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 and manage shared context-switch and AST handlers
  31  */
  32
  33 #include <kperf/kperf.h>
  34 #include <kperf/buffer.h>
  35 #include <kperf/context.h>
  36 #include <kperf/pet.h>
  37 #include <kperf/kperf_kpc.h>
  38 #include <kern/kpc.h> /* kpc_cswitch_context, kpc_threads_counting */
  39
  40 void
  41 kperf_kpc_thread_ast(thread_t thread)
  42 {
  43         kpc_thread_ast_handler(thread);
  44         kperf_thread_ast_handler(thread);
  45         thread->kperf_ast = 0;
  46 }
  47
  48 void
  49 kperf_kpc_thread_sample(struct kpcdata *kpcd, int sample_config)
  50 {
  51         BUF_INFO(PERF_KPC_THREAD_SAMPLE | DBG_FUNC_START, sample_config);
  52
  53         kpcd->running = kpc_get_running();
  54         /* let kpc_get_curthread_counters set the correct count */
  55         kpcd->counterc = KPC_MAX_COUNTERS;
  56         if (kpc_get_curthread_counters(&kpcd->counterc,
  57             kpcd->counterv)) {
  58                 /* if thread counters aren't ready, default to 0 */
  59                 memset(kpcd->counterv, 0,
  60                     sizeof(uint64_t) * kpcd->counterc);
  61         }
  62         /* help out Instruments by sampling KPC's config */
  63         if (!sample_config) {
  64                 kpcd->configc = 0;
  65         } else {
  66                 kpcd->configc = kpc_get_config_count(kpcd->running);
  67                 kpc_get_config(kpcd->running, kpcd->configv);
  68         }
  69
  70         BUF_INFO(PERF_KPC_THREAD_SAMPLE | DBG_FUNC_END, kpcd->running, kpcd->counterc);
  71 }
  72
  73 void
  74 kperf_kpc_cpu_sample(struct kpcdata *kpcd, int sample_config)
  75 {
  76         BUF_INFO(PERF_KPC_CPU_SAMPLE | DBG_FUNC_START, sample_config);
  77
  78         kpcd->running  = kpc_get_running();
  79         kpcd->counterc = kpc_get_cpu_counters(0, kpcd->running,
  80             &kpcd->curcpu,
  81             kpcd->counterv);
  82         if (!sample_config) {
  83                 kpcd->configc = 0;
  84         } else {
  85                 kpcd->configc = kpc_get_config_count(kpcd->running);
  86                 kpc_get_config(kpcd->running, kpcd->configv);
  87         }
  88
  89         BUF_INFO(PERF_KPC_CPU_SAMPLE | DBG_FUNC_END, kpcd->running, kpcd->counterc);
  90 }
  91
  92 void
  93 kperf_kpc_config_log(const struct kpcdata *kpcd)
  94 {
  95         BUF_DATA(PERF_KPC_CONFIG,
  96             kpcd->running,
  97             kpcd->counterc,
  98             kpc_get_counter_count(KPC_CLASS_FIXED_MASK),
  99             kpcd->configc);
 100
 101 #if __LP64__
 102         unsigned int max = (kpcd->configc + 3) / 4;
 103         for (unsigned int i = 0; i < max; i++) {
 104                 uint32_t flag = (i == 0) ? DBG_FUNC_START : ((i == (max - 1)) ? DBG_FUNC_END : DBG_FUNC_NONE);
 105                 BUF_DATA(PERF_KPC_CFG_REG | flag,
 106                     kpcd->configv[0 + i * 4], kpcd->configv[1 + i * 4],
 107                     kpcd->configv[2 + i * 4], kpcd->configv[3 + i * 4]);
 108         }
 109 #else /* __LP64__ */
 110         unsigned int max = (kpcd->configc + 1) / 2;
 111         for (unsigned int i = 0; i < max; i++) {
 112                 uint32_t flag = (i == 0) ? DBG_FUNC_START : ((i == (max - 1)) ? DBG_FUNC_END : DBG_FUNC_NONE);
 113                 BUF_DATA(PERF_KPC_CFG_REG32 | flag,
 114                     kpcd->configv[i * 2] >> 32ULL,
 115                     kpcd->configv[i * 2] & 0xffffffffULL,
 116                     kpcd->configv[i * 2 + 1] >> 32ULL,
 117                     kpcd->configv[i * 2 + 1] & 0xffffffffULL);
 118         }
 119 #endif /* !__LP64__ */
 120 }
 121
 122 static void
 123 kperf_kpc_log(uint32_t code, uint32_t code32, const struct kpcdata *kpcd)
 124 {
 125 #if __LP64__
 126 #pragma unused(code32)
 127         unsigned int max = (kpcd->counterc + 3) / 4;
 128         /* and the actual counts with one 64-bit argument each */
 129         for (unsigned int i = 0; i < max; i++) {
 130                 uint32_t flag = (i == 0) ? DBG_FUNC_START : ((i == (max - 1)) ? DBG_FUNC_END : DBG_FUNC_NONE);
 131                 BUF_DATA(code | flag,
 132                     kpcd->counterv[0 + i * 4],
 133                     kpcd->counterv[1 + i * 4],
 134                     kpcd->counterv[2 + i * 4],
 135                     kpcd->counterv[3 + i * 4]);
 136         }
 137 #else /* __LP64__ */
 138 #pragma unused(code)
 139         unsigned int max = (kpcd->counterc + 1) / 2;
 140         /* and the actual counts with two 32-bit trace arguments each */
 141         for (unsigned int i = 0; i < max; i++) {
 142                 uint32_t flag = (i == 0) ? DBG_FUNC_START : ((i == (max - 1)) ? DBG_FUNC_END : DBG_FUNC_NONE);
 143                 BUF_DATA(code32 | flag,
 144                     (kpcd->counterv[0 + i * 2] >> 32ULL),
 145                     kpcd->counterv[0 + i * 2] & 0xffffffffULL,
 146                     (kpcd->counterv[1 + i * 2] >> 32ULL),
 147                     kpcd->counterv[1 + i * 2] & 0xffffffffULL);
 148         }
 149 #endif /* !__LP64__ */
 150 }
 151
 152 void
 153 kperf_kpc_cpu_log(const struct kpcdata *kpcd)
 154 {
 155         kperf_kpc_log(PERF_KPC_DATA, PERF_KPC_DATA32, kpcd);
 156 }
 157
 158 void
 159 kperf_kpc_thread_log(const struct kpcdata *kpcd)
 160 {
 161         kperf_kpc_log(PERF_KPC_DATA_THREAD, PERF_KPC_DATA_THREAD32, kpcd);
 162 }