osfmk/kperf/task_samplers.c

   1 /*
   2  * Copyright (c) 2016 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 #include <kperf/task_samplers.h>
  30 #include <kperf/context.h>
  31 #include <kperf/buffer.h>
  32 #include <kern/thread.h>
  33
  34 #include <kern/task.h>
  35
  36 extern boolean_t workqueue_get_pwq_exceeded(void *v, boolean_t *exceeded_total,
  37                                             boolean_t *exceeded_constrained);
  38 extern boolean_t memorystatus_proc_is_dirty_unsafe(void *v);
  39
  40 void
  41 kperf_task_snapshot_sample(struct kperf_task_snapshot *tksn,
  42                            struct kperf_context *ctx)
  43 {
  44         thread_t thread;
  45         task_t task;
  46         boolean_t wq_state_available = FALSE;
  47         boolean_t exceeded_total, exceeded_constrained;
  48
  49         BUF_INFO(PERF_TK_SNAP_SAMPLE | DBG_FUNC_START);
  50
  51         assert(tksn != NULL);
  52         assert(ctx != NULL);
  53
  54         thread = ctx->cur_thread;
  55         task = get_threadtask(thread);
  56
  57         tksn->kptksn_flags = 0;
  58         if (task->effective_policy.tep_darwinbg) {
  59                 tksn->kptksn_flags |= KPERF_TASK_FLAG_DARWIN_BG;
  60         }
  61         if (task->requested_policy.trp_role == TASK_FOREGROUND_APPLICATION) {
  62                 tksn->kptksn_flags |= KPERF_TASK_FLAG_FOREGROUND;
  63         }
  64         if (task->requested_policy.trp_boosted == 1) {
  65                 tksn->kptksn_flags |= KPERF_TASK_FLAG_BOOSTED;
  66         }
  67 #if CONFIG_MEMORYSTATUS
  68         if (memorystatus_proc_is_dirty_unsafe(task->bsd_info)) {
  69                 tksn->kptksn_flags |= KPERF_TASK_FLAG_DIRTY;
  70         }
  71 #endif
  72
  73         if (task->bsd_info) {
  74                 wq_state_available =
  75                         workqueue_get_pwq_exceeded(task->bsd_info, &exceeded_total,
  76                                                    &exceeded_constrained);
  77         }
  78         if (wq_state_available) {
  79                 tksn->kptksn_flags |= KPERF_TASK_FLAG_WQ_FLAGS_VALID;
  80
  81                 if (exceeded_total) {
  82                         tksn->kptksn_flags |= KPERF_TASK_FLAG_WQ_EXCEEDED_TOTAL;
  83                 }
  84                 if (exceeded_constrained) {
  85                         tksn->kptksn_flags |= KPERF_TASK_FLAG_WQ_EXCEEDED_CONSTRAINED;
  86                 }
  87         }
  88
  89         tksn->kptksn_suspend_count = task->suspend_count;
  90         tksn->kptksn_pageins = task->pageins;
  91         tksn->kptksn_user_time_in_terminated_threads = task->total_user_time;
  92         tksn->kptksn_system_time_in_terminated_threads = task->total_system_time;
  93
  94         BUF_INFO(PERF_TK_SNAP_SAMPLE | DBG_FUNC_END);
  95 }
  96
  97 void
  98 kperf_task_snapshot_log(struct kperf_task_snapshot *tksn)
  99 {
 100         assert(tksn != NULL);
 101
 102 #if defined(__LP64__)
 103         BUF_DATA(PERF_TK_SNAP_DATA, tksn->kptksn_flags,
 104                  ENCODE_UPPER_64(tksn->kptksn_suspend_count) |
 105                  ENCODE_LOWER_64(tksn->kptksn_pageins),
 106                  tksn->kptksn_user_time_in_terminated_threads,
 107                  tksn->kptksn_system_time_in_terminated_threads);
 108 #else
 109         BUF_DATA(PERF_TK_SNAP_DATA1_32, UPPER_32(tksn->kptksn_flags),
 110                                         LOWER_32(tksn->kptksn_flags),
 111                                         tksn->kptksn_suspend_count,
 112                                         tksn->kptksn_pageins);
 113         BUF_DATA(PERF_TK_SNAP_DATA2_32, UPPER_32(tksn->kptksn_user_time_in_terminated_threads),
 114                                         LOWER_32(tksn->kptksn_user_time_in_terminated_threads),
 115                                         UPPER_32(tksn->kptksn_system_time_in_terminated_threads),
 116                                         LOWER_32(tksn->kptksn_system_time_in_terminated_threads));
 117 #endif /* defined(__LP64__) */
 118 }