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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2003-2005, Joseph Koshy
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/6.1/sys/sys/pmckern.h 158179 2006-04-30 16:44:43Z cvs2svn $
   27  */
   28 
   29 /*
   30  * PMC interface used by the base kernel.
   31  */
   32 
   33 #ifndef _SYS_PMCKERN_H_
   34 #define _SYS_PMCKERN_H_
   35 
   36 #include <sys/param.h>
   37 #include <sys/kernel.h>
   38 #include <sys/lock.h>
   39 #include <sys/proc.h>
   40 #include <sys/sx.h>
   41 
   42 #define PMC_FN_PROCESS_EXEC             1
   43 #define PMC_FN_CSW_IN                   2
   44 #define PMC_FN_CSW_OUT                  3
   45 #define PMC_FN_DO_SAMPLES               4
   46 
   47 struct pmckern_procexec {
   48         int             pm_credentialschanged;
   49         uintptr_t       pm_entryaddr;
   50 };
   51 
   52 /* hook */
   53 extern int (*pmc_hook)(struct thread *_td, int _function, void *_arg);
   54 extern int (*pmc_intr)(int _cpu, uintptr_t _pc, int _usermode);
   55 
   56 /* SX lock protecting the hook */
   57 extern struct sx pmc_sx;
   58 
   59 /* Per-cpu flags indicating availability of sampling data */
   60 extern volatile cpumask_t pmc_cpumask;
   61 
   62 /* Count of system-wide sampling PMCs in existence */
   63 extern volatile int pmc_ss_count;
   64 
   65 /* kernel version number */
   66 extern const int pmc_kernel_version;
   67 
   68 /* Hook invocation; for use within the kernel */
   69 #define PMC_CALL_HOOK(t, cmd, arg)              \
   70 do {                                            \
   71         sx_slock(&pmc_sx);                      \
   72         if (pmc_hook != NULL)                   \
   73                 (pmc_hook)((t), (cmd), (arg));  \
   74         sx_sunlock(&pmc_sx);                    \
   75 } while (0)
   76 
   77 /* Hook invocation that needs an exclusive lock */
   78 #define PMC_CALL_HOOK_X(t, cmd, arg)            \
   79 do {                                            \
   80         sx_xlock(&pmc_sx);                      \
   81         if (pmc_hook != NULL)                   \
   82                 (pmc_hook)((t), (cmd), (arg));  \
   83         sx_xunlock(&pmc_sx);                    \
   84 } while (0)
   85 
   86 /*
   87  * Some hook invocations (e.g., from context switch and clock handling
   88  * code) need to be lock-free.
   89  */
   90 #define PMC_CALL_HOOK_UNLOCKED(t, cmd, arg)     \
   91 do {                                            \
   92         if (pmc_hook != NULL)                   \
   93                 (pmc_hook)((t), (cmd), (arg));  \
   94 } while (0)
   95 
   96 #define PMC_SWITCH_CONTEXT(t,cmd)       PMC_CALL_HOOK_UNLOCKED(t,cmd,NULL)
   97 
   98 /* Check if a process is using HWPMCs.*/
   99 #define PMC_PROC_IS_USING_PMCS(p)                               \
  100         (__predict_false(atomic_load_acq_int(&(p)->p_flag) &    \
  101             P_HWPMC))
  102 
  103 #define PMC_SYSTEM_SAMPLING_ACTIVE()            (pmc_ss_count > 0)
  104 
  105 /* Check if a CPU has recorded samples. */
  106 #define PMC_CPU_HAS_SAMPLES(C)  (__predict_false(pmc_cpumask & (1 << (C))))
  107 
  108 /* helper functions */
  109 int     pmc_cpu_is_disabled(int _cpu);
  110 int     pmc_cpu_is_logical(int _cpu);
  111 
  112 #endif /* _SYS_PMCKERN_H_ */

Cache object: 575a25981210c25a4dd49935fe5b9647


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.