osfmk/kperf/kperf_kpc.h

   1 /*
   2  * Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef __KPERF_KPC_H__
  30 #define __KPERF_KPC_H__
  31
  32 #if KPC
  33 #include <kern/kpc.h> /* KPC_MAX_COUNTERS */
  34 #endif
  35
  36 /* controls whether a context-switch handler is invoked */
  37 extern unsigned kperf_kpc_cswitch_set;
  38
  39 void kperf_kpc_switch_context(thread_t old, thread_t new);
  40 void kperf_kpc_cswitch_callback_update(void);
  41
  42 /* for osfmk/platform/pcb.c context switches */
  43 static inline void
  44 kperf_kpc_cswitch(thread_t old, thread_t new)
  45 {
  46         if (!kperf_kpc_cswitch_set) {
  47                 return;
  48         }
  49
  50         kperf_kpc_switch_context(old, new);
  51 }
  52
  53 /* KPC sample data */
  54 struct kpcdata
  55 {
  56         int      curcpu;
  57         uint32_t running;
  58         uint32_t counterc;
  59         uint64_t counterv[KPC_MAX_COUNTERS+1];
  60         uint32_t configc;
  61         uint64_t configv[KPC_MAX_COUNTERS];
  62 };
  63
  64 void kperf_kpc_thread_sample(struct kpcdata *, int);
  65 void kperf_kpc_cpu_sample(struct kpcdata *, int);
  66 void kperf_kpc_thread_log(const struct kpcdata *);
  67 void kperf_kpc_cpu_log(const struct kpcdata *);
  68
  69 #endif /* __KPERF_KPC_H__ */