osfmk/kperf/kperf_kpc.c

   1 /*
   2  * Copyright (c) 2013 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
  30 /*  Sample KPC data into kperf */
  31
  32 #include <mach/mach_types.h>
  33 #include <kern/thread.h> /* thread_* */
  34 #include <kern/debug.h> /* panic */
  35 // #include <sys/proc.h>
  36
  37 #include <chud/chud_xnu.h>
  38 #include <kperf/kperf.h>
  39
  40 #include <kperf/buffer.h>
  41 #include <kperf/context.h>
  42
  43 #include <kperf/kperf_kpc.h>
  44
  45 /* If we have kperf enabled, but not KPC */
  46 #if KPC
  47
  48 void
  49 kperf_kpc_cpu_sample( struct kpcdata *kpcd, int sample_config )
  50 {
  51         kpcd->running  = kpc_get_running();
  52         kpcd->counterc = kpc_get_cpu_counters(0, kpcd->running,
  53                                               &kpcd->curcpu, kpcd->counterv);
  54         if( !sample_config )
  55                 kpcd->configc = 0;
  56         else
  57         {
  58                 kpcd->configc = kpc_get_config_count(kpcd->running);
  59                 kpc_get_config(kpcd->running, kpcd->configv);
  60         }
  61
  62 }
  63
  64 void
  65 kperf_kpc_cpu_log( struct kpcdata *kpcd )
  66 {
  67         unsigned i;
  68
  69         /* cut a config for instruments -- what's running and
  70          * how many fixed counters there are
  71          */
  72         BUF_DATA(PERF_KPC_CONFIG,
  73                  kpcd->running,
  74                  kpcd->counterc,
  75                  kpc_get_counter_count(KPC_CLASS_FIXED_MASK),
  76                  kpcd->configc);
  77
  78 #if __LP64__
  79         /* config registers, if they were asked for */
  80         for (i = 0; i < ((kpcd->configc+3) / 4); i++) {
  81                 BUF_DATA( PERF_KPC_CFG_REG,
  82                           kpcd->configv[0 + i * 4],
  83                           kpcd->configv[1 + i * 4],
  84                           kpcd->configv[2 + i * 4],
  85                           kpcd->configv[3 + i * 4] );
  86         }
  87
  88         /* and the actual data -- 64-bit trace entries */
  89         for (i = 0; i < ((kpcd->counterc+3) / 4); i++) {
  90                 BUF_DATA( PERF_KPC_DATA,
  91                           kpcd->counterv[0 + i * 4],
  92                           kpcd->counterv[1 + i * 4],
  93                           kpcd->counterv[2 + i * 4],
  94                           kpcd->counterv[3 + i * 4] );
  95         }
  96
  97 #else
  98         /* config registers, if requested */
  99         for (i = 0; i < ((kpcd->configc+1) / 2); i++) {
 100                 BUF_DATA( PERF_KPC_CFG_REG32,
 101                           (kpcd->configv[0 + i * 2] >> 32ULL),
 102                            kpcd->configv[0 + i * 2] & 0xffffffffULL,
 103                           (kpcd->configv[1 + i * 2] >> 32ULL),
 104                            kpcd->configv[1 + i * 2] & 0xffffffffULL );
 105         }
 106
 107         /* and the actual data -- two counters per tracepoint */
 108         for (i = 0; i < ((kpcd->counterc+1) / 2); i++) {
 109                 BUF_DATA( PERF_KPC_DATA32,
 110                           (kpcd->counterv[0 + i * 2] >> 32ULL),
 111                            kpcd->counterv[0 + i * 2] & 0xffffffffULL,
 112                           (kpcd->counterv[1 + i * 2] >> 32ULL),
 113                            kpcd->counterv[1 + i * 2] & 0xffffffffULL );
 114         }
 115 #endif
 116 }
 117
 118 #endif /* KPC */