uvm_stat.h,v 1.1.2.4 1998/02/07 01:16:56 chs Exp */ #ifndef _SYS_KERNHIST_H_ #define _SYS_KERNHIST_H_ #if defined(_KERNEL_OPT) #include "opt_kernhist.h" #endif #include #ifdef KERNHIST #include #endif /* * kernel history/tracing, was uvm_stat */ struct kern_history_ent { struct timeval tv; /* time stamp */ int cpunum; const char *fmt; /* printf format */ size_t fmtlen; /* length of printf format */ const char *fn; /* function name */ size_t fnlen; /* length of function name */ u_long call; /* function call number */ u_long v[4]; /* values */ }; struct kern_history { const char *name; /* name of this history */ size_t namelen; /* length of name, not including null */ LIST_ENTRY(kern_history) list; /* link on list of all histories */ unsigned int n; /* number of entries */ unsigned int f; /* next free one */ struct kern_history_ent *e; /* the allocated entries */ }; LIST_HEAD(kern_history_head, kern_history); /* * grovelling lists all at once. we currently do not allow more than * 32 histories to exist, as the way to dump a number of them at once * is by calling kern_hist() with a bitmask. * * XXX extend this to have a registration function? however, there * needs to be static ones as UVM requires this before almost anything * else is setup. */ /* this is used to set the size of some arrays */ #define MAXHISTS 32 /* and these are the bit values of each history */ #define KERNHIST_UVMMAPHIST 0x00000001 /* maphist */ #define KERNHIST_UVMPDHIST 0x00000002 /* pdhist */ #define KERNHIST_UVMUBCHIST 0x00000004 /* ubchist */ #define KERNHIST_UVMLOANHIST 0x00000008 /* loanhist */ #ifdef _KERNEL /* * macros to use the history/tracing code. note that KERNHIST_LOG * must take 4 arguments (even if they are ignored by the format). */ #ifndef KERNHIST #define KERNHIST_DECL(NAME) #define KERNHIST_DEFINE(NAME) #define KERNHIST_INIT(NAME,N) #define KERNHIST_INIT_STATIC(NAME,BUF) #define KERNHIST_LOG(NAME,FMT,A,B,C,D) #define KERNHIST_CALLARGS(NAME,FMT,A,B,C,D) #define KERNHIST_CALLED(NAME) #define KERNHIST_FUNC(FNAME) #define kernhist_dump(NAME) #else #include /* for "cold" variable */ #include #include extern struct kern_history_head kern_histories; #define KERNHIST_DECL(NAME) extern struct kern_history NAME #define KERNHIST_DEFINE(NAME) struct kern_history NAME #define KERNHIST_INIT(NAME,N) \ do { \ (NAME).name = __STRING(NAME); \ (NAME).namelen = strlen(__STRING(NAME)); \ (NAME).n = (N); \ (NAME).f = 0; \ (NAME).e = (struct kern_history_ent *) \ kmem_zalloc(sizeof(struct kern_history_ent) * (N), KM_SLEEP); \ LIST_INSERT_HEAD(&kern_histories, &(NAME), list); \ } while (/*CONSTCOND*/ 0) #define KERNHIST_INIT_STATIC(NAME,BUF) \ do { \ (NAME).name = __STRING(NAME); \ (NAME).namelen = strlen(__STRING(NAME)); \ (NAME).n = sizeof(BUF) / sizeof(struct kern_history_ent); \ (NAME).f = 0; \ (NAME).e = (struct kern_history_ent *) (BUF); \ memset((NAME).e, 0, sizeof(struct kern_history_ent) * (NAME).n); \ LIST_INSERT_HEAD(&kern_histories, &(NAME), list); \ } while (/*CONSTCOND*/ 0) #ifndef KERNHIST_DELAY #define KERNHIST_DELAY 100000 #endif #if defined(KERNHIST_PRINT) extern int kernhist_print_enabled; #define KERNHIST_PRINTNOW(E) \ do { \ if (kernhist_print_enabled) { \ kernhist_entry_print(E); \ if (KERNHIST_DELAY != 0) \ DELAY(KERNHIST_DELAY); \ } \ } while (/*CONSTCOND*/ 0) #else #define KERNHIST_PRINTNOW(E) /* nothing */ #endif #define KERNHIST_LOG(NAME,FMT,A,B,C,D) \ do { \ unsigned int _i_, _j_; \ do { \ _i_ = (NAME).f; \ _j_ = (_i_ + 1 < (NAME).n) ? _i_ + 1 : 0; \ } while (atomic_cas_uint(&(NAME).f, _i_, _j_) != _i_); \ struct kern_history_ent * const _e_ = &(NAME).e[_i_]; \ if (__predict_true(!cold)) \ microtime(&_e_->tv); \ _e_->cpunum = cpu_number(); \ _e_->fmt = (FMT); \ _e_->fmtlen = strlen(FMT); \ _e_->fn = _kernhist_name; \ _e_->fnlen = strlen(_kernhist_name); \ _e_->call = _kernhist_call; \ _e_->v[0] = (u_long)(A); \ _e_->v[1] = (u_long)(B); \ _e_->v[2] = (u_long)(C); \ _e_->v[3] = (u_long)(D); \ KERNHIST_PRINTNOW(_e_); \ } while (/*CONSTCOND*/ 0) #define KERNHIST_CALLED(NAME) \ do { \ _kernhist_call = atomic_inc_uint_nv(&_kernhist_cnt); \ KERNHIST_LOG(NAME, "called!", 0, 0, 0, 0); \ } while (/*CONSTCOND*/ 0) /* * This extends kernhist to avoid wasting a separate "called!" entry on every * function. */ #define KERNHIST_CALLARGS(NAME, FMT, A, B, C, D) \ do { \ _kernhist_call = atomic_inc_uint_nv(&_kernhist_cnt); \ KERNHIST_LOG(NAME, "called: "FMT, (A), (B), (C), (D)); \ } while (/*CONSTCOND*/ 0) #define KERNHIST_FUNC(FNAME) \ static unsigned int _kernhist_cnt = 0; \ static const char *const _kernhist_name = FNAME; \ unsigned int _kernhist_call = 0; static inline void kernhist_entry_print(const struct kern_history_ent *); static inline void kernhist_entry_print(const struct kern_history_ent *e) { printf("%06" PRIu64 ".%06d ", e->tv.tv_sec, e->tv.tv_usec); printf("%s#%ld@%d: ", e->fn, e->call, e->cpunum); printf(e->fmt, e->v[0], e->v[1], e->v[2], e->v[3]); printf("\n"); } #if defined(DDB) void kernhist_print(void (*)(const char *, ...) __printflike(1, 2)); #endif /* DDB */ #endif /* KERNHIST */ #endif /* _KERNEL */ #endif /* _SYS_KERNHIST_H_ */