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 | #include <mach/mach_types.h> |
30 | #include <kern/task.h> /* task_ledgers */ |
31 | #include <kern/ledger.h> |
32 | |
33 | #include <kperf/kperf.h> |
34 | |
35 | #include <kperf/buffer.h> |
36 | #include <kperf/context.h> |
37 | #include <kperf/meminfo.h> |
38 | |
39 | /* collect current memory info */ |
40 | void |
41 | kperf_meminfo_sample(task_t task, struct meminfo *mi) |
42 | { |
43 | ledger_amount_t credit, debit; |
44 | kern_return_t kr; |
45 | |
46 | assert(mi != NULL); |
47 | |
48 | BUF_INFO(PERF_MI_SAMPLE | DBG_FUNC_START); |
49 | |
50 | mi->phys_footprint = get_task_phys_footprint(task); |
51 | |
52 | kr = ledger_get_entries(ledger: task->ledger, entry: task_ledgers.purgeable_volatile, |
53 | credit: &credit, debit: &debit); |
54 | if (kr == KERN_SUCCESS) { |
55 | mi->purgeable_volatile = credit - debit; |
56 | } else { |
57 | mi->purgeable_volatile = UINT64_MAX; |
58 | } |
59 | |
60 | kr = ledger_get_entries(ledger: task->ledger, |
61 | entry: task_ledgers.purgeable_volatile_compressed, |
62 | credit: &credit, debit: &debit); |
63 | if (kr == KERN_SUCCESS) { |
64 | mi->purgeable_volatile_compressed = credit - debit; |
65 | } else { |
66 | mi->purgeable_volatile_compressed = UINT64_MAX; |
67 | } |
68 | |
69 | BUF_INFO(PERF_MI_SAMPLE | DBG_FUNC_END); |
70 | } |
71 | |
72 | /* log an existing sample into the buffer */ |
73 | void |
74 | kperf_meminfo_log(struct meminfo *mi) |
75 | { |
76 | BUF_DATA(PERF_MI_DATA, mi->phys_footprint, mi->purgeable_volatile, |
77 | mi->purgeable_volatile_compressed); |
78 | } |
79 | |